CN104962949A - Method for removing copper in nickel electrolysis anode solution for purification - Google Patents

Method for removing copper in nickel electrolysis anode solution for purification Download PDF

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CN104962949A
CN104962949A CN201510310800.8A CN201510310800A CN104962949A CN 104962949 A CN104962949 A CN 104962949A CN 201510310800 A CN201510310800 A CN 201510310800A CN 104962949 A CN104962949 A CN 104962949A
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solution
nickel
copper
purity
anolyte
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郭勇
李亦婧
郑军福
赵重
卢建波
张晓明
章毅
冯建华
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Lanzhou Institute of Chemical Physics LICP of CAS
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Abstract

本发明公开了一种镍电解阳极液中净化除铜的方法,该方法为:在镍电解阳极液中加入还原剂调整镍电解阳极液的氧化还原电位,再用稀硫酸调整至溶液pH=1.3~4.0,溶液温度控制在50~70℃;在调整好的溶液中加入硫化钡粉末,50~70℃下搅拌反应20~50分钟,热过滤,收集滤液测定溶液中的铜含量。本发明具有净化效果显著、操作简单、运行成本低、绿色无毒等优点。The invention discloses a method for purifying and removing copper in the nickel electrolysis anolyte. The method comprises: adding a reducing agent to the nickel electrolysis anolyte to adjust the oxidation-reduction potential of the nickel electrolysis anolyte, and then using dilute sulfuric acid to adjust the pH of the solution to 1.3 ~4.0, the solution temperature is controlled at 50~70°C; add barium sulfide powder to the adjusted solution, stir and react at 50~70°C for 20~50 minutes, heat filter, collect the filtrate to measure the copper content in the solution. The invention has the advantages of remarkable purification effect, simple operation, low operating cost, green and non-toxic, and the like.

Description

一种镍电解阳极液中净化除铜的方法A method for purifying and removing copper in nickel electrolysis anolyte

技术领域 technical field

本发明涉及一种镍电解阳极液中净化除铜的方法。 The invention relates to a method for purifying and removing copper in nickel electrolysis anolyte.

背景技术 Background technique

金属镍在国民经济中占重要地位,是重要的战略性资源和用途非常广泛的金属单质材料。实际应用中,镍主要是以合金元素的形式用于特殊用途的零部件、精密仪器和军事装备材料中,是军事、机械、钢铁和航空材料中必不可少的添加剂。镍能够与其它金属材料按比例形成用途各异的金属合金材料,如镍基耐热材料、镍基耐蚀材料、镍基耐磨材料和镍基精密记忆材料。镍基合金材料被广泛的应用于航空、生物、化工等领域。广阔的镍市场对镍的纯度和质量都提出了严格要求。在镍的电解过程中,镍电解阳极液中的铜离子一旦流入阴极会先于镍在阴极析出,影响电镍质量,因此镍电解阳极液净化除铜成为保证电镍质量的关键。本发明主要针对镍电解阳极液的净化除铜,可作为一种除铜方法在电解镍生产或类似情况下使用,降低液体铜离子含量,保证电解镍的产品质量,具有实际的应用价值和很大的市场潜力。 Nickel metal plays an important role in the national economy, and is an important strategic resource and a metal element material with a wide range of uses. In practical applications, nickel is mainly used in the form of alloying elements in special-purpose parts, precision instruments and military equipment materials, and is an essential additive in military, machinery, steel and aerospace materials. Nickel can form metal alloy materials with different uses in proportion with other metal materials, such as nickel-based heat-resistant materials, nickel-based corrosion-resistant materials, nickel-based wear-resistant materials and nickel-based precision memory materials. Nickel-based alloy materials are widely used in aviation, biology, chemical and other fields. The vast nickel market imposes strict requirements on the purity and quality of nickel. In the process of nickel electrolysis, once the copper ions in the nickel electrolysis anolyte flow into the cathode, they will be precipitated at the cathode before the nickel, which affects the quality of the electrolytic nickel. Therefore, the purification and removal of copper from the nickel electrolytic anolyte becomes the key to ensure the quality of the electrolytic nickel. The present invention is mainly aimed at the purification and copper removal of nickel electrolytic anolyte, and can be used as a copper removal method in electrolytic nickel production or similar situations to reduce the liquid copper ion content and ensure the product quality of electrolytic nickel, which has practical application value and great Great market potential.

