Short flow process for preparing high-purity cobalt from low-content nickel-cobalt bioleaching solution

A bioleaching, short process technology, applied in the direction of improving process efficiency, can solve the problems of complex purification, separation and purification process, long process flow and high processing cost, and achieve the effect of good mass transfer effect, simple process and high selectivity.

Inactive Publication Date: 2019-07-05
GRIMAT ENG INST CO LTD
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Problems solved by technology

At present, the bioheap leaching-extraction-electrodeposition process for low-grade copper ore has achieved good recovery results, but for the subsequent purification, separation and purification process of complex low-grade nickel-cobalt sulfide ore bioleaching liquid, there are still long process flow and processing high cost

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  • Short flow process for preparing high-purity cobalt from low-content nickel-cobalt bioleaching solution
  • Short flow process for preparing high-purity cobalt from low-content nickel-cobalt bioleaching solution

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Embodiment 1

[0035] Since a nickel-cobalt ore is a low-grade complex and refractory sulfide ore, the content of valuable metal nickel-cobalt in the bioleach solution obtained by bioheap leaching is low, which makes purification and separation difficult. The traditional extraction and separation efficiency is low and the process is complicated, which seriously affects Comprehensive recovery of nickel and cobalt.

[0036] As shown in Table 1, it is the composition analysis of the nickel-cobalt bioleach solution after the nickel-cobalt ore is bioheap leached to remove iron.

[0037] Table 1

[0038] element co Ni Cu Fe Ca Mg Contentmg / L 198 1840 3.22 0.39 390 14760

[0039] The biological leachate is separated and purified by the process of the present invention, and the specific steps are divided into:

[0040] Step 1: Cooperative extraction is used to deeply purify the nickel-cobalt leaching solution. The specific process is as follows:

[0041] (1) T...

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Abstract

The invention discloses a short flow process for preparing high-purity cobalt from a low-content nickel-cobalt bioleaching solution. The short flow process for preparing the high-purity cobalt from the low-content nickel-cobalt bioleaching solution comprises the following steps that (1) a combined extractant is added into a diluent Mextral DT100 to prepare an organic phase; (2) co-extraction is carried out on the nickel-cobalt bioleaching solution at an initial pH of 1.5 to 3.0 and an equilibrium pH of 3.0 to 4.0; (3) sulfuric acid is added in the organic phase for back extraction to realize nickel-cobalt preconcentration and deep purification; (4) double-extractant extraction resin is prepared; and (5) a HAc-NaAc buffer solution with pH of 3.0 to 5.5 and the sulfuric acid with pH of 1.0 to 3.5 are separately used for two-stage gradient leaching, and a cobalt-containing rich solution obtained by leaching is concentrated and then subjected to electrolytic deposition to obtain a cathodecobalt product. The short flow process for preparing the high-purity cobalt from the low-content nickel-cobalt bioleaching solution has the advantages of multilevel and high efficiency, high selectivity, good mass transfer effect and the like, the purification separation purification efficiency of the cobalt solution is improved, and simple process, easy operation and little environmental pollution are achieved.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metals, and relates to a short-flow process for preparing high-purity cobalt from low-content nickel-cobalt biological leachate. Background technique [0002] Nickel-cobalt is one of the important raw materials for the construction of the national economy. With the development of the national economy, the demand for nickel-cobalt continues to increase, and the ore grade of nickel-cobalt mines is also declining. For some low-grade and refractory nickel-cobalt mines, traditional Smelting processes cannot economically process recycling. The microbial leaching technology has unique features in the utilization of low-grade ores that cannot be used by traditional metallurgical methods, and has the advantages of low process investment, low cost, high yield, less environmental pollution, and simple operation. The treatment of nickel-cobalt ore has a wide range of application value. At present, the bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/40C22B3/18C22B23/00
CPCC22B3/18C22B23/0407C22B23/0484C22B3/409Y02P10/20
Inventor 周桂英温建康周成英
Owner GRIMAT ENG INST CO LTD
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