Method of obtaining collective concentrate

FIELD: chemistry.

SUBSTANCE: method includes enrichment of sludge by hydrocycloning, filtration of an obtained pre-concentrate, which represents a mixture of large fractions of a sedimentary and a part of a floated material, dehydration, drying, granulation, drying. To hydrocycloning supplied is sludge with a ratio of S:L=1:2. Hydrocycloning is carried out in 4 stages. Discharges of each stage of hydrocycloning are combined in the pre-concentrate. An initial pulp is supplied to the first hydrocyclone at a temperature of 50÷70°C and under pressure of 2.5÷4 atm. A ratio of sand muzzle to the draining one in all the hydrocyclones constitutes 0.5÷0.66:1. Drying of granules is realised at a temperature up to 150°C to avoid loss of noble metals in sublimates.

EFFECT: maximal extraction of noble metals from the obtained concentrate.

4 cl, 5 tbl

 

The invention relates to methods for collective concentrate for extraction of precious metals from clay-salt waste manufacturers potassium-magnesium ore and rock salt, and can be used for the separation of two or more components, in the form of solid particles in a different "phase" condition, such as sediment and floatated particles, where the liquid phase can be represented by two or more components, which differ in solubility or density.

Known methods of dehydration of the material close to the invention of technical entity (Reference enrichment of ores. Special and auxiliary processes. M.: Nedra, 1983, p.77, 78, 96-98, 100, 102, 108, 109. Abramov A.A., S.B. Leonov processing of ores of non-ferrous metals. M.: Nedra, 1991, p.35,37), which is a dehydration of the material varying in size classifiers, filtering centrifuges, vacuum filters, press filters, drying ovens and other These methods are designed for maximum separation of the liquid phase from the solid material of a particular size. However, these methods are not designed individually for the separation of the liquid phase "sludge" because of the complexity and peculiarities of the material and particle size distribution of the material. Since more than 70% of the material have a particle size less than 0.1 mm and is m ore than 20% of the grain size less than 0,044 mm, applying filtering centrifuges, providing residual moisture less than 5% when the particle size of the material more than 1 mm, in our case, part of the material will go into the filtrate and along with it will be lost of the useful component. For these same reasons, cannot be applied press filters. Directly applying the drying ovens is impossible without preliminary dehydration. So for dewatering sludge after centrifugation required complex methods of dehydration carried out by several devices.

A known method of obtaining a concentrate of clay-salt waste manufacturers potassium-magnesium ore and rock salt for the recovery of precious metal (BM), (patent No. 2256504, publ. 2005.07.20), including at least two-stage of gidrotsiklonirovaniya sludge with the release of the concentrate, and the gidrotsiklonirovaniya carried out in two or three stages, and concentrate hydrocyclone is a solid phase - insoluble residue (N.O.) sludge.

At gidrotsiklonirovaniya come sludge with respect to T:W=1:3, on the stage of the first gidrotsiklonirovaniya produce a concentrate in the form of a large fraction of the concentration and the drain of the first hydrocyclone in the form of a small fraction of the concentration and salt solution, the drain of the first hydrocyclone Rasulova to T:W=1:8 and send to peredishki the second is the stage gidrotsiklonirovaniya with the release of the concentrate in the form of a residual fraction concentration sludge and drain of the second hydrocyclone in the form of a salt solution and subsequent Association dedicated hydrocycloning concentrates, in the case of large residual concentration in a drain of the second hydrocyclone perform additional third stage gidrotsiklonirovaniya, thus processed sludge gallerycheck and flotation plants.

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

Also known is a method of obtaining collective concentrate from clay-salt waste processing plants potassium-magnesium ore and rock salt to patent RU No. 2284221 (publ. 27.09.2006), which includes the gidrotsiklonirovaniya carried out in three stages, bulk concentrate hydrocyclones (pulp) is a solid phase, consisting of sedimentary and floatated part, representing the water-insoluble residue (N.O.) sludge and liquid phase. The pulp has a ratio of T:W=1:1 (liquid and solid phases) and the residual salt content of K and Na is not more than 15%.

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

Closest to the claimed invention is a method for collective concentrate on what I recovery of noble metals from the article A.I. Anosova "To the question about the configuration of processing units for processing sludge additional devices", published in 2007 in the proceedings of the annual scientific session of the Mining Institute, Ural branch of RAS on the results of research in 2006, the three-stage Method includes the gidrotsiklonirovaniya sludge emitting concentrate and bulk concentrate obtained after gidrotsiklonirovaniya, is a mixture of sedimentary and floatated material T:W 1:1, which are dehydrated dried, granularit, then dried.

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

The invention solves the problem most complete extraction of precious metals from clay-salt waste manufacturers potassium-magnesium ore and rock salt.