发明内容 Contents of the invention

本发明的目的在于提供一种除铜效果好、操作简便的镍电解阳极液中净化除铜的方法。 The object of the present invention is to provide a method for purifying and removing copper in nickel electrolysis anolyte with good copper removal effect and easy operation.

为了实现以上目的,本发明所采用的技术方案是: In order to achieve the above object, the technical solution adopted in the present invention is:

在镍电解阳极液中加入还原剂调整镍电解阳极液的氧化还原电位至50~200mV,再用稀硫酸调整至溶液pH=1.3~4.0,溶液温度控制在50~70℃;在调整好的溶液中加入硫化钡粉末,50~70℃下搅拌反应20~50分钟,热过滤,收集滤液测定溶液中的铜含量。 Add a reducing agent to the nickel electrolysis anolyte to adjust the oxidation-reduction potential of the nickel electrolysis anolyte to 50~200mV, then adjust the solution pH to 1.3~4.0 with dilute sulfuric acid, and control the solution temperature at 50~70°C; Add barium sulfide powder to the solution, stir and react at 50~70°C for 20~50 minutes, heat filter, collect the filtrate to measure the copper content in the solution.

所述还原剂为水合肼溶液、镍粉、硫化钙、盐酸羟胺。 The reducing agent is hydrazine hydrate solution, nickel powder, calcium sulfide, hydroxylamine hydrochloride.

所述水合肼溶液的质量浓度为10%;所述镍粉的纯度为99.5%,粒径小于50μm;所述硫化钙的纯度为97%,粒径小于50μm;所述盐酸羟胺的纯度为99%。 The mass concentration of the hydrazine hydrate solution is 10%; the purity of the nickel powder is 99.5%, and the particle size is less than 50 μm; the purity of the calcium sulfide is 97%, and the particle size is less than 50 μm; the purity of the hydroxylamine hydrochloride is 99% %.

所述稀硫酸的质量浓度为10%。 The mass concentration of the dilute sulfuric acid is 10%.

所述硫化钡的纯度为80%,粒径小于50μm,其加入的摩尔量为铜离子摩尔量的1~5倍。 The purity of the barium sulfide is 80%, the particle size is less than 50 μm, and the molar amount added is 1 to 5 times the molar amount of copper ions.

本发明的除铜原理是:硫化钡水解,缓慢释放硫化氢,硫化氢与溶液中的铜离子反应生成难溶的硫化铜,经过滤除去沉淀即可达到净化除铜的目的。由于镍电解阳极液具有较强的氧化性,为防止除铜的有效成分硫化氢与溶液中的氧化剂发生反应而失去除铜活性,因此除铜前需要先加入还原剂改善镍电解阳极液的氧化还原状态。 The copper removal principle of the present invention is: barium sulfide is hydrolyzed, slowly releases hydrogen sulfide, hydrogen sulfide reacts with copper ions in the solution to form insoluble copper sulfide, and the purpose of purifying and removing copper can be achieved by removing precipitates by filtration. Since the nickel electrolytic anolyte has strong oxidizing properties, in order to prevent the effective component of copper removal, hydrogen sulfide, from reacting with the oxidizing agent in the solution and lose the copper removal activity, it is necessary to add a reducing agent before removing copper to improve the oxidation of the nickel electrolytic anolyte. restore state.

