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DEVICES AND METHODS OF OBTAINING SOLID AND LIQUID FUELS FOR DOMESTIC NEEDS

INVENTION
Patent of the Russian Federation RU2149889

WATER-RESISTANT FUEL BRIQUET AND METHOD OF ITS RECEPTION

WATER-RESISTANT FUEL BRIQUET AND METHOD OF ITS RECEPTION

The name of the inventor: M. Airapetyan; N. Buravchuk; Guryanova O.V.
The name of the patentee: GEOS LLC; LLC "Scientific and Technical Center" EKORESURS "
Address for correspondence: 344033, Rostov-on-Don, st. 2-ya Krasnodar, 163/2, kv.36, Buravchuk N.I.
Date of commencement of the patent: 1999.01.13

Moisture-resistant fuel briquette includes carbon-containing component, binder and bottoms of oil refining. It contains, as a binder, a polysaccharide with the following component ratio, by weight: polysaccharide 4-10; Bottoms of oil processing 0.26-0.78; The carbon-containing component is the rest. The method of obtaining it is described. The technical result is the production of a fuel pellet with a low water absorption value, good heat resistance and high mechanical strength.

DESCRIPTION OF THE INVENTION

The group of inventions refers to a composition (moisture-resistant fuel briquette) and a process for its production and can be used in the fuel industry to produce briquettes from waste from the coal mining industry (industrial and domestic fuel).

The composition of fuel briquettes is known, which includes as a carbon-containing component Kansk-Achinsk coal, semi-coke of Kansk-Achinsk coal, Shargunsky, Lipto-biolitic coal, metallurgical coke; As a binder - lignosulfonate, molasses, polyvinyl alcohol; Portland cement was introduced to increase moisture resistance [Vorobiev VN, Leschenko PS, Klimova LK Ecologically clean binders for obtaining household fuel from coals of small classes // Chemistry of Solid Fuel, 1997, N 2].

The disadvantage is the high water absorption - 10.5-12.7%. The addition of cement reduces the caloric content of briquettes, increasing their ash content. Cement is a fairly costly component, as it is a factory-made product.

A fuel briquette is known which includes a heat-treated molding mixture of coal fines and a binder containing a sulfonic acid derivative (not less than 0.5% of the weight of coal) and tallow pitch, which is the residue of tall oil rectification, in an amount not less than 0.5% of the weight of the coal [ Patent of the Russian Federation No. 2,078,120. A fuel briquette and a method for producing it. Luriy V.G. Bul. Fig., 1997, No. 12].

A disadvantage of the invention is the presence in the briquette of an ecologically unfavorable component - tallow pitch, which determines the heat treatment of briquettes.

A method for producing moisture-resistant briquettes is known, in which a coal fines is used and as a binder is a product of microbiological processing of carbon-containing material. Moisture resistance and additional mechanical strength of briquettes are provided by impregnating them in the melt of paraffin [Aut. Svid. N 1810381. Method of production of moisture resistant fuel briquettes. Ivanov IP, Demidov Yu.V., Druzhzh PV. And others. Fig. , 1993, No. 15].

A disadvantage of the invention is the use of insufficiently available raw material as a binder, as a hydrophobic coating - a factory-made product, but also the complexity and large energy intensity of the technological process for obtaining briquettes with low moisture absorption.

A composition is known in which brown carbon is used as a carbonaceous component, and hydrolytic lignin as a binder. To provide moisture resistance to briquettes, a protective coating is applied to the hydrocarbon-containing component - GACh [Saranchuk VI, Pashchenko VL, Galushko LA, et al. Influence of the composition of brown coal-lignin briquettes on their water absorption // Chemistry of solid fuels, 1995, N 1].

The disadvantage of this composition is the high water absorption of the briquettes; The heat resistance of the fuel briquette is not indicated.

A method for producing solid carbonaceous fuel is known, which consists in preparing pulp, mixing it with coal fines, pressing briquettes and drying at ambient temperature for at least 24-48 hours. Next, to give the briquettes a moisture resistance, they are placed on a grid and dipped in a preheated 60-70 ° C hydrophobic agent [Application No. 930012909/04. Method of obtaining fuel briquettes "Sashko". Efimenko AA, Efimenko SV, Yarovoy NK And others. Image, 1996, No. 6].

The disadvantage of this method is the need for additional technological operations: maceration of paper, dipping of finished briquettes in a heated water repellent. With this method, surface hydrophobization is achieved, and if the integrity of the hydrophobic coating is compromised, the moisture resistance of briquettes is sharply reduced.

