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Method for preparing sodium nitrate with soda niter

A technology of sodium nitrate and sodium nitrate, which is applied in the direction of alkali metal nitrate preparation and energy input, which can solve the problems of affecting the leaching effect, blocking the fluidity of the leaching solution, and consuming other energy sources, so as to improve the leaching yield And efficiency, high product quality, high yield effect

Active Publication Date: 2010-09-22
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent application with the application number 200610150661.8 discloses "a process for producing sodium nitrate by countercurrent leaching with sodium saltpeter". The fine powder will fill the pores of the saltpeter ore layer and block the fluidity of the leaching solution, thereby affecting the leaching effect; and the heating of the low-temperature mother liquor consumes other energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1. A method for producing sodium nitrate with sodium saltpeter, the steps are:

[0017] (1) Crushing the raw ore of sodium nitrate, the ore particle size is less than 40mm, and sieving to obtain sodium nitrate ore with a particle size of 0.83mm to 40mm and sodium nitrate ore powder with a particle size of less than 0.83mm;

[0018] (2) Put the sodium saltpeter ore powder with a particle size of less than 0.83mm in the stirring tank, add water according to the solid-to-liquid weight ratio of 1:0.5, stir for 100 minutes for complete leaching, and then the slurry enters the clarification tank for settlement and clarification to obtain a clear liquid ;

[0019] (3) Put the sodium saltpeter ore with a particle size of 0.83mm to 40mm in the leaching tank, inject the cold analysis mother liquor and / or washing liquid at a solid-to-liquid weight ratio of 1:0.5, start the circulation pump to circulate the leaching liquid, and The leaching is carried out at room temperat...

Embodiment 2

[0021] Example 2. A method for producing sodium nitrate with sodium saltpeter, the steps are:

[0022] (1) Crushing the raw ore of sodium nitrate, the ore particle size is less than 40mm, and sieving to obtain sodium nitrate ore with a particle size of 0.83mm to 40mm and sodium nitrate ore powder with a particle size of less than 0.83mm;

[0023] (2) Put the sodium saltpeter ore powder with a particle size of less than 0.83mm in the stirring tank, add water according to the solid-to-liquid weight ratio of 1:2.0, stir for 10 minutes for complete leaching, and then the slurry enters the clarification tank for settlement and clarification to obtain a clear liquid ;

[0024] (3) Put the sodium saltpeter ore with a particle size of 0.83mm to 30mm in the leaching tank, inject the cold analysis mother liquor and / or washing liquid at a solid-to-liquid weight ratio of 1:1.5, and start the circulation pump to circulate the leaching liquid. The leaching is carried out at normal tempera...

Embodiment 3

[0026] Example 3. A method for producing sodium nitrate with sodium saltpeter, the steps are:

[0027] (1) Crushing the raw ore of sodium nitrate, the ore particle size is less than 40mm, and sieving to obtain sodium nitrate ore with a particle size of 0.83mm to 40mm and sodium nitrate ore powder with a particle size of less than 0.83mm;

[0028] (2) Put the sodium saltpeter ore powder with a particle size less than 0.83mm in the stirring tank, add water according to the solid-to-liquid weight ratio of 1:1, stir for 30 minutes for complete leaching, and then put the slurry into the clarification tank for sedimentation and clarification to obtain Serum;

[0029](3) Put the sodium saltpeter ore with a particle size of 0.83mm to 40mm in the leaching tank, inject the cold analysis mother liquor and / or washing liquid at a solid-to-liquid weight ratio of 1:1, start the circulation pump to circulate the leaching liquid, and The leaching is carried out at normal temperature; the lea...

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Abstract

The invention provides a method for using nitratine to produce sodium nitrate, which is characterized in that the method comprises the steps of: crushing a piece of nitratine raw ore, and sieving the raw ore to obtain nitratine ore and nitratine ore powder; adding water into the nitratine ore powder, and agitating and leaching the powder and then gaining a clear liquid by sedimentation and clarification; positioning the nitratine ore in a leaching pond, feeding a mother liquor for cold separation and / or a washing liquid, starting up a circulating pump to circulate the leaching solution, and leaching the ore under normal temperature; inputting the leaching solution to a solar pond after the leaching; heating the leaching solution to a temperature between 30 DEG C and 80 DEG C by utilizing the stored energy in the solar pond, and extracting high-temperature concentrated solution from the bottom of the solar pond after evaporation concentration; and separating out NaNO3 through crystallization by cooling. The method is applied to low grade nitratine resources, and locations of resources are areas short of water seriously and rich in solar energy resources, and the method has advantages of energy and water saving and easy realization.

Description

technical field [0001] The invention relates to a method for producing sodium nitrate, in particular to a method for producing sodium nitrate with sodium saltpeter. Background technique [0002] Sodium nitrate is an important inorganic chemical raw material and agricultural fertilizer. Its production methods mainly include: neutralization method, absorption method, ion exchange method, double decomposition method and saltpeter method. Because the neutralization method uses nitric acid and soda ash as raw materials, although the operation is simple, the two raw materials are basic chemical raw materials, the cost is expensive, and they are rarely used in industry. The absorption method uses soda ash to absorb nitrogen oxides in the nitric acid tail gas. This method can only be built on the basis of a nitric acid factory. It can reduce environmental pollution by using waste gas and comprehensively utilizing resources. The production cost of the ion exchange method is relativel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D9/02
CPCY02P20/133
Inventor 李永华张宝全李学字陆汉鑫陈奕云干
Owner BLUESTAR LEHIGH ENG INST CO LTD
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