除铜反应方程如下: The copper removal reaction equation is as follows:

具体实施方式   Detailed ways

实施例1: Example 1:

取镍电解阳极液(铜含量为800mg/L)1升,加入水合肼溶液调整镍电解阳极液的氧化还原电位至150mV,用稀硫酸调整至溶液pH=1.3,溶液温度控制为55℃。在调整好的1升溶液中加入硫化钡粉末,硫化钡摩尔量为铜离子摩尔量的1倍,70℃下搅拌反应20分钟,热过滤,收集滤液测定溶液中的铜含量,结果为0.46mg/L。 Take 1 liter of nickel electrolysis anolyte (copper content is 800mg/L), add hydrazine hydrate solution to adjust the redox potential of the nickel electrolysis anolyte to 150mV, adjust the pH of the solution to 1.3 with dilute sulfuric acid, and control the solution temperature to 55°C. Add barium sulfide powder to 1 liter of the adjusted solution, the molar weight of barium sulfide is 1 times the molar weight of copper ions, stir and react at 70°C for 20 minutes, heat filter, collect the filtrate to measure the copper content in the solution, the result is 0.46mg /L.

实施例2: Example 2:

取镍电解阳极液(铜含量为800mg/L)1升,加入水合肼溶液调整镍电解阳极液的氧化还原电位至150mV,用稀硫酸调整至溶液pH=4.0,溶液温度控制为70℃。在调整好的1升溶液中加入硫化钡粉末,硫化钡摩尔量为铜离子摩尔量的5倍,70℃下搅拌反应30分钟,热过滤,收集滤液测定溶液中的铜含量,结果为0.094mg/L。 Take 1 liter of nickel electrolysis anolyte (copper content is 800mg/L), add hydrazine hydrate solution to adjust the redox potential of nickel electrolysis anolyte to 150mV, adjust the solution pH to 4.0 with dilute sulfuric acid, and control the solution temperature to 70°C. Add barium sulfide powder into 1 liter of the adjusted solution, the molar weight of barium sulfide is 5 times of the molar weight of copper ions, stir and react at 70°C for 30 minutes, heat filter, collect the filtrate to measure the copper content in the solution, the result is 0.094mg /L.

实施例3: Example 3:

取镍电解阳极液(铜含量为800mg/L)1升,加入镍粉调整镍电解阳极液的氧化还原电位至50mV,用稀硫酸调整至溶液pH=1.5,溶液温度控制为65℃。在调整好的1升溶液中加入硫化钡粉末,硫化钡摩尔量为铜离子摩尔量的3倍,65℃下搅拌反应50分钟,热过滤,收集滤液测定溶液中的铜含量,结果为0.92mg/L。 Take 1 liter of nickel electrolysis anolyte (with a copper content of 800mg/L), add nickel powder to adjust the redox potential of the nickel electrolysis anolyte to 50mV, adjust the solution pH to 1.5 with dilute sulfuric acid, and control the solution temperature to 65°C. Add barium sulfide powder to 1 liter of the adjusted solution, the molar weight of barium sulfide is 3 times of the molar weight of copper ions, stir and react at 65°C for 50 minutes, heat filter, collect the filtrate to measure the copper content in the solution, the result is 0.92mg /L.

实施例4: Example 4:

取镍电解阳极液(铜含量为800mg/L)1升,加入镍粉调整镍电解阳极液的氧化还原电位至100mV,用稀硫酸调整至溶液pH=1.5,溶液温度控制为65℃。在调整好的1升溶液中加入硫化钡粉末,硫化钡摩尔量为铜离子摩尔量的5倍,65℃下搅拌反应50分钟,热过滤,收集滤液测定溶液中的铜含量,结果为0.80mg/L。 Take 1 liter of nickel electrolysis anolyte (copper content is 800mg/L), add nickel powder to adjust the oxidation-reduction potential of the nickel electrolysis anolyte to 100mV, adjust the pH of the solution to 1.5 with dilute sulfuric acid, and control the solution temperature to 65°C. Add barium sulfide powder into 1 liter of the adjusted solution, the molar weight of barium sulfide is 5 times of the molar weight of copper ions, stir and react at 65°C for 50 minutes, heat filter, collect the filtrate to measure the copper content in the solution, the result is 0.80mg /L.