A method for producing moisture-resistant fuel briquettes is known by mixing crushed solid combustible material with products of microbiological processing of carbon-containing material, pressing the mixture at a pressure of 120-180 MPa and impregnating the finished briquettes in a paraffin melt at a temperature of 80-105 ° C [ Svid. N 1810381. Method of production of moisture-resistant fuel briquettes. Ivanov IP, Demidov Yu.V., Druzhzh PV. And others. Image, 1993, No. 15].

The disadvantage of the method is the use of energy-intensive technological operations, the use of a poorly accessible binder and as a hydrophobic product - a product for a specific purpose.

Known is the method by which coal is dried at a temperature of 105 ° C, part of the coal (fine fraction) is mixed with a hydrophobizer, then with the rest of the coal (coarse fraction) and with a binder, the entire batch is heated to 90-100 ° C and briquettes are pressed [Aut . Svid. USSR No. 1293203. The method of coal briquetting. Elishevich AT, Kurmankulov Sh.Zh., Beletsky BC, etc. Bul. Fig. , 1987, No. 8].

The disadvantage of this method is a complex technology involving operations on the separation of coals into fractions, and the presence of technological difficulties in mixing a fine fraction of 0-0.5 mm with a reagent-hydrophobizer by spraying with a pulverizer while mixing the coal.

The most similar composition is the composition of the same purpose, including the carbon-containing component (anthracite slab, coal fines, etc.), as binder - sulphite-yeast mash and petroleum bitumen, the latter simultaneously plays the role of a hydrophobizer, with the following component ratio, weight .%:

Sulphite-yeast mash - 2,4-6,4

Petroleum bitumen - 1,2,4,2

Anthracite cobbles or coal fines - the rest

The disadvantage of the prototype is insufficiently high moisture resistance and heat resistance [Aut. Svid. N 1452841 A1. The method of coal briquetting. Elishevich AT, Kurmankulov Sh.Zh., Beletsky BC, etc. Bul. Image, 1989, No. 3].

The closest method of the same designation to the claimed method in the group of inventions for a plurality of features is a method for producing waterproof briquettes by which the binder is mixed with coal, briquettes are compressed at a pressure of 100 MPa and a film-forming coating is formed on their surface by treating the briquette in the melt of the hydrophobizer at a temperature of 150- 170 ° C [Saranchuk VI, Pashchenko LV, Glushko AI Et al. Influence of the composition of brown coal-lignin briquettes on their water absorption // Chemistry of solid fuels, 1995, N 1].

The disadvantage of this method is the high energy intensity associated with obtaining the melt of the hydrophobizer. With this method, a surface hydrophobization is achieved and a violation of the integrity of the film coating entails a significant reduction in the moisture resistance of the fuel briquette. A high pressure of pressing leads to an overestimation of energy costs.

A unified technical result for the composition and method is an increase in the moisture resistance and heat resistance of the fuel briquette.

Said unified technical result in the implementation of a group of inventions on a composition object is achieved in that the composition includes a carbonaceous component, a binder and bottoms of oil refining. In this case, as a binder, it contains a polysaccharide with the following component ratio, by weight:

Polysaccharide - 4-10

Bottoms of oil refining - 0,26-0,78

Carbon-containing component - the rest

As the carbon-containing component, for example, anthracite slab, coal fines, coal sludge or a mixture thereof can be used.

As a polysaccharide, for example, waste from wine, sugar, pulp and paper, starch production can be used.

Said unified technical result in the implementation of the group of inventions for the object "method" is achieved by heating the carbonaceous component and binder, mixing and pressing them, including the hydrophobization step. At the same time, the carbon-containing component, binder and bottoms of oil processing are heated to a temperature of 51-70 ° C, followed by volumetric hydrophobization when mixing bottoms of oil and binder in a ratio of 1.0 :( 12.8-15.4) and mixing the obtained mixture with a carbon-containing component, the pressing being carried out at a pressure of 25-45 MPa.

The binder-polysaccharide can serve as a product with a general formula (C n H 2m O m ), which is a high-polymeric carbohydrate, and a waste of sugar, wine, starch, pulp and paper production.

