Production technology of ferrous sulfate vityiol from magnetite

Abstract

A process for preparing FeSO4.7H2O from magnetite includes such steps as pulveriznig magntite, grinding, fine dressing, immersing in sulfuric acid, reducing, low-temp crystallizing and vacuum drying.

Description

technical field [0001] The invention belongs to the field of inorganic salts, and relates to a production process of ferrous sulfate heptahydrate, in particular to a process for producing ferrous sulfate heptahydrate by using magnetite as a raw material and adopting an acid dissolution-reduction two-step method. Background technique [0002] The production method of ferrous sulfate heptahydrate used in industry has two kinds at present: the first kind is iron filings-sulfuric acid method to produce ferrous sulfate heptahydrate, and its production technology is sulfuric acid and iron filings reaction, through precipitation, crystallization, dehydration Get ferrous sulfate. Its chemical reaction is as follows: [0003] <chemistry num="001"> <chem file="200410012473_cml001.xml" / > < / chemistry> [0004] The second is the production of ferrous sulfate heptahydrate by the titanium dioxide by-product method. The production process is to decompose ilmenite wit...

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Problems solved by technology

[0010] The present invention is mainly aimed at the high price and limited source of raw material iron filings in the existing production process of ferrous sulfate heptahydrate, which is not suitable for large-scale industrial production, and the product has high impurity content, low grade and waste water and waste gas discharged during production. , the problem of serious environmental pollution by waste slag, and provide a process for producing ferrous sulfate heptahydrate from magnetite, which is cheap and easy to get, suitable for large-scale industrial production, and has no environmental pollution