Method for preparing titanium-rich materials and granular irons by directly reducing titanic iron ore

A technology of ilmenite and titanium-rich materials, applied in the direction of fluidized bed furnaces, furnaces, furnace types, etc., can solve the problems of heavy pollution, difficult by-products, and high consumption of sulfuric acid, so as to improve the grade and improve the recovery rate of TiO2 , the effect of improving efficiency

Inactive Publication Date: 2012-06-20
TANGSHAN OUTSTANDING SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the methods of enriching ilmenite that have been used in industrial applications or are being studied are reduction methods such as two-stage reduction smelting, weak reduction acid leaching, and reduction rusting. The process has too much pollution. , By-products are difficult to handle, consume more sulfuric acid, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Raw material ingredients: ilmenite (TFe=35.64%, TiO 2 =42.92%), the particle size of the reducing agent (carbon C) processed from bituminous coal is 50-100 mesh after crushing, adding additives to adjust the alkalinity of the material to 0.2-0.7, and mixing ilmenite powder with reducing agent (carbon C), oxidation Calcium and borax are mixed in proportion (ilmenite 1: reducing agent 0.1~0.3: calcium oxide 0.001~0.012: borax 0.0016~0.009), the material is spread on the trolley surface and enters the reduction equipment (drawer kiln), and the temperature is raised to 1200~1400 Keep warm at ℃ for 2~5 hours. After the product leaves the kiln and is quenched in water, the diameter of the iron particles in the material is between 1 and 5mm. Then the material is subjected to grinding and magnetic separation to select the iron-containing powder. The obtained iron-containing powder and Granular iron products, after testing, TFe=88.59%, TiO 2 =6.06%; the titanium-rich material p...

Embodiment 2

[0017] Raw material ingredients: ilmenite (TFe=35.64%, TiO 2 =42.92%), the particle size of the reducing agent (carbon C) processed from bituminous coal is 50-100 mesh after crushing, adding additives to adjust the alkalinity of the material to 0.3-0.5, and mixing ilmenite powder with reducing agent (carbon C), oxidation Magnesium and borax are mixed in proportion (ilmenite 1: reducing agent 0.1~0.2: magnesium oxide 0.002~0.012: borax 0.002~0.009), the material is spread on the trolley surface and enters the reduction equipment (car bottom furnace), and the temperature is raised to 1200~ Keep warm at 1400°C for 2~5 hours. After the product is quenched in water from the kiln, the diameter of the iron particles in the material is between 1 and 5mm. Then the material is subjected to grinding and magnetic separation to select the iron-containing powder, and the obtained iron-containing powder And granular iron products, after testing, TFe=90.29%, TiO 2 =5.06%; the titanium-rich m...

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Abstract

The invention relates to a method for preparing titanium-rich materials and granular irons by directly reducing a titanic iron ore, and belongs to the technical field of metal metallurgy. The method employs a technical scheme as follows: sufficiently mixing the titanic iron ore with a reducing agent and an additive; sending mixed carbon-containing materials into reducing equipment for heating and reducing; discharging reduction product out of a furnace and then carrying out water quenching immediately; water quenching and cooling, and screening granular irons out, and then carrying out ore grinding magnetic separation to the materials, separating iron-containing powders out; making sponge iron briquettes by using the screened granular irons and the iron-containing powders obtained by magnetic separation, and using the sponge iron briquettes as excellent raw materials for steel making; and providing the titanium-rich materials obtained by magnetic separation as excellent raw materials for production of titanium tetrachloride, titanium white and sponge titanium. The method disclosed by the invention maximally increases grade of the titanium-rich materials and recovery rate of TiO2 (being at least 95%); in addition, the granular irons can be used as steel making raw materials, so that remarkable comprehensive utilization effect of resources is realized.

Description

technical field [0001] The invention relates to a method for preparing titanium-rich material and granular iron through direct reduction of ilmenite, which belongs to the technical field of metallurgy. Background technique [0002] As titanium is widely used in more and more fields, the demand for titanium metal is increasing rapidly. North America, Europe and especially Asia have the fastest growing demand for titanium metal. At present, domestic and foreign aerospace, ship and other industries list it as an important strategic material reserve. In the next few years, titanium reserves will show an increasing trend. my country is rich in titanium mineral resources, and the proven reserves are 870 million tons, accounting for about 48% of the world's titanium reserves, ranking first in the world. There are two main types of titanium resources in my country: ilmenite (rock ore + placer) and rutile, of which 98.9% is ilmenite. And my country's ilmenite mainly exists in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/00C22B34/12
Inventor 汪翔宇王建春汪寿平
Owner TANGSHAN OUTSTANDING SCI & TECH
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