SU973644A1 - Method for processing pyrrhotine concentrate - Google Patents

Description

The invention of otositsp to metallurgy, in particular, to hydrometallurches, the processing of sulphide iron containing non-ferrous metals.

The known method of autoclave oxidative leaching of sulfide polymetallic materials at a temperature above the melting point of sulfur in the presence of surfactants of the class of polysaccharides, for example sulfite liquor in an amount of 0.2-1.5 wt.% To the initial solid C1.

However, extraction of non-ferrous metals during flotation concentrate with further processing of the oxidized pulp does not exceed 92%, the cost of this surfactant is relatively high, which leads to an increase in the process.

The most conspicuous to the invention according to the technical essence and the achieved Moiviy result is the pyrrhotite concentrate processing method, which includes oxidative autoclave leaching of sulphides at the melting point of the melting point sulfur in the presence of surfactant, the dessication of colored metal sulfate sulphides followed by fluorine sulfide;

The disadvantages of this method are the use of scarce and expensive reagents as surfactants, as well as the insufficiently high recovery of non-ferrous metals into a sulfur sulfide concentrate.

The purpose of the invention is to reduce the cost of reagents and increase the recovery of valuable components in the flotation concentrate.

The goal is achieved by the fact that according to the method of processing pyrrhotite concentrate, which includes the oxidative autoclave extraction of sulfides at a temperature-ire above the melting point of sulfur in the presence of a surfactant, the precipitation of nonferrous metal sulfides followed by flotation

20 by the release of sulfur and sulphides into the flotation concentrate, gas condensate or products of its distillation are used as a surfactant during leaching.

25

The flow rate of gas condensate or products of its distillation is 0.5-1.5% of the weight of the initial solid pulp.

In order to increase extraction

30 non-ferrous metals in the solution during leaching and improving the quality of the flotation concentrate, gas condensate or products of its distillation are used in a mixture with bitumen in the ratio 4: 115: 1. Gas condensate, products of its distillation and their mixtures with bitumen can be used in the form of an aqueous emulsion with the addition of a foaming agent in the amount of 0.5-5.0 wt.% To the specified surfactant. The addition of a foaming agent increases the stability of the emulsion and prevents its separation. The surfactant given in the form of an aqueous emulsion is evenly distributed in the pulp of the initial pyrodinic concentrate, which means that it can be economically consumed without deteriorating the process performance. Example 1. (By a known method). As a raw material, water pulp of pyrrhotite concentrate of the following composition is used in solid,% Nickel 3.36 Copper 1.1 Iron -51.6 Sulfur 30.0 W: T1.5 Surfactant TsIATIM-208 are added to the pulp Amount 0, 5 wt.% To solid. The mixture is loaded into a 3.0 l autoclave with mechanical agitation and a temperature control system. Leaching of the pyrrhotite concentrate was carried out at 125-130 ° C and a partial pressure of oxygen of 9 atm for 1.5 hours. At the end of the indicated time, the autoclave was cooled and the leaching pulp (pH 1.27) was discharged. A sample is taken for chemical analysis. Then, in the oxidized pulp containing elemental sulfur after leaching, the precipitation of nonferrous metal sulphides is carried out by adding iron powder (Pe етet55) to the pulp in an amount of 1.8 to the stoichiometric one. The precipitation is carried out at 80-90 ° C in an open reactor with mechanical stirring for 1.0 hour. After precipitation, the pH of the pulp is 4.1. Next, it is subjected to flotation, adding a blowing agent T-66 and a collector butyl aeroflot in quantities of 6, 0 and 300 g per ton, respectively, of the original pyrrhotite feedstock. During the flotation process (duration about 40 minutes), water is added to maintain the required level in the flotation machine. The products of flotation (pulp of sulfurous sulfide concentrate and pulp of tailings) are collected separately, subjected to volume, weight measurements and chemical analysis. Based on the results, the process balance is calculated. The results of the experiment are presented in table. one.

Example 2, Source product, sequence of operations, operation modes, reagents and their costs are similar to Example 1. As a surfactant for leaching, gas condensate is set in an amount of 0.8% by weight to the solid initial pulp. Gas condensate is used (OST 51: 58-79). Characteristic

gas condensate: density 0.781 g / cm3, cetane number 29-34, initial boiling point + 72 s, final boiling point, pour point -70 ° C, refractive index 1.435, molecular weight 118.

