阅读说明：本技术 一种树脂回收红土镍矿浸出液中金属的方法 (Method for recovering metal from laterite-nickel ore leaching solution by resin ) 是由 王小培 王凌云 王六平 曾苏红 林锡文 于 2019-12-07 设计创作，主要内容包括：本发明公开了一种树脂回收红土镍矿浸出液中金属的方法,包括如下步骤：红土镍矿浸出液经过沉铁、固液分离,得到铁渣和沉铁后液；沉铁后液经过第一树脂柱,得到镍吸附后液和吸附后的第一离子交换树脂；解析吸附后的第一离子交换树脂,得到含镍溶液；调节镍吸附后液pH至4.2-5,冷却至8-15℃后镍吸附后液结晶,离心分离得到镁盐和提镁后液；提镁后液经过第二树脂柱进行吸附,得到重金属吸附后液和吸附后的第二离子交换树脂；解析吸附后的第二离子交换树脂,得到镍、钴、锰重金属混合溶液和重金属吸附后液；其中第一树脂柱和第二树脂柱中的树脂为JY58氢型树脂。本发明提供的树脂回收红土镍矿浸出液中金属的方法,流程简单、成本低、金属回收率高。(The invention discloses a method for recovering metals in a laterite-nickel ore leaching solution by using resin, which comprises the following steps: carrying out iron precipitation and solid-liquid separation on the laterite-nickel ore leaching solution to obtain iron slag and a liquid after iron precipitation; the liquid after iron precipitation passes through a first resin column to obtain a liquid after nickel adsorption and a first ion exchange resin after adsorption; resolving the adsorbed first ion exchange resin to obtain a nickel-containing solution; adjusting the pH value of the nickel-adsorbed liquid to 4.2-5, cooling to 8-15 ℃, crystallizing the nickel-adsorbed liquid, and performing centrifugal separation to obtain magnesium salt and magnesium-extracted liquid; the magnesium-extracted liquid is adsorbed by a second resin column to obtain heavy metal adsorbed liquid and adsorbed second ion exchange resin; analyzing the adsorbed second ion exchange resin to obtain a nickel, cobalt and manganese heavy metal mixed solution and a heavy metal adsorbed solution; wherein the resin in the first resin column and the second resin column is JY58 hydrogen type resin. The method for recovering the metal in the laterite-nickel ore leaching solution by using the resin provided by the invention has the advantages of simple process, low cost and high metal recovery rate.)

1. A method for recovering metals in a lateritic nickel ore leaching solution by using resin is characterized by comprising the following steps:

step S1, carrying out iron precipitation and solid-liquid separation on the laterite-nickel ore leaching solution to obtain iron slag and a liquid after iron precipitation, and adjusting the pH value of the liquid after iron precipitation to 3-4;

step S2, filling JY58 resin into a first ion exchange column to obtain a first resin column, filling tap water into the first resin column until the liquid level is flush with the water level at the liquid inlet so as to ensure that no air exists in the column, and sealing the first resin column;

step S3, enabling the liquid after iron precipitation to pass through a first resin column, and enabling the resin to selectively adsorb nickel to obtain nickel-adsorbed liquid and adsorbed first ion exchange resin;

step S4, analyzing the adsorbed first ion exchange resin to obtain a nickel-containing solution;

step S5, adjusting the pH value of the nickel-adsorbed liquid to 4.2-5, cooling to 8-15 ℃, crystallizing the nickel-adsorbed liquid, and performing centrifugal separation to obtain magnesium salt and magnesium-extracted liquid;

step S6, filling JY58 resin into a second ion exchange column to obtain a second resin column, filling tap water into the second resin column until the liquid level is flush with the water level at the liquid inlet so as to ensure that no air exists in the column, and sealing the second resin column;

step S7, absorbing the magnesium-extracted liquid by a second resin column to obtain heavy metal absorbed liquid and absorbed second ion exchange resin;

step S8, analyzing the adsorbed second ion exchange resin to obtain a nickel, cobalt and manganese heavy metal mixed solution and a heavy metal adsorbed solution, and returning the heavy metal adsorbed solution to the production system for recycling;

wherein the JY58 resin is selected from JY58 hydrogen type resin produced by Bright honest new material science and technology limited.

