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INVENTION
Russian Federation Patent RU2284221

METHOD FOR COLLECTIVE concentrate for precious metal recovery

Process for the preparation of bulk concentrate
TO REMOVE THE PRECIOUS METALS

Name of the inventor: Smetannikov Andrei Filippovich (RU); ONOS Dmitry V. (RU); Krasnoshtein Arkady E.
The name of the patentee: Closed Joint Stock Company "Uralkali-technology"
Address for correspondence: 614039, Perm, P / 1629 AH Filonov
Starting date of the patent: 2006.01.10

The invention relates to methods for producing a bulk concentrate for the recovery of precious metals from clay-salt residue plants processing potassium-magnesium ore and rock salt. A method for producing a bulk concentrate from clay-salt residue of plants processing potassium-magnesium ore and rock salt for the recovery of precious metals, includes a three-stage hydrocyclone separation of sludge to concentrate on hydrocyclone receives sludge with a ratio S: L = 1: 3. Gidrotsiklirovanie sequentially through 10, 7 and 5-degree hydrocyclones and bulk concentrate from clay-salt residue of plants processing potassium-magnesium ore and rock salt for the recovery of precious metals, is a mixture of sediment and float material, which are insoluble in water, sludge residue , draining the second hydro-cyclone in the form of a salt solution and floated part of insoluble in water residue sludge to natural and man-made organic substances fed to the third stage hydrocyclone with the release on it through the drain nozzle floated fraction with natural and man-made organic and subsequent association with concentrates of the first and second hydrocyclones and formation of the bulk concentrate, at the same time through a sand nozzle leaves a salt solution, which is the tails enrichment process, and recycle sludge halurgical and flotation plant with a high content of natural and man-made organic. The technical result - to obtain a concentrate containing natural and man-made organic, which concentrated a large proportion of the precious metals, with cost savings.

DESCRIPTION OF THE INVENTION

The invention relates to methods for producing a bulk concentrate for the recovery of precious metals from clay-salt residue plants processing potassium-magnesium ore and rock salt. It can also be used to separate two or more components in the form of solid particles that are in a different "phase" condition, such sludge and floatable particles, wherein the liquid phase can be represented by two, and (or) more components differing in solubility or density .

A method for producing a bulk concentrate from clay-salt residue of plants processing potassium-magnesium ore and rock salt includes hydrocyclone, carried out in three stages, the bulk concentrate hydrocyclones is a solid phase consisting of sedimentary and floated part representing the water insoluble residue (HO ) ostatochnm slurries containing Na and K salts is not more than 15%. In the step of the first hydrocyclone, a ratio S: L = 1: 3, isolated concentrate a large fraction of NO and an outlet of the first hydrocyclone in the form of fines HO and brine, plums first hydrocyclone raspulpovyvayut to T: L = 1: 8 and sent to perechistki the second hydrocyclone stage with the release of her concentrate in the form of residual (small) fraction BUT sludge. Draining of the second hydrocyclone as a salt solution and floated fraction BUT directed to the third hydrocyclone stage, where through the drain nozzle flotation concentrate is released, and after combining with the first and second kontsentatami hydrocyclones formed bulk concentrate. The salt solution leaving the nozzle through a sand third hydrocyclone is tails enrichment process.

The technical result - getting the bulk concentrate (BUT) sludge with a residual K and Na salts is not more than 15% of the chlorinating roasting to recover Au, Pt, Pd from clay-salt residues (sludge).

There are ways of classifying the crushed material, similar to the invention by the technical essence [Handbook of enrichment of ores. T.1. Preparatory processes. M .: Nedra, 1972, S.276-278, Cooks AI Hydrocyclones. M .: Gosgortekhizdat 1961], in a centrifugal field generated by the rotation of pulp (hydro-cyclones, where the liquid phase is represented by water).

This separation may be particle size, wherein large particles leaving the nozzle at a sand and small particles - in the sink. When reducing the taper angle in a sand nozzle can go and fine material, but with a higher density than the bulk of the particulate material [Smetannikov AF, AI Kudryashov The possibility of extracting gold and silver from ore deposits of salts Verkhnekamskoye // Ores and metals. 1995. №5. S.118-121.]. These methods are designed for the separation of a liquid medium in a solid material by size or density. However, these methods have not been used previously for separation of solid material, uniformly distributed in the brine. For example, waste potash enterprises (sludge) are represented by two phases. One phase - a saturated salt solution, the second - the particles of water insoluble residue (NO).

