阅读说明：本技术 一种利用废弃镍液循环再造镍系产品的循环工艺 (Circulation process for recycling nickel-based products by using waste nickel liquid ) 是由 蒋振康 陈龙 王超 吴伟 杨春 杨洋 于 2019-04-25 设计创作，主要内容包括：本发明公开了一种利用废弃镍液循环再造镍系产品的循环工艺,通过以下步骤实施：收集废弃镍液,将所述废弃镍液进行沉淀除杂、洗涤除杂、浆化除杂和脱水净化处理,获得碱式碳酸镍；将碱式碳酸镍依次进行酸化和流体除铁处理,获得标准的镍液；将碱式碳酸镍次进行烘干、筛分以及除铁处理,获得高纯碱式碳酸镍；将高纯碱式碳酸镍进行合成反应,获得电池级乙酸镍晶体；收集利用后的标准的镍液、纯碱式碳酸镍、电池级乙酸镍晶体进行后处理,获得废弃镍液；整个产业链完整、资源化合理的循环再造,绿色生产,设备布局清晰,不仅节约了资源,提高了产品附加值,而且改善了环境,杜绝了二次污染,带来巨大的经济效益。(The invention discloses a recycling process for recycling a nickel product by using waste nickel liquid, which is implemented by the following steps: collecting waste nickel liquid, and carrying out precipitation impurity removal, washing impurity removal, slurrying impurity removal and dehydration purification treatment on the waste nickel liquid to obtain basic nickel carbonate; sequentially acidifying the basic nickel carbonate and removing iron from the fluid to obtain standard nickel liquid; drying, screening and deironing the basic nickel carbonate to obtain high-purity basic nickel carbonate; carrying out synthetic reaction on high-purity basic nickel carbonate to obtain battery-grade nickel acetate crystals; collecting the utilized standard nickel liquid, the soda type nickel carbonate and the battery grade nickel acetate crystal for post-treatment to obtain waste nickel liquid; the whole industrial chain is complete, the recycling is reasonable, the green production is realized, the equipment layout is clear, the resources are saved, the added value of products is improved, the environment is improved, the secondary pollution is avoided, and the huge economic benefit is brought.)

1. A recycling process for recycling and reproducing nickel products by using waste nickel liquid is characterized by comprising the following steps:

step 1, collecting waste nickel liquid, and carrying out precipitation impurity removal, washing impurity removal, slurrying impurity removal and dehydration purification treatment on the waste nickel liquid to obtain basic nickel carbonate;

step 2, sequentially carrying out acidification and fluid iron removal treatment on the basic nickel carbonate obtained in the step 1 to obtain a standard nickel solution;

step 3, drying, screening and deironing the basic nickel carbonate obtained in the step 1 to obtain high-purity basic nickel carbonate;

step 4, carrying out synthetic reaction on the high-purity basic nickel carbonate obtained in the step 3 to obtain battery-grade nickel acetate crystals;

and 5, collecting and post-treating the standard nickel liquid obtained in the step 2, the high-purity basic nickel carbonate obtained in the step 3 and the battery-grade nickel acetate crystal obtained in the step 4 to obtain the waste nickel liquid in the step 1.

2. The recycling process for recycling nickel products by using waste nickel liquid as claimed in claim 1, wherein the step 1 comprises: placing the waste nickel liquid into a reaction kettle, adding an excessive precipitator into the reaction kettle, and carrying out a precipitation reaction for 3-5 h at 60-90 ℃ to obtain a precipitated nickel salt; circularly washing the precipitated nickel salt by adopting high-temperature pure water at the temperature of 60-75 ℃, and pulping and removing impurities by adopting cold pure water at the temperature of 20-30 ℃ to obtain nickel salt after impurity removal; and dehydrating the nickel salt after impurity removal for 10-15 min, and then carrying out solid-liquid separation to obtain the basic nickel carbonate.

3. The recycling process for recycling nickel products from waste nickel solution as claimed in claim 2, wherein the precipitating agent in step 1 is 200-240g/L sodium carbonate solution.

4. The recycling process for recycling nickel products by using waste nickel liquid as claimed in claim 2, wherein the stirring speed in the precipitation reaction in step 1 is 300-400 rmp/min.

5. The recycling process for recycling nickel products by using waste nickel liquid as claimed in claim 2, wherein the pulping time for pulping and impurity removal in step 1 is 5-10 h.

6. The recycling process for recycling nickel products by using waste nickel liquid as claimed in claim 1, wherein the step 2 comprises: and (2) adding an excessive sulfuric acid solution or hydrochloric acid solution into the basic nickel carbonate obtained in the step (1) for acidification, and performing fluid iron removal treatment on the acidified basic nickel carbonate to obtain a standard nickel solution.

