Continuous crystallization production method for crystal magnesium chloride
A production method and technology of magnesium chloride, applied in the directions of magnesium chloride, magnesium halide, solution crystallization, etc., can solve the problems of continuous crystallization production of crystalline magnesium chloride, continuous crystallization of magnesium chloride products, poor appearance of products, etc. The effect of easy control and low consumption index
Inactive Publication Date: 2015-01-14
天津长芦汉沽盐场有限责任公司
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Problems solved by technology
[0003] In order to solve the problem that magnesium chloride products cannot be continuously crystallized, the present invention provides a production method for continuous crystallization to produce crystalline magnesium chloride, which effectively solves the problem that crystalline magnesium chloride products cannot be produced continuously by crystallization, and the appearance of the produced products is not good, which brings problems for use. inconvenient defect
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[0012] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:
[0013] A production method for the continuous crystallization of crystalline magnesium chloride, which uses brine as a raw material, and continuously mixes the evaporated solution obtained by evaporation with the mother liquor separated by vacuum crystallization to cool down in temperature, and the mixed solution obtained after mixing the brine continuously enters the vacuum crystallizer Vacuum flash crystallization is carried out, and the crystalline magnesium chloride slurry formed after multiple cycles inside the crystallizer is continuously discharged, and enters the next step of separation, drying and other processes to produce crystalline magnesium chloride finished products. The concrete steps of the production method of its continuous ...
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Abstract
The invention discloses a continuous crystallization production method for a crystal magnesium chloride. The method comprises: taking a bittern as a raw material, evaporating to prepare an evaporation finishing liquid, then performing brine blending, crystallization and other operations, and performing separation and other subsequent operations. The brine-blending cooling operation for the evaporation finishing liquid and a mother liquid subjected to vacuum crystallization separation, and the vacuum crystallization operation for a mixed liquid prepared after brine blending is performed are both continuous charging / discharging operations. The continuous crystallization method is stable, helps to effectively solve the problem that the magnesium chloride product cannot continuously crystallize to generate a crystal product, the production process is simple and easy to control, the consumption index is low, and the product is beautiful in appearance and stable in quality, has the appearance morphology of large particle crystal, and has relatively good fluidity.
Description
technical field [0001] The invention relates to a crystallization method, in particular to a production method for continuous crystallization of crystalline magnesium chloride. Background technique [0002] At present, the production method of crystalline magnesium chloride in the prior art mainly uses bromine waste liquid as a raw material, and sequentially produces crystalline magnesium chloride products according to the operation procedures of decolorization, sulfur removal, evaporation, heat preservation and settlement, cooling crystallization or sheet production. The cooling and crystallization process mostly adopts a batch method, and the obtained product is a needle-shaped crystal product, and the crystal is fragile and easily sticks to form a hardening. Another kind of method is to adopt the method for cooling tablet to produce irregular flaky magnesium chloride, and packing is irregular, brings unnecessary trouble to transportation and use. Moreover, intermittent o...
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IPC IPC(8): B01D9/02C01F5/30
Inventor 刘立平任杰马信华王朝乾
Owner 天津长芦汉沽盐场有限责任公司