Method for preparing acid-soluble titanium slag by high titanium slag through microwave irradiation

Abstract

The invention relates to a method for preparing acid-soluble titanium slag by high titanium slag through microwave irradiation, which comprises the following steps: pulverizing high titanium slag, oxidizers (either sodium nitrate or ammonium nitrate or a mixture of the sodium nitrate and the ammonium nitrate) and calcium oxide or calcium carbonate; adopting microwave irradiation for heating after mixing the ingredients; carrying out modification at the high temperature; converting and reconstructing rutile type or anatase type TiO2 and FeTiO3 in the slag into CaTiO3 mineral phases; after cooling, obtaining acid-soluble titanium slag raw materials suitable for preparing titanium pigments by a sulfuric acid method; curing the acid-soluble titanium slag by sulfuric acid; and leaching the acid-soluble titanium slag by water at a leaching rate between 95.8 and 96.2 weight percent.

Description

1. Technical field

[0001] The invention relates to a method for preparing acid-soluble titanium slag after high-titanium slag undergoes mineral phase reconstruction. Specifically, the invention relates to a method for acid-soluble titanium slag that can meet the requirements for producing titanium dioxide, and belongs to the field of titanium metallurgy. 2. Background technology

[0002] High titanium slag refers to the 2 It is more than 70wt% titanium slag, and the high titanium slag can be used not only as a raw material for producing titanium white by sulfuric acid process, but also as a large amount of raw material for producing titanium white in chlorination process. In China, the titanium slag used for the production of titanium dioxide by the sulfuric acid method is called acid-soluble titanium slag. It is mainly prepared by smelting ilmenite in an electric furnace. Generally, carbonaceous raw materials such as anthracite, coke or petroleum coke are used as reducin...