Method for producing potassium sulphate fertilizer by using gypsum

A technology for gypsum and potash fertilizers, which is applied in potash fertilizers, applications, inorganic fertilizers, etc., can solve the problems of high technical content and high cost of supporting equipment, and achieve the effects of being suitable for industrial production, large output, and high economic and social benefits

Active Publication Date: 2011-06-22
GUANGDONG DAZHONG AGRI SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of gypsum to produce chemical fertilizers is still in the research and development stage. There are still technical difficulties such as high cost and high technical content of supporting equipment to realize industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for producing potassium sulfate fertilizer from gypsum; the method is to fully mix 20% gypsum powder and 80% potassium layer stone powder by weight and then calcining, the calcining temperature is 1800°C, and the calcining time is 2 minutes.

Embodiment 2

[0025] A method for producing potassium sulfate fertilizer from gypsum; in the method, 30% by weight of gypsum and 70% of potassium layer stone powder are fully mixed and then calcined, the calcining temperature is 1500 DEG C, and the calcining time is 5 minutes.

Embodiment 3

[0027] A method for producing potassium sulfate fertilizer by utilizing gypsum; the method is to fully mix 40% by weight of gypsum and 60% of potassium layer stone powder, and then calcining, the calcining temperature is 1200 DEG C, and the calcining time is 10 minutes.

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Abstract

The invention relates to the technical field of fertilizer production, in particular to a method for producing potassium sulphate fertilizer by using gypsum. The method comprises the following steps: fully mixing 20 to 80 percent of the gypsum and 20 to 80 percent of potassium feldspar powder in percentage by weight, and calcining the mixture, wherein the calcination temperature is 800 to 1,800 DEG C, and the calcination time is 2 to 120 minutes. The method has easily-obtained raw materials and low cost; and the whole process flow is smooth, simple, easy and is quite suitable for industrialized production.

Description

Technical field: [0001] The invention relates to the technical field of fertilizer production, in particular to a method for producing potassium sulfate fertilizer from gypsum. Background technique: [0002] The main component of gypsum is calcium sulfate, and its molecule is CaSO 4 .2H 2 O, so it is also called dihydrate gypsum and soft gypsum, which belong to the monophyletic crystal system; in addition, there is plaster of paris, also called hemihydrate gypsum. In addition to natural gypsum, large quantities of gypsum can also be produced as a by-product in the chemical industry and thermal power plant flue gas (FGD). Gypsum has a wide range of uses and is one of the oldest building materials in the world. The largest consumption area of ​​gypsum is the building decoration material industry, which is mainly used to manufacture gypsum boards for construction and decoration. In many countries, the production of boards accounts for about More than 80% of consumption. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05D1/02
Inventor 林小明
Owner GUANGDONG DAZHONG AGRI SCI CO LTD
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