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.

Active Publication Date: 2019-10-25
SOUTHWEAT UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since titanium gypsum contains iron hydroxide, it has high moisture content, is not easy to dry, and has low added value.

Method used

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  • Method for preparing calcium ferrite from titanium-gypsum tailings
  • Method for preparing calcium ferrite from titanium-gypsum tailings

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with specific examples.

[0029] (1) Add carbonate to the titanium white wastewater, filter after the reaction, add surfactant to the filtrate, add calcium source for neutralization to obtain titanium gypsum slurry, and physically separate to obtain titanium gypsum tailings. The formulations of raw carbonate, surfactant and calcium source are shown in Table 1.

[0030] Table 1

[0031]

[0032] (2) After the titanogypsum tailings are aged, add binder, catalyst, sintering aid and reducing agent, mix evenly, form balls, reduce and roast to obtain calcium ferrite. The raw material formula is shown in Table 2.

[0033] Table 2

[0034]

[0035] It can be concluded from Examples 1 to 16 that the content of harmful elements in the obtained calcium ferrite meets the quality requirements of steelmaking raw materials, and can be used as a slagging agent for steelmaking.

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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.

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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Application Information

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IPC IPC(8): C01G49/00C21C7/076
CPCC01G49/00C21C7/076Y02P10/20
Inventor 谭宏斌马小玲董发勤李玉香王进明邓秋林王进王军霞李芳贺小春
Owner SOUTHWEAT UNIV OF SCI & TECH
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