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INVENTION
Russian Federation Patent RU2172306

RAW MIX FOR MAKING WALL PRODUCTS

Name of the inventor: Glebov MP .; Lohova NA .; Patramanskaya SV
The name of the patentee: Bratsk State Technical University
Address for correspondence: 665709, Irkutsk, Bratsk. Str. Makarenko, 40, Bratsk State Technical University, the patent department
Starting date of the patent: 1999.12.06

Use: production of wall ceramic materials.

Said invention is to increase the strength while reducing the firing temperature. As raw material mixture components used: wt% microsilica production of silicon metal 77;. liquid glass 17-19; technogenic flow of pulp production 6-4. The components are mixed, from the resulting blend is shaped by dry pressing samples were dried and calcined at 300-500 ° C. Physical and mechanical properties are as follows: the average density of 1260-1280 kg / m 3, the compressive strength 29,3-0,3 MPa, water absorption 36-37,4%.

DESCRIPTION OF THE INVENTION

The invention relates to the manufacture of building materials and can be used for the manufacture of kiln wall materials.

The closest to the proposed crude mix is a raw material mixture comprising 77. . 59 wt. % Silica fume production of crystalline silicon, and 23 ... 41 wt.% Gliezha [RU N 2130912, 1999 N 15 BI]. The disadvantage of this invention is the relatively high burning temperature and low strength of products based on it.

The proposed raw meal improves the quality characteristics of the material, but also contributes to the solution of environmental problems through the use of a part of the burden of the proposed tonnage of waste as silica fume and man-made drainage pulp production.

The proposed solution ensures the achievement of a technical result - increasing strength while reducing the firing temperature.

This technical result is achieved by the fact that, as a raw material components used microsilica crystalline silicon production, water glass and man-made drainage of pulp production in the following ratio (wt.%):

  • micro-silica crystalline silicon production - 77
  • liquid glass - 17-19
  • technogenic flow of pulp production - 6-4

Silica fume (the waste Bratsk aluminum plant) is deposited in the gas cleaning crystalline silicon production systems and is a fine dust with a particle size (0.1 ... 3 mm), which annual output is about 20-25 thousand. Tonnes. The bulk density of microsilica to 300 kg / m 3. According to the chemical composition of microsilica comprises (in wt.%):

  • SiO 2 - 90 ... 95
  • Al 2 O 3 - 0.8
  • Fe 2 O 3 - 0.8
  • CaO - 1.6
  • MgO - 1.2
  • SiC - 5
  • C Society - to 9
  • K + - 0.25
  • Na + - 0.06
  • LOI - 20

The proposed solution of sodium silicate is used, the resulting technology [RU N 2056353, 1996 N 8 BI] and purified and man-made drainage pulp production. Man-made flow generated during the treatment technology of wastewater cellulosic production and dumped in the river Vihorevka. Man-made stock Bratsk LPK contains the following components in mg / l:

  • suspended solids - 8.5
  • phenols - 0,005
  • dimethyl - 0,002
  • nitrites - 0.04
  • nitrates - 0.18
  • sulfates - 110
  • tallow products - 1.49
  • ammonium nitrogen - 0.1
  • phosphorus - 0.37
  • chlorides - 130
  • lignin - 52
  • Formaldehyde - 0,02
  • methanol - 0.17
  • furfural - 0.01
  • iron - 0.34

Example
For the preparation of the raw material mixture used microsilica production of crystalline silicon, and water glass (silicate module 2) and man-made drainage pulp production.

RAW MATERIALS FOR THE MANUFACTURE OF MIXTURE wall products. Russian Federation Patent RU2172306

From water glass and man Photo prepare a suspension, which is stirred with silica fume. From the resulting blend is molded product by dry pressing under a specific pressure of 20 MPa. Semi-finished product is dried at 100-110 o C to constant weight, and calcined at 300-500 o C. Specific examples of compositions and physical and mechanical properties of products based thereon are shown in Table. 1 and 2.7

CLAIM

The raw material mixture for manufacturing building articles and an additive comprising microsilica, characterized in that as an additive it contains sodium silicate and production man-made cellulosic stock in the following ratio, wt.%:

  • This silica fume - 77
  • Liquid glass - 17 - 19
  • Man-made flow of pulp production - 6 - 4

    • said stock has the following composition in mg / l:

      • Suspended solids - 8.5

      • Phenols - 0,005

      • Dimethyl - 0,002

      • Nitrite - 0.04

      • Nitrates - 0.18

      • Sulfates - 110

      • Tall oil products - 1.49

      • Ammonium nitrogen - 0.1

      • Phosphorus - 0.37

      • Chloride - 130

      • Lignin - 52

      • Formaldehyde - 0.02

      • Methanol - 0.17

      • Furfural - 0.01

      • Iron - 0,34n

print version
Publication date 31.10.2006gg