Pollution-free processing method and system for tailings generated by chlorination-process titanium extraction

A technology for extracting titanium tailings and processing methods, applied in the direction of calcium/strontium/barium chloride, calcium/strontium/barium halide, etc., can solve problems such as hindering large-scale utilization, and achieve the effect of reducing the content of chloride ions

Inactive Publication Date: 2014-07-23
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology

Due to the large amount of chloride ions contained in the titanium extraction

Method used

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  • Pollution-free processing method and system for tailings generated by chlorination-process titanium extraction
  • Pollution-free processing method and system for tailings generated by chlorination-process titanium extraction
  • Pollution-free processing method and system for tailings generated by chlorination-process titanium extraction

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example 1

[0038] The tailings treatment capacity of this example is 2 tons.

[0039] The temperature of the slag out of the furnace is 500°C, and it is cooled to 150°C by air purging at normal temperature. When the secondary washing liquid is used as the primary washing water, due to the large evaporation, it is necessary to add 0.25t of industrial water, and the tailing slag temperature is reduced to 30°C. After vacuum filtration, the water content in the slag was 15%. After 4 times of vacuum filtration, the chloride ion content in the slag was reduced to 0.12%, and the chloride ion removal rate reached 97.3%.

[0040] The first eluate is enriched with chlorine ions above 80g / L, and after concentration, atomization and drying, 25.6kg of calcium chloride containing water is obtained, and the yield of calcium chloride is about 80%.

example 2

[0042] The temperature of the slag out of the furnace is 400°C, and it is cooled to 125°C by normal temperature air purging. When the secondary washing liquid is used as the primary washing water, due to the large evaporation, it is necessary to supplement industrial water to make the volume ratio of slag water between 1:1~2. During the period, the temperature of the tailings was lowered to 30°C. After each vacuum filtration, the water content in the slag is about 15%. After 4 times of vacuum filtration, the chloride ion content in the slag is reduced to 0.15%, and the chloride ion removal rate reaches 96.6%.

[0043] The chloride ion of the eluent is enriched to more than 70g / L, and after concentration, atomization and drying, 24.3kg of calcium chloride containing water is obtained, and the yield of calcium chloride is about 76%.

[0044] Another aspect of the present invention provides a pollution-free treatment system for titanium tailings extracted by the chlorination meth...

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Abstract

The invention provides a pollution-free processing method and system for tailings generated by chlorination-process titanium extraction. The method comprises the following steps: cooling high-temperature tailings generated by chlorination-process titanium extraction by using cold air to obtain hot air and hot tailings with temperature of 120-150 DEG C; orderly carrying out vacuum washing and filtering on the hot tailings for more than twice, wherein every time vacuum washing and filtering is carried out, the tailings are mixed and soaked with a scrubbing solution and then filtrate and washed tailings can be obtained through filtering, and in addition the filtrate in the last vacuum washing and filtering process is used as the scrubbing solution in the previous vacuum washing and filtering process; concentrating the filtrate obtained in the first vacuum washing and filtering process by using hot air, so as to obtain a concentrated solution; and carrying out spray drying on the concentrated solution to obtain calcium chloride. The system comprises a cooling unit, a vacuum washing and filtering unit, a concentrating unit, a spray drying unit and a cold air supply unit. The tailings which can be applied to the industries such as building materials and can meet the pollution-free requirements can be obtained and cyclic utilization of the scrubbing solution can be achieved; moreover, the pollution-free processing method and system can be effectively connected with the process of preparing titanium tetrachloride by the chlorination process.

Description

technical field [0001] The invention relates to the technical field of recovery and utilization of titanium tailings extracted by a chlorination method, in particular to a pollution-free treatment method for titanium tailings extracted by a chlorination method and a pollution-free treatment system for titanium tails extracted by a chlorination method . Background technique [0002] At present, for the process of smelting ilmenite-containing ore (for example, vanadium-titanium magnetite) by ordinary blast furnace, it can realize large-scale economical smelting of ilmenite-containing ore, but due to the special properties of this mineral, it also leads to TiO with a large proportion (for example, about 52%) of the total titanium resources 2 Along with the iron concentrate into the blast furnace slag, TiO is formed 2 Blast furnace slag with high content of titanium (for example, TiO 2 High-titanium blast furnace slag with a content of 21% to 25%). For titanium-containing bl...

Claims

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Application Information

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IPC IPC(8): C01F11/28
Inventor 王云杨仰军陆平王建鑫刘森林周艾然
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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