阅读说明：本技术 从含金锌铁多金属尾矿中回收金锌的选矿方法 (Beneficiation method for recovering gold and zinc from gold-zinc-iron-containing multi-metal tailings ) 是由 王振刚 史瑞鹏 马东林 于 2021-10-22 设计创作，主要内容包括：本发明公开了一种从含金锌铁多金属尾矿中回收金锌的选矿方法,选矿厂总尾矿浓缩池底流参数：浓度25-30%、-200目含量≥50%,浓缩池底流泵送至浮选系统,经添加浮选药剂：硫酸铜活化剂150g/t、WH-2活化剂30g/t、丁基黄药捕收剂40g/t、2号油起泡剂40g/t,并经搅拌混合后,浓缩池底流矿浆给入浮选柱进行粗选,粗选PH值7.5,粗选浮选时间为6分钟,粗选底流给入另一台浮选柱进行一次扫选,扫选浮选时间为4分钟,扫选药剂用量：丁基黄药捕收剂30g/t、2号油起泡剂25g/t；一次扫选精矿返回粗选,一次扫选底流排入原选矿厂尾矿库,粗选浮选柱精矿给入充气式浮选机进行精一、精二两段精选后再经过滤得到可供销售的含锌金精矿。(The invention discloses a beneficiation method for recovering gold and zinc from polymetallic tailings containing gold, zinc and iron, wherein the underflow parameters of a total tailing concentration pool of a beneficiation plant are as follows: the concentration is 25-30%, the content of minus 200 meshes is more than or equal to 50%, the underflow of the concentration tank is pumped to a flotation system, and the concentration is measured by adding flotation reagents: 150g/t of copper sulfate activator, 30g/t of WH-2 activator, 40g/t of butyl xanthate collector and 40g/t of No. 2 oil foaming agent, stirring and mixing, feeding the ore pulp of the bottom flow of the concentration tank into a flotation column for roughing, wherein the pH value of roughing is 7.5, the roughing flotation time is 6 minutes, feeding the bottom flow of the roughing into another flotation column for scavenging once, the scavenging flotation time is 4 minutes, and the dosage of scavenging agents is as follows: 30g/t of butyl xanthate collecting agent and 25g/t of No. 2 oil foaming agent; and returning the primary scavenging concentrate to roughing, discharging the primary scavenging underflow into a tailing pond of an original concentration plant, feeding the concentrate of the roughing flotation column into an inflatable flotation machine for primary and secondary refining, and filtering to obtain the zinc-containing gold concentrate for sale.)

1. A beneficiation method for recovering gold and zinc from gold-containing zinc-iron polymetallic tailings is characterized by comprising the following steps: the parameters of the bottom flow of the total tailing concentration pool of the concentrating mill: the concentration is 25-30%, the content of minus 200 meshes is more than or equal to 50%, the underflow of the concentration tank is pumped to a flotation system, and the concentration is measured by adding flotation reagents: 150g/t of copper sulfate activator, 30g/t of WH-2 activator, 40g/t of butyl xanthate collector and 40g/t of No. 2 oil foaming agent, stirring and mixing, feeding the ore pulp of the bottom flow of the concentration tank into a flotation column for roughing, wherein the pH value of roughing is 7.5, the roughing flotation time is 6 minutes, feeding the bottom flow of the roughing into another flotation column for scavenging once, the scavenging flotation time is 4 minutes, and the dosage of scavenging agents is as follows: 30g/t of butyl xanthate collecting agent and 25g/t of No. 2 oil foaming agent; and returning the primary scavenging concentrate to roughing, discharging the primary scavenging underflow into a tailing pond of an original concentration plant, feeding the concentrate of the roughing flotation column into an inflatable flotation machine for primary and secondary refining, and filtering to obtain the zinc-containing gold concentrate for sale.

Technical Field

The invention relates to a beneficiation method for recovering gold and zinc from polymetallic tailings containing gold, zinc and iron.

Background

After the research of mineral processing technology, the mineral composition, the embedding characteristics of important minerals, the monomer dissociation characteristics of important minerals and the occurrence characteristics of important minerals can be found out, and the optimal technological process can be selected after the research of mineral processing technology tests, so that the production technological method for processing the type of minerals is finally determined, and the design and construction of a mineral separation plant for processing the polymetallic ores containing the gold, the zinc and the iron are carried out according to the method. At present, the main production process flow of a concentrating mill for treating polymetallic ores containing gold, zinc and iron is as follows: the ore is prepared and processed through crushing, grinding and grading, so that basic monomer dissociation of useful minerals is achieved, namely, a process flow of 'gold and zinc separation and floatation separation again, zinc and sulfur mixed floatation separation again, magnetic separation of floatation tailings for recovering iron, and gold, zinc and iron grinding and re-separation' is adopted, and a concentrating mill constructed according to the process flow can produce qualified gold concentrate, zinc concentrate and iron concentrate which can be sold in the market. The inquiry shows that similar ore dressing plants do not have an example of on-line recycling of gold and zinc in the total tailings, and no existing process technology and production experience for processing the polymetallic ore dressing plants containing gold, zinc and iron to recycle the gold and zinc in the on-line total tailings can be used for reference.