A method of producing a concentrate from clay-salt residue of plants processing potassium-magnesium ore and rock salt for the recovery of precious metals (patent №2256504, publ. 2005.07.20), comprising at least two-stage hydrocyclone slurry concentrate with the release, the hydrocyclone carried out in two or three steps, hydrocyclones concentrate is a solid phase - water insoluble residue (HO) slurries, wherein at hydrocyclone receives sludge with a ratio S: L = 1: 3, in the step of the first hydrocyclone separated concentrate a large fraction BUT and drain of the first hydro-cyclone in the form of fines BUT and salt solution, draining the first hydrocyclone raspulpovyvayut to S: L = 1: 8 and sent to perechistki the second hydrocyclone stage with the release of her concentrate in the form of residual fraction BUT sludge and drain of the second hydrocyclone in a salt solution and then combining the selected hydrocyclone concentrates, while in the case of a large residual content of NO in the sink of the second hydrocyclone perform additional third stage hydrocyclone, thus halurgical processed sludge and flotation plants.

The disadvantage of this method is not sufficiently high percentage of precious metal in concentrate from clay-salt residues enterprises.

The proposed invention solves the problem of complex extraction of mineral resources represented by clay-salt residues (slimes) of potassium production and labeled clays containing chlorides of alkali and alkaline earth elements contained in these precious metals, with cost savings.

To achieve the said technical result in the production method of bulk concentrate from clay-salt residue of plants processing potassium-magnesium ore and rock salt for the recovery of precious metals, which includes three-stage hydrocyclone the sludge to concentrate the release, and on the hydrocyclone receives sludge with a ratio S: L = 1 3, hydrocyclone sequentially through 10, 7 and 5 degree cyclones and bulk concentrate from clay-salt residue of plants processing potassium-magnesium ore and rock salt for the recovery of precious metals, is a mixture of sediment and float material representing the insoluble residue sludge, draining of the second hydrocyclone in a salt solution and floated part of insoluble in water residue sludge to natural and man-made organic is sent to a third hydrocyclone stage with the release of her through the drain nozzle floated fraction with natural and man-made organic and subsequent concentrates association with the first and second hydrocyclones and formation bulk concentrate, with a nozzle through a sand salt solution being tails enrichment process, and recycle sludge halurgical and flotation plants with high content of natural and man-made organic.

Distinctive features of the proposed method from the prior art most similar is that the hydrocyclone is performed sequentially through 10, 7 and 5 degree cyclones and bulk concentrate from clay-salt residue of plants processing potassium-magnesium ore and rock salt precious metals recovery, is a mixture of sediment and float material constituting the water-insoluble residue sludge drain of the second hydrocyclone as a salt solution and floated part insoluble residue sludge with natural and man-made organic is sent to a third hydrocyclone stage with separation therein through the drain nozzle floated fraction with natural and man-made organic and subsequent association with concentrates of the first and second hydrocyclones and formation of the bulk concentrate, while through a sand nozzle comes out of salt solution, which tails enrichment process, and recycle sludge halurgical and flotation plant with a high content of natural and man-made organic .

Thanks to these features, a method that allows to obtain a concentrate containing a significant amount of man-made and natural organic matter in which a significant proportion of concentrated noble metals.

The proposed method is to use the three hydrocyclones successively decreasing conicity (10 °, 7 ° and 5 °) for separating solid material uniformly dispersed in a liquid medium (brines) and represented by coarse and fine fractions of sludge and floatable material presented natural and technogenic organic matter.

The results, which are obtained by this method are in the most complete separation of the two phases of a solid material (sediment and floated parts) of slurry, but with a residual salt content of not more than 15%. The insoluble residue is a concentrate containing the compound of Au, Pt, Pd, mineral basis which are (descending) anhydrite, dolomite, quartz, feldspar, chlorite, hydromicas, hydroxides of Fe, sulfides organic substance represented by organic natural and man-made.

For bulk concentrate should:

1. ensure that the process of selection BUT (concentrate) by a hydrocyclone from clay-salt residues (sludge);

2. process get hydrocyclone salt concentrate with 15% or less for further pyrometallurgical processing.