2. The method for recovering metals from lateritic nickel ore leachate according to the claim 1, characterized in that in steps S4 and S8, the adsorbed first ion exchange resin and the adsorbed second ion exchange resin are respectively desorbed by using a sulfuric acid solution with a mass fraction of 15% -20%.

3. The method for recovering metals in the leachate of lateritic nickel ores by using the resin according to the claim 2, characterized in that the pH value of the desorption solution is controlled to be 1.0-1.2 during the desorption process.

Technical Field

The invention relates to the technical field of hydrometallurgy, in particular to a method for recovering metals in a laterite-nickel ore leaching solution by using resin.

Background

The laterite-nickel ore has low ore grade and higher smelting cost, and has poor technical economy compared with nickel sulfide ore. Due to the limitation of raw material grade, the key points of development and utilization of the laterite-nickel ore at present are to reduce the production cost and simplify the production flow and production equipment. The method for heap leaching of the laterite-nickel ore under normal pressure can reduce the production cost and improve the productivity, but the technical difficulties still exist in the aspects of purification of the laterite-nickel ore leaching solution and enrichment of valuable metals. The prior art generally adopts an alkali or sulfide sedimentation method to recover valuable metals such as nickel, cobalt, copper and the like in the laterite-nickel ore pickle liquor, and the defects of the process are as follows: firstly, the alkali consumption is high, and the production cost is increased; secondly, the treatment of sulfide is easy to cause pollution and safety accidents; thirdly, the recovery rate of valuable metals such as nickel, cobalt and the like is generally low under the condition of the method.

In view of this, the invention aims to provide a novel process for recovering metals from a laterite-nickel ore leaching solution.

Disclosure of Invention

The invention aims to solve the technical problem of providing a method for recovering metals in the laterite-nickel ore leaching solution by using resin, and the method has the characteristics of simple process, low cost and high recovery rate.

In order to solve the problems, the technical scheme of the invention is as follows:

a method for recovering metals in a lateritic nickel ore leaching solution by using resin comprises the following steps:

step S1, carrying out iron precipitation and solid-liquid separation on the laterite-nickel ore leaching solution to obtain iron slag and a liquid after iron precipitation, and adjusting the pH value of the liquid after iron precipitation to 3-4;

step S2, filling JY58 resin into a first ion exchange column to obtain a first resin column, filling tap water into the first resin column until the liquid level is flush with the water level at the liquid inlet so as to ensure that no air exists in the column, and sealing the first resin column;

step S3, enabling the liquid after iron precipitation to pass through a first resin column, and enabling the resin to selectively adsorb nickel to obtain nickel-adsorbed liquid and adsorbed first ion exchange resin;

step S4, analyzing the adsorbed first ion exchange resin to obtain a nickel-containing solution;

step S5, adjusting the pH value of the nickel-adsorbed liquid to 4.2-5, cooling to 8-15 ℃, crystallizing the nickel-adsorbed liquid, and performing centrifugal separation to obtain magnesium salt and magnesium-extracted liquid;

step S6, filling JY58 resin into a second ion exchange column to obtain a second resin column, filling tap water into the second resin column until the liquid level is flush with the water level at the liquid inlet so as to ensure that no air exists in the column, and sealing the second resin column;

step S7, absorbing the magnesium-extracted liquid by a second resin column to obtain heavy metal absorbed liquid and absorbed second ion exchange resin;

step S8, analyzing the adsorbed second ion exchange resin to obtain a nickel, cobalt and manganese heavy metal mixed solution and a heavy metal adsorbed solution, and returning the heavy metal adsorbed solution to the production system for recycling;

wherein the JY58 resin is selected from JY58 hydrogen type resin produced by Bright honest new material science and technology limited.

