Dressing and smelting method for high-silt content copper oxide ores

A technology for oxidized copper ore with high mud content, applied in flotation, process efficiency improvement, solid separation, etc., can solve problems affecting the quality of concentrate, low quality of ore slime, difficult to remove, etc., and achieve strong process adaptability , High copper recovery rate, less environmental pollution

Inactive Publication Date: 2014-02-05
KUNMING UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The ammonia leaching-sulfurization precipitation-flotation method mainly deals with refractory copper oxide ore whose gangue is mainly carbonate, both of which belong to (LPF method). Due to the poor applicability of this method and certain environmental problems, currently less used
When conventional flotation is used to treat high-sludge copper oxide, due to the small quality of ore slime and large specific surface area, it is easy to non-selectively adsorb the agent, which increases the consumption of the agent; the adsorption on the surface of the coarse-grained ore forms a cover phenomenon, which hinders the removal of the agent. The interaction with coarse ore particles affects the recovery rate; it is easy to be included in the flotation foam and affects the quality of the concentrate; it is difficult to remove in the process of circulation, which reduces the concentrate grade and copper recovery rate, and even makes flotation difficult.
Therefore, it is no longer possible to economically separate high-silt copper oxide ore by using a single flotation method.

Method used

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  • Dressing and smelting method for high-silt content copper oxide ores

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Experimental program
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Effect test

Embodiment approach 1

[0016] Implementation mode one: if figure 1 As shown, the raw material is a copper oxide mine in Yunnan, with a geological reserve of 35,000 metal tons and a raw ore copper grade of 0.81%. The main copper minerals are malachite, a small amount of chrysocolla, chalcopyrite, bornite, and chalcocite etc., the copper oxidation rate is 73.45%, and the -0.01mm content accounts for 11.56%, which is a high-mud copper oxide ore.

[0017] Adopt the concrete implementation of this invention as follows:

[0018] (1) After the raw ore is crushed to 60mm by the jaw crusher, the ore is washed by a trough washing machine to obtain coarse and fine grains, and the coarse and fine grains are separated by vibrating screen and water for further washing Classification, +1mm coarse grains and -1mm fine grains are obtained, of which the yield of +1mm coarse grains is about 59.31%, and the yield of -1mm fine grains is about 40.69%. The +1mm coarse grains are used in the grinding and flotation syste...

Embodiment approach 2

[0022] Implementation mode two: if figure 1 As shown, the specific steps of this embodiment are:

[0023] (1) The copper oxide ore containing 20wt% mud and 72wt% copper oxidation rate is crushed, washed and classified into coarse-grained pulp and fine-grained pulp without mud. 12wt% copper concentrate and tailings; the copper concentrate can be sold directly to the smelter, and the tailings are stored in the tailings dam. The dividing point between coarse-grained pulp and fine-grained pulp is 0.074mm. The concentration of coarse pulp is 80wt%, and the concentration of fine pulp is 5wt%.

[0024] (2) The fine-grained ore pulp is concentrated, and the overflow water is returned to the ore washing operation in step (1). The underflow is concentrated to 30wt% and then acid leached. The underflow leaching adopts stirring leaching. The acid used for leaching is sulfuric acid. The concentration of the acid is 120g / L, leaching for 1 hour, filtering (solid-liquid separation) and wa...

Embodiment approach 3

[0025] Implementation mode three: if figure 1 As shown, the specific steps of this embodiment are:

[0026] (1) The copper oxide ore containing 50wt% mud and 80wt% copper oxidation rate is crushed, washed and classified into coarse-grained pulp and fine-grained pulp without mud, and the coarse-grained pulp is obtained by grinding and flotation in the prior art 22wt% copper concentrate and tailings; the copper concentrate can be sold directly to the smelter, and the tailings are stockpiled in the tailings dam. The classification range of coarse pulp and fine pulp is 2mm. The concentration of coarse pulp is 92wt%, and the concentration of fine pulp is 45wt%.

[0027] (2) The fine-grained ore pulp is concentrated, and the overflow water is returned to the ore washing operation in step (1). The underflow is concentrated to 60wt% and then acid is leached. The acid concentration is 30g / L, leached for 5 hours, filtered (solid-liquid separation), and the filter residue is washed, ...

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Abstract

The invention relates to a dressing and smelting method for high-silt content copper oxide ores, and belongs to the technical field of mineral processing. The method comprises the following steps of crushing and washing the high-silt content copper oxide ores to obtain silt-free coarse-grain ore pulp and silt-free fine-grain ore pulp, and grinding and floating coarse grains to obtain copper concentrates with copper grade of 12-22wt% and tailings by using the prior art; concentrating the fine-grain ore pulp, returning overflow water for washing operation, adding acids to leach base flow after the base flow is concentrated to 30-60wt%, washing filter residues after filtration (solid-liquid separation), and performing extraction and electro-deposition on cleaning fluid obtained by washing and leachate obtained by filtration to prepare electrolytic copper. The method has the characteristics of high recovery rate, low production cost, high adaptability, less environmental pollution and the like.

Description

technical field [0001] The invention relates to a method for dressing and smelting high-mud copper oxide ore, which belongs to the technical field of mineral processing. Background technique [0002] There are many types of copper ore, and copper oxide ore and mixed copper ore account for 10-15% of the copper deposit, which is an important part of copper ore resources. Copper oxide ores generally have the characteristics of low grade and high mud content, and are complex and refractory ores. With the mining and utilization of mineral resources, copper resources are decreasing day by day, and it is inevitable to develop and utilize low-grade refractory copper ores. [0003] Among copper oxides, high-mud copper oxide accounts for 2 / 3, and high-mud copper oxide has the characteristics of easy crushing and high mud content, and has become a representative of refractory ores. Due to the high mud content of the ore, the current treatment methods for high-mud copper oxide ore at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06B03D1/00
CPCY02P10/20
Inventor 戴惠新郭艳华杨俊龙王举李国栋杨鑫龙李想宋超
Owner KUNMING UNIV OF SCI & TECH
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