Method for producing synthetic rutile by using deluvial slope type ilmentie

An artificial rutile and ilmenite technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of unsuitable boiling chlorinated raw materials, low grade of artificial rutile, low softening point at high temperature, etc., and achieve easy continuous production , The equipment material is easy, the effect of high concentration

Active Publication Date: 2012-02-29
CHANGSHA RES INST OF MINING & METALLURGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of ilmenite belongs to weathered ilmenite, and its characteristics are: low titanium grade, high content of impurities, acid solubility is not as good as primary ore, hydrochloric acid leaching pulverization is serious; high temperature softening point is relatively low, and it is easy to sinter during reduction. The artificial rutile produced by reduction rust method and electric furnace method is low in grade and rich in impurities such as calcium and magnesium, so it is also not suitable to be directly used as raw material for boiling chlorination
[0007] At present, there is no report on the preparation of high-quality rutile from residual slope-type ilmenite at home and abroad.

Method used

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  • Method for producing synthetic rutile by using deluvial slope type ilmentie
  • Method for producing synthetic rutile by using deluvial slope type ilmentie
  • Method for producing synthetic rutile by using deluvial slope type ilmentie

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Embodiment 1

[0023]A method for producing artificial rutile with residual slope-type ilmenite of the present invention, the method is to use 400g Yunnan residual slope-type ilmenite as raw material (see table 1 below for its chemical composition, see table 2 below for particle size composition) , including the following steps:

[0024] (1) Reduction pretreatment: first place ilmenite in a rotary kiln, use coal as a reducing agent, and perform reduction treatment at a temperature of 850°C for 30 minutes;

[0025] (2) Oxidation pretreatment: Transfer the discharge after the above reduction pretreatment to the muffle furnace for oxidation treatment. The oxidant used is oxygen. The temperature during the oxidation treatment is controlled at 800-850°C. The shell of rutile microcrystals and iron-rich layer is formed; the roasted material to be oxidized is cooled to 90°C to complete the oxidation process;

[0026] (3) Fluidized acid leaching: send the above-mentioned oxidized pretreated ore into...

Embodiment 2

[0034] A method for producing artificial rutile with residual slope-type ilmenite of the present invention, the method is to use 400g Guangxi residual slope-type ilmenite as raw material (see table 3 below for its chemical composition, see table 4 below for particle size composition) , including the following steps:

[0035] (1) Reduction pretreatment: first place ilmenite in a rotary kiln, use coal as a reducing agent, and perform pre-reduction treatment at a temperature of 900°C for 15 minutes;

[0036] (2) Oxidation pretreatment: Transfer the output after the above reduction pretreatment to the muffle furnace for oxidation treatment, the oxidant used is oxygen, and the temperature during the oxidation treatment is controlled at 800°C (the parameters have been changed to distinguish it from the original patent), after 25 minutes of oxidation treatment, rutile microcrystals and iron-rich shells are formed on the surface of the mineral; the roasted material to be oxidized is c...

Embodiment 3

[0045] A method for producing artificial rutile with residual slope-type ilmenite of the present invention, the method is to use 400 grams of Guangxi altered ilmenite as raw material (see table 5 below for its chemical composition, and table 6 below for particle size composition), Include the following steps:

[0046] (1) Reduction pretreatment: first place ilmenite in a rotary kiln, use coal as a reducing agent, and perform pre-reduction treatment at a temperature of 850°C for 215 minutes;

[0047] (2) Oxidation pretreatment: Transfer the above-mentioned reduced output to the muffle furnace for oxidation treatment. The oxidant used is oxygen. The temperature during the oxidation treatment is controlled at 800 ° C. After 10 minutes of oxidation treatment, there are rutile crystallites and The iron-rich shell is formed; the roasted material to be oxidized is cooled to 90°C to complete the oxidation process;

[0048] (3) Fluidized acid leaching: the above-mentioned pretreated o...

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Abstract

The invention relates to a method for producing synthetic rutile by using ilmentie, in particular to a method for producing synthetic rutile by using deluvial slope type ilmentie. The method comprises the following steps of: performing reduction treatment on the deluvial slope type ilmentie, wherein reducing agents are coal, tar and the like; controlling a reduction temperature and a reduction time; performing oxidation treatment on the reduced ilmentie at the temperature of between 700 and 900 DEG C until a shell of rutile microcrystal and a ferric layer is generated on a mineral surface, wherein an oxidant is oxygen; performing atmospheric multi-segment counterflow fluidization leaching on the oxidized ilmentie by using diluted hydrochloric acid, controlling a concentration of the diluted hydrochloric acid and an acid leaching temperature, and then removing soluble impurities in the ilmentie after more than three segments of leaching; and then washing, filtering, drying and roastingthe leached material after being subjected to acid leaching to obtain the synthetic rutile. The method has the advantages of preventing pulverization, keeping a crude ore grain size, along high acid leaching efficiency, high use ratio, simple process, low cost and easy operation.

Description

technical field [0001] The invention relates to a method for preparing artificial rutile, in particular to a method for preparing artificial rutile with ilmenite. Background technique [0002] 90% of titanium resources are used to produce titanium dioxide. Titanium dioxide is an important high-quality pigment, which is widely used in ink, plastics, chemical fiber, papermaking, aviation, aerospace, metallurgy, petroleum and other fields. According to statistics from the Titanium Dioxide Center of the National Chemical Industry Productivity Promotion Center, the domestic consumption of titanium dioxide in 2009 was about 1 million tons, and the consumption in 2010 is expected to be about 1.1 million tons. [0003] The production process of titanium dioxide is mainly sulfuric acid method and chlorination method. The sulfuric acid method to prepare titanium dioxide has a long production process, high energy consumption, high pollution, and low product quality. Developed countri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/08
Inventor 杨智熊雪良欧阳红勇王康海
Owner CHANGSHA RES INST OF MINING & METALLURGY
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