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Method and device for increasing concentration of iron ions in artificial rutile mother solution

A technology of artificial rutile and mother liquor, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Due to the complex process flow and other problems, the effect of reducing the heating and concentration time, completing the reaction and improving the heat transfer can be achieved.

Active Publication Date: 2014-06-25
YIBIN TIANYUAN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method adds fine iron filings to the mother liquor to increase the iron concentration of the mother liquor, the process flow of the method is complicated, and it is necessary to use toxic chlorine fine iron filings in the process to cause the acidolysis reaction, and the acidolysis reaction is subject to many conditions. Limitation, incomplete reaction, high energy consumption, and the chlorine element in the artificial rutile mother liquor has not been recycled, and a large amount of waste liquid containing chloride ions as a by-product brings serious pollution to the environment
[0008] At present, there are few researches on the treatment technology of artificial rutile mother liquor in the prior art. Basically, the utilization of artificial rutile mother liquor is only to recycle iron without considering the recycling of chlorine element, and the artificial rutile mother liquor contains a large amount of water. By heating, concentrating, The method of spray roasting has high energy consumption and high environmental protection cost

Method used

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  • Method and device for increasing concentration of iron ions in artificial rutile mother solution
  • Method and device for increasing concentration of iron ions in artificial rutile mother solution
  • Method and device for increasing concentration of iron ions in artificial rutile mother solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Pass the tail gas from the titanium concentrate oxidation tower into the pre-evaporator 1 to heat and pre-concentrate the artificial rutile mother liquor, and the Fe in the mother liquor 3+ The concentration is increased to above 150g / L, and at the same time, the temperature of the mother liquor is raised to 85-110°C.

[0056] (2) The pre-concentrated mother liquor enters the premixing tank 4 through the hydrochloric acid pump 2, and is mixed with the sulfuric acid slag provided by the iron source silo 3 in the premixing tank 4 to form a solid-liquid mixed slurry;

[0057] (3) Add the solid-liquid mixed slurry into the fluidized bed reactor 6 through the anticorrosion slurry pump 5, and the gas feed port 606 of the fluidized bed reactor is fed with the mixed gas of hydrogen chloride gas and compressed air, wherein the hydrogen chloride gas is The hydrogen chloride tail gas produced by the pyrolysis of ferric chloride keeps the acid concentration in the slurry consta...

Embodiment 2

[0061] The same operation as in Example 1, the difference is that the hydrogen chloride gas fed into the gas feed port 606 is other by-product hydrogen chloride or hydrogen chloride generated by the combustion of hydrogen chloride, rather than the hydrogen chloride tail gas generated by the pyrolysis of ferric chloride.

[0062] The above steps process 1 m 3 The mother liquor consumes a total of 400,000 kcal of heat energy, which is provided by the waste heat of the titanium concentrate oxidation tail gas and external heat.

Embodiment 3

[0064] The same operation as in Example 1, the difference is that the iron source provided by the iron source silo 3 is iron-containing tailings or iron concentrate, not sulfuric acid slag.

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Abstract

The invention discloses a method and a device for increasing the concentration of iron ions in an artificial rutile mother solution. The method comprises the following steps of: heating and pre-concentrating the artificial rutile mother solution at first, so as to increase the concentration of Fe<3+> in the mother solution to be greater than 150 g / L; and then reacting a mixed iron source in a fluidized bed reactor charged with HCl gas, so as to increase the iron concentration of the mother solution. The device comprises a mother solution pre-treatment system, a gas inlet system, a discharge system, a circulation system, a tail gas treatment system and the fluidized bed reactor. The concentration of iron ions in the mother solution treated via the method and the device disclosed by the invention is obviously increased while the heating-concentrating time is reduced, so that the energy consumption of mother solution treatment is reduced; and simultaneously, chlorine elements in the mother solution are also be recycled, so that the cyclic utilization of energy is realized.

Description

technical field [0001] The invention relates to a method and a device for increasing iron concentration in artificial rutile mother liquor, belonging to the field of chemical industry. Background technique [0002] Artificial rutile refers to a titanium-rich raw material that is the same as natural rutile in terms of composition and structural properties, which is produced by separating most of the iron components in ilmenite by chemical processing methods. In the process of leaching titanium concentrate with hydrochloric acid to produce artificial rutile, it can effectively remove impurity iron and most of CaO, MgO, Al in titanium concentrate 2 o 3 , MnO, etc., to obtain TiO-containing 2 88%-96% high-grade artificial rutile, especially suitable for processing various types of titanium concentrates. However, during the process of leaching titanium concentrate with hydrochloric acid to produce artificial rutile, iron-containing substances and calcium and magnesium oxides i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10
Inventor 颜华邓科张定明唐勇孙永贵周高明
Owner YIBIN TIANYUAN GRP CO LTD
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