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A method for comprehensive utilization of copper oxide ore

A copper oxide ore, uniform mixing technology, applied in the field of nickel, extraction of valuable elements copper, iron, silicon, can solve the problems of difficult filtration, increased copper processing cost, large acid consumption in acid leaching, etc.

Inactive Publication Date: 2015-12-02
NORTHEASTERN UNIV LIAONING
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  • Description
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Problems solved by technology

This method can process low-grade copper oxide ore, and has the advantages of good product quality and no environmental pollution, but acid leaching consumes a lot of acid and is difficult to filter
[0007] The acid leaching-replacement method also uses sulfuric acid as the leaching agent. The copper-poor liquid obtained flows through a tank filled with iron filings, and the iron filings replace copper to obtain sponge copper with a purity of about 70%. Increased copper processing costs

Method used

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  • A method for comprehensive utilization of copper oxide ore
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Effect test

Embodiment 1

[0032] The composition of the copper oxide ore used is: the composition of the copper oxide ore used is: SiO 2 51.30%, CaO13.64%, Fe 2 o 3 13.49%, Al 2 o 3 9.69%, CuO5.30%, MgO4.81%, other 1.77%.

[0033] The copper oxide ore is dried, crushed, and ground to below 80 μm, and the ground copper oxide ore powder is evenly mixed with ammonium sulfate. The amount of ammonium sulfate added is 0.8 times the theoretical value of ammonium sulfate required for the complete reaction of copper, iron and nickel in the copper oxide ore, and the roasting temperature is 350°C for 3 hours. The tail gas generated during the roasting process is absorbed by sulfuric acid and then returned to the roasting process.

[0034] The roasted clinker is eluted with water, the liquid-solid mass ratio is 2:1, stirring is carried out during the elution process, the elution time is 2 hours, the temperature is 20°C, after the elution is completed, it is filtered, and the filter residue is dehydrated for b...

Embodiment 2

[0039] The composition of the copper oxide ore used is: SiO 2 60.44%, Fe 2 o 3 4.69%, Al 2 o 3 12.82%, CuO7.42%, MgO10.25%, NiO0.59%, other 3.79%.

[0040] The copper oxide ore is dried, crushed, and ground to below 80 μm, and the ground copper oxide ore powder is evenly mixed with ammonium sulfate. The amount of ammonium sulfate added is 1.5 times the theoretical value of ammonium sulfate required for the complete reaction of copper, iron and nickel in the copper oxide ore, and the roasting temperature is 500°C for 1 hour. The tail gas generated during the roasting process is absorbed by sulfuric acid and then returned to the roasting process.

[0041] The roasted clinker is eluted with water, the liquid-solid mass ratio is 5:1, the elution time is 0.5h, and the temperature is 100°C. After the elution is completed, it is filtered, and the filter residue is dehydrated to prepare the product silica fume.

[0042] The filtrate after iron precipitation first extracts copper...

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Abstract

The invention relates to a comprehensive utilization method of copper oxide ores, comprising the following steps: mixing copper oxide ores with ammonium bisulfate to roast, absorbing the flue gas generated in the roasting process with sulfuric acid, then returning to the roasting process; dissolving out roasted clinker, and filtering to obtain a filtrate and filter residues, dehydrating the filter residues, preparing the dehydrated filter residues into silica fume products or using the dehydrated filter residues for production building, adjusting the pH value of the filtrate by using ammonium carbonate for iron precipitation when the iron concentration of the filtrate is higher than 1g / L to obtain ammonioiarosite, and calcining the ammonioiarosite to prepare ferric oxide products; extracting copper from a solution obtained after iron precipitation, using the copper solution after back extraction for copper electro-depositing; conducting aluminum precipitation on the solution obtained after copper extraction, then returning to the clinker dissolving-out process to gather nickel and magnesium, and then extracting nickel to prepare nickel products and conducting magnesium precipitation to prepare magnesium products. The method has the advantages of simple process flows, low requirement for equipment, and low production cost, realizes the comprehensive utilization of the copper oxide ores, the whole process does not lead to secondary environmental pollution, and the method meet the needs of green industrial production.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing copper oxide ore, in particular to a method for extracting valuable elements copper, nickel, iron and silicon from copper oxide ore. Background technique [0002] my country is a country short of copper resources. According to the forecast of mineral resources and the current development speed, by 2020, there will be a serious shortage of copper resources. Although there are more than 60 million tons of copper reserves in my country, there are many lean ores, few rich ores, and low ore grades. The rich ores containing 2% copper only account for 6% of the ore reserves. With the continuous mining of high-grade copper sulfide ore resources, the utilization of copper oxide ore has attracted more and more attention. [0003] At present, there are two kinds of processing methods for copper oxide ore: beneficiation and then smelting and direct chemical leaching. The main methods used are: isola...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B3/04C22B3/44
CPCY02P10/234Y02P10/236Y02P10/20
Inventor 翟玉春申晓毅王佳东辛海霞
Owner NORTHEASTERN UNIV LIAONING
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