Disclosure of Invention

The invention aims to provide a beneficiation method for recovering gold and zinc from gold-zinc-iron-containing polymetallic tailings, which is used for enriching and recovering gold and zinc metal in online total tailings of a beneficiation plant and producing zinc-containing gold concentrate for sale, so that the aim of recycling the gold and zinc metal in online tailings of the beneficiation plant for treating the gold-zinc-iron-containing polymetallic ores is finally realized, and the comprehensive utilization efficiency of mineral resources is improved.

The technical scheme adopted by the invention is as follows: a beneficiation method for recovering gold and zinc from multi-metal tailings containing gold, zinc and iron comprises the following steps of: the concentration is 25-30%, the content of minus 200 meshes is more than or equal to 50%, the underflow of the concentration tank is pumped to a flotation system, and the concentration is measured by adding flotation reagents: 150g/t of copper sulfate activator, 30g/t of WH-2 activator, 40g/t of butyl xanthate collector and 40g/t of No. 2 oil foaming agent, stirring and mixing, feeding the ore pulp of the bottom flow of the concentration tank into a flotation column for roughing, wherein the pH value of roughing is 7.5, the roughing flotation time is 6 minutes, feeding the bottom flow of the roughing into another flotation column for scavenging once, the scavenging flotation time is 4 minutes, and the dosage of scavenging agents is as follows: 30g/t of butyl xanthate collecting agent and 25g/t of No. 2 oil foaming agent; and returning the primary scavenging concentrate to roughing, discharging the primary scavenging underflow into a tailing pond of an original concentration plant, feeding the concentrate of the roughing flotation column into an inflatable flotation machine for primary and secondary refining, and filtering to obtain the zinc-containing gold concentrate for sale.

Through the experimental research of the total tailings of a dressing plant for treating polymetallic ores containing gold, zinc and iron in the last year, better grading indexes are finally obtained. Compared with the background technology, the invention mainly has the following beneficial effects: 1. the invention adopts the original flotation process that the total tailings are directly floated without grinding, the rough concentration is refined twice and middlings are returned sequentially, gold, zinc and the like can be floated and separated again, zinc and sulfur are mixed, the iron is recovered by magnetic separation of the flotation tailings, and the total tailings of a gold-zinc-iron regrinding and recleaning process ore dressing plant can produce zinc-containing gold concentrate for market sale. 2. The process provided by the invention can be used for recycling metals such as gold and zinc in the total tailings of the concentrating mill again, accords with the industrial policy of resource recycling advocated by the state, is mature and feasible in technology, can be used for effectively realizing comprehensive recycling of gold and zinc in the tailings of the concentrating mill, fully utilizes mineral resources, can also reduce the discharge amount of the tailings, and realizes win-win of economic benefits and social benefits. The technology can be adopted in all or part of similar mine enterprises at home and abroad.

Detailed Description

A beneficiation method for recovering gold and zinc from multi-metal tailings containing gold, zinc and iron comprises the following steps of: the concentration is 25-30%, the content of minus 200 meshes is more than or equal to 50%, the underflow of the concentration tank is pumped to a flotation system, and the concentration is measured by adding flotation reagents: 150g/t of copper sulfate activator, 30g/t of WH-2 activator, 40g/t of butyl xanthate collector and 40g/t of No. 2 oil foaming agent, stirring and mixing, feeding the ore pulp of the bottom flow of the concentration tank into a flotation column for roughing, wherein the pH value of roughing is 7.5, the roughing flotation time is 6 minutes, feeding the bottom flow of the roughing into another flotation column for scavenging once, the scavenging flotation time is 4 minutes, and the dosage of scavenging agents is as follows: 30g/t of butyl xanthate collecting agent and 25g/t of No. 2 oil foaming agent; and returning the primary scavenging concentrate to roughing, discharging the primary scavenging underflow into a tailing pond of an original concentration plant, feeding the concentrate of the roughing flotation column into an inflatable flotation machine for primary and secondary refining, and filtering to obtain the zinc-containing gold concentrate for sale.