Method for treating nickel sulfide ore biological heap leaching solution

A nickel sulfide ore and treatment method technology, applied in the direction of process efficiency improvement, etc., can solve the problems of high recovery rate of valuable metals, difficulty in nickel/magnesium separation, small reagent consumption, etc., and achieve high recovery rate and low treatment cost The effect of low and strong economic benefits

Inactive Publication Date: 2011-04-13
LANZHOU JINCHUAN NEW MATERIAL SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is exactly to the deficiency that above-mentioned prior art exists, provides a kind of nickel/magnesium that can effectively solve the nickel/magnesium separation difficulty that low-concentration nickel

Method used

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  • Method for treating nickel sulfide ore biological heap leaching solution
  • Method for treating nickel sulfide ore biological heap leaching solution

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0022] Example 1

[0023] (1) A proper amount of limestone powder (with a particle size of less than 120 mesh) is added into water to slurry, and the slurry-to-solid ratio is 3:1.

[0024] (2) Leach the biopile to about 1m 3 Enter into the iron removal tank, pass in an appropriate amount of air and stir, add the limestone powder slurry to the reaction kettle in the iron removal tank at a certain flow rate (60-100L / h), and control the pH of the reaction liquid in the reaction kettle to 2-4.5 And aeration oxidation time is 2-6 hours, make the Fe in the bio-pile leaching solution at room temperature 2+ Oxidized to Fe 3+ , And hydrolyzed to produce Fe(OH) 3, Co-precipitated with the calcium sulfate produced in the heap leaching solution to form a thick iron slag slurry.

[0025] Table 1 The chemical composition of the supernatant of the heap leaching solution after regular warming

[0026] ingredient

[0027] (3) Fill the ion exchange column with 20-25L of the transformed special resin...

Example Embodiment

[0034] Example 2

[0035] (1) First oxidize the heap leaching solution with self-cultured bacteria for a certain period of time, and analyze Fe 3+ / Fe 2+ , The value ratio is greater than 9 for standby.

[0036] (2) Leach the biopile to about 1m 3 Enter into the iron removal tank, pass in an appropriate amount of air and stir, add the limestone powder slurry to the reactor in the iron removal tank at a certain flow rate (60-100L / h), and control the pH of the reaction liquid in the reactor to be about 4.2 and The aeration oxidation time is 2 hours, and the remaining Fe 2+ Oxidized to Fe 3+ , And hydrolyzed to produce Fe(OH) 3, Co-precipitated together with calcium sulfate produced in the heap leaching solution to form a thick iron slag slurry.

[0037] Table 3 The chemical composition of the supernatant of the heap leaching solution after regular warming of iron

[0038] ingredient

[0039] (3) Other conditions are the same as in Example 1. As a result, the Fe concentration in the ...

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Abstract

The invention discloses a method for treating nickel sulfide ore biological heap leaching solution, which relates to nickel sulfide ore, in particular to a method for recovering valuable metals from high-magnesium high-iron nickel sulfide ore biological heap leaching solution. The method is characterized by comprising the following steps of: adding lime into the biological heap leaching solution for pulpifying, introducing air for oxidization reaction, oxidizing Fe<2+> in the biological heap leaching solution into Fe<3+>, hydrolyzing to generate Fe(OH)3, and performing the adsorption recovery of the valuable metals such as nickel, cobalt and copper in an ion exchange column. Normal temperature iron deposition is realized with low energy consumption; valuable metal ions in the treated heap leaching solution can be lowered to below 3ppm; and the recovery rates of the valuable metal ions are high, and both the recovery rates of the nickel and cobalt metal ions are over 99 percent. The method has low treatment cost and high economic benefit, and industrialized production is easy to realize.

Description

technical field [0001] The invention relates to a method for treating nickel sulfide ore biological heap leaching solution, which relates to a method for recovering valuable metals from nickel sulfide ore, especially high-magnesium and high-iron nickel sulfide mineral heap leaching solution. Background technique [0002] Bioleaching, also known as bacterial metallurgy or microbial leaching, is essentially a hydrometallurgical process in which metals in ores are dissolved through the oxidation and catalysis of a large class of microorganisms. The biological leaching method is especially suitable for heap leaching and in-situ leaching of lean ore, waste ore, off-surface ore, and refractory ore, refractory ore, and the equipment is simple, easy to operate, less investment, low cost, and is conducive to resource utilization. Comprehensive utilization and environmental protection. Therefore, bioleaching shows its unique advantages under the conditions of rich ore resources, decr...

Claims

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Application Information

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IPC IPC(8): C22B3/18C22B3/20C22B3/46C22B3/44C22B15/00C22B23/00
CPCY02P10/20
Inventor 闫忠强彭万通黄良标李洪江柴艮风王杰伟李应荣解兰芝朱国忠马骞
Owner LANZHOU JINCHUAN NEW MATERIAL SCI & TECH
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