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Method for preparing potash fertilizer and building material products from white alkali-making mud

A technology for potash fertilizers and building materials, applied in potash fertilizers, applications, inorganic fertilizers, etc., can solve the problems of environmental pollution, soda-making white mud accumulation, etc., and achieve the effects of small equipment investment, large profit margins, and simple process flow

Active Publication Date: 2010-11-10
中盈华富(贵州)科技产业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a method for producing potash fertilizer and building materials using soda lime mud to solve the problem of massive accumulation and environmental pollution of soda lime mud

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] The components of soda-making white mud discharged during the production process of an ammonia-soda method in the south are shown in Table 1:

[0027] Table 1

[0028] Oxide

[0029] Oxide

[0030] According to the weight ratio of soda lime in the composition: potassium ore: additive calcium sulfate 67:31:2, after it is fully mixed, add water with 40% of the total mass of the material, and ball mill for 30 minutes until the particle size of the material is greater than 200 The roasting temperature is 1000 degrees, and the time is 30 minutes. After the roasted product is cooled, it is dissolved in water. The weight ratio of water to the roasted product is 3.56:1. After fully dissolving, it is filtered with a filter cloth, and the filtrate is concentrated and crystallized. When the solubility of potassium sulfate reaches 55%, the temperature is lowered to room temperature to obtain crystals of potassium sulfate and potassium chloride. The main component...

example 2

[0032] The components of soda-making white mud discharged during the production process of an ammonia-soda method in Jiangsu are shown in Table 2:

[0033] Table 2

[0034] Oxide

[0035] Oxide

[0036] According to the weight ratio of soda white mud: potassium ore: additive sodium chloride 36:59:5, after fully mixing it, add water with 45% of the total mass of the material, and ball mill for 37 minutes until the particle size of the material is greater than 200 mesh , dried into pieces for roasting, the roasting temperature is 1060 degrees, and the time is 38 minutes. After the roasted product is cooled, it is dissolved in water. The weight ratio of water and roasted product is 4.93:1. After fully dissolving, it is filtered with filter cloth, and the filtrate is concentrated and crystallized until When the solubility of potassium sulfate is 61%, the temperature is rapidly lowered to room temperature to obtain crystals of potassium sulfate and potassium chl...

example 3

[0038] The composition of the soda-making white mud discharged during the production process of an ammonia-soda method in Shandong is shown in Table 3:

[0039] table 3

[0040] Oxide

[0041] Oxide

[0042] According to the weight ratio of soda white mud: potassium ore: additive sodium fluoride 51:45:4, after it is fully mixed, add water with 39% of the total mass of the material, and ball mill for 50 minutes until the particle size of the material is greater than 200 mesh , dried into pieces for roasting, the roasting temperature is 950 degrees, and the time is 80 minutes. After the roasted product is cooled, it is dissolved in water. The weight ratio of water and roasted product is 7.90:1. After fully dissolving, it is filtered with filter cloth, and the filtrate is concentrated and crystallized until When the solubility of potassium sulfate is 58%, the temperature is rapidly lowered to room temperature to obtain crystals of potassium sulfate and potassi...

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Abstract

The invention provides a method for preparing a potash fertilizer and building material products from white alkali-making mud. The method comprises the following steps of: blending 20 to 70 mass percent of the white alkali-making mud, 20 to 70 mass percent of potassium ore and 0.3 to 15 mass percent of additive; performing ball-milling on the mixture to prepare block bodies and drying the block bodies; allowing the block bodies to enter a high-temperature furnace to calcine at the temperature of between 950 and 1,100 DEG C; dissolving the obtained calcined substances in water after the complete reaction; concentrating and crystallizing soluble substances to prepare the potash fertilizer; after filtering, adding activated clay into insoluble substances and mixing uniformly; and compressing, molding and performing steam curing to produce the building material products. The method solves the problems of bulk deposition of the white alkali-making mud and environmental pollution, so the method has the advantages of simple process, less investment of equipment, low cost and wide application prospect, wherein the equipment is the conventional and standard equipment.

Description

technical field [0001] The invention relates to the utilization field of soda-making white mud, in particular to a method for producing potassium fertilizer and building material products by utilizing soda-making white mud. Background technique [0002] Soda-making white mud is an industrial solid waste with a water content of 50% to 60% produced during the production of soda ash by the ammonia-soda method. At present, my country's annual production capacity of soda ash is 8 million tons, of which the ammonia-soda method accounts for more than half, and about 300-350 kg of white mud is produced for every ton of soda ash produced. [0003] The composition of soda-making white mud is roughly: CaCO 3 39.5~60.0%; CaSO 4 2.8~20.0%; CaCl 2 9.8~14.0%; NaCl 2.4~8.0%; CaO 3.0~8.3%; Mg(OH) 2 2.0~15.4%; SiO 2 2.5~9.1%;R 2 o 3 3.1~6.9%; acid insoluble matter 6.0~10.0%. The white mud particles are very fine, and the particle size of more than 65% (volume fraction) of the whit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05D1/00C04B28/06
Inventor 石林
Owner 中盈华富(贵州)科技产业集团有限公司
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