The technical result is the creation of a method of waste processing enterprises, processing K-Mg ore and rock salt with a maximum recovery of precious metals from concentrate, namely: a selection from the pulp, after gidrotsiklonirovaniya, preconcentrate, with the yield of the target product (United collective concentrate) 29% (table 5) from the original pulp (raspolovennyj original sludge), containing 60÷70% Sul the ATA calcium from the source. Removing the BM in the concentrate may be 60÷80% of the original. The chloride content is 15÷20%.

To achieve the technical result in the production method of collective concentrate enrichment of clay-salt waste (sludge) to extract the BM, including the enrichment of the sludge hydrocycloning, filtering the received preconcentrate, representing a mix of large fractions of sedimentary and part floatated material, dewatering, drying, granulation, drying, gidrotsiklonirovaniya produced in stage 4, and the gidrotsiklonirovaniya come sludge with respect to T:W=1:2, and unloading each stage gidrotsiklonirovaniya are preconcentrate, the pulp goes to the first hydrocyclone to a temperature of 50÷70°C and under pressure of 2.5÷4 bar and the ratio of sand nozzle to drain all the hydrocyclones is 0.5÷0,66:1, drying the granules occurs at temperatures up to 150°C, to avoid leaving BM in sublimates.

Distinctive features of the process from the above known closest to him, is that the gidrotsiklonirovaniya produced in stage 4, and the gidrotsiklonirovaniya come sludge with respect to T:W=1:2, and unloading each stage gidrotsiklonirovaniya are preconcentrate, the pulp goes to the first hydrocyclone to a temperature of 50÷70 is With the pressure of 2,5÷4 bar, and the ratio of sand nozzle to drain all the hydrocyclones is 0.5÷0,66:1, drying the granules occurs at temperatures up to 150°C, to avoid leaving BM in sublimates.

Due to the presence of these characteristics in the way yield of useful product (preconcentrate) 29% (table 5) and high recovery of precious metals, the final product of the recycling process - concentrate enrichment (granulate) has a moisture content of 0.5÷3%, sulphate of calcium (the main hub of organic matter and BM) up to 70% from the original and chloride of potassium or sodium 15÷20%.

The method is as follows. Sludge resultatives water to the ratio between solid and liquid phases T:W=1:2 for maximum transfer of solid salt phase into the solution. Next, the pulp goes on gidrotsiklonirovaniya. The gidrotsiklonirovaniya cooked pulp is carried out in 4 stages 10, 7, 5, and 5-degree hydrocyclones. The gidrotsiklonirovaniya produce consistently through 10 -, 7 -, and 5-degree hydrocyclones, cleaners concentrate enrichment at each stage through the cleaner cell (duplicate) hydrocyclone and collective preconcentrate only unloading of hydrocyclones. At the first stage gidrotsiklonirovaniya pulp is fed at a temperature of 50÷70°C for priority planting KCl, due to different temperature the coefficients of crystallization of KCl and NaCl, under pressure 2,5÷4 bar. After gidrotsiklonirovaniya provided for the elimination of excess water by filtration on filter presses for further granulation. In the process of granulation and drying in a rotary kiln is a product with a salt content of 20±5% and grain sizes ⌀5÷8 mm, for further pyro - and hydrometallurgical processing.

Table 1 shows the results gidrotsiklonirovaniya raspolojennoe sludge upon receipt of preconcentrate.

Technical essence concentrating mostly sulphates of calcium in preconcentrate average of 29% (table 5) from raspolojennoe sludge, based on the identified characteristics of the granulometric composition of water-insoluble residue (N.O.) sludge distribution in it calcium sulphate, organic matter and BM. These features consisted of the following:

1. In large fractions the CONCENTRATION of the slurry (-1+0.25 mm) accumulated up to 20% of the material CONCENTRATION of the sludge and up to 60% calcium sulphate and 60-80% BM;

2. In the fractions (-0,044 mm) accumulated up to 80% of the material CONCENTRATION of the sludge.

The dependence of BM extract from particle size distribution and mineral composition the CONCENTRATION of sludge are shown in table 2.

Further studies of the sludge showed that despite similar composition of sylvinite ore, features of pretreatment on separate plants can affect the composition and mineral structure DETERMINATION was going well (table 3) even more clearly.

Installed dependence has led to the possibility of separating the coarse fraction CONCENTRATION of sludge containing up to 60% of calcium sulphate way gidrotsiklonirovaniya.

Further preconcentrate enrichment is filtered in filter presses with temperature preconcentrate 50÷70% for priority planting KCl, due to different temperature coefficients of crystallization of KCl and NaCl, granulation, drying and transmitted to the pyro - and hydrometallurgical processing, and the diameter is 6 to 8 mm, and a moisture content of 0.5÷3%.

The results of x-ray quantitative phase analysis (RCFA) products gidrotsiklonirovaniya shown in table 4.

Calculation of the yield of the target product and anhydride shown in table 5.

