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Method for producing sodium nitrate by chilisaltpeter ore

A sodium saltpeter ore, sodium nitrate technology, applied in the directions of alkali metal nitrate, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of large process water consumption, high energy consumption of sodium nitrate, low concentration of sodium nitrate, etc. The effect of economical process flow, reduction of energy consumption, and improvement of overall work efficiency

Inactive Publication Date: 2008-05-21
TURPAN BRANCH OF SINKIANG NITRATE MINERALS
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  • Summary
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Problems solved by technology

Although this method is suitable for low-grade sodium saltpeter ore, the water consumption of the process is large, the wind is greatly affected during spraying and leaching, the concentration of sodium nitrate in the leaching solution is low, and the construction investment of beach-dried salt fields is relatively large. The energy consumption is high when the semi-finished product is refined to the workshop to produce sodium nitrate

Method used

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  • Method for producing sodium nitrate by chilisaltpeter ore

Examples

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Embodiment 1

[0021] The method for producing sodium nitrate with sodium nitrate ore, its refinement processing step is

[0022] 1. Ore crushing: Sodium nitrate ore is crushed with a jaw crusher, and the particles with a particle size of ≤2cm are screened and loaded into the leaching tank.

[0023] 2. Five-stage countercurrent circulation leaching: the washing mother liquor enters five-stage countercurrent circulation leaching, the first stage is the fifth leaching of ore, the second stage is the fourth leaching of ore, and so on, the temperature of the leaching solution is graded As the concentration increases, the concentration of the washing liquid also increases step by step, and the leaching completion liquid is obtained. The leaching time of each level is 10h.

[0024] 3. Three-stage washing: use 0.5 times the weight of the ore to wash the ore after five-stage leaching step by step, and the washing sequence is the first stage, the second stage, and the third stage. Wherein the first...

Embodiment 2

[0040] The present embodiment has the same processing steps as Embodiment 1, and only differs in some process parameters, as follows:

[0041] 1. Ore crushing: crush the ore to particles with a particle size of ≤2cm, and put them into the leaching tank.

[0042] 2. Five-stage countercurrent circulation leaching: the washing mother liquor enters five-stage countercurrent circulation leaching, the first stage is the fifth leaching of ore, the second stage is the fourth leaching of ore, and so on, the temperature of the leaching solution is graded As the concentration increases, the concentration of the washing liquid also increases step by step, and the leaching completion liquid is obtained. The leaching time of each level is 8h.

[0043]3. Three-stage washing: use 0.5 times the weight of the ore to carry out step-by-step washing, and the washing sequence is the first stage, the second stage, and the third stage. Wherein the first stage is the third washing of the ore, the se...

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Abstract

The invention relates to a production method for producing sodium nitrate with nitratine and the process steps thereof are that ore is crushed with the particle diameter below 2cm and is first treated with a multi-stage countercurrent hot soak so as to ensure that the content of NaNO3 in leaching solution is more than or equal to 450g / l, and then with a four-effect evaporation to remove NaCl and NaSO4 to ensure that the content of NaNO3 is more than or equal to 950g / l, and finally with centrifugation and drying after a three-stage vacuum cold separation crystallization to obtain the finished sodium nitrate. By adopting the method which has low dependency on natural conditions, water saving and low energy consumption and is suitable for low-grade nitratine mining, the overall yield of the sodium nitrate can reach more than 75 percent.

Description

1. Technical field [0001] The invention relates to a production method of sodium nitrate, in particular to a production process for preparing sodium nitrate finished product from sodium nitrate ore. 2. Background technology [0002] Sodium nitrate is a colorless transparent or light yellow rhombic crystal. It is an inorganic chemical product with a wide range of uses. It can be used as a fertilizer in agriculture, especially for husk crops and root crops, such as beets and radishes. At the same time, it is also a raw material for the manufacture of potassium nitrate, explosives, picric acid, dyes, etc.; it is also used as a defoamer, decolorizer, clarifier and oxidation flux in glass production; it is used as an oxidizer and flux in the enamel industry to prepare enamel powder. ;Mechanical industry is used as a metal cleaning agent, the preparation of ferrous metal bluing agent; metallurgical industry is used as a heat treatment agent for aluminum alloys; light industry is u...

Claims

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Application Information

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IPC IPC(8): C01D9/00
Inventor 茆晓宝戴斌联陈伟来贺其华王有才郝建委
Owner TURPAN BRANCH OF SINKIANG NITRATE MINERALS
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