Representatives of the target products, such as starch, dextran, cellulose, dextrin, sugar, etc., are similar in chemical composition to each other, but differ in the size of macromolecules and in structure. Thus, starch and cellulose are constructed from the units - C 6 H 10 O 5 -, which are the residues of six-membered cyclic forms of glucose molecules that have lost the water molecule; therefore, the composition of both starch and cellulose is expressed by the general formula (C 6 H 10 O 5 ) x . The difference in the properties of these polysaccharides is due to the spatial isomerism of the monosaccharide molecules that form them: the starch is constructed from links -form, and cellulose- -forms of glucose.

Dextrin contains about 60-70% pure dextrin, 2-9% sugar, 13-20% insoluble substances and 6-14% water.

Starch contains 97-99% of pure starch, 0.28-0.40% of mineral substances, 0.28-0.78% of proteins.

Cellulose has the following indicators: 95-98% Cellulose, 0.15-0.25% lignin, 1.8-4.0% pentasans, 0.07-0.14% resin, 0.06-0.13% ash.

Binders from the class of polysaccharides are amorphous substances that can not crystallize. Soluble polysaccharides easily swell in water and form viscous colloidal solutions in it.

Waste from sugar and wine production - the so-called molasses or molasses - belongs to the group of disaccharides. They contain up to 45-50% of beet or cane sugar C 12 H 22 O 11 .

Molasses sugar-beet production contains up to 20% water, 45-50% sugar, 20-25% organic matter and 10% mineral non-sugar substances.

A lot of wineries besides dextrose and levulose contain up to 50% cane sugar.

Polysaccharide solutions are characterized by significant viscosity, the specific gravity varies from 1.32 to 1.52 g / cm 3 .

The bottoms of primary oil refining and bottoms of secondary oil refining can be used as bottoms of oil refining.

The bottoms of primary oil refining are high-viscosity, often solidifying products of dark color with a specific gravity of 0.88-1.0 g / cm 3 ; Boiling at a temperature above 350 ° C; The viscosity is conditional, the VU ( o C) is 25 (80 o ), the ash content is 0.2%, the sulfur content is 1.0%, the pour point is +42 o C. Elementary composition: 83.5-88.5% C , 10.5-12.5% ​​N.

The bottoms of secondary oil refining are solid products with a specific gravity of 0.88-0.915 g / cm 3 , the melting point is 50-70 ° C, the flash point is 136-137 ° C, the boiling point is 300-500 ° C.

The composition of bottoms consists mainly of saturated hydrocarbons of the composition C 19 H 40 -C 35 H 72 with a molecular weight of 300-500 and a melting point of 50-70 ° C and a composition C 37 H 76 -C 53 H 108 with a molecular weight of 500-700 , Melting point 65-90 o C. In the composition there are also oils in an amount from 2 to 30%.

Moisture-resistant fuel briquettes contain both anthracite cobbles, coal fines, coal sludge or a mixture thereof.

Anthracite shtib - screenings of anthracite and waste of coal-washing plants, granular fraction (0-6 mm). Anthracite is the most carbonated variety of fossil coal. The breed is grayish-black or black-gray with a bright metallic gloss. Fracture is always conchoidal.

Characteristic of anthracite coal and anthracite cobbles from it:

Carbon content in organic matter,% - 89-98

Density, g / cm 3 - 1.42-1.80

Volatile yield,% - 1,5-9,0

Higher specific heat of combustion, MJ / kg - 33,5-35,2

Coal fines - screenings of coal and waste of coal-washing plants. Coal is a dense rock, predominantly banded, less often homogeneous, black or gray-black with a shiny, semi-matt or matte surface.

Characteristics of coal and coal fines from it:

Carbon content in organic matter,% - 74-92

Density, g / cm 3 - 1.2-1.8

Volatile yield,% - 8-50

Higher specific heat of combustion, MJ / kg - 30,5-36,8

Coal slurry is a small class of stone, anthracite coals, the size of coal particles does not exceed 10-40 microns, waste of coal-washing plants.

Moisture-resistant fuel briquette is prepared as follows. The binder-polysaccharide is heated to a temperature of 51-70 ° C in an amount of 4-10% by weight, bottoms of oil processing in the amount of 0.26-0.78% by weight and the carbon-containing component is the rest. The binder is mixed - the polysaccharide and the bottoms of oil refining in a ratio of 1.0 :( 12.8-15.4), the obtained mixture is mixed with the carbon-containing component - anthracite slab, coal fines, coal slurry or a mixture thereof and mixed until the components are evenly distributed. At the same time, volumetric hydrophobization of the briquette is achieved. The briquette is pressed at a pressure of 25-45 MPa. Pressed briquettes are reinforced with cooling under natural conditions or accelerated by forcing by drying at a temperature of 105-110 ° C for 30-45 minutes.