The results of the experiment in Tasl. 2. Example 3. The conditions of the experiment are similar to example 2. The leaching of surfactant gas condensate is set in the amount of 1.5 wt.% To the original solid product. The results of the experiment in the table. 3. Example 4. The conditions of the experiment are similar to those of example 2. The gas condensate consumption for leaching is 0.5 wt.% To the initial solid product. The results of the experiment in Table 3. Example 5i The conditions of the experiment are similar to examples 2-4. As a surfactant in leaching, the product of gas condensate distillation fraction with a boiling point above 125 ° C is used. The latter is obtained by distillation from a gas condensate of light fractions which constitute 40% by volume in the starting product. The consumption of surfactant on leaching of 0.8 wt.% To the original solid in the pulp. The results of the experiment in the table. 3. Example 6. The conditions of the experiment are similar to those of example 5. As a surfactant in leaching, a product of distillation of gas condensate is used - a fraction with a boiling point above 170 ° C, which is obtained after distillation of 70% by volume from the original condensate. The consumption of surfactant on leaching of 0.5 wt.% To the original solid in the pulp. The results in the table. 3. Example 7. The conditions of the experiment are similar to examples 2-4. As a surfactant in leaching, a mixture of gas condensate with bitumen (viscous oil road bitumen GOST 2224576) is used, which is obtained by preliminary dissolving 1 weight.h. bitumen in 4-h weight.h. condensate. The consumption of surfactant on leaching of 0.8 wt.% To the original solid in the pulp. The results of the experiment in the table. 3 Example 8. The conditions of the experiment are similar to example 7. In a mixture of gas condensate with bitumen, used as a surfactant for extraction, treating a condensate to bitumen ratio of 15: 1. The consumption of surfactant on leaching of 0.8 wt.% To the original solid pulp of pyrrhotite condensate. The results of the experiment in the table. 3. PREMIUM 9. Experimental conditions are analogous to examples 7-8. As a surfactant in leaching, a mixture is used (E shares of gas condensate (boiling point above 125 ° C) with bitumen in a weight ratio of 7: 1, respectively. The mixture is prepared by first dissolving bitumen on the specified gas condensate days. Surfactant leaching consumption 0.6% by weight to the initial solid in the pulp. The results of the experiment are given in Table 3. EXAMPLE 10 The conditions of the experiment are the same as in Example 3. An aqueous emulsion of gas condensate is used as a surfactant, and in the process of preparation of a gas condensate emulsion. Doy is added in an amount of 4.8% by weight to the condensate (solid soap roof 790-69). The addition of soap S with the specified amount provides a stable emulsion. The flow rate of gas condensate in the form of an emulsion is 0.5% by leaching. Example 11. Experimental conditions are the same as Example 10. As a surfactant in leaching, an emulsion of gas condensate with water with an additive is used to increase the durability of the detergent emulsion (OST 6-15933-75) in an amount of 0.84 wt. % condensate. The consumption of surfactants (gas condensate) for leaching of 0.5 wt.% To the solid initial pulp. The results of the experiment in the table. 3. Example 12, Conditions of experience are similar to examples 10-11. On leaching set emulsion of gas condensate with water with the addition of a foam type software (GOST 6948/70) in an amount of 3.6 wt.% To the gas condensate. The flow rate of gas condensate in the form of an emulsion is the same as in experiments 10-11. The results of the experiment in the table. 3, Example 13. The conditions of the experiment are similar to those of example 12. A water emulsion with a PO of non-pure gas condensate and a mixture of the latter with bitumen in a 4: 1 weight ratio is set for leaching. The addition of a foaming agent in the process of preparing an emulsion of 0.55 wt.% To the surfactant is a mixture of condensate with bitumen. The surfactant consumption for leaching of 0.4 wt.% To the solid initial pulp of pyrrhotite condensate. Example 14. Experimental conditions are analogous to example 13. As a surfactant specified in the form of an aqueous emulsion, a fraction of gas condensate with a boiling point was mixed with bitumen in the correlation of the components, respectively, 7: 1, for leaching. The consumption of surfactant on leaching of 0.3 wt.% To the solid source of pyrrhotite concentrate. The results of the experiment in the table. 3

.Tab na 3

Claims (2)

