Acid picking method for extracting mineral from serpentine

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...

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