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A method for synergistic smelting of antimony-gold ore and gold-bearing pyrite slag to enrich valuable metals

A technology of pyrite slag and valuable metals, which is applied in the field of nonferrous metallurgy, can solve the problems of large output of slag, difficulty in comprehensive utilization, high processing cost, etc., to reduce smelting temperature, reduce consumption of primary resources, and operate simple effect

Active Publication Date: 2018-07-10
合肥龙之韵医药技术有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the current problems of large output of pyrite slag, difficulty in comprehensive utilization, high processing cost, and easy dispersion of gold in the smelting process of antimony gold ore, which leads to long recovery process. Method for enriching valuable metals through synergistic smelting of gold ore and gold-bearing pyrite slag

Method used

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  • A method for synergistic smelting of antimony-gold ore and gold-bearing pyrite slag to enrich valuable metals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The process flow chart is attached figure 1 shown. The main components of the gold-containing antimony concentrate as the test raw material in this example are (wt.%): Sb 37.21, Fe 13.27, S 30.60, Cu 0.085, Pb 0.18, Bi 0.026, As 0.034, SiO 2 7.14、Al 2 o 3 2.26, CaO 0.079, Au 56.6g / t; the composition (wt.%) of pyrite slag is: TFe 53.54, Cu0.24, Zn 0.17, Pb 0.08, MgO 0.49, CaO 1.82, SiO 2 10.41, Al 2 o 3 2.56, S 0.52, Au 5.08g / t, Ag 36.47g / t; the chemical composition (wt. %) of reducing agent coke powder is: C 84.56, S 2.79, SiO 2 5.17, CaO1.03, Al 2 o 3 3.94, MgO 0.42; the chemical composition (wt. %) of limestone is: SiO 2 1.20, CaO 53.07, Al 2 o 3 0.94, MgO 1.42.

[0046] S1. Weigh 200g of antimony-gold ore, 60g of pyrite slag, 40g of coke powder, 10g of sodium carbonate, and 20g of limestone of the above ingredients, and mix all the materials evenly and put them into a corundum crucible.

[0047] S2. Put the material into an electric furnace for vola...

Embodiment 2

[0049] Test raw materials, reagents and steps are the same as in Example 1.

[0050] S1. Weigh 200g of antimony-gold ore, 40g of pyrite slag, 20g of coke powder, 40g of sodium carbonate and 10g of limestone of the above components.

[0051] S2. After mixing all materials evenly, put them into a corundum crucible, put them into an electric furnace and volatilize and melt at 900°C for 4.0 hours.

[0052] After cooling, the products were separated to obtain 66.83g of crude antimony, 4.55g of antimony iron matte, 169.02g of slag, and 2.17g of dust were collected. According to chemical analysis, the contents of antimony in the above products were 97.40%, 46.02%, 2.01% and 72.33%, respectively, and the percentages of the total antimony in the raw materials were 92.03%, 1.86%, 3.01% and 3.15%, respectively. The contents of gold and silver in crude antimony are 168g / t and 32.20g / t respectively, and the calculated direct recovery rates of gold and silver are 89.06% and 84.33% respecti...

Embodiment 3

[0054] Test raw materials, reagents and steps are the same as in Example 1.

[0055] S1. Weigh 1000g of antimony-gold ore, 300g of pyrite slag, 300g of coke powder, 20g of sodium carbonate and 65g of limestone of the above components.

[0056] S2. After mixing all the materials evenly, put them into a corundum crucible, put them into an electric furnace and volatilize and melt at 1200°C for 1.0h.

[0057] After cooling, the products were separated to obtain 338.01 g of crude antimony, 20.71 g of antimony iron matte, 1005.65 g of slag, and 20.49 g of dust were collected. According to chemical analysis, the contents of antimony in the above products were 93.01%, 42.19%, 1.52% and 72.07%, respectively, and the percentages of the total antimony in the raw materials were 92.72%, 1.66%, 2.33% and 5.09%, respectively. The contents of gold and silver in crude antimony are 183g / t and 40.17g / t respectively, and the calculated direct recovery rates of gold and silver are 97.80% and 98.5...

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Abstract

The invention discloses a method of enriching valuable metals through collaborative smelting of a gold-antimony deposit and auriferous pyrite cinder. According to the method, in a smelting burdening process of the gold-antimony deposit, auriferous pyrite cinder replaces the original flux iron ore concentrate, the gold-antimony deposit and the auriferous pyrite cinder are subjected to collaborative smelting together, and a given amount of sodium carbonate is added for reducing a melting point of slag and improving the flowability of a melt, so that the smelting temperature is reduced effectively, the valuable metals like gold and silver in the auriferous pyrite cinder and antimony concentrate can be enriched in crude metallic antimony more, and the probability of oxygenation volatilization of antimony is reduced. The method has the outstanding advantages as follows: firstly, one-step smelting allows antimony to generate metallic antimony more, and the scattering problem of antimony in crude metal, flue gas and iron-antimony matte in the traditional technology is solved; secondly, difficult-to-treat solid waste, namely the auriferous pyrite cinder is used comprehensively, the iron ore concentrate is replaced, the consumption of primary resources is reduced and the industrial solid waste is treated collaboratively; finally, the valuable metals, namely gold and silver in the concentrate and the auriferous pyrite cinder are enriched and recovered, the energy consumption is reduced, and the collaborative smelting effects of comprehensive recovery, low carbon cleaning and production process centralization are exerted.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal metallurgy, and more specifically relates to a method for synergistic smelting of antimony-gold ore and gold-bearing pyrite slag to enrich valuable metals. Background technique [0002] The smelting of metal antimony and gold extracted from antimony-gold ore takes "blast furnace volatilization (smelting)-reduction smelting-precious antimony ash blowing" as the current main process. In this process, antimony gold ore, lime and hydraulic block are added, iron concentrate and coke are added to volatilize and smelt in a blast furnace, and antimony oxide powder, antimony iron matte and high gold and precious antimony are mainly produced, and gold is the most important of the three. There are distributions. The antimony oxygen powder and precious antimony are sent to reverberatory furnace for antimony smelting and fuming furnace blowing in turn, and finally gold is recovered through chlorinat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B5/02C22B30/02
CPCC22B5/02C22B30/02
Inventor 叶龙刚胡宇杰夏志美陈艺锋文平
Owner 合肥龙之韵医药技术有限公司
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