Method for preparing electronic-grade manganese carbonate from rhodochrosite

Abstract

The invention provides a method for preparing electronic-grade manganese carbonate from rhodochrosite. According to the method, rhodochrosite with high impurity content, low manganese content, rich reserves and low price is used as a raw material; ammonia water and carbon dioxide gas are used as carburization agents; and rhodochrosite is subjected to extraction of manganese sulfate, removal of iron aluminum, removal of copper, nickel, lead, cobalt and zinc, removal of calcium and magnesium, removal of silicon and suspended solids, and carbonization of manganese sulfate so as to prepare manganese carbonate. Compared with the prior art, the method provided by the invention has the advantages that production cost is reduced by about 30%; and the method is simple to operate and convenient for large-scale production.

Description

technical field

[0001] The invention belongs to the field of metallurgy and chemical industry, in particular to a method for preparing electronic-grade manganese carbonate by using rhodochrosite as raw material. Background technique

[0002] High-purity manganese carbonate is the raw material for manufacturing soft magnetic ferrite for telecommunication equipment, synthesizing manganese dioxide and other manganese salts, catalyst for desulfurization, pigment for enamel, paint and varnish, used as fertilizer and feed additive, etc., in industrial and agricultural national economy It is widely used in production. The traditional process of producing manganese carbonate is to use manganese ore to leaching to obtain manganese sulfate solution, and then react with carbonate for precipitation. The traditional process needs to prepare carbonate solution and use a large amount of water, and the carbonization efficiency and product quality need to be improved; the patent number is C...