7. The recycling process for recycling nickel products by using waste nickel liquid as claimed in claim 1, wherein the step 3 is specifically as follows: and (2) placing the basic nickel carbonate obtained in the step (1) on a disc type dryer, drying at the temperature of 80-90 ℃, screening the dried basic nickel carbonate by using a 300-mesh screen, and then removing iron from the screened basic nickel carbonate to obtain the high-purity basic nickel carbonate.

8. The recycling process for recycling nickel products by using waste nickel liquid as claimed in claim 1, wherein the step 4 comprises: placing the high-purity basic nickel carbonate obtained in the step 3 into a conversion kettle, adding excessive glacial acetic acid solution into the conversion kettle, and carrying out synthetic reaction at room temperature to obtain a high-purity nickel acetate solution; and (3) carrying out MVR evaporation concentration crystallization on the high-purity nickel acetate solution, transferring the high-purity nickel acetate solution to a centrifuge for dehydration for 20-30 min, and then sequentially drying and deironing the crystallized and dehydrated high-purity nickel acetate solution to obtain battery-grade nickel acetate crystals.

9. The recycling process for recycling nickel products by using waste nickel liquid as claimed in claim 8, wherein the drying temperature of the crystallized and dehydrated high-purity nickel acetate solution is 50-60 ℃.

10. The recycling process for recycling nickel products by using waste nickel liquid as claimed in claim 1, wherein the step 5 comprises: collecting the standard nickel liquid obtained in the step 2 after utilization, acidifying and dissolving the high-purity basic nickel carbonate obtained in the step 3 after utilization, and directly dissolving the battery-grade nickel acetate crystal obtained in the step 4 after utilization to obtain the waste nickel liquid in the step 1.

Technical Field

The invention belongs to a chemical preparation method of nickel-based fine chemical products, and particularly relates to a recycling process for recycling and reconstructing nickel-based products by using waste nickel liquid.

Background

Nickel has excellent properties and is now an indispensable metal for the aerospace industry, the defense industry and daily life. The nickel resources which can be mined in the world are divided into nickel sulfide ores and nickel oxide ores, and about 70 percent of nickel in the world is extracted from the nickel sulfide ores at present. But with the gradual reduction of nickel sulfide ore resources, the recycling of waste nickel liquid generated in the nickel extraction process is also very important.

However, the current industrial production product is single, the nickel-based fine chemical products are not processed systematically, partial resource waste is caused, and the production cost is high.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a recycling process for recycling and regenerating nickel-based products by using waste nickel liquid.

A recycling process for recycling a nickel-based product by using waste nickel liquid is implemented by the following steps:

step 1, collecting waste nickel liquid, and carrying out precipitation impurity removal, washing impurity removal, slurrying impurity removal and dehydration purification treatment on the waste nickel liquid to obtain basic nickel carbonate;

step 2, sequentially carrying out acidification and fluid iron removal treatment on the basic nickel carbonate obtained in the step 1 to obtain a standard nickel solution;

Step 3, drying, screening and deironing the basic nickel carbonate obtained in the step 1 to obtain high-purity basic nickel carbonate;

step 4, carrying out synthetic reaction on the high-purity basic nickel carbonate obtained in the step 3 to obtain battery-grade nickel acetate crystals;

and 5, collecting and post-treating the standard nickel liquid obtained in the step 2, the high-purity basic nickel carbonate obtained in the step 3 and the battery-grade nickel acetate crystal obtained in the step 4 to obtain the waste nickel liquid in the step 1.

In the above scheme, the step 1 specifically comprises: placing the waste nickel liquid into a reaction kettle, adding an excessive precipitator into the reaction kettle, and carrying out a precipitation reaction for 3-5 h at 60-90 ℃ to obtain a precipitated nickel salt; circularly washing the precipitated nickel salt by adopting high-temperature pure water at the temperature of 60-75 ℃, and pulping and removing impurities by adopting cold pure water at the temperature of 20-30 ℃ to obtain nickel salt after impurity removal; and dehydrating the nickel salt after impurity removal for 10-15 min, and then carrying out solid-liquid separation to obtain the basic nickel carbonate.

In the scheme, the precipitator in the step 1 is 240g/L sodium carbonate solution 200-.

In the above scheme, the stirring speed in the precipitation reaction process in step 1 is 300-400 rmp/min.

In the scheme, the slurrying time for slurrying and impurity removing in the step 1 is 5-10 hours.

In the above scheme, the step 2 specifically comprises: and (2) adding an excessive sulfuric acid solution or hydrochloric acid solution into the basic nickel carbonate obtained in the step (1) for acidification, and performing fluid iron removal treatment on the acidified basic nickel carbonate to obtain a standard nickel solution.

