阅读说明：本技术 一种提高氧化铜酸浸渣铜回收率的选矿方法 (Beneficiation method for improving copper recovery rate of copper oxide acid leaching residue ) 是由 郭艳华 苗琳璐 杨俊龙 郭海宁 包玺琳 王志丰 王李鹏 苗培 李振宇 柏亚林 张 于 2020-04-28 设计创作，主要内容包括：本发明一种提高氧化铜酸浸渣铜回收率的选矿方法,首先进行磨矿,磨矿后矿浆调到适宜浓度,添加调整剂弱酸性条件下,添加组合捕收剂回收硫化铜,浮选尾矿加入活化剂、长碳链捕收剂、起泡剂进行回收氧化铜,经三次精选获得铜精矿,一次扫选产出尾矿,中矿顺序返回上一作业。该方法工艺流程简单,有效提高了酸浸渣中铜的回收率,实现了二次资源的综合回收。(The invention relates to a beneficiation method for improving the recovery rate of copper in acid leaching residue of copper oxide. The method has simple process flow, effectively improves the recovery rate of copper in the acid leaching residue, and realizes the comprehensive recovery of secondary resources.)

1. The beneficiation method for improving the recovery rate of copper in the copper oxide acid leaching residue is characterized by comprising the following steps:

step 1: grinding the raw ore until the grinding concentration is 50-60% and the content of the ground ore with fineness less than 0.074mm is 80-90%;

step 2: flotation of sulfide ores, namely adjusting the ore pulp obtained in the step 1 to the concentration of 25-45%, adding 3000-5000 g/t of a regulator, adjusting the pH to 5.5-7, adding a copper sulfide combined collecting agent with the use amount of 50-70 g/t, and performing two times of rough concentration to obtain copper rough concentrate I and rough tailings;

and step 3: flotation of oxidized ore, adding 40-80 g/t of ethylenediamine phosphate and 20-50 g/t of titanium tetrachloride into the roughed tailings obtained in the step 2, fully activating, adding 100-150 g/t of C7-C9 alkyl hydroxamic acid and 100-150 g/t of butyl xanthate, and adding 2^#50-70 g/t of oil, and obtaining copper crude extract through one-time roughingOre II, carrying out primary scavenging to produce tailings;

and 4, step 4: and (3) combining the copper rough concentrate I and the copper rough concentrate II obtained in the steps 2 and 3, and concentrating for three times to obtain the final copper concentrate.

2. The beneficiation method for improving the copper recovery rate of the copper oxide acid leaching residue according to claim 1, characterized in that: the copper sulfide combined collector in the step 2 is prepared from the following raw materials in parts by weight: 5-7 parts of ethyl bisnigrum; 0.5-1 parts of methylene bisthionitrogen; z-2000.5 to 1.

3. The beneficiation method for improving the copper recovery rate of the copper oxide acid leaching residue according to claim 2, characterized in that: the copper sulfide combined collector is prepared from the following raw materials in parts by weight: ethyl bisnigrum 5; methylene bisthio nitrogen 0.5; z-2000.5.

4. The beneficiation method for improving the copper recovery rate of the copper oxide acid leaching residue according to claim 2, characterized in that: the copper sulfide combined collector is prepared from the following raw materials in parts by weight: ethyl bisnigrum 7; methylene bisthionitrogen 1; z-2001.

5. The beneficiation method for improving the copper recovery rate of the copper oxide acid leaching residue according to claim 2, characterized in that: the copper sulfide combined collector is prepared from the following raw materials in parts by weight: ethyl bisnigrum 6; methylene bisthio nitrogen 0.7; z-2000.7.

6. The ore dressing method for improving the copper recovery rate of the copper oxide acid leaching residue according to claim 1, which is characterized by comprising the following steps: and (3) adjusting the pH value to 6 in the step (2), and adding a copper sulfide combined collecting agent with the dosage of 60 g/t.

7. The ore dressing method for improving the copper recovery rate of the copper oxide acid leaching residue according to claim 1, which is characterized by comprising the following steps: 60g/t of ethylenediamine phosphate and 35g/t of titanium tetrachloride are added in the step 3.

8. The ore dressing method for improving the copper recovery rate of the copper oxide acid leaching residue according to claim 1, which is characterized by comprising the following steps: C7-C9 alkyl hydroxamic acid 130g/t and butyl xanthate 130g/t, 2 are added in the step 3^#Oil 60 g/t.

9. The ore dressing method for improving the copper recovery rate of the copper oxide acid leaching residue according to claim 1, which is characterized by comprising the following steps: the C7-C9 alkyl hydroxamic acid is one or a combination of heptane hydroxamic acid, octane hydroxamic acid or nonane hydroxamic acid.

