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 , easy equipment material, high concentration effect

Active Publication Date: 2010-10-06
CHANGSHA RES INST OF MINING & METALLURGY
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  • 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 pr

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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

Examples

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Example Embodiment

[0022] Example 1

[0023] A method of the present invention for producing artificial rutile from residual slope ilmenite, which uses 400 g of Yunnan residual slope ilmenite as a raw material (see Table 1 for chemical composition and Table 2 for particle size composition) , Including the following steps:

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

[0025] (2) Oxidation pretreatment: The output after the above reduction pretreatment is transferred to the muffle furnace for oxidation treatment. The oxidant used is oxygen. The temperature during the oxidation treatment is controlled at 800-850℃. After 210min of oxidation treatment, the mineral surface has The rutile crystallites and the outer shell of the iron-rich layer are formed; the calcined material to be oxidized is cooled to 90°C to complete the oxidation process;

[0026] (3) Fluidized acid leaching: send th...

Example Embodiment

[0033] Example 2

[0034] A method of the present invention for producing artificial rutile from residual slope ilmenite, the method uses 400g Guangxi residual slope ilmenite as raw material (the chemical composition is shown in Table 3 below, and the particle size composition is shown in Table 4 below) , Including the following steps:

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

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

Example Embodiment

[0044] Example 3

[0045] A method of the present invention for producing artificial rutile from residual slope-type ilmenite, which uses 400 grams of Guangxi altered ilmenite as raw material (see Table 5 for chemical composition and Table 6 for particle size composition), It includes the following steps:

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

[0047] (2) Oxidation pretreatment: transfer the above-mentioned reduced discharge to the muffle furnace for oxidation treatment. The oxidant used is oxygen. The temperature during the oxidation treatment is controlled at 800℃. After the oxidation treatment for 10 minutes, there are rutile crystals and crystals on the mineral surface. 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-ment...

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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 roasting the 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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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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