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Method for recovery and treatment components from mother liquid of artificial rutile

A technology for recovering artificial rutile and mother liquor, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of low production cost and environmental pollution, and achieve low cost and no environmental pollution , The effect of simple and easy process

Inactive Publication Date: 2007-05-09
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has low production cost, but produces a large amount of solution with higher calcium chloride content, which will also pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment l

[0023] The raw materials used are ∑HCl 198.91g / 1, free hydrochloric acid 73.63g / l, Fe 2+ 107.0g / l, Fe 3+ 5.25g / l, Al 3+ 0.24g / l, Ca 2+ 0.36g / l, Mg 2+ 2.93g / l, Si 4+ 0.02g / 1, Ti 4+ 0.05g / l, Mn 2+ 0.56g / l, V 5+ 0.05g / l artificial rutile mother liquor (without removing impurities), firstly filter it through a 0.55mm pore size filter, heat and concentrate the artificial rutile mother liquor by about 30% after filtration, raise the temperature of the solution to 90°C, and then spray the concentrate It is atomized into waste acid microspheres, enters the roaster, and undergoes thermal cracking in a high-temperature oxidizing atmosphere at 685°C to form hydrogen chloride gas and solid oxides. The hydrogen chloride gas is absorbed by the absorption tower to obtain a regenerated new hydrochloric acid with a concentration of 216.2g / l. Ultrafine iron oxide can be obtained by cyclone crushing of solid oxide, and its chemical composition is shown in Table 1 (B-1).

Embodiment 2

[0025] Also use ∑HCl 198.91g / l, free hydrochloric acid 73.63g / l, Fe 2+ 107.0g / l, Fe 3+ 5.25g / l, Al 3+ 0.24g / l, Ca 2+ 0.36g / l, Mg 2+ 2.93g / l, Si 4+ 0.02g / 1, Ti 4+ 0.05g / l, Mn 2+ 0.56g / l, V 5+ 0.05g / l artificial rutile mother liquor (unremoved impurities), firstly filter it through a 0.55mm filter screen, heat and concentrate the artificial rutile mother liquor by 30% after filtration, and raise the temperature of the solution to 95°C, then spray the concentrated liquid through a spray gun Turn into spent acid microspheres, enter the roasting furnace, and undergo thermal cracking in a high-temperature oxidizing atmosphere at 690°C to form hydrogen chloride gas and solid oxides. The hydrogen chloride gas is absorbed by the absorption tower to obtain a regenerated new hydrochloric acid with a concentration of 217.3g / l. Ultrafine iron oxide can be obtained by cyclone crushing of solid oxide, and its chemical composition is shown in Table 1 (B-2).

[0026]

Embodiment 3

[0028] The raw material used is purified artificial rutile mother liquor, containing ∑HCl 224.31g / l, free hydrochloric acid 75.25g / l, Fe 2+ 123.7g / l, Fe 3+ 5.50g / l, Al 3+ 9ppm, Ca 2+ 5ppm, Mg 2+ 7ppm, Si 4+ 12ppm. First, filter through a 0.55mm filter screen. After filtering, the artificial rutile mother liquor is heated and concentrated by about 30%, and the temperature of the solution is raised to 95°C. Thermal cracking occurs in a high-temperature oxidizing atmosphere at ℃ to form hydrogen chloride gas and solid oxides. The hydrogen chloride gas is absorbed by the absorption tower to obtain regenerated hydrochloric acid with a concentration of 218.6g / l, and the solid oxide can be cyclone crushed to obtain ultrafine iron oxide, and its chemical composition is shown in Table 2.

[0029] It can be seen from Table 2 that the iron oxide powder obtained by roasting reaches the level of YHT2 in the SJ10383-93 standard of the Ministry of Electronics Industry.

[0030] ...

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Abstract

A process for recovering the useful components from the mother liquid of artificial rutile includes such steps as filtering, heating for concentrating, spraying it in furnace for calcining, high-temp atomizing to become acid microbeads, thermal decomposing to generate hydrogen chloride gas and solid oxide, collecting the solid oxide, pulverizing to obtain superfine iron oxide, and using water to absorb the hydrogen chloride gas to become regenerated hydrochloric acid.

Description

technical field [0001] The invention relates to a method for recycling and treating artificial rutile mother liquor. Background technique [0002] In the process of leaching titanium concentrate with hydrochloric acid to produce artificial rutile, iron-containing substances in titanium concentrate dissolve into hydrochloric acid to form artificial rutile mother liquor, which is a good raw material for producing ultrafine iron oxide. However, while domestically using this solution to produce ultrafine (about 1.3-1.5 μm) iron oxide, the Cl ions in it have not been properly treated. [0003] For example, a method for continuously producing high-purity ferric oxide with ferrous salt is disclosed in the publication specification of the invention patent application with publication number CN1052098A. The method is to add the purified ferrous salt solution and the prepared seed crystals into a group of series-connected mechanical stirring aeration tanks, adjust the pH value at 2.5...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C01G49/02C01B7/01
Inventor 王彦华黄北卫周一平朱胜友廖荣华胡鸿飞于丹周一林梁英
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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