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Method for recycling valuable metal from sulfur concentrate cinders

A technology of valuable metals and sulfur concentrates, applied in the field of beneficiation and metallurgy, can solve the problems of low added value of building materials, inability to use ironmaking raw materials, and waste of metal resources, so as to improve resource utilization, benefit ironmaking, and reduce The effect of production costs

Active Publication Date: 2014-05-21
ZHAOJIN MINING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The bottleneck of recycling sulfur concentrate slag containing gold, silver and other valuable elements is that the iron contained in it is not high in grade and cannot be used as raw material for ironmaking. Small, the added value of building materials is too low, and it is also a serious waste of valuable metal resources such as gold and silver

Method used

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  • Method for recycling valuable metal from sulfur concentrate cinders
  • Method for recycling valuable metal from sulfur concentrate cinders

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Add bentonite with 2% weight of slag and calcium chloride solution with a concentration of 35wt% to the sulfur concentrate slag in turn to form a mixture, and rub the mixture to make the slag of sulfur concentrate less than 200 mesh The mass percentage of particle size is greater than 80%; wherein, the amount of calcium chloride solid in the calcium chloride solution is 6% of the weight of sulfur concentrate slag;

[0048] (2) Spray water on the moistened mixture to make green granules, dry them, and roast the dried granules with natural gas at 1150°C for 1 hour to obtain granulated iron and flue gas; among them: the volatilization rate of Au is 93.26%, and the volatilization rate of Ag is 93.26%. The volatilization rate of Cu is 82.20%, the volatilization rate of Cu is 82.55%, the volatilization rate of Pb is 88.53%, the volatilization rate of Zn is 83.48%, and the content of Fe in granular iron is 60.46%;

[0049] (3) Wash the flue gas obtained in step (2) with 2w...

Embodiment 2

[0053] (1) Add bentonite with 4% weight of slag and calcium chloride solution with a concentration of 35wt% to the sulfur concentrate slag in order to form a mixture, and rub the mixture to make the slag of sulfur concentrate less than 200 mesh The mass percentage of particle size is greater than 80%; wherein, the amount of calcium chloride solid in the calcium chloride solution is 6% of the weight of sulfur concentrate slag;

[0054] (2) Spray water on the moistened mixture to make green granules, dry them, and roast the dried granules with natural gas at 1150°C for 1 hour to obtain granulated iron and flue gas; among them: the volatilization rate of Au is 93.28%, and the volatilization rate of Ag is 93.28%. The volatilization rate of Cu is 82.22%, the volatilization rate of Cu is 81.55%, the volatilization rate of Pb is 88.55%, the volatilization rate of Zn is 82.48%, and the content of Fe in granular iron is 60.48%;

[0055] (3) Wash the flue gas obtained in step (2) with 2...

Embodiment 3

[0059] (1) Add bentonite with 5% weight of slag and calcium chloride solution with a concentration of 35wt% to the sulfur concentrate slag in turn to form a mixture, and rub the mixture to make the slag of sulfur concentrate less than 200 mesh The mass percentage of particle size is greater than 80%; wherein, the amount of calcium chloride solid in the calcium chloride solution is 6% of the weight of sulfur concentrate slag;

[0060] (2) Spray water on the moistened mixture to make green granules, dry them, and roast the dried granules with natural gas at 1150°C for 1 hour to obtain granular iron and flue gas; among them: the volatilization rate of Au is 94.24%, and the volatilization rate of Ag is 94.24%. The volatilization rate of Cu is 82.25%, the volatilization rate of Cu is 81.55%, the volatilization rate of Pb is 88.57%, the volatilization rate of Zn is 83.46%, and the content of Fe in granular iron is 60.45%;

[0061] (3) Wash the flue gas obtained in step (2) with 2wt%...

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Abstract

The invention belongs to the technical field of mineral separation and metallurgy and particularly relates to a method for recycling valuable metal from sulfur concentrate cinders. The method comprises the following steps: sequentially adding bentonite and a calcium chloride solution into the sulfur concentrate cinders to form a mixed material; wetly grinding the mixed material; spraying water into the wetly-grinded mixed material to generate raw grains, and drying; roasting the dried grains by using natural gas to obtain iron grains and smoke; washing the smoke and filtering to obtain PbSO4 sediment, AgCl sediment and a single substance Au; adding iron blocks into a filtering solution to displace the single substances Cu, Au and Ag; filtering again and adding a sodium hydrosulfide solution into the filtering solution; adjusting the pH by using lime milk; filtering to obtain lead; and adding the lime milk into the filtering solution to adjust the pH, and filtering and drying to obtain Zn(OH)2. The method provided by the invention is simple in process and is efficient and environmental friendly; the requirements on raw materials are low and the recycling rate of the valuable metal is high; the valuable metal in the sulfur concentrate cinders is recycled by using a low production cost.

Description

technical field [0001] The invention belongs to the technical field of beneficiation and metallurgy, in particular to a method for recovering valuable metals from sulfur concentrate slag. Background technique [0002] Cyanide tailings are terminal polymetallic wastes containing acidic, alkaline, highly toxic cyanide ions and heavy metal components produced in the cyanidation gold extraction process in the gold smelting process. The composition is shown in the following table: [0003] [0004] [Note]: Units of Au and Ag are g / t. [0005] The cyanidation tailings are enriched with sulfur through flotation, and the sulfur grade is increased from 25% to about 48%, and then roasted to produce acid. The sulfur concentrate slag produced during the roasting process contains more than 62% iron, which can be used as a smelter for iron and steel factories. Iron raw material, iron fine powder, the contents of valuable metals gold and silver are about 2 g / ton and 30 g / ton respective...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B13/00C22B11/00C22B15/00C22B19/30
CPCY02P10/20
Inventor 王立新赵军魏晋栾东武牛莆方王慧
Owner ZHAOJIN MINING
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