Method is as follows

The slimes are passed through the hydrocyclone 10 °, where a sand nozzle takes the largest part of the sedimentary fraction of NO, and go into the sink, small fraction of the sedimentary fraction BUT, float material (organic) and salt solution. Drain 10 ° hydrocyclone goes to a second power supply (7 °) hydrocyclone, where the nozzle leaves a sand fines NO sedimentary part and the drain - floatable material (organic) and salt solution. Draining the second (7 °) the hydrocyclone is directed to the third power (5 °) of the hydrocyclone, where the nozzle leaves a sand salt solution and the drain - floated material and salt residues. Then, the first and second concentrates together with flotation hydrocyclones HO part obtained through the drain of the third hydrocyclone to form a concentrate which is to pyrometallurgical processing. The salt content is limited to 15% th barrier accumulates during the three hydrocyclone stages. In case of excess salt in the concentrate, each arranged perechistka hydrocyclone stage which consists in setting at each stage, respectively, a pair of hydrocyclones 10, 7 and 5 °. In this case the concentrate obtained through a sand nozzle of the first 10 ° th hydrocyclone is directed to the power of the 2nd st 10 ° hydro-cyclone, where a sand nozzle leaves concentrate perechischennoy large fraction IO, then guided into the receptacle to concentrate and plums both 10 ° hydro-cyclones are combined and sent to the power of the first 7 ° hydro-cyclone strength. Concentrate from Pieskowa nozzle of the first 7 ° hydro-cyclone strength is in the power of the second solution of 7 ° hydro-cyclone, where a sand nozzle goes perechischenny concentrate small residual fraction IO, then guided into the receptacle to concentrate and plum both 7 ° -x hydrocyclones are in the power of the first 5 ° hydro-cyclone strength. The material that goes into a sand nozzle of the first 5 ° hydro-cyclone strength, the power is sent to the second solution of 5 ° hydro-cyclone, where a sand nozzle comes out of salt solution purified by flotation of the BUT, leave residues in the sink material float BUT, are combined with a drain of the first 5 ° solution of hydro-cyclone and sent to the receptacle for the final formation of the bulk concentrate.

The need to create such a complex scheme due to the fact that the processing of sludge flotation of potash ores unlike halurgical sludge processing potassium-magnesium ore contains large amounts of natural and man-made organic, which concentrated a large proportion of the precious metals.

As used in the bulk concentrate from clay-salt residue of plants processing potassium-magnesium ore and rock salt, represents slimes halurgical and flotation plant with a pulp density of 1.3 g / cm 3, and the ratio S: L = 1: 3. The difference was the high content of organic matter, represented the natural organic and man-made (amines and polyacrylamide). Moreover, if the content of organic matter (total) did not exceed 1.5%, it reached 3% in our example, the total content of organic matter, which is related to the inclusion in the process of redistribution halurgy flotation waste production to factories halurgical - cyclone dust, where the content of organic matter traditionally high (5%). This led to the use of hydro-cyclone with a cone angle of 5 ° in the third stage hydrocyclone for the complete separation of floated fraction BUT natural and man-made organic. Turning it into a chain resulted in the most complete extraction of the concentrate was floated but the presentation organics with losses of 5% and provided a total loss of not more than 7% but with a common factor of 0.9.

CLAIM

1. A method of producing bulk concentrate for extraction of precious metals, comprising a three-stage hydrocyclone slurry concentrate allocation, and on hydrocyclone receives sludge with a ratio S: L = 1: 3, characterized in that hydrocycloning is carried out sequentially through 10-, 5- and 7- degree cyclones and bulk concentrate from clay-salt residue of plants processing potassium-magnesium ore and rock salt for the recovery of precious metals, is a mixture of sediment and float material, which are not soluble in water, sludge residue discharge of the second hydro-cyclone in the form of a salt solution and flotation of the water-insoluble residue sludge to natural and man-made organic substances fed to the third stage hydrocyclone with the release on it through the drain nozzle floated fraction with natural and man-made organic and subsequent association with concentrates of the first and second hydrocyclones and formation of the bulk concentrate, while through a sand packing salt solution, which tails enrichment process.

2. A method according to claim 1, characterized in that the sludges are processed halurgical and flotation plants with high content of natural and man-made organic.

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Publication date 14.03.2007gg