The briquettes obtained are moisture-proof and do not collapse under the influence of atmospheric precipitation, they have high thermal stability.

The claimed group of inventions meets the requirement of unity of invention, since a group of diverse inventions form a single inventive concept, one of the declared objects of the group - the method of obtaining a moisture-resistant fuel briquette - is intended for manufacturing another claimed object - a moisture-resistant fuel briquette.

The difference between the proposed invention and the prototype is the following. A moisture resistant fuel briquette (composition) containing a polysaccharide as a binder is proposed in the application, with the following component ratio, by weight: polysaccharide 4-10, bottoms of oil processing 0.26-0.78, carbon-containing component - the rest. Said briquette is produced by a method in which a carbonaceous component, a binder and bottoms of oil refining are heated to a temperature of 51-70 ° C; Volumetric hydrophobization is achieved by mixing the bottoms of oil refining and the binder - polysaccharide in a ratio of 1.0 :( 12.8-15.4) and then mixing the resultant mixture with a carbon-containing component. The briquette is then compressed at a pressure of 25-45 MPa.

Thus, each of the objects of the group of inventions corresponds to the condition of novelty.

The following can serve as a proof of the conformity of the considered invention to the condition of the inventive level.

The bottoms of oil processing, which are an anionic water repellent, adsorbed on the surface of carbon particles on active sites, in pores and capillaries, displace water, modify the surface of coal particles. Water gets rid of contacts with the carbon surface and therefore the coal capillaries leave relatively easily. The removal of water is facilitated by the application of a pressing force.

A thin adsorption adhesive layer of the introduced binder is formed around the carbon particles with a modified surface due to the action of hydrogen bonds and electrostatic forces, the polysaccharide activated by the bottoms of oil refining - an anionic hydrophobizator. Interaction of carbon particles occurs through these adsorption adhesive layers of a high degree of order.

The anionic hydrophobic agent combines well with the binder to form a homogeneous polymer solution. The presence of an anionic hydrophobic agent increases the surface activity of the binder, enhancing its adhesive capacity. In addition, the bottoms of oil refining create a structuring effect, which is manifested in the enhancement of cohesive interaction in the binder, the polysaccharide, which ultimately provides a high strength briquette. The viscosity of the adsorption layer of the binder in the presence of an anionic hydrophobizator increases, which causes a high stickiness of the binder, and this contributes to the improvement of strength and other parameters of the physical and mechanical properties of the briquette.

Penetration of macromolecules of bottoms of oil refining into adsorption layers (adhesive layers) of the binder-polysaccharide leads to hydrophobic interactions, due to which the hydrophilic centers of the system "the modified solid surface-binder" are blocked. As a result, the affinity for water in such a system is reduced.

In addition to the displacing action, the anionic hydrophobizer, which uses the bottoms of oil refining, demonstrates simultaneously a solubilizing effect that reduces the harmful effect of water penetrating the binder diffusively. The bond strength reaches a maximum in the case when the adhesive layers at the contact points become equal to the thickness of the adsorption layer. The applied pressing force promotes the convergence of the carbon particles to the contact of the adsorption layers of the binder. Compaction of the mixture during pressing with a pressure of 25-45 MPa contributes to the provision of a waterproof, strong adhesion bond.

All these factors: modifying the surface of the sorbent (carbon-containing component), activating the binder, blocking the hydrophilic centers of the "solid-binder" system, providing volumetric hydrophobization, structuring of the binder, solubilization and immobilization of water and strengthening of the adhesive bonds during pressing - provide moisture-proof, heat-resistant and Strong briquettes.

The proposed method is based on the hydrophobization of the carbon-containing component and the binder in the volume of the briquette. The main reason for the increase in moisture resistance of the briquette is that with the chosen quantitative ratio of components and with the selected sequence of actions in the method, the greatest effect of hydrophobization of the fuel briquette is achieved.

Anionic hydrophobic agent when mixed with a binder is evenly distributed in it, resulting in a homogeneous polymer solution. When such a solution is mixed with the carbon-containing component, uniform coagulation of the coal particles occurs with a mixture in which the binder is simultaneously a carrier of the hydrophobic component.

Hydrophobizer has a structuring effect on the binder and promotes the formation of an adsorption layer of the adhesive; The resulting structure has an increased thixotropy, high elastic and elastic properties. This method of introducing the hydrophobizator provides for the modification of the surface of the adsorbent (carbon-containing component) in the direction of increasing its activity, promotes solubilization of unbound water, and creates a volumetric hydrophobization of the briquette.

