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Process for production of normal salt product by transferring powder salt into crystals

A technology of salt products and crystal transformation, which is applied in the direction of shape preparation of alkali metal halides, etc., can solve the problems of long production process, complicated process, high production cost, etc., and achieve energy saving, continuous and stable process, and low production cost. Effect

Active Publication Date: 2019-06-18
江苏苏盐井神股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1) The powder salt is recrystallized after dissolving, the production process is long and complicated;
[0004] 2) Dissolving and recrystallizing powder salt, secondary evaporation crystallization, high energy consumption, high direct production cost, uneconomical
[0005] 3) Secondary evaporation crystallization evaporation equipment and its supporting equipment are many, the equipment investment is high, and the operating cost is high
[0006] 4) The powder salt market has a small capacity, and it is not economical to treat it as a defective product, and it also occupies the genuine industrial salt market

Method used

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  • Process for production of normal salt product by transferring powder salt into crystals
  • Process for production of normal salt product by transferring powder salt into crystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A powder salt, particle size distribution: 5% of 80-mesh sieve, 15% of 80-100 mesh sieve, 80% of 100-mesh sieve. Through the method of the present invention, powdery sodium chloride is crystal-transformed and industrial salt process method is crystal-transformed. Saturated original halogen is used as the crystal transformation system solution, saturated brine (containing about 305g / L NaCl, NaSO 4 About 14g / L) after salt washing, go to the mixing tank and mix with powder salt to make salt slurry (solid-liquid volume ratio 30%), and the uniformly mixed salt slurry enters the beating and crystal conversion tank, the speed is 100 rpm, and the solid-liquid ratio is controlled 30%, crystal cultivation for 10 hours, the temperature of the mother liquor in the system is 85°C, and the salt slurry is separated by the first-stage cyclone. , the underflow crystal-containing mother liquor is sent to the feeding and mixing process for circulation, and the concentrated salt slurry se...

Embodiment 2

[0044] A kind of powder salt, particle size distribution: 5% of 80-mesh sieve, 15% of 80-100 mesh sieve, 80% of 100-mesh sieve, through the powdery sodium chloride crystal conversion industrial salt process method of the present invention. . After preheating to 90°C, saturated original halogen (containing about 295g / L NaCl, NaSO 4About 18g / L) is used as the crystal transformation system solution. After the saturated brine is washed with salt, go to the mixing tank and mix with powder salt to make salt slurry (solid-to-liquid ratio 10%). / min, the solid-liquid ratio is controlled at 10%, the crystal is cultivated for 16 hours, the temperature of the mother liquor in the system is 70°C, the salt slurry is separated through the first-stage cyclone, and the mother liquor and fine crystals are returned to the second-stage cyclone to continue separation, and the second-stage cyclone Most of the clear night is discharged from the top flow, and the crystal-containing mother liquor in...

Embodiment 3

[0046] A kind of powder salt, particle size distribution: 10% of the 100-mesh sieve, 90% of the 100-mesh sieve; through the powdery sodium chloride crystal conversion industrial salt process method of the present invention, the crystal conversion treatment. After preheating at 95°C, saturated original halogen (containing about 295g / L NaCl, NaSO 4 About 18g / L) is used as the crystal transformation system solution. After the saturated brine is washed with salt, go to the mixing tank and mix with powder salt to make salt slurry (solid-to-liquid ratio 10%). / min, the solid-liquid ratio is controlled at 10%, the crystal is cultivated for 16 hours, the temperature of the mother liquor in the system is 70°C, the salt slurry is separated through the first-stage cyclone, and the mother liquor and fine crystals are returned to the second-stage cyclone to continue separation, and the second-stage cyclone Most of the clear night is discharged from the top flow, and the crystal-containing ...

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Abstract

The invention relates to a process for production of a normal salt product by transferring powder salt into crystals. The process includes powder salt pre-mixing, beating and crystal transformation, normal product separation, salt washing, dehydration and drying steps. The technological method provided by the invention transforms powder salt from fine crystals into coarse crystals directly withoutevaporation, saves energy consumption, and is low in production cost.

Description

technical field [0001] The invention relates to a process for producing authentic salt products through powder salt transformation, which belongs to the field of salt production technology and is mainly suitable for powder salt productization treatment. Background technique [0002] At present, in the vacuum salt production process, the powdery sodium chloride collected by the dry dust collector for drying bed tail gas treatment has a large amount of dust during use due to the fine particle size of the powdered salt, which is harmful to operators and the environment; The impurity content is high, and the processing cost is high; the use range of powder salt is narrow, and the market capacity is small. At present, when the powder salt cannot be digested by the market, and cannot be processed as a defective product, it can only be poured into the original brine to dissolve and make brine, and then evaporated again to make salt, which wastes energy, and the reproduction cost is...

Claims

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Application Information

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IPC IPC(8): C01D3/22C01D3/24
Inventor 曹军宋茜茜董秀芳刘凯郭云云杜乐意
Owner 江苏苏盐井神股份有限公司
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