The authors found that the maximum recovery of BM from clay-salt waste manufacturers potassium-magnesium ore and rock salt, you raspolirovyvayut sludge with water to the ratio between solid and liquid phases T:W=1:2; and that priority planting KCl, due to different temperature coefficients of crystallization of KCl and NaCl, occurs when filtering in filter presses with temperature preconcentrate 50÷70%.

The method according to the claimed invention lies in the maximum extraction of sulfate component CONCENTRATION slurries with natural and anthropogenic organics, concentrating in the baie BM, in concentrate enrichment (granular) material, the most suitable for further pyro - and hydrometallurgical processing.

Table 1
StageHydrocycloneØ nozzle (mmPressure, ATM
α°PurposeAttachments
I10MainThe loading.83,0
Plums12
Cleaner cellThe loading.82,5
Plums12
II7MainThe loading.53,0
Plums
Cleaner cellThe loading.53,5
Plums10
III5MainThe loading.44,0
Plums8
Cleaner cellThe loading.44,0
Plums8
IV5MainThe loading.44,0
Plums8
Cleaner cellThe loading.43,5
Plums8
Volume and product output, l (%)
The original sludge at T 50÷70°C2466 (100%)
Concentrate721 (29%)
Waste1702 (69%)
Note: the ratio of the diameters nasdaw unloading: loading 0,5÷0,66:1;
α is the angle of taper of the hydrocyclone.

Table 3
Classes sizeOutput %Mineral composition of the sample (approx. weight. %)
gypsumanhydritequartzKSdolomitechloritemicapyrite
Sample OLTP-24 linkage 5044,
+111,3296111 1
-1+0,52,729811
0.5 to+0,251,759811
-0,25+0,10,749811
-0,1+0,0710,24251081242111
-0,071+0,045 1,7912823339322
-0,04581,445243424435

Table 4
Products hydrocyclone simulationMineral composition, %
AnhydritequartzCPS*dolomitehalitesylvitehematitechloritemica
1.11911181211231 22
1.3 Br4513161427111
1.4 Br31131713516122
1.5 Br31131610817122
1.5 Br/28151813714122
1.5 Br//2615 2013912122
1.23313181551412
1.5 Ac//1381811252221
1.5 BS//15916112026112
* CPS - potassium feldspar

Legend: 1.1 - source raspolovennyj sludge

1.2 - collective preconcentrate

As//+BS// waste gidrotsiklonirovaniya

1.3 Br - unloading 2nd 10-degree (n is ratestogo) hydrocyclone

1.4 Br - unloading 2nd 7-degree (perekisnogo) hydrocyclone

1.5 Br - unloading 2nd 5-degree (perekisnogo) hydrocyclone

1.5 Br/- 1-I dry cleaners

1.5 Br// - 2-I dry cleaners

Table 5
Products gidrotsiklonirovaniyaWeight, kgThe number of anhydrite, kg
1.12466468,54
1.2721237,93
As//+BS//1702203,28
Output of the target product and the output of anhydrite in the target product, %
The yield of the target product29,23
The output of anhydrite in the target product50,78

1. The method of obtaining collective concentrate enrichment of clay-salt waste in the form of sludge for the recovery of precious metals, including gidrotsiklonirovaniya slurry, filtering the received preconcentrate, to depict allaudio a mixture of large fractions of sedimentary and part floatated material, dehydration, drying, granulation and drying of granules, characterized in that the gidrotsiklonirovaniya come sludge in the form of a pulp with respect to T:W=1:2, and the gidrotsiklonirovaniya produced in stage 4 and unloading each stage gidrotsiklonirovaniya unite in preconcentrate, with the first stage on the first hydrocyclone slurry served with a temperature of 50÷70°C.

2. The method according to claim 1, characterized in that the pulp is served on the first hydrocyclone under pressure 2,5÷4 bar.

3. The method according to claim 1, characterized in that the ratio of sand nozzle to drain all the hydrocyclones is 0.5÷0,66:1.

4. The method according to claim 1, characterized in that the drying of the granules is carried out at temperatures up to 150°C.



 

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1 ex

FIELD: mining.

SUBSTANCE: method of determining gold mineralisation of rock formation comprises multistage crushing of raw material to fractions of the size not greater than 0.5 mm, the subsequent classification of the resulting material and its processing with bromoform. Classification is carried out by sedimentation with the separation of the material class of -0.05+0.02 mm of water discharges, followed by drying and sieving the remaining material with the separation of the fraction -0.5 +0.1 mm and -0.1+0.05 mm, treating each of the resulting classes with 10-30% alcohol solution of bromoform. Sedimentation is carried out once with the accumulation of sediment for 15-20 min and repeatedly for 3-5 minutes, followed by the integration of the water discharges obtained during it.

EFFECT: increase in reliability of determining of gold areas and determining areas of gold mineralisation.

2 cl, 1 ex

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