The mechanical force created by pressing with a pressure of 25-45 MPa, contributes to thinning and compacting the adsorption layers that determine the interaction of particles, and the formation of a dense structure of the polydisperse grain composition system.

The adsorption-cohesive interaction between the sorbent and the binder, modified by the anionic hydrophobizer (bottoms of oil refining), reinforced by the pressing pressure, promotes the formation of a strong conglomerate that, when burned, works as a single whole. At high temperatures, the binder does not melt.

The proposed method provides moisture resistance, heat resistance and the necessary and sufficient mechanical strength of the fuel briquette.

Thus, each of the objects of the claimed group of inventions corresponds to the condition of the inventive level.

The rationale for the selected limits of the quantitative characteristics of the fuel briquette is as follows.

The introduction of a polysaccharide binder in an amount of less than 4 wt.% Does not ensure complete coagulation of the carbon particles and create a continuous adsorption layer for contacting the interacting particles. As a result, moisture resistance, heat resistance, mechanical strength and other parameters of the physical and mechanical properties of the briquette are not ensured.

The content of binder more than 10% by weight leads to the formation of a bulk adsorption layer, which gives the structural skeleton an increased plasticity: the interaction of the coal particles occurs through poly-layers, and the strength of the briquette is determined in this case mainly by the strength of the cohesive bonds of the binder. This strength is not sufficient to ensure moisture resistance, thermal stability and mechanical strength of the briquette.

The content of bottoms of oil refining below 0.26% by weight is insufficient to modify the surface of coal particles and to show a structuring effect on the binder, which ultimately affects the physical and mechanical properties of the briquette.

At the content of bottoms of oil refining over 0.78 mass%, the plasticizing effect in the system "coal particle-binder" predominates. Excess of bottoms of oil refining reduces the strength of structural bonds, gives "looseness" to the structure of the briquette, which leads to a loss of its moisture resistance.

The possibility of carrying out the invention according to the composition of the briquette is confirmed by the following information. In the manufacture of moisture-resistant fuel briquette anthracite slab with a grain size of 0-6 mm is used in an amount of 93.5 wt. %. As a binder apply molasses in an amount of 6% by weight, which is a waste of sugar production. Bottom residues of thermal cracking of paraffins of normal structure in an amount of 0.5% by weight are used as bottoms of oil refining.

The ratio of components is set preliminary in the laboratory.

The anthracite slab with an initial moisture content of 6% by weight is heated to a temperature of 60 ° C., dosed and sent to a mixer.

Preliminarily prepare a mixture of molasses with bottoms of thermocracking of paraffins of normal structure. In molasses, warmed to a fluid-like state (temperature 60 ° C), bottoms of thermal cracking of normal paraffins heated to the same temperature are introduced, mixed in a propeller or other type of non-rapid stirrer until a homogeneous mass is obtained. The thus prepared mixture of molasses with bottoms at a temperature of 60 ° C. is mixed with anthracite slag.

Stirring is carried out in a continuous continuous screw mixer until the components are evenly distributed. The charge from the mixer is fed to a roller press, which creates a pressing pressure of 35 MPa. The molding of the briquettes is made from a charge having a temperature of 60 ° C.

The pre-hardening of briquettes occurs as it cools down to ambient air temperature or accelerates the hardening by forced drying at a temperature of 105-110 ° C for 30-45 minutes.

To test the proposed moisture-proof fuel briquettes and compare them with the prototype, laboratory samples of briquettes were prepared, the results of which are given in Table. 1, comparison with the prototype - in Table. 2.

WATER-RESISTANT FUEL BRIQUET AND METHOD OF ITS RECEPTION

As follows from the data given, fuel briquettes according to the claimed composition have low values ​​for water absorption, very good heat resistance and high mechanical strength. The water absorption in the prototype is higher than that of the claimed object, and the heat resistance, dropping strength and compressive strength are lower. The declared fuel briquette does not crumble during combustion, it retains its shape and, during combustion, can withstand mechanical stress, which can occur when bedding of briquette fuel in the furnace space and shurka. There is no smell and smoke when burning.

The proposed composition of the fuel briquette ensures the production of smokeless coal fuel, competitive on the world market, on the basis of anthracite and coal tar waste.

In the claimed method, the proposed composition of the fuel briquette is assumed.

