CN102628103A - Method for enriching valuable metal from mine tailing and smelting slag by fire method - Google Patents

Abstract

The invention discloses a method for enriching valuable metal from mine tailing and smelting slag by a fire method, comprising the following steps of: mixing iron slag containing gold and silver, mine tailing, smelting slag and a binder material; by solidification of lime in the binder, briquetting the above mixed materials under the pressure of 5000-8000KN for moulding, standing at normal temperature for 5-10 days, carrying out oxidation reaction on the materials under high pressure, air-drying part of moisture and slaking agglomerate; pouring the agglomerate and coke into a shaft furnace, letting copper and sulfur combine into copper sulphide at 1250-1350 DEG C and in the atmosphere of weak oxidation, melting copper sulphide and ferric sulfide together to generate sulfonium, enriching gold, silver, copper and part of precious metals by sulfonium, using them as the raw materials for copper smelting and recovery of its precious metals, and letting other volatile valuable metals of lead, bismuth and antimony enter into flue dust for enrichment. The method provided by the invention has advantages of simple technology and low cost, and can be used to realize simultaneous recovery and comprehensive utilization of some mine tailing and smelting slag.

Description

With the method for pyrogenic process from mine tailing and melting waste slag concentration of valuable metals

Technical field

The invention belongs to non-ferrous metal exploitation mine tailing and melting waste slag valuable metal enriching and recovering technical field, relate to a kind of with the method for pyrogenic process from mine tailing and melting waste slag concentration of valuable metals.

Background technology

At present, in some smelteries or mine tailing, can produce a kind of argentiferous lead bronze bismuth tin antimony material, because grade is low, be worth for a short time, it is a technology difficult problem that wherein metal is comprehensively reclaimed, and also is an environmental protection difficult problem.Present existing smeltery and exploitation enterprise just discard or temporary the stacking these materials, and environment is caused very big pressure, have also wasted limited resources simultaneously.

Summary of the invention

The object of the present invention is to provide a kind of the present invention to provide that a kind of technology is simple, cost is low, and can some mine tailing and melting waste slag be reclaimed simultaneously, comprehensive utilization with the method for pyrogenic process from mine tailing and melting waste slag concentration of valuable metals.

Present method comprises the steps:

1, mixing of materials: contain gold and silver scum, mine tailing and metallurgical slag and sticker and mix, control compound sulfur-bearing adds lime less than 5%, and moisture is 5-15%;

2, mix the group of pressure: the solidification of utilizing lime in the sticker; At normal temperatures, press down a moulding at pressure 5000-8000KN, placed at normal temperatures 5-10 days with fully automatic hydroform machine said mixture material; Under high pressure carry out oxidizing reaction Deng material; Behind the air-dry part moisture, make the agglomerate slaking, intensity does not get final product not pulverize at 1 meter eminence freely falling body;

3, make the sulphur melting: agglomerate and coke are dropped in the shaft furnace under 1250-1350 ℃; In weak oxide atmosphere, copper and sulphur are combined into cupric sulfide, and cupric sulfide and iron sulphide melt the generation sulfonium together altogether; Sulfonium is with gold, silver and bronze and part concentration of precious metal; As the raw material that copper is smelted and precious metal reclaims, the plumbous bismuth antimony of other easy evaporable valuable metal gets into the flue dust enrichment, and slag then generates calcium ferrosilicon slag system; Make cement raw material, plumbous bismuth tin is then by volatilizing and enriching raw material as the comprehensive recovery of plumbous bismuth tin in flue dust.

Wherein: the gold and silver scum is the sulfate cinder that contains gold and silver and valuable metal thereof, and nonferrous smelting comes out contains scum;

Mine tailing and metallurgical slag are the silver smelting slag, lead bronze metallurgical slag etc., and mine tailing has the mine tailing of cupric iron and other valuable metal, perhaps the low grade oxidation ore of difficult choosing;

Sticker is a lime, cement, clay, the mixture of iron powder.

The invention has the beneficial effects as follows:

1, the simultaneously whole enriching and recovering of multiple valuable metal in mine tailing and the melting waste slag, the slag of smelting output has improved iron level, send the cement mill as raw materials for production, has thoroughly solved the slag environmental issue.

2, copper gold and silver enrichment 5-15 doubly obtains the sulphur matte, and plumbous bismuth tin antimony enrichment 5-15 doubly obtains flue dust.

3, whole process valuable metal direct yield is high, and the recovery of copper gold and silver is to 60-85%, and the recovery of plumbous bismuth tin antimony is to 50-75%, and the slag that goes out of use obtains maximum using.