Further, in steps S4 and S8, the adsorbed first ion exchange resin and the adsorbed second ion exchange resin are desorbed using a sulfuric acid solution with a mass fraction of 15% to 20%, respectively.

Further, in the analysis process, the pH value of the analysis solution is controlled to be 1.0-1.2.

The method for recovering the metal in the laterite-nickel ore leaching solution by using the resin has the beneficial effects that:

the method comprises the steps of firstly, adsorbing the liquid after iron precipitation by using Y58 resin, and recovering to obtain a nickel-containing solution; then cooling and crystallizing the nickel adsorbed liquid, and recovering to obtain magnesium salt; and adsorbing the magnesium-extracted solution again, and recovering to obtain the heavy metal mixed solution of nickel, cobalt and manganese. In addition, JY58 hydrogen-type resin produced by the brilliant new material science and technology limited is adopted as the adsorption resin, so that the adsorption efficiency and the resolution rate are high, and the metal recovery rate is high.

The metal recovery method of the invention has simple process and low cost.

Detailed Description

The following description of the present invention is provided to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention and to make the above objects, features and advantages of the present invention more comprehensible.

It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

A method for recovering metals in a lateritic nickel ore leaching solution by using resin comprises the following steps:

step S1, carrying out iron precipitation and solid-liquid separation on the laterite-nickel ore leaching solution to obtain iron slag and a liquid after iron precipitation, and adjusting the pH value of the liquid after iron precipitation to 3-4;

step S2, filling JY58 resin into a first ion exchange column to obtain a first resin column, filling tap water into the first resin column until the liquid level is flush with the water level at the liquid inlet so as to ensure that no air exists in the column, and sealing the first resin column;

step S3, enabling the liquid after iron precipitation to pass through a first resin column, and enabling the resin to selectively adsorb nickel to obtain nickel-adsorbed liquid and adsorbed first ion exchange resin;

step S4, analyzing the adsorbed first ion exchange resin to obtain a nickel-containing solution;

step S5, adjusting the pH value of the nickel-adsorbed liquid to 4.2-5, cooling to 8-15 ℃, crystallizing the nickel-adsorbed liquid, and performing centrifugal separation to obtain magnesium salt and magnesium-extracted liquid;

step S6, filling JY58 resin into a second ion exchange column to obtain a second resin column, filling tap water into the second resin column until the liquid level is flush with the water level at the liquid inlet so as to ensure that no air exists in the column, and sealing the second resin column;

step S7, absorbing the magnesium-extracted liquid by a second resin column to obtain heavy metal absorbed liquid and absorbed second ion exchange resin;

step S8, analyzing the adsorbed second ion exchange resin to obtain a nickel, cobalt and manganese heavy metal mixed solution and a heavy metal adsorbed solution, and returning the heavy metal adsorbed solution to the production system for recycling;

wherein the JY58 resin is selected from JY58 hydrogen type resin produced by Bright honest new material science and technology limited.

In the invention, in steps S4 and S8, sulfuric acid solution with the mass fraction of 15% -20% is respectively adopted to analyze the adsorbed first ion exchange resin and the adsorbed second ion exchange resin; during the analysis, the pH value of the analysis solution is controlled to be 1.0-1.2.

The method for recovering the metal in the laterite-nickel ore leaching solution by using the resin has the beneficial effects that:

the method comprises the steps of firstly, adsorbing the liquid after iron precipitation by using Y58 resin, and recovering to obtain a nickel-containing solution; then cooling and crystallizing the nickel adsorbed liquid, and recovering to obtain magnesium salt; and adsorbing the magnesium-extracted solution again, and recovering to obtain the heavy metal mixed solution of nickel, cobalt and manganese. In addition, JY58 hydrogen-type resin produced by the brilliant new material science and technology limited is adopted as the adsorption resin, so that the adsorption efficiency and the resolution rate are high, and the metal recovery rate is high.

The metal recovery method of the invention has simple process and low cost.

The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and alterations to these embodiments will occur to those skilled in the art without departing from the spirit and scope of the present invention.