The proposed method includes heating the carbon-containing component, the binder-polysaccharide and bottoms of oil refining to 51-70 o C. The bottoms of oil refining and the binder-polysaccharide are mixed in a ratio of 1.0: (12.8-15.4). The resulting mixture of the two components is mixed with the carbonaceous component. At the same time, a volume hydrophobization of the briquette is achieved. The obtained batch, having a temperature of 51-70 ° C, is compressed at a pressure of 25-45 MPa. Pressed briquettes are strengthened by cooling under natural conditions or accelerated by forcing by drying at a temperature of 105-110 ° C for 30-45 minutes.

Justification of the selected limits of quantitative characteristics of the method for obtaining a fuel briquette is as follows.

The heating of the components to a temperature below 51 ° C is insufficient to ensure the fluidic state of the binder-polysaccharide mixture with the bottoms of oil refining and the uniform distribution of this mixture when mixed with the carbon-containing component.

The heating of components to temperatures above 70 ° C is irrational due to energy overexpenditure, and possible destructive changes in the binder and bottoms of oil refining, which negatively affect their properties.

The choice of the limits of the ratio between the bottoms of oil refining and the binder - polysaccharide 1.0 :( 12.8-15.4) is due to the fact that narrowing the limits will lead to a decrease in the mobility (spreading) of the mixture of these two components, which will make it difficult to distribute the mixture uniformly when mixed with the carbon-containing component, and the expansion of the limits does not provide the required properties of a mixture of these two components upon introduction Them into the carbon-containing component: volumetric hydrophobization of the briquette is not achieved due to insufficient concentration of the hydrophobizer (bottoms of oil refining).

Pressing pressure below 25 MPa does not provide sufficient mechanical strength of the briquette.

Pressing pressure above 45 MPa is irrational due to over-expenditure of energy. The required mechanical strength of the briquette is achieved in the pressure pressing range of 25-45 MPa.

The ability to implement an invention on an object is a method that is confirmed by the following information. Anthracite sticks of 0-6 mm in size and 6% by weight moisture are heated to a temperature of 55 ° C. The molasses binder, which is a waste product of sugar production, is heated to a temperature of 55 ° C to give it a fluid-like state. To a temperature of 55 ° C, the bottoms of thermal cracking of paraffins of normal structure are heated. Heated molasses and bottoms of thermocracking of paraffins of normal structure are dosed in a ratio of 1: 13 and mixed until the components are evenly distributed. The resulting mixture in an amount of 6% by weight is mixed with anthracite slab, taken in an amount of 94% by weight. %, Are mixed until the components are uniformly distributed (3-5 minutes) in a laboratory mixer. At the same time, a volume hydrophobization of the briquette is achieved. The charge is pressed in a pre-heated form on the press, the pressing pressure is 35 MPa. Pressed briquettes are reinforced with cooling under natural conditions or accelerated by forcing by drying at a temperature of 105-110 ° C for 30-45 minutes.

A proof of the conformity of the claimed invention with the condition "industrial applicability" can be as follows.

When using the claimed group of inventions, the following set of conditions is fulfilled:

- the means embodying the claimed invention in its implementation is intended for use as a moisture-proof and heat-resistant briquette produced by the proposed method as industrial and domestic fuel;

- for the claimed group of inventions as it is characterized in the independent clauses of the foregoing claims, it is confirmed that they can be carried out using the means and methods described above in the application (see "Information to Support the Invention").

The claimed invention in its implementation ensures achievement of the unified technical result envisaged in the application, which consists in creating a moisture-proof and heat-resistant briquette by the proposed method.

Consequently, the claimed group of inventions corresponds to the condition of "industrial applicability".

CLAIM

A moisture resistant fuel briquette comprising a carbonaceous component, a binder and bottoms of oil refining, characterized in that it contains as a binder a polysaccharide with the following component ratio, by weight:

Polysaccharide - 4 - 10

The bottoms of oil refining - 0,26 - 0,78

Carbonaceous component - Other

2. A method for producing a moisture-resistant fuel pellet by heating a carbonaceous component and a binder, mixing and compressing them, the method comprising the step of hydrophobizing, characterized in that heating of the carbonaceous component, binder and bottoms of oil refining is carried out at a temperature of 51 ° -70 ° C. followed by volumetric hydrophobization by mixing Bottoms of oil refining and binder in a ratio of 1.0: (12.8-15.4) and mixing the resulting mixture with a carbon-containing component, the pressing being carried out at a pressure of 25 to 45 MPa.

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Date of publication 01/16/2007