Ore selecting method for lowering content of magnesium oxide in Nelson reselection precious metal concentrates

A mineral processing method and precious metal technology, applied in flotation, solid separation, etc., can solve problems such as pollution, unsatisfactory test indicators, and high energy consumption, and achieve the effects of simple process flow, convenient purchase, and improved recovery rate

Inactive Publication Date: 2018-04-24
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research and treatment results of the magnesium reduction of the gravity-selected precious metal concentrate by pyromethod and hydrometallurgy technology show that the treatment process not only consumes a lot of energy, but also causes pollution, and the test indicators are not ideal.

Method used

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  • Ore selecting method for lowering content of magnesium oxide in Nelson reselection precious metal concentrates
  • Ore selecting method for lowering content of magnesium oxide in Nelson reselection precious metal concentrates
  • Ore selecting method for lowering content of magnesium oxide in Nelson reselection precious metal concentrates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The Nelson re-selection precious metal concentrate produced by the Nelson system in the first dressing workshop of a certain factory is processed as follows:

[0014] A. One-stage grinding: Grinding the Nelson gravity-selected precious metal concentrate through a ball mill. During the grinding, the ball mill discharges ore and is classified by the cyclone, and the sand is returned to the ball mill, and the overflow is fed into the mixing tank. The particle size of the overflow product is - 0.074mm accounts for 60-75%, copper sulfate is added during the grinding process and the amount of copper sulfate added is 80g / t Nelson gravity-selected precious metal concentrate;

[0015] B. One-stage open-circuit flotation: After grinding, add flotation agents to the Nelson gravity-selected precious metal concentrate in the mixing tank. The flotation agents are butyl xanthate, foaming agent and ammonium butyl ammonium. The J-622 produced by Baiyin Pharmaceutical Factory of Metallur...

Embodiment 2

[0021] The Nelson gravity separation precious metal concentrate produced by the Nelson system in the second beneficiation workshop of a factory is processed as follows:

[0022] A. One-stage grinding: Grinding the Nelson gravity-selected precious metal concentrate through a ball mill. During the grinding, the ball mill discharges ore and is classified by the cyclone, and the sand is returned to the ball mill, and the overflow is fed into the mixing tank. The particle size of the overflow product is - 0.074mm accounts for 60-75%, copper sulfate is added during the grinding process and the amount of copper sulfate added is 90g / t Nelson gravity-selected precious metal concentrate;

[0023] B. One-stage open-circuit flotation: After grinding, add flotation agents to the Nelson gravity-selected precious metal concentrate in the mixing tank. The flotation agents are butyl xanthate, foaming agent and ammonium butyl ammonium. The J-622 produced by Baiyin Pharmaceutical Factory of Meta...

Embodiment 3

[0029] The Nelson re-separation precious metal concentrate produced by the Nelson system in the third beneficiation workshop of a factory is processed as follows:

[0030] A. One-stage grinding: Grinding the Nelson gravity-selected precious metal concentrate through a ball mill. During the grinding, the ball mill discharges ore and is classified by the cyclone, and the sand is returned to the ball mill, and the overflow is fed into the mixing tank. The particle size of the overflow product is - 0.074mm accounts for 60-75%, copper sulfate is added during the grinding process and the amount of copper sulfate added is 100g / t Nelson gravity-selected precious metal concentrate;

[0031] B. One-stage open-circuit flotation: After grinding, add flotation agents to the Nelson gravity-selected precious metal concentrate in the mixing tank. The flotation agents are butyl xanthate, foaming agent and ammonium butyl ammonium. The J-622 produced by Baiyin Pharmaceutical Factory of Metallurg...

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Abstract

The invention discloses an ore selecting method for lowering the content of magnesium oxide in Nelson reselection precious metal concentrates. The ore selecting method comprises the following steps that the Nelson reselection precious metal concentrates are ground into minus 0.074 mm by 60%-75% through a ball grinder, copper sulfate is added in the ore grinding process, and the adding amount of the copper sulfate is 80-100g per ton of the Nelson reselection precious metal concentrates; and flotation reagents are added into the Nelson reselection precious metal concentrates after ore grinding,the flotation concentration is controlled to be 28%-35%, rapid flotation is conducted on ore pulp under the condition of high-rotation-speed stirring, and concentrates with the content of the magnesium oxide lower than or equal to 6.6% can be obtained after flotation. By means of the ore selecting method for lowering the content of the magnesium oxide in the Nelson reselection precious metal concentrates, valuable metal is recycled by conducting ore grinding and flotation technologies on the Nelson reselection precious metal concentrates, the recycling rate of the precious metal is greatly increased, the recycling rate of gold and the recycling rate of platinum can reach 97%-99% and 91%-99% correspondingly, about 90% of the magnesium oxide can be removed, and the content of the magnesium oxide in the Nelson reselection precious metal concentrates can be lowered within 6.6%. According to the ore selecting method for lowering the content of the magnesium oxide in the Nelson reselection precious metal concentrates, devices involved in the whole process are few, the technological process is simple, the processing cost is greatly reduced, and industrial production on the spot is easy toimplement.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a mineral processing method for reducing the content of magnesium oxide in Nelson gravity separation precious metal concentrate. Background technique [0002] The nickel-copper sulfide ore processed by the concentrator is rich in precious metals such as gold, platinum, and palladium. Using the Nelson concentrator, some precious metals can be enriched and recovered in advance to obtain Nelson re-selected precious metal concentrates rich in gold, platinum, and palladium. During the subsequent smelting process of Nelson gravity separation precious metal concentrate, due to the high content of magnesium oxide in the concentrate (the content of magnesium oxide in the concentrate is between 14% and 20%), and the melting point of magnesium oxide is 2852°C, magnesium oxide If the content is too high, there will be problems such as high energy consumption and large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/012B03B1/00B03B1/04B03D101/02B03D101/04B03D103/02
CPCB03B1/00B03B1/04B03D1/012B03D2201/02B03D2201/04B03D2203/025
Inventor 罗春华高红苏晓晖蒲银春李莉娜方湘天王春燕
Owner JINCHUAN GROUP LIMITED
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