Technical Field

The invention belongs to the technical field of mineral processing, and particularly relates to a beneficiation method for improving the recovery rate of copper in copper oxide acid leaching residues.

Background

In copper ore resources in China, copper oxide ores also occupy an important position, and besides the oxidation zone on the upper part of most of copper sulfide ore deposits, the copper oxide ores also have independent copper oxide ore deposits with huge reserves. When the copper oxide ore is only floated, the copper is difficult to recover. For copper oxide ores with high oxidation rate and high binding rate, copper is usually recovered by adopting an acid leaching-displacement method, so that a better effect is achieved. Copper sulphide ore with a certain content is usually contained in the copper oxide acid leaching residue, and the part of copper sulphide in the acid leaching process does not react with acid and enters the residue. Part of copper sulfide and copper oxide difficult to leach are remained in the copper oxide acid leaching residue, and in order to fully utilize secondary resources, the copper in the acid leaching residue is recovered. Because a passivation film is generated on the surface of the copper sulfide ore after acid leaching, the copper sulfide ore is difficult to recover by adopting a conventional flotation reagent.

Disclosure of Invention

The invention aims to provide a beneficiation method for improving the recovery rate of copper in copper oxide acid leaching residues, which solves the problem of low recovery rate under conventional flotation and realizes comprehensive recovery of secondary resources. The method has the advantages of simple process flow, strong adaptability, low production cost and convenient industrial popularization and application.

In order to achieve the aim, the invention provides a beneficiation method for improving the copper recovery rate of copper oxide acid leaching residues, which is characterized by comprising the following steps:

step 1: grinding the raw ore until the grinding concentration is 50-60% and the content of the ground ore with fineness less than 0.074mm is 80-90%;

step 2: flotation of sulfide ores, namely adjusting the ore pulp obtained in the step 1 to the concentration of 25-45%, adding 3000-5000 g/t of a regulator, adjusting the pH to 5.5-7, adding a copper sulfide combined collecting agent with the use amount of 50-70 g/t, and performing two times of rough concentration to obtain copper rough concentrate I and rough tailings;

and step 3: flotation of oxidized ore, adding 40-80 g/t of ethylenediamine phosphate and 20-50 g/t of titanium tetrachloride into the roughed tailings obtained in the step 2, fully activating, adding 100-150 g/t of C7-C9 alkyl hydroxamic acid and 100-150 g/t of butyl xanthate, and adding 2^#50-70 g/t of oil, performing primary roughing to obtain copper rough concentrate II, and performing primary scavenging to produce tailings;

and 4, step 4: and (3) combining the copper rough concentrate I and the copper rough concentrate II obtained in the steps 2 and 3, and concentrating for three times to obtain the final copper concentrate.

In the technical scheme of the beneficiation method for improving the copper recovery rate of the copper oxide acid leaching residue, the further preferable technical scheme is characterized in that:

1. the copper sulfide combined collector in the step 2 is prepared from the following raw materials in parts by weight: 5-7 parts of ethyl bisnigrum; 0.5-1 parts of methylene bisthionitrogen; z-2000.5-1;

2. the copper sulfide combined collector is prepared from the following raw materials in parts by weight: ethyl bisnigrum 5; methylene bisthio nitrogen 0.5; z-2000.5;

3. the copper sulfide combined collector is prepared from the following raw materials in parts by weight: ethyl bisnigrum 7; methylene bisthionitrogen 1; z-2001;

4. the copper sulfide combined collector is prepared from the following raw materials in parts by weight: ethyl bisnigrum 6; methylene bisthio nitrogen 0.7; z-2000.7;

5. adjusting the pH value to 6 in the step 2, and adding a copper sulfide combined collecting agent with the dosage of 60 g/t;

6. 60g/t of ethylenediamine phosphate and 35g/t of titanium tetrachloride are added in the step 3;

7. C7-C9 alkyl hydroxamic acid 130g/t and butyl xanthate 130g/t, 2 are added in the step 3^#Oil 60 g/t;

8. the C7-C9 alkyl hydroxamic acid is one or a combination of heptane hydroxamic acid, octane hydroxamic acid or nonane hydroxamic acid.

Compared with the prior art, the invention has the beneficial effects that: (1) under the weakly acidic condition, the combined collecting agent with stronger collecting capability is added, so that the copper sulfide in the acid leaching residue is effectively recovered. (2) And adding copper oxide activators such as ethylenediamine phosphate and titanium tetrachloride to fully activate the combined copper oxide in the acid leaching residue, and strongly collecting by using C7-C9 alkyl hydroxamic acid and butyl xanthate to effectively recover the refractory copper oxide in the acid leaching residue. The method has simple process flow, effectively improves the recovery rate of copper in the acid leaching residue, and realizes the comprehensive recovery of secondary resources.

Detailed Description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.