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Method for recovering iron from gold concentrate

A recovery method and technology of gold concentrate, applied in the field of recovery of iron in gold concentrate, can solve problems such as soil and water pollution, endangering ecological balance and human health, complex components, etc., and achieve the effect of comprehensive recycling

Active Publication Date: 2010-10-20
山东黄金冶炼有限公司
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Problems solved by technology

Due to the complex composition of cinders, the utilization rate in our country is only about one-third, and a large amount of cinders are still piled in the open air, polluting soil and water, directly or indirectly endangering ecological balance and human health

Method used

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  • Method for recovering iron from gold concentrate
  • Method for recovering iron from gold concentrate

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Embodiment Construction

[0014] Below in conjunction with embodiment further illustrate the present invention.

[0015] The first step, grinding: Use KW-1250 vertical mill to grind the gold concentrate to 37 microns, accounting for more than 95%.

[0016] The second step, mixed flotation: the gold concentrate is divided into high-sulfur gold concentrate (S: above 47%) and low-sulfur gold concentrate (S: below 7%) by mixed flotation. The flotation agents and their dosages are: collector butyl xanthate 50g / t, collector butylamine black 50g / t, foaming agent methyl isobutyl carbinol (MIBC) 36g / t; the flotation process is : One roughing, two beneficiation, two sweeping, and finally achieve high-sulfur gold concentrate and low-sulfur gold concentrate each accounting for 50%.

[0017] The third step, separation flotation: the high-sulfur gold concentrate obtained in the second step is subjected to separation flotation by separation flotation; flotation reagents and their dosage: collector isopentyl xanthate...

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Abstract

The invention provides a method for recovering iron from a gold concentrate, comprising the following steps: dividing the gold concentrate into a high sulfur part (the sulfur content is more than 47%) and a low sulfur part (the sulfur content is lower than 7%) by a floatation method, wherein the yield of each part is 50%; through separation and flotation, separating the high sulfur part with 47% of sulfur content to obtain the gold concentrate with high contents of gold, copper, lead and zinc and yield of 5% and obtain the gold concentrate in which the part with more than 48.5% of sulfur content accounts for 45%; and performing gold extraction on the part by cyaniding, calcinating cyanided dreg to obtain above 60% iron powder. By using the technology, more than 80% of iron from the cyanided dreg can be recovered; pyrite in the gold concentrate can be firstly purified to enable the purity of the pyrite to be above 90%, and then the pyrite is calcinated to prepare aid and wast heat is used for generating power; and the calcinated dreg has iron content above 60% so as to be served as a raw material for ironmaking in a steel mill, thus realizing comprehensive reclamation.

Description

(1) Technical field [0001] The invention relates to a method for recovering iron from gold concentrate. (two), background technology [0002] At present, the cyanide slag after cyanidation of gold concentrate is mainly sold to chemical plants as sulfur concentrate (sulfur: about 25%), and roasted to produce sulfuric acid. The main components of the roasted slag are silicate, magnetite, red Minerals such as iron ore, the total iron content of this part of roasting slag accounts for about 33%, and cannot be used as iron-making raw materials. A small number of units recover iron from the reduced magnetite through magnetic separation, but this recovery only accounts for about 5% of the entire cyanide slag, most of which are used as flux for cement production and admixtures for construction projects. Due to the complex composition of cinders, the utilization rate in our country is only about one-third, and a large amount of cinders are still piled in the open air, polluting soil...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B1/02
CPCY02P10/20
Inventor 王德煜姚福善刘瑞强朱建鹏马涌王国利
Owner 山东黄金冶炼有限公司
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