In the above scheme, the step 3 specifically comprises: and (2) placing the basic nickel carbonate obtained in the step (1) on a disc type dryer, drying at the temperature of 80-90 ℃, screening the dried basic nickel carbonate by using a 300-mesh screen, and then removing iron from the screened basic nickel carbonate to obtain the high-purity basic nickel carbonate.

In the above scheme, the step 4 specifically comprises: placing the high-purity basic nickel carbonate obtained in the step 3 into a conversion kettle, adding excessive glacial acetic acid solution into the conversion kettle, and carrying out synthetic reaction at room temperature to obtain a high-purity nickel acetate solution; and (3) carrying out MVR evaporation concentration crystallization on the high-purity nickel acetate solution, transferring the high-purity nickel acetate solution to a centrifuge for dehydration for 20-30 min, and then sequentially drying and deironing the crystallized and dehydrated high-purity nickel acetate solution to obtain battery-grade nickel acetate crystals.

In the scheme, the drying temperature of the crystallized and dehydrated high-purity nickel acetate solution is 50-60 ℃.

In the above scheme, the step 5 specifically comprises: collecting the standard nickel liquid obtained in the step 2 after utilization, acidifying and dissolving the high-purity basic nickel carbonate obtained in the step 3 after utilization, and directly dissolving the battery-grade nickel acetate crystal obtained in the step 4 after utilization to obtain the waste nickel liquid in the step 1.

Compared with the prior art, the invention provides the recycling process for recycling the nickel-based product by using the waste nickel liquid, the recycling process is complete in industrial chain, reasonable in resource, green in production and clear in equipment layout, not only is the resource saved, but also the additional value of the product is improved, the environment is improved, the secondary pollution is avoided, and the huge economic benefit is brought.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment of the invention provides a circulation process for recycling a nickel product by using waste nickel liquid, which is implemented by the following steps:

Step 1, collecting waste nickel liquid, and carrying out precipitation impurity removal, washing impurity removal, slurrying impurity removal and dehydration purification treatment on the waste nickel liquid to obtain basic nickel carbonate, wherein the method specifically comprises the following steps: placing the waste nickel solution into a reaction kettle, adding an excessive sodium carbonate solution with the concentration of 200-240g/L into the reaction kettle, stirring at the speed of 300-400rmp/min, and carrying out a precipitation reaction at 60-90 ℃ for 3-5 h to obtain a precipitated nickel salt; circularly washing the precipitated nickel salt by adopting high-temperature pure water at the temperature of 60-75 ℃, and pulping and removing impurities for 5-10 hours by adopting cold pure water at the temperature of 20-30 ℃ to obtain nickel salt after impurity removal; dehydrating the nickel salt after impurity removal for 10-15 min, and then carrying out solid-liquid separation to obtain basic nickel carbonate;

and 2, sequentially acidifying the basic nickel carbonate obtained in the step 1 and removing iron from the fluid to obtain a standard nickel solution, which specifically comprises the following steps: adding an excessive sulfuric acid solution or hydrochloric acid solution into the basic nickel carbonate obtained in the step 1 for acidification, and performing fluid iron removal treatment on the acidified basic nickel carbonate to obtain a standard nickel solution;

and 3, drying, screening and deironing the basic nickel carbonate obtained in the step 1 for several times to obtain high-purity basic nickel carbonate, which specifically comprises the following steps: placing the basic nickel carbonate obtained in the step 1 on a disc type dryer, drying at 80-90 ℃, screening the dried basic nickel carbonate by using a 300-mesh screen, and then removing iron from the screened basic nickel carbonate to obtain high-purity basic nickel carbonate;

And 4, carrying out synthetic reaction on the high-purity basic nickel carbonate obtained in the step 3 to obtain battery-grade nickel acetate crystals, which specifically comprises the following steps: placing the high-purity basic nickel carbonate obtained in the step 3 into a conversion kettle, adding excessive glacial acetic acid solution into the conversion kettle, and carrying out synthetic reaction at room temperature to obtain a high-purity nickel acetate solution; after MVR evaporation concentration crystallization, transferring the high-purity nickel acetate solution to a centrifuge for dehydration for 20-30 min, and then drying and deironing the crystallized and dehydrated high-purity nickel acetate solution at the temperature of 50-60 ℃ in sequence to obtain battery-grade nickel acetate crystals;

and 5, collecting and post-treating the standard nickel liquid obtained in the step 2, the high-purity basic nickel carbonate obtained in the step 3 and the battery-grade nickel acetate crystal obtained in the step 4 to obtain the waste nickel liquid in the step 1, wherein the steps are as follows: collecting the standard nickel liquid obtained in the step 2 after utilization, acidifying and dissolving the high-purity basic nickel carbonate obtained in the step 3 after utilization, and directly dissolving the battery-grade nickel acetate crystal obtained in the step 4 after utilization to obtain the waste nickel liquid in the step 1.