3. Clean gas condensate 1.5 72.156.6 4.7. 4-Pure gas condensate 0.5 62.247.4 3.9 5. Fraction of gas condensate with a TeNmepaiypofl boiling output 0.8 72.3 57.0 4.5 6FRACTION gas condensate with a boiling point. And Vike 1700s0.5 72.0 56.8 4.4 7Gas condensate and mixtures with Vital in the ratio 4il 0.8 78.9 60.3 4.3 8 Gas condensate mixed with bitumen - a ratio of 15: 1 0.8 73.3 59.1 4.3 9Fractions of gas condensate with a boiling point) above 125 ° С in a mixture with bitumen in the ratio of 7: 1 .0.6 78.2 60.4 4.5 10Gas condensate in the form of an aqueous emulsion with addition of sludge in the amount of 70.3 55.8 4.2 4.8 wt.% to condensate 0.5 It Gas condensate in the form of WAVE emulsin with added-. which synthetic detergent in the amount of 0.5 71.1 55.6 4.3 0.84 wt.% to the condensate 12 gas con; knsat in the form of a water mixture with the addition of a frother OP in the amount of 3.6 wt.% 0.5 69.8 54.4 4, to the gas: condensate. 13Gas condensate mixed with bitumen in a ratio of 4il, given in the form of WATER emulsions with, with the addition of a frother in the amount of 0.4 77.2 60.3 4, 0.55 weight. to surfactant 14paxtpM gas coidsat with a boiling point of 125 ° C in a mixture with bitumen t ratio of 7ll, specified in the form of ONE emulsion with the addition of OP in the amount of 78.0 60.4 4 0.55 vAC.% to the surfactant when applying for leaching gas condensate less than 0.5 wt.% to the original solid pulp, for example 0.4%, the extraction of valuable components in the concentrate at the flotation stage is lower than in the known method 65 21.9 95.1 96.4 17, 2 72.6 1.88 19.2 90.4 88.7 20.4 72.0 2.63 22.1 95.2 96.1 15.3 71.4 1.94 22.0 95.0 95 , 2 15.1 71.5 1.85 21.8 95.3 95.913.272.0 1.26 21.9 95.1 96.0 14.4 71.1 1.63 22.0 95.2 95.9 13.7 71.3 1.35 20.0 94.9 95.0 15.4 71.9 1.83 19.8 94.7 95.1 15.6 72.1 1.86 9.5 94.3 95.3 15, at 71, at 1.91 2.0 95.5. 5.8 12.8 72.6 1.21 1.8 95.1 96.3 12.6 72.8 1.1 (where the surfactant is TsIATIM). The consumption of condensate and products of its distillation above 1.5 wt.% Is inexpedient, since the extraction of valuable components in the concentrate at the flotation stage remains constant, and the consumption of reagent increases. When using gas condensate as a surfactant or products of its sublimation in a mixture with bentum, it is impractical to use less than four weight units of condensate or distillation product, for example 3 units of weight, per unit weight unit, since a greater increase in extraction of non-ferrous metals into the no longer achievable and the quality of flotation concentrate no longer increases. An increase in the weight quantity of gas condensate or products of its distillation in a mixture with bitumen more than 15 times to bitumen does not change the efficiency of the reagent — pure gas. condensate or its acceleration products. When using a surfactant in the form of a water emulsion with the addition of a foaming agent, the amount of the latter in the emulsion should not be less than 0.5 wt.% And more than 5.0 wt.% To the surfactant. Otherwise, the emulsion resistance decreases dramatically, which leads to a decrease in the effect of saving the surfactant and the consumption of the latter increases. The method does not require the introduction of additional equipment and costs, reduces the cost of reagents in the head of the technology. And increases the extraction of valuable components in the target product - serosulfide concentrate by 2-3%. An additional advantage of the method is to solve the problem of utilizing the byproduct gas of the gas. Claim 1. Method for processing pyrrhotite concentrate, including oxidizing agent; sulphide autoclave leaching at a temperature above the melting point of sulfur in the presence of a surfactant; reducing the cost of reagents and increasing the extraction of valuable components in the flotation concentrate, as a surfactant in leaching using hectares Zovy condensate or products of its distillation. 2. The method according to Claim 1, of which it is necessary that the flow rate of gas condensate or products of its distillation is 0.5-1.5% of the weight of the initial solid in the pulp. 3. The method according to claim 1, characterized in that, in order to increase the recovery of non-ferrous metals into the solution during leaching and to improve the quality of the flotation concentrate, gas-. New condensate or products of its distillation are used in a mixture with bitumen in the correlation {4: 1) - (15: 1). 4. The method according to Claim 1, which is based on the fact that, in order to reduce the consumption of gas condensate or distillation products, as well as their mixture with bitumen, the surfactant is used in the form of an aqueous emulsion with the addition of a blowing agent in the amount of 0.5-5.0% of VBS and surfactant. Sources of information taken into consideration during examination 1, USSR Author's Certificate No. 508551, cl. From 22 to 3/00, 1976. 2. Colored metals, 1980, No. 9, p. 27-30.