Preparation method and application of pyrite inhibitor

A technology of inhibitors and minerals, applied in the field of preparation of pyrite mineral inhibitors, can solve the problems of reducing the economic income of enterprises, loss, and failure to fully comprehensively recover resources, etc. Effect

Inactive Publication Date: 2011-02-16
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of flotation and separation of lead-sulfur minerals, a large amount of lime is generally used as an inhibitor of sulfur-iron minerals to suppress sulfur and lead, so that lead and sulfur are separated to obtain lead concentrate; but when the lead minerals contain gold or silver Therefore, lime cannot be used as

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] An example of a preparation method of a sulfur iron mineral inhibitor, comprising the following steps:

[0012] Add 14g p-nitroaniline to 120ml volume concentration of 20% sulfuric acid solution, heat to dissolve, then cool to 10°C in an ice bath, slowly add 25ml mass percent concentration of nitrous acid at this temperature of 25% Sodium solution affords product 1.

[0013] Prepare a solution of 12g 4,4'-diaminobenzenesulfonanilide and 15ml 1mol / L hydrochloric acid and cool it to 10°C in an ice bath, and couple with product 1 at pH9 to obtain product 2. Mix product 2 with 15ml 1mol / L The m-phenylenediamine is coupled under the condition of pH 10 to obtain a black water-soluble powder, which is the inhibitor.

Embodiment 2

[0015] Another example of the preparation method of the sulfur-iron mineral inhibitor of the present invention comprises the following steps: adding 16g of p-nitroaniline to 150ml volume concentration of 20% sulfuric acid solution, heating to dissolve it, and then placing it in an ice bath Cool to 10° C., slowly add 30 ml of 25% sodium nitrite solution at this temperature to obtain product 1.

[0016] Prepare a solution of 15g 4,4'-diaminobenzenesulfonanilide and 20ml 1mol / L hydrochloric acid and cool it to 10°C in an ice bath, and couple with product 1 at pH 10 to obtain product 2. Mix product 2 with 20ml 1mol / L The m-phenylenediamine is coupled under the condition of pH 11 to obtain a black water-soluble powder, which is the inhibitor.

Embodiment 3

[0018] This embodiment is an application example of the pyrite mineral inhibitor prepared in embodiment 1 or 2 in the flotation separation of lead and sulfur.

[0019] 1. Mineral raw materials:

[0020] The mineral raw material is gold-bearing lead sulfide ore, which contains 5.34% lead, 7.62% sulfur, and 1.56g / t gold. Phase analysis shows that the lead minerals mainly exist in the form of galena, and there is a small amount of wheel ore; the sulfur minerals are mainly in the form of yellow It exists in the form of iron ore, and a small amount of pyrrhotite, and gold is distributed in lead minerals.

[0021] 2. Chemical system and operating conditions: first grind the ore until the mineral monomers are dissociated, then use sodium carbonate to adjust the pH value of the slurry to 8-9, and conduct lead extraction according to the technological process of one roughing, two sweeping and three times of beneficiation. For sulfur separation, add 100g / t of the sulfur iron mineral in...

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PUM

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Abstract

The invention discloses a method for preparing a pyrite inhibitor, which comprises the following steps of: adding 14 to 16g of paranitroaniline into 120 to 150ml of 20 volume percent sulfuric acid solution, heating for dissolution, cooling to the temperature of 10 DEG C in an ice bath, and slowly adding 25 to 30 ml of 25 mass percent solution of sodium nitrite to prepare a product 1 at the temperature of 10 DEG C; preparing 12 to 15g of 4,4'-diamidobenzene sulphonamide and 15 to 20ml of 1mol/L hydrochloric acid into solution and cooling to the temperature of 10 DEG C in the ice bath, and coupling with the product 1 under the condition of a pH value of 9 to 10 so as to prepare a product 2; and coupling the product 2 with 15 to 20ml of 1mol/L m-phenylenediamine under the condition of a pH value of 9 to 10 so as to prepare black water-soluble powder, namely the pyrite inhibitor. The inhibitor has good inhibitory action on pyrite, no influence on golden or silver ore in lead ore, low consumption and no toxin or pollution.

Description

1. Technical field [0001] The invention relates to a preparation method of sulfur-iron mineral inhibitor, which is suitable for separating gold- or silver-containing lead-sulfur minerals from lead sulfide minerals to obtain gold- or silver-containing lead concentrate. 2. Background technology [0002] In the process of flotation and separation of lead-sulfur minerals, a large amount of lime is generally used as an inhibitor of sulfur-iron minerals to suppress sulfur and float lead, so that lead and sulfur are separated to obtain lead concentrate; but when the lead minerals contain gold or silver Therefore, lime cannot be used as sulfur-iron mineral inhibitor. This is because lime has an obvious inhibitory effect on gold or silver-containing minerals during the flotation process. Gold or silver is inevitably inhibited and lost in the tailings. This not only The resource has not been fully recovered, and the economic income of the enterprise has also been reduced. 3. Content...

Claims

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Application Information

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IPC IPC(8): B03D101/06B03D1/012B03B1/04C07C303/40C07C311/44B03D103/02
Inventor 魏宗武陈建华穆枭陈晔兰丽红
Owner GUANGXI UNIV
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