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Method of separating sodium sulfate crystal from mirabilite mineral

A technology of sodium sulfate and mirabilite ore, which is applied in the direction of alkali metal sulfite/sulfate purification, etc., can solve problems affecting product quality, high cost, and large transportation volume, and achieve improved resource utilization, high product quality, and impurity The effect of low content

Inactive Publication Date: 2005-04-27
温润宪 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mineral salt is used to produce sodium sulfate. Since the water content in mineral salt reaches 15-25%, the production of one ton of sodium sulfate generally consumes 5-7 tons of mineral salt. From hauling raw materials to mud discharge, the transportation volume is very large. The cost is high, and, because other soluble salts are also easily brought into the product, affecting product quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: The method for separating sodium sulfate crystals from Glauber's salt ore is to use excavator to dig up Glauber's salt ore, and Glauber's salt ore is fully mixed with water, and Glauber's salt ore and water are by weight ratio, and its mixing ratio is 1: 0.1; Glauber's salt ore and water The mixing weight ratio of water can be 1:5; the mixing weight ratio of Glauber's salt ore and water can also be 1:2.5; the mixing weight ratio of Glauber's salt ore and water can also be 1:0.5; The mixing weight ratio is 1:1; when the particle size of Glauber's salt ore is greater than 3 mm, the mixed slurry is sent to the separation device, and in the separation device, sodium sulfate crystal particles are separated from the mixed slurry formed by other substances in Glauber's salt ore and water , to obtain sodium sulfate crystal particles with a particle size greater than 3 mm. The separation device can be any one of a sieve, a centrifuge, a vacuum filter, an auger, a p...

Embodiment 2

[0012] Embodiment 2: choose the Glauber's salt ore that contains sodium sulfate 15-25% by weight, water content 10-50%, other soluble impurities 5-15%. Using the method of directly separating sodium sulfate crystals from mirabilite ore, that is, impacting the ore with a high-pressure water gun, and at the same time using a mud pump to quickly send the mixed slurry into a 3mm sieve, where the sieve can be a drum sieve, a vibrating screen, a belt type Any one of the sieves, sieve, the sediment and most of the soluble impurities are discharged with the liquid, and the particles in the ore nitrate are separated by the sodium sulfate crystal particles larger than 3 mm. The separated sodium sulfate crystals contain 37-42% of sodium sulfate, 2-5% of water insoluble matter and 0.5-2% of other soluble impurities in parts by weight. raw material.

[0013] Glauber's salt ore containing 15-25% of sodium sulfate, 10-50% of water content and 5-15% of other soluble impurities is selected by...

Embodiment 3

[0024] Embodiment 3: the quality, the cost of producing Yuanmingfen:

[0025] Glauber's salt ore containing 15-25% of sodium sulfate, 10-50% of water content and 5-15% of other soluble impurities is selected by weight.

[0026] As the method of embodiment 1 and 2, the sodium sulfate crystal that is directly separated from the ore nitrate produces the sodium sulfate crystal powder, consumes 3.5 tons / ton, and the amount of mud discharge (dry basis) is 0.5 tons / ton, and the first-grade product rate is 70%, and the cost is 100%;

[0027] Mineral nitrate production of sodium sulfate consumes 7 tons / ton, sludge discharge (dry basis) 2 tons / ton, first-grade product rate is 30%, and cost is 140%.

[0028] From the above comparative data of embodiment 2, embodiment 3 as can be seen, from the sodium sulfate crystal directly separated from ore nitrate, its technique is simple, product quality is high, and cost is low.

[0029] The process of dissolving brine to produce decahydrate nitr...

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Abstract

The method of separating sodium sulfate crystal from mirabilite mineral includes fully mixing mirabilite ore and water in the ratio of 1 to 0.1-5, and separating the mixed slurry with mirabilite ore grains of size larger than 3 mm in a separator to obtain sodium sulfate crystal grains. The direct separation of sodium sulfate crystal from mirabilite mineral has sodium sulfate product with high purity, and the product may be used in preparing weathered saltpeter, anhydrous saltpeter and anhydrous sodium sulfate. The said process has high ore utilization, low cost and high product quality.

Description

Technical field: [0001] The invention relates to a method for separating sodium sulfate crystals from mirabilite ore, which belongs to the field of ore dressing. Background technique: [0002] Thenardite ore is divided into ancient thenardite ore and modern thenardite ore. Ancient thenardite ore is buried at a depth of several hundred to several thousand meters underground, while modern thenardite ore is mainly on the surface and shallower below the surface. Modern thenardite ore is mainly composed of water-containing thenardite crystal particles. It is composed of sand and sand, and contains a small amount of soluble salts such as sodium chloride and sodium carbonate. The mining method of modern thenardite ore generally adopts the method of solution mining. Method 1. Dig out the ore, add water to dissolve it on the spot, separate the sediment, and the brine enters the crystallization pool. Anhydrous nitrate is produced in summer, decahydrate nitrate is produced in autumn, a...

Claims

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Application Information

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IPC IPC(8): C01D5/16
Inventor 温润宪王尚军
Owner 温润宪
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