Method for preparing iron sulfate with iron ore

Abstract

The invention provides a method of preparing ferric sulfate, which has the procedures that: iron ore is ground into iron powdered ore which is calcined for 2-3 h under the condition of 750-900 DEG C for the spare after being cooled; industrial sulphuric acid solution with 36-40 percent of mass percent concentration is added into a container provided with a mixing device; the iron ore is weighted and added into the industrial sulphuric acid solution for mixing; wherein, the mass percent of the iron ore and the industrial sulphuric acid solution satisfies the need of 1:6; the mixed solution of the iron ore and the industrial sulphuric acid solution is reacted for 2-3 h under the constant temperature of 100 DEG C, and then the ferric sulfate solution can be obtained after being cooled and filtered. The method adopts the iron ore with low cost to be used as the raw material, the iron ore is mixed and reacted with the industrial sulphuric acid solution after being calcined, not only the production process and the operation condition are easily controlled, but also the leaching rate of iron is higher. A feasible path can be provided for the multipurpose use of the iron ore, and a process route with low-cost raw material is provided for producing flocculating agent.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a preparation method of ferric sulfate. Background technique [0002] Iron Sulfate (Fe 2 (SO 4 ) 3 ) is an important chemical raw material and an important agent for water purification and hydrometallurgy. At present, the industrial manufacturing method of ferric sulfate is mainly to directly oxidize or catalyze the ferrous sulfate in aqueous sulfuric acid solution, and what have is to add ozone or oxygen oxidation with bacteria. For example, Canadian patent CA-1018774 discloses a continuous bacterial oxidation process and equipment for producing ferric sulfate, which can convert ferrous sulfate into ferric sulfate by reacting with sulfuric acid and oxygen under the action of bacteria. In addition, iron ore or its mixture with metallic iron is leached with sulfuric acid aqueous solution, and the oxidant used is H 2 o 2 , KCl0 3 , KMnO 4 , O 2 Etc., for example ...

AI Technical Summary

Problems solved by technology

Because above-mentioned prior art is sulfuric acid and ferrous reaction, the required equipment requires good corrosion resistance, so equipment investment, maintenance cost are high, simultaneously oxidant, catalyst consume a lot, and process is also more complicated simultaneously, thereby has limited the production of ferric sulfate and application

The Chinese patent number is 91100626.5, and the title of the invention is "method for producing ferric sulfate from oxidative acid leaching iron ore". It provides a method for preparing ferric sulfate from iron ore, but the method has complex processes and takes a long time.

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