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Process for efficiently producing fine-particle salt

A preparation process and fine particle technology, which are applied in the shape preparation of alkali metal halides, alkali metal chlorides, etc., can solve the problems of low utilization rate of edible salt processing, increase production and processing costs, loss of powder salt and waste, and save energy. The effect of equipment investment, reduction of processing steps, and simple production operation

Inactive Publication Date: 2014-08-27
浙江绿海制盐有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process operation of two powders and two washings, more equipment is used, energy consumption is large, and over-processing results in more 0.5mm undersieves; in addition, powder washing salt is used to produce small particles of multi-variety salt, which will be broken during the crushing and washing process. Cause > 15% powder salt loss and waste, the overall utilization rate of edible salt processing is not high, increasing production and processing costs

Method used

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  • Process for efficiently producing fine-particle salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] ①Washing: Add large-grained raw salt with a particle size of 3mm in the salt washing tank for washing, and add saturated brine with a concentration of 24.5°Bé, and the solid-to-liquid ratio of raw salt to saturated brine is 6:4;

[0018] ② Centrifugation: The washed salt slurry in step ① is centrifuged and dehydrated by a centrifuge to obtain a centrifugal dehydration product, so that the water content of the centrifugal dehydration product is 5%;

[0019] ③Sieving: In the screening step ②, the centrifuged dehydration products with a particle size of 2.0mm are returned to the centrifugal salt slurry tank in step ② for further centrifugal sieving, so that the final screened out particle size <2.0 mm of fine grained salt.

Embodiment 2

[0021] ①Washing: Add raw material salt with a particle size of 9mm in the salt washing tank for washing, and add saturated brine with a concentration of 26°Bé, and the solid-to-liquid ratio of raw salt to saturated brine is 9:1;

[0022] ② Centrifugation: The washed salt slurry in step ① is centrifuged and dehydrated by a centrifuge to obtain a centrifugal dehydration product, so that the water content of the centrifugal dehydration product is 4%;

[0023] ③Sieving: In the screening step ②, the centrifuged dehydration products with a particle size of 2.0mm are returned to the centrifugal salt slurry tank in step ② for further centrifugal sieving, so that the final screened out particle size <2.0 mm of fine grained salt.

Embodiment 3

[0025] ①Washing: Add large-grained raw salt with a particle size of 15mm in the salt washing tank for washing, and add saturated brine with a concentration of 27°Bé, and the solid-to-liquid ratio of raw salt to saturated brine is 8:2;

[0026] ② Centrifugation: The washed salt slurry in step ① is centrifuged and dehydrated by a centrifuge to obtain a centrifuged dehydration product, so that the water content of the centrifuged dehydration product is 3%;

[0027] ③Sieving: In the screening step ②, the centrifuged dehydration products with a particle size of 2.0mm are returned to the centrifugal salt slurry tank in step ② for further centrifugal sieving, so that the final screened out particle size <2.0 mm of fine grained salt.

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Abstract

The invention relates to a process for efficiently producing fine-particle salt. The process is characterized by comprising the following steps of washing: adding saturated brine into the raw material salt, washing and stirring sufficiently, wherein the solid-liquid ratio of the raw material salt to saturated brine is 1.5-9; centrifuging: centrifuging washed salt slurry obtained in step (1) by a centrifuge for dewatering to obtain the centrifuged and dewatered product of which the water content is less than or equal to 5%; sieving: sieving the centrifuged and dewatered product in step (2) of which the granularity is less than 2.0mm, and enabling the centrifuged and dewatered product of which the granularity is greater than 2.0mm to return back to the centrifuged salt slurry tank again in step (2) and centrifuging again. The process disclosed by the invention has the advantages that since the large-particle salts are used as the raw material, and the innovative washing, centrifugation and sieving steps are integrated, the processing steps of solar salt is effectively reduced; due to no need of a pulverizer, the equipment investment is saved, the installation power is reduced by more than 10%, the production operations are simple, the utilization rate of the raw material is high, the number of needed workers is small and the process for producing and processing salt is worthy to be popularized and applied.

Description

technical field [0001] The invention relates to a high-efficiency preparation process of fine-grain table salt, which is suitable for the field of deep-processing production of large-grain raw salt. Background technique [0002] Small-grained multi-variety salt is a green and environmentally friendly multi-purpose salt product made of sun-dried sea salt as raw material and processed according to special technical requirements and mechanical equipment. Growth metabolism plays an important role in balance regulation, and is deeply loved by people; at the same time, this salt product is also widely used in brewing, pickling, and animal husbandry salt; it is also used in the production of condiments, low-sodium salt, medicinal salt, healthy salt, It is a kind of mother salt green food necessary for natural wind salt. [0003] However, edible salt NY / T1040-2006 stipulates that the proportion of crushed washing salt, sun-dried fine salt, and ordinary salt with a particle size of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/04C01D3/22
Inventor 娄栋王国安林福亮陈飞杰
Owner 浙江绿海制盐有限责任公司
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