Acid picking method for extracting mineral from serpentine

A technology of minerals and serpentine, applied in the improvement of process efficiency, silicon oxide and other directions, can solve problems such as reducing production costs, and achieve the effects of reducing production costs, realizing large-scale industrial production, and improving development value

Inactive Publication Date: 2008-08-06
福建省盛龙化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for extracting minerals from serpentine for the defects that prior art cannot extract high-purity magnesia, silicon dioxide and other valuable components (such as nickel and iron) from serpentine. The advanced acid leaching method can increase the extraction rate of magnesium in serpentine to more than 99%, increase the purity of silica in filter residue to more than 90%, and do not produce waste liquid, waste residue and other pollutants, reducing production cost

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  • Acid picking method for extracting mineral from serpentine

Examples

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example 1

[0020] Add 400g of 80-200 mesh serpentine powder into 1200g of pickling solution, and use a sulfuric acid solution with a concentration of 17% as the pickling solution at the beginning of the process for the first pickling, and the pickling is controlled at 80°C- Within the temperature range of 115°C, stir for 1 hour under normal pressure, filter and separate the rich magnesium sulfate solution with little acid content, which is the completion solution of acid leaching. The filter residue is cleaned of magnesium salt for the second time to become silicon powder for primary immersion, which is ready for the second acid leaching. Slowly add 450g of sulfuric acid with a concentration of 90% into 675g of clear water added with 0.1% to 20% hydrogen fluoride acid leaching aid, and then add the primary silicon powder for the first acid leaching to the acid leaching while taking advantage of the heat of reaction , in the temperature range of 80 ℃ -115 ℃ for the second acid leaching. ...

example 2

[0022] Add 400g of 100-200 mesh serpentine powder into 1400g of pickling solution, and use a sulfuric acid solution with a concentration of 17% as the pickling solution at the beginning of the process for the first pickling.

[0023] The acid leaching is controlled within the temperature range of 80°C-115°C, stirred at normal pressure for 2 hours, and the magnesium sulfate-rich solution with little acid content is filtered and separated, which is the completion solution of the full acid leaching process. The filter residue is cleaned of magnesium salt for the second time to become silicon powder for primary immersion, which is ready for the second acid leaching. Slowly add 450g of 98% sulfuric acid into 675g of clear water added with 0.1% to 20% hydrogen fluoride acid leaching auxiliary agent, and then add the primary silicon powder for the first acid leaching to the acid leaching while taking advantage of the heat of reaction. The second acid leaching is carried out in the te...

example 3

[0025] Add 400g of 80-200 mesh serpentine powder into 1480g of pickling solution, and use a 12% hydrochloric acid solution as the pickling solution at the beginning of the process for the first pickling. The acid leaching is controlled within the temperature range of 80°C-115°C, stirred at normal pressure for 2 hours, and the magnesium chloride-rich solution with little acid content is filtered and separated, which is the completion solution of the whole acid leaching process. The filter residue is cleaned of magnesium salt for the second time to become silicon powder for primary immersion, which is ready for the second acid leaching. 900g concentration is that 30% hydrochloric acid is slowly added to the clear water of 675g that has added 4% sodium fluoride acid leaching auxiliary agent, then while taking advantage of the heat of reaction, the initial leaching silicon powder of the first acid leaching is added in the acid leaching, The second acid leaching is carried out in t...

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Abstract

A method for abstracting minerals from serendipities belongs to the technical field for abstracting metal compounds from ores or ore concentrates through a wet method. The steps of the method are based on a conventional method for using an acid leaching method to abstract magnesium and silicon from the serendipities and compound alternative and circulating acid leaching is carried out for the serendipities, namely the serendipities is acid-leached. The method comprises: processing after dividing the acid leaching into acid leaching solution and acid leaching slag according to leaching targets and adding acid leaching additive which contains fluorine to intensify acid-leaching reaction, thereby, the extraction rate of the magnesium from the serendipities can be increased to more than 99%, and simultaneously the purity of silicon dioxide in filter residue is increased to more than 90%, and repeated reuses of pickle liquor and cleaning mixture in the whole acid leaching process are realized through circulating and alternative acid leaching. The whole technical process does not produce discard solution, waste residue and other contaminants completely, the cost of production is lowered, and the developing value of the serendipities is increased.

Description

technical field [0001] The invention belongs to the technology of extracting metal compounds from ore or concentrate by wet method, in particular to an acid leaching method for extracting minerals from serpentine. Background technique [0002] Serpentine is based on MgO and SiO 2 It is a non-metallic mineral containing a certain amount of crystal water, about 8% iron oxide, about 3‰ nickel element and a small amount of manganese, chromium, aluminum, calcium and other oxides. The reserves of serpentine in my country are huge but have not been effectively utilized. The main reason is that the key acid leaching process in the processing method currently researched and developed cannot be well adapted to the requirements of industrial production. Known from existing patent application documents (application numbers 92101146.6, 01131802.3, 89106821), although serpentine has been used, the utilization rate is not high, and pollutants such as waste liquid and waste residue are eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B26/22C01B33/113
CPCY02P10/20
Inventor 刘湘霖张卫军徐文嘉高中洪刘花子
Owner 福建省盛龙化工有限公司
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