Chlorination furnace slag washing treatment method and use of treatment liquid

A technology for water washing treatment and liquid treatment, applied in the field of smelting, can solve the problems of water failing to meet the national discharge standard and can not be directly discharged, and achieve the effect of solving the problems of treatment and resource utilization and low production cost

Inactive Publication Date: 2014-07-30
董春增
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Problems solved by technology

Chloride ions in chlorination slag can be dissolved in water to remove them by water washing technology, but the treatment of water containin

Method used

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  • Chlorination furnace slag washing treatment method and use of treatment liquid
  • Chlorination furnace slag washing treatment method and use of treatment liquid

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[0016] The process route of the present invention is as figure 1 As shown, it mainly includes three steps: ① water washing of chlorinated slag; ② purification treatment of chloride-containing water; ③ electrolysis of chloride-containing water, as follows:

[0017] ①Water washing of chlorinated slag:

[0018] Such as figure 2 As shown, the washing method of chlorinated slag is carried out several times in a small amount, and the number of washing times is more than three, that is, first soak the chlorinated slag with a small amount of water (10-20 cm of slag submerged) for more than 1-2 hours (except for the first Outside the washing cycle, the slag here is cleaned for the last time, the height of the tank where the chlorinated slag is placed exceeds 0.3m, and the amount of chlorinated slag added reaches two-thirds of the tank volume), the washing water is released, and the aqueous solution flows into In the next tank with chlorinated slag (the slag here is cleaned for the second ...

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Abstract

The invention relates to a chlorination furnace slag washing treatment method and a use of a treatment liquid. The chlorination furnace slag washing treatment method comprises that chloride ions in chlorination furnace slag are dissolved into water by water washing so that the chloride ions are removed. The use of the chlorination furnace slag washing treatment liquid comprises the following steps of 1, separating precipitates of Ca<2+>, Mg<2+>, SO4<2->, Fe<3+> and other heavy metal ions in chloride ion-containing water obtained by water washing from the solution, and removing the precipitates and insoluble impurities by filtration to obtain a filtrate as an electrolyte for the next process, and 2, electrolyzing the chloride ion-containing water obtained by the above process to produce chlorine, hydrogen and a caustic soda solution. The chlorination furnace slag washing treatment method solves a key technical problem limiting use of chlorination furnace slag in a building material industry. Through the chlorination furnace slag washing treatment method, chloride ions in chlorination furnace slag are removed and the chlorination furnace slag can be directly used in the building material industry so that chloride ion-containing water treatment and recycling are realized simultaneously and a large amount of chlorine is provided for a chlorination process of TiCl4 preparation. Through removal of harmful impurity ions and other insoluble impurities, saline water satisfying electrolytic requirements is obtained and a production cost is low.

Description

technical field [0001] The invention relates to the technical field of smelting, in particular to a water washing treatment method for chlorinated slag and the application of the treatment liquid. Background technique [0002] Boiling chlorination technology is an important technical link in the production process of titanium dioxide and sponge titanium. In the presence of certain reducing carbon, CaO and MgO in titanium-rich materials are preferentially chlorinated to form CaCl 2 and MgCl 2 , it is difficult to volatilize and remove during the chlorination process. The chlorinated slag contains a large amount of CaCl 2 , MgCl 2 and a small amount of FeCl 3 , MnCl 2 , if the chlorinated slag is directly used to prepare cement or used in concrete as an admixture, the chloride ions contained in the slag will have a strong corrosion effect on steel bars, which seriously limits the application of chlorinated slag in the building materials industry . The removal of chlorid...

Claims

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Application Information

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IPC IPC(8): C25B1/34C04B5/00
Inventor 董春增王敏
Owner 董春增
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