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A kind of preparation method of magnesium chloride particle

A magnesium chloride and particle technology, applied in magnesium chloride, magnesium halide and other directions, can solve the problems of uneven size of magnesium chloride particles, unfavorable energy saving and emission reduction, high blast energy consumption, and achieve the effects of rapid dissolution, not easy to stick, and high product quality.

Active Publication Date: 2017-05-10
TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that the particles stick to each other during the cooling process, resulting in uneven particle size of the final formed magnesium chloride
If you want to get a product with uniform particles, you need to sieve again, resulting in low work efficiency and high production costs
Moreover, the blast energy consumption is high, which is not conducive to energy saving and emission reduction

Method used

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  • A kind of preparation method of magnesium chloride particle

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Experimental program
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Effect test

Embodiment 1

[0016] Heat the magnesium chloride melt to 130°C in the heating kettle, and through the insulation pipe, spray the magnesium chloride melt to the pressure nozzle on the top of the tower, and control the pressure at 2.5MPa. The magnesium chloride melt is sprayed out through the pressure nozzle and dispersed into fine droplets . Keep the temperature of the saturated magnesium chloride aqueous solution at the bottom of the spray tower at 20°C, and the magnesium chloride melt droplets enter the saturated magnesium chloride aqueous solution at the bottom of the spray tower to cool and form into uniform magnesium chloride particles. The saturated aqueous solution of magnesium chloride containing magnesium chloride particles is separated from solid and liquid by a centrifuge to obtain finished magnesium chloride particles with a particle size of about 0.7mm.

Embodiment 2

[0018] Heat the magnesium chloride melt to 140°C in the heating kettle, and spray the magnesium chloride melt to the pressure nozzle on the top of the tower through the insulation pipe, and control the pressure at 3.5MPa. The magnesium chloride melt is sprayed out through the pressure nozzle and dispersed into fine droplets . Keep the temperature of the saturated magnesium chloride aqueous solution at the bottom of the spray tower at 15°C, and the molten magnesium chloride droplets enter the saturated magnesium chloride aqueous solution at the bottom of the spray tower to cool and form into uniform magnesium chloride particles. The magnesium chloride saturated aqueous solution containing magnesium chloride particles is separated from solid and liquid by a centrifuge to obtain finished magnesium chloride particles with a particle size of about 0.5mm.

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Abstract

The present invention discloses a preparation method for magnesium chloride particles, which comprises the technical steps of obtaining the magnesium chloride melt in a heating pot, conveying the magnesium chloride melt to a pressure nozzle at the top of a spray tower through an insulating pipeline, spraying the magnesium chloride melt out of the pressure nozzle to disperse the magnesium chloride melt into fine droplets, controlling the pressure of the droplets of the magnesium chloride melt to be at 2.5-3.5 MPa, feeding the droplets of the magnesium chloride melt in a magnesium chloride saturated aqueous solution at the bottom of the spray tower so as to cool and shape the droplets of the magnesium chloride melt as uniform magnesium chloride particles, keeping the temperature of the magnesium chloride saturated aqueous solution at the bottom of the spray tower at 15-20 DEG C, and subjecting the magnesium chloride saturated aqueous solution containing magnesium chloride particles to the solid-liquid separation treatment in a centrifuge to obtain the finished product of magnesium chloride particles. Magnesium chloride particles prepared by the above method are uniform in particle size, fast to dissolve, and broad in application prospect.

Description

technical field [0001] The invention relates to a preparation method of magnesium chloride particles. Background technique [0002] At present, in industrial production, the preparation method of magnesium chloride particles is mostly air cooling granulation, that is, air is blown into the prilling tower, and the magnesium chloride melt is circulated and cooled in the prilling tower to obtain magnesium chloride particles. The disadvantage of this method is that the particles stick to each other during cooling, resulting in uneven particle size of the final magnesium chloride formed. If you want to get a product with uniform particles, you need to sieve again, resulting in low work efficiency and high production costs. Moreover, the blast energy consumption is high, which is not conducive to energy saving and emission reduction. In view of the above problems, it is an urgent problem to be solved in the field to develop a new preparation method of magnesium chloride particle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/30
Inventor 王玉琪黄西平张琦刘伟王涛王亮
Owner TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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