Method for producing synthetic rutile

A technology of artificial rutile and a production method, which is applied in the directions of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of the artificial rutile leaching process being finely controlled, the solid of the leaching liquid is large, and the calcination temperature is high, and it is easy to continuously The effect of low production and equipment requirements and low calcination temperature

Inactive Publication Date: 2008-08-20
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

However, this method has the following defects: 1. This method uses pressure leaching, which has high requirements for equipment and low production capacity, and it is extremely difficult to achieve continuous production; 2. The problem of fine-graining in the artificial rutile leaching process has not been well controlled; 3. In the mother liquor Fine-grained artificial rutile needs to be added with flocculants to recover fine-grained artificial rutile, which is difficult to filter; 4. The leaching time is long, and the leaching liquid-solid ratio is large; 5. The calcination temperature is high and the energy consumption is large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 2 kg of Panzhihua titanium concentrate (see Table 1 for chemical composition analysis) was first subjected to strong oxidation, the oxidation temperature was 1050 ° C, the oxidant was air, and the oxidation time was 60 minutes; then reduced under the coke oven gas atmosphere, the reduction time was 45 minutes, the reduction Temperature 800 ℃, obtain the titanium ore concentrate after reduction; Get 800 grams of titanium ore concentrates after reduction, acidolysis leaching is heated with distillation flask, and the hydrochloric acid concentration of leaching is 20%, and the liquid-solid ratio of leaching is 3: 1 (ml : g), the leaching time is 5h, the leaching pressure is normal pressure, and the leaching temperature is 100°C. Stir continuously during the leaching process, the extract is cooled and settled, and then the solid phase is filtered, washed, dried at 100°C, and calcined at 500°C. Obtain artificial rutile products. The chemical composition is shown in Table 1,...

Embodiment 2

[0026] The reduced titanium concentrate obtained in Example 1 was subjected to magnetic separation (magnetic field strength 1900 gauss), and 2.5% of non-magnetic tailings and 97.5% of magnetic concentrate were selected. TiO in concentrate 2 The content is 48.10%, SiO 2 The content is 3.09%. 800 grams of magnetic titanium concentrate is heated and acidolysis leached with a distillation flask, the concentration of leached hydrochloric acid is 22%, the ratio of leached liquid to solid is 2.8:1 (ml:g), the leached time is 4 hours, and the leached pressure is normal pressure, and the leaching temperature was 102°C. Stir continuously during the leaching process, the extract is cooled and settled, and then the solid phase is filtered, washed, dried at 100°C, and calcined at 500°C. Obtain artificial rutile products. The chemical composition is shown in Table 2, and the particle size of the artificial rutile is basically the same as that of the original ore. The process recovery r...

Embodiment 3

[0030] The artificial rutile product of Example 2 was subjected to post-magnetic separation (magnetic field strength 6500 Gauss), and the magnetic tailings accounted for 3.2 wt%, and the non-magnetic artificial rutile product accounted for 96.9 wt%. TiO in tailings 2 19.70%, SiO 2 36.4%, MgO 8.85%, CaO 9.26%; the chemical composition of artificial rutile products after magnetic separation is shown in Table 3. The process recovery rate is 96.2%.

[0031] Table 3 gets artificial rutile product chemical composition (wt%) through magnetic separation

[0032] sample name

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Abstract

The invention relates to a production method of artificial rutile, belonging the technical field of chemical engineering, which provides a method of producing high-taste artificial rutiles made of raw ilmenite containing Mg with high Ca contents and has good production continuousness, low energy consumption and less pollution. The production method provided by the invention comprises the following steps: a. ilmenite concentrate is oxidized and roasted at 800-1100 DEG C, and then reduced and roasted at 600-900 DEG C; b. the reduced and roasted ilmenite concentrate is leached by hydrochloric acid with 18-24 percent concentration under normal pressure; c. cleaned and filtered; d. the filter cake is collected and calcined. The production method can used for producing artificial rutile, and has the advantages of low production cost, environmental pollution prevention, low production energy consumption, and easy capacity for continuous production, thereby enjoying wide application prospect.

Description

technical field [0001] The invention relates to a production method of artificial rutile, which belongs to the field of chemical industry. Background technique [0002] The reserves of vanadium-titanium magnetite are very rich in the world, and the reserves in my country are among the best. For example, the reserves in Panxi area reach 10 billion tons, and the total reserves of titanium resources rank first in the country. Vanadium-titanium magnetite is a multi-element symbiotic ore. Its composition varies with the place of origin. The amount of iron in the ore (existing in the form of iron oxide in the ore) is generally about 30-34Wt%. It is mainly used as raw material for iron, vanadium and titanium. The ore is crushed and beneficiated to obtain iron (vanadium) concentrate, and the tailings of iron beneficiation are used to recover titanium concentrate. Titanium concentrate is processed to obtain titanium slag, which can be used to produce titanium dioxide or artificial ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/08
Inventor 叶恩东陈德明张继东
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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