Integrated utilization technique for cyanidation gold-extracted waste slag

A process method and waste residue technology, which is applied in the field of comprehensive utilization of cyanidation gold extraction waste residue, can solve problems such as environmental pollution, waste of resources, low quality of iron concentrate, etc.

Inactive Publication Date: 2007-11-28
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although a part of iron concentrate can be recovered through magnetic separation, the recovery rate is very low, only 5%-6%, and the grade of iron concentrate is between 55% and 59%, and impurities such as sulfur exceed the standard, and the quality of iron concentrate is obviously low
These cinders are generally used for stockpiling or as cement additives. Whether they are stockpiled or used as cement additives, they will cause environmental pollution and waste of resources.

Method used

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  • Integrated utilization technique for cyanidation gold-extracted waste slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. One-step copper separation: add water to the cyanidation gold extraction tailings to adjust the pulp concentration to 30%, adjust the pulp acidity to PH=6 with sulfuric acid, and mix collectors according to the ratio of butyl xanthate: butylamine black medicine = 2:1, Add 100g / t into the flotation machine, and add 2# oil foaming agent at 45g / t to carry out closed-circuit flotation. After primary roughing, secondary closed-circuit sweeping, and secondary closed-circuit selection, copper, lead, Zinc, gold, silver, etc. are enriched, from Cu 0.38%, Pb 0.52%, Zn 0.42%, Au 1.00g / t, Ag 10.00g / t to Cu 5.42%, Pb4.64%, Zn 6.15 %, Au 1.30g / t, Ag 126.4g / t, and treated separately;

[0020] 2. Two-step sulfur selection: Add water to the material after copper removal in the first step to adjust the pulp concentration to 30%, adjust the pulp acidity to PH=1.5 with sulfuric acid, add butyl ammonium black drug collector at 170g / t, and add at 60g / t 2# oil foaming agent, closed-circui...

Embodiment 2

[0027] 1. One-step copper separation: add water to the cyanidation gold extraction tailings to adjust the pulp concentration to 33%, adjust the pulp acidity to PH=6 with sulfuric acid, and mix collectors according to the ratio of butyl xanthate: butylamine black medicine = 1.8:1, Add 120g / t to the flotation machine, and add 2# oil foaming agent at 40g / t to carry out closed-circuit flotation. After primary roughing, secondary closed-circuit sweeping, and secondary closed-circuit selection, copper, lead, Zinc, gold, silver, etc. are enriched, from Cu 0.36%, Pb 0.31%, Zn 0.37%, Au 1.00g / t, Ag 9.60g / t to Cu 6.5%, Pb 4.71%, Zn 5.76% , Au 1.60g / t, Ag 141.60g / t, and treated separately;

[0028] 2. Two-step sulfur selection: add water to the material after copper removal in the first step to adjust the pulp concentration to 35%, adjust the pulp acidity to PH=2 with sulfuric acid, add butyl ammonium black drug collector at 150g / t, and add at 80g / t 2# oil foaming agent, closed-circuit ...

Embodiment 3

[0035] 1. One-step copper separation: add water to the cyanidation gold extraction tailings to adjust the pulp concentration to 35%, adjust the pulp acidity to PH=6 with sulfuric acid, and mix collectors according to the ratio of butyl xanthate: butylamine black medicine = 2.2:1, Add 80g / t into the flotation machine, and add 2# oil foaming agent at 42g / t to carry out closed-circuit flotation. After primary roughing, secondary closed-circuit sweeping, and secondary closed-circuit selection, copper, lead, Zinc, gold, silver, etc. are enriched, from Cu 0.32%, Pb 0.44%, Zn 0.49%, Au 0.90g / t, Ag 20.00g / t to Cu 6.94%, Pb 5.12%, Zn 8.52% , Au 1.10g / t, Ag 183.00g / t, and treated separately;

[0036] 2. Two-step sulfur selection: add water to the material after copper removal in the first step to adjust the pulp concentration to 33%, adjust the pulp acidity to PH=2.5 with sulfuric acid, add butyl ammonium black drug collector at 200g / t, and add at 64g / t 2# oil foaming agent, closed-cir...

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Abstract

The invention relates to a method of complex utilization of the waste residue that from gold extraction with cyanidation. This invention belongs to the field of metallurgy and chemical technology. Firstly, the waste residue that from gold extraction with cyanidation is pretreated with acid. The floatation process is adopted here. The first step is to concentrate cuprum, plumbum, zincum and argentum; Secondly, collect 47%-52% of the high-grade sulfur and concentrate gold and argentums; Then roast the high-grade sulfur concentrate, the gas is utilized to produce acid, and the waste heat is utilized to produce electricity, and the waste residue is utilized to extract gold with cvanidation. After washing by water, the leavings which contains 62%-68% iron can be used as iron concentrate. Finally, produce slag brick with the refuse. The technology which could reclaim the elements, such as Fe, S, Cu, Pb, Zn, Au, Ag, complex utilizes the waste residue that from gold extraction with cyanidation. The invention takes full advantage of resource. The effect of integrated utilization of resource and the economic benefit are enhanced and the environmental pollution is lessened by this way.

Description

1. Technical field [0001] The invention relates to a process method for comprehensive utilization of cyanidation gold extraction waste residue, which belongs to the technical field of metallurgy and chemical industry. 2. Background technology [0002] Cyanide gold extraction waste residue is the product of gold-bearing sulfide ore after gold extraction by cyanide method. The main components are iron sulfide, silicon dioxide, and a small amount of sulfides and oxides of copper, lead, zinc, etc., and also contain trace amounts of gold, silver and other precious metals. Among them: silicon dioxide content SiO2: 35% - 40%, sulfur content S: 20% - 30%; copper, lead, zinc are respectively Cu: 0.10% - 0.60%, Pb: 0.10% - 0.50% , Zn: 0.10%--0.50%; gold and silver are Au: 0.5g / t-1.0g / t, Ag: 30g / t-40g / t. At present, the method of processing these cyanidation gold extraction waste residues is mainly based on the sulfur content in the waste residues, and adopts the method of stockpilin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/00C22B11/08C22B15/00C22B3/22C01B17/74C04B18/14F22B1/04
CPCY02P10/20Y02P20/129Y02W30/91
Inventor 王立新路玉国赵军王天星
Owner SHANDONG GUODA GOLD
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