实施例5: Example 5:

取镍电解阳极液(铜含量为800mg/L)1升,加入硫化钙粉末调整镍电解阳极液的氧化还原电位至100mV,用稀硫酸调整至溶液pH=1.5,溶液温度控制为65℃。在调整好的1升溶液中加入硫化钡粉末,硫化钡摩尔量为铜离子摩尔量的5倍,65℃下搅拌反应20分钟,热过滤,收集滤液测定溶液中的铜含量,结果为0.90mg/L。 Take 1 liter of nickel electrolysis anolyte (copper content is 800mg/L), add calcium sulfide powder to adjust the oxidation-reduction potential of the nickel electrolysis anolyte to 100mV, adjust the pH of the solution to 1.5 with dilute sulfuric acid, and control the solution temperature to 65°C. Add barium sulfide powder into 1 liter of the adjusted solution, the molar weight of barium sulfide is 5 times the molar weight of copper ions, stir and react at 65°C for 20 minutes, heat filter, collect the filtrate to measure the copper content in the solution, the result is 0.90mg /L.

实施例6: Embodiment 6:

取镍电解阳极液(铜含量为800mg/L)1升,加入盐酸羟胺调整镍电解阳极液的氧化还原电位至200mV,用稀硫酸调整至溶液pH=1.5,溶液温度控制为65℃。在调整好的1升溶液中加入硫化钡粉末,硫化钡摩尔量为铜离子摩尔量的5倍,65℃下搅拌反应20分钟,热过滤,收集滤液测定溶液中的铜含量,结果为0.25mg/L。 Take 1 liter of nickel electrolysis anolyte (copper content is 800mg/L), add hydroxylamine hydrochloride to adjust the redox potential of the nickel electrolysis anolyte to 200mV, adjust the solution pH to 1.5 with dilute sulfuric acid, and control the solution temperature to 65°C. Add barium sulfide powder into 1 liter of the adjusted solution, the molar weight of barium sulfide is 5 times of the copper ion molar weight, stir and react at 65°C for 20 minutes, heat filter, collect the filtrate to measure the copper content in the solution, the result is 0.25mg /L.

Claims (5)

1. in a nickle electrolysis anode solution, purify the method for copper removal, it is characterized in that the method is: redox potential to the 50 ~ 200mV adding reductive agent adjustment nickle electrolysis anode solution in nickle electrolysis anode solution, be adjusted to pH value of solution=1.3 ~ 4.0 with dilute sulphuric acid again, solution temperature controls at 50 ~ 70 DEG C; In the solution adjusted, add barium sulphide powder, stirring reaction 20 ~ 50 minutes at 50 ~ 70 DEG C, heat filtering, collect the copper content in filtrate mensuration solution.
2. the method for claim 1, is characterized in that: described reductive agent is hydrazine hydrate solution, nickel powder, sulfurated lime, oxammonium hydrochloride.
3. method as claimed in claim 2, is characterized in that: the mass concentration of described hydrazine hydrate solution is 10%; The purity of described nickel powder is 99.5%, and particle diameter is less than 50 μm; The purity of described sulfurated lime is 97%, and particle diameter is less than 50 μm; The purity of described oxammonium hydrochloride is 99%.
4. the method for claim 1, is characterized in that: the mass concentration of described dilute sulphuric acid is 10%.
5. the method for claim 1, is characterized in that: the purity of described barium sulphide is 80%, and particle diameter is less than 50 μm, and its molar weight added is 1 ~ 5 times of cupric ion molar weight.
CN201510310800.8A 2015-06-09 2015-06-09 Method for removing copper in nickel electrolysis anode solution for purification Pending CN104962949A (en)

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CN115233257A (en) * 2022-04-27 2022-10-25 金川集团股份有限公司 A kind of control method of nickel electrolytic purification to remove copper depth

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Application publication date: 20151007