High-temperature activated potash feldspar, and preparation method thereof

A technology for activating potassium and potassium feldspar, which is applied to chemical instruments and methods, potash fertilizers, organic fertilizers, etc. It can solve the problems of uncontrollable reactions, cumbersome production process, and high calcination temperature, and achieve the improvement of soil pollution status. The effect of low temperature

Inactive Publication Date: 2017-08-29
包头市盐湖镁钾有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN104909958A discloses a soil conditioner and its production method. The method is to grind and mix potassium feldspar, dolomite, and anthracite evenly, then calcinate at 1100-1300°C, and then add a dispersant to the sintered clinker to pulverize Mixing is sufficient, but the invention has high calcination temperature, high energy consumption, and difficult control of the reaction, so it is difficult to popularize
Chinese patent CN104496726A discloses a method of firing phosphate rock tailings, phosphogypsum, and potassium feldspar as a soil conditioner. The method is to dry the phosphogypsum at 40-55°C for 1-2 hours after natural air-drying, and then pulverize it. , sieving, crushing and grinding the phosphate rock tailings and potassium feldspar, and then sieving, then mixing phosphogypsum, phosphate rock tailings, potassium feldspar and coal, adding water to make spherical or block materials, and then Calcining at 900-1050°C for 0.6-1.3h, then raising the temperature to 1050-1150°C, and continuing to calcine for 0.5h, the soil conditioner is obtained. This invention has the disadvantages of high reaction temperature and high energy consumption. At the same time, the production process is cumbersome and the reaction too long

Method used

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  • High-temperature activated potash feldspar, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mix quicklime and hydrochloric acid at a molar ratio of 2:1, and stir evenly. After the reaction is complete, mix with crushed and sieved potassium feldspar and activated carbon at a mass ratio of 0.8:1:0.2 to obtain a mixed material, add water to mix, and stir evenly , and then put the mixed material into the wheel kiln, calcined at 900 ° C for 30 minutes, let in air to cool to room temperature, cool, take out, crush, and pass through 80 mesh sieve to obtain the activated product of potassium feldspar.

[0023] The potassium feldspar activation product obtained in this example is tested according to the agricultural testing standards NY / T2272-2012, NY / T1973-2010 and NY / T2540-2014, and the results are as follows:

[0024] name

Embodiment 2

[0026] Mix slaked lime and hydrochloric acid at a molar ratio of 2:1, stir evenly, and mix with crushed and sieved potassium feldspar, gypsum powder, and activated carbon at a mass ratio of 0.9:1:0.15:0.1 to obtain the mixed material , add water to mix, stir evenly, and then put the mixed material into the vertical kiln, calcinate at 950 ℃ for 40 min, cool, take out, crush, and pass through a 100-mesh sieve to obtain the activated product of potassium feldspar.

[0027] The potassium feldspar activation product obtained in this example is tested according to the agricultural testing standards NY / T2272-2012, NY / T1973-2010 and NY / T2540-2014, and the results are as follows:

[0028] name

Embodiment 3

[0030] Mix limestone and hydrochloric acid at a molar ratio of 2:1, stir evenly, and mix with crushed and sieved potassium feldspar and calcium sulfate at a mass ratio of 1:1:0.2 after the reaction is sufficient to obtain a mixed material, add water and mix, Stir evenly, then put the mixed material into the rotary kiln, calcinate at 950°C for 30 minutes, cool, take out, crush, and pass through an 80-mesh sieve to obtain the activated product of potassium feldspar.

[0031] The potassium feldspar activation product obtained in this example is tested according to the agricultural testing standards NY / T2272-2012, NY / T1973-2010 and NY / T2540-2014, and the results are as follows:

[0032] name

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Abstract

The invention relates to a method used for high temperature activation of potash feldspar, and belongs to the technical field of chemical engineering, environment protection, and agriculture. According to the method, potash feldspar, anhydrous calcium chloride, and an auxiliary agent are mixed at a certain mass ratio, an obtained mixture is smashed, is mixed to be uniform, and is subjected to high temperature calcining in a kiln so as to realize high temperature activation of potash feldspar. Potash feldspar is rare earth ore associated potassium-enriched ore, hydrochloric acid is prepared from side product liquid chlorine of the chlor-alkali industry. Reaction temperature is low, energy consumption is low, yield is high, an obtained activated product contains a large amount of elements such as potassium, silicon, and calcium, and is capable of promoting growth of crops, and a novel method is provided for solving a difficult problem of scarcity of water-soluble potassium resources in our country.

Description

technical field [0001] The invention relates to a method for activating potassium feldspar, in particular to a method for activating potassium feldspar at high temperature. The method is simple in operation, low in energy and high in efficiency, and the activation product contains a large amount of potassium, silicon, calcium and other elements, and belongs to chemical industry and environmental protection. and agricultural technology. Background technique [0002] Potassium is one of the "three elements of fertilizers". There is a serious shortage of potassium in the soil of our country, and the demand for potassium is very large. At present, the soluble potassium salt used for the production of potassium fertilizer is very scarce, and the insoluble potassium-containing ore resources are very rich. Potassium feldspar is the most important one. Potassium feldspar ore is a water-insoluble potassium resource with high potassium content, the widest distribution and the largest ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05D1/04C09K17/06
Inventor 廖霜韩雷
Owner 包头市盐湖镁钾有限公司
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