Description of drawings:

Fig. 1 is a concrete process flow sheet of the present invention.

Specific embodiment according to technical process shown in the drawings;

1, mixing of materials: contain gold and silver scum, mine tailing and metallurgical slag and sticker and mix, control compound sulfur-bearing adds lime less than 5%, and moisture is 5-15%;

2, mix the group of pressure: the solidification of utilizing lime in the sticker; At normal temperatures, press down a moulding at pressure 5000-8000KN, placed at normal temperatures 5-10 days with fully automatic hydroform machine said mixture material; Under high pressure carry out oxidizing reaction Deng material; Behind the air-dry part moisture, make the agglomerate slaking, intensity does not get final product not pulverize at 1 meter eminence freely falling body;

3, make the sulphur melting: agglomerate and coke are dropped in the shaft furnace under 1250-1350 ℃; In weak oxide atmosphere, copper and sulphur are combined into cupric sulfide, and cupric sulfide and iron sulphide melt the generation sulfonium together altogether; Sulfonium is with gold, silver and bronze and part concentration of precious metal; As the raw material that copper is smelted and precious metal reclaims, the plumbous bismuth antimony of other easy evaporable valuable metal gets into the flue dust enrichment, and slag then generates calcium ferrosilicon slag system; Make cement raw material, plumbous bismuth tin is then by volatilizing and enriching raw material as the comprehensive recovery of plumbous bismuth tin in flue dust.

Wherein: the gold and silver scum is the sulfate cinder that contains gold and silver and valuable metal thereof, and nonferrous smelting comes out contains scum;

Mine tailing and metallurgical slag are the silver smelting slag, lead bronze metallurgical slag etc., and mine tailing has the mine tailing of cupric iron and other valuable metal, perhaps the low grade oxidation ore of difficult choosing;

Sticker is a lime, cement, clay, the mixture of iron powder.

The main chemical reactions formula is:

C+O→CO ₂

C+O→CO

CO+O ₂→CO ₂

MeO+CO→CO ₂+Me

Cu ₂O+FeS→CuS+FeO

Me+O ₂→MeO

Wherein n has different variations according to the valency difference.

After the present invention's processing, contain gold and silver lead bronze bismuth tin antimony mine tailing and melting waste slag enriching and recovering valuable metal simultaneously, copper gold and silver enrichment 5-15 doubly obtains the sulphur matte; Plumbous bismuth tin antimony enrichment 5-15 doubly obtains flue dust; The grade of valuable metal reaches commercial requirement, and discarded originally valuable metal is recycled again, and slag is also as the raw materials for production in cement mill; Turn waste into wealth, good economic environmental benefit is arranged.Material component that it obtains such as following table;

The Chemical Composition of various materials (%)

Draw from last table data, gold, silver and bronze all are enriched in the sulfonium, have obtained the copper raw material of commercial usefulness from the depleted slag; Gold, silver and bronze all enrichment about 10 times, plumbous bismuth also is enriched in the flue dust, is the good raw material that reclaims plumbous bismuth; And slag has become the dark ace-high raw materials for production in cement mill, and whole metallurgical slag has obtained sufficient recovery, and environment protection is had very big benefit; To resource also good use, for recycling economy and environment protection provide a good idea.

Claims (1)

1. one kind with the method for pyrogenic process from mine tailing and melting waste slag concentration of valuable metals, it is characterized in that may further comprise the steps:

1), mixing of materials: material adds the vulcanizing agent that copper content is equal to, 1-10% sticker, the mixing of 5-10% lime;

2), normal temperature is pressed group: at normal temperatures; Press down a moulding with fully automatic hydroform machine said mixture material at pressure 5000-8000KN, placed at normal temperatures 5-10 days, wait material under high pressure to carry out oxidizing reaction; Make the agglomerate slaking, intensity does not get final product not pulverize at 1 meter eminence freely falling body;

3), matte stove melting: agglomerate and coke are dropped in the shaft furnace in 1250-1350 ℃ of following melting, and the output slag type is: FeO20-30%, SiO ₂25-35%, CaO15-25%.Plumbous bismuth silver melting obtains alloy, and the sulphur in copper and the iron sulphide generates sulfonium makes copper obtain separation and concentration, and the indium volatilizing and enriching is in flue dust.

Wherein: vulcanizing agent is an iron sulphide, the metallic sulfide of lead sulfide;

Material is the lead bullion scum silica frost, the mixture of blister copper blowing slag;

Sticker is a lime, cement, clay, the mixture of iron powder.