Method for preparing calcium ferrite from titanium-gypsum tailings

A technology of titanium gypsum and calcium ferrite, applied in chemical instruments and methods, iron compounds, improvement of process efficiency, etc., can solve the problems of difficult drying, high moisture content, low added value, etc.
CN110372041AActive Publication Date: 2019-10-25SOUTHWEAT UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
SOUTHWEAT UNIV OF SCI & TECH
Publication Date
2019-10-25

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Abstract

The invention discloses a method for preparing calcium ferrite from titanium-gypsum tailings. Carbonate is added to titanium dioxide wastewater, filtration is conducted after reaction, after a surfactant is added to a filtrate, the filtrate is added to a calcium source to obtain titanium-gypsum slurry, and the titanium-gypsum tailings are obtained through physical separation; and after the titanium-gypsum tailings are aged, a binder, a catalyst, a sintering assistant and a reducing agent are added and mixed evenly to form a ball, and the calcium ferrite is obtained by reduction roasting. Compared with existing technical schemes, the method has the characteristics of being low in production cost, high in production efficiency and good in product quality.
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Description

technical field

[0001] The invention relates to the field of resource utilization of industrial waste residues, in particular to high-quality utilization of titanium gypsum. In addition, this patent also relates to the treatment of industrial wastewater, specifically to the treatment of iron-containing sulfuric acid wastewater. Background technique

[0002] According to the present invention, my country is a country with large titanium resources in the world, and the mineral type is mainly ilmenite. According to the data released by the United States Geological Survey (USGS) in 2015, my country's ilmenite reserves are 200 million tons, accounting for 28% of the global reserves, ranking first in the world . There are 45 primary ilmenite deposits in China, mainly distributed in Panxi, Sichuan and Chengde, Hebei. According to the joint statistics of Titanium, Zirconium and Hafnium Branch of China Nonferrous Metals Industry Association and Panzhihua Iron and Steel Titanium Indu...

Claims

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