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Silicate aqueous solution, fertilizer, preparation method of the fertilizer and carbonized powder for preparing silicate aqueous solution or fertilizer

An aqueous solution and silicate technology, applied in inorganic fertilizers, potash fertilizers, applications, etc., can solve the problems of difficult removal of organic matter, high time cost and high time, and achieve the effect of reducing the reaction time, speeding up the reaction speed and promoting the reaction.

Pending Publication Date: 2019-10-22
AUO CRYSTAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the time required for the reaction of silicon and hydroxide in the above-mentioned preparation method is too high, which will cause the time cost of using waste silicon as the raw material for preparing silicate aqueous solution directly, and because the waste silicon will contain such as Organic impurities such as sealing resins lead to when waste silicon is directly used as a raw material for the preparation of silicon-containing fertilizers, the aforementioned organic substances will remain in the subsequent fertilizers, and these organic substances are difficult to remove from the fertilizer; in addition, the aforementioned preparation method Compared with the existing liquid fertilizer mainly composed of silicate aqueous solution, its alkalinity is relatively high, and the weight ratio of hydrochloric acid-soluble silicon oxide to water-soluble metal oxide does not meet the current application requirements
[0004] Therefore, it is necessary to find a liquid fertilizer whose alkalinity and the weight ratio of hydrochloric acid-soluble silicon oxide and water-soluble metal oxide can meet the current application requirements, and how to solve the problem of residues in silicon-containing fertilizers caused by the aforementioned preparation methods, which are difficult to remove The problem of organic matter and the high reaction time between silicon and hydroxide has become the direction of current research.

Method used

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  • Silicate aqueous solution, fertilizer, preparation method of the fertilizer and carbonized powder for preparing silicate aqueous solution or fertilizer
  • Silicate aqueous solution, fertilizer, preparation method of the fertilizer and carbonized powder for preparing silicate aqueous solution or fertilizer
  • Silicate aqueous solution, fertilizer, preparation method of the fertilizer and carbonized powder for preparing silicate aqueous solution or fertilizer

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0120] Preparation of Purified Powder

[0121] The purified powder of Preparation Example 1 is obtained by the following steps:

[0122] Step (1): Provide a silicon filter cake containing silicon, water and organic matter. The silicon filter cake is the cutting silicon powder (D 50 -The particle size is 0.8μm) aqueous solution is prepared by plate and frame filter press after plate and frame filter press. Wherein, based on the total weight of the silicon filter cake as 100wt%, the content of water is 40wt%.

[0123] Step (2-1): Dewatering the silicon filter cake in a vacuum oven at 160° C. to obtain a dehydrated silicon filter cake after the solid content in the silicon filter cake is 99-99.5 wt%.

[0124] Step (2-2): After pulverizing the dewatered filter cake with a crusher, a plurality of D 50 Reactive particles with a particle size of 1 mm and containing silicon and organic matter.

[0125] Step (2-3): first remove the organic matter in the reaction particles, and th...

preparation example 2

[0127] Preparation of Purified Powder

[0128] The purified powder of Preparation Example 2 is made by the following steps:

[0129] Step (1): Same as Step (1) of Preparation Example 1.

[0130] Step (2-1): first mix the silicon filter cake with reverse osmosis water (RO water), stir and disperse through a high-speed mixer, and then filter through a 150-mesh sieve to obtain a mixed solution. Wherein, after stirring and dispersing and before filtering, based on the total weight of the solution as 100wt%, the weight of the powder formed by the silicon filter cake is 20wt%.

[0131] Step (2-2): After spray-drying the mixed solution, a plurality of D 50 Black reactive particles with a diameter of 36.11 μm, containing silicon and organic matter, and spherical in shape. Among them, the method of spray drying is to transport the mixed solution to the centrifugal atomizing nozzle with a quantitative pump at a feed rate of 40g per minute, and after the mixed solution is centrifugal...

preparation example 3

[0134] Preparation of Purified Powder

[0135] The purified powder of Preparation Example 3 is obtained by the following steps:

[0136] Step (1): Same as Step (1) of Preparation Example 1.

[0137] Step (2-1): After kneading and air-drying the silicon filter cake in a kneading dryer (temperature is 150° C.; pressure is air-exhaust to -70 cmHg), a plurality of D 50 Reactive particles with a particle size of 2.58 μm and irregular shapes. It needs to be explained again that each reaction particle is composed of multiple D 50 It is composed of primary particles with a particle size of 0.8 μm and containing silicon and organic matter.

[0138] Step (2-2): removing the organic matter in the reaction particles to obtain a purified powder. Wherein, the purified powder includes a plurality of D 50 Irregular secondary particles with a particle size of 2.5 μm, and each secondary particle is composed of multiple D 50 Consists of silicon-containing primary particles with a particle...

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Abstract

The invention relates to a silicate aqueous solution, a fertilizer, a preparation method of the fertilizer and carbonized powder for preparing the silicate aqueous solution or the fertilizer. The alkalinity of the silicate aqueous solution is less than 1%; the silicate aqueous solution is obtained by mixing carbonized powder and a hydroxide aqueous solution; wherein the carbonized powder comprisesa plurality of primary particles containing silicon and carbon, the silicate aqueous solution contains a water-soluble metal oxide and hydrochloric acid-soluble silicon oxide, and the weight ratio ofthe hydrochloric acid-soluble silicon oxide to the water-soluble metal oxide ranges from 0.9 to 1.4. The alkalinity of the fertilizer and the weight ratio of the hydrochloric acid soluble silicon oxide to the water-soluble metal oxide better meet the requirements of current application.

Description

technical field [0001] The present invention relates to an aqueous silicate solution, a fertilizer containing the aqueous silicate solution and a preparation method thereof, and a carbonized powder for making an aqueous silicate solution or fertilizer, in particular to a carbonized powder by mixing An aqueous silicate solution obtained from an aqueous hydroxide solution, a method for preparing the same, and a carbonized powder for making an aqueous silicate solution or fertilizer. Background technique [0002] Silicon-containing fertilizers can be classified into liquid silicon fertilizers or solid silicon fertilizers. Liquid silicon fertilizers usually contain silicate aqueous solutions (such as potassium silicate aqueous solutions), while solid silicon fertilizers usually contain silicon and other fertilizer additives. [0003] The existing methods for preparing liquid silicon fertilizer or solid silicon fertilizer usually use silicon as a raw material. China Taiwan Paten...

Claims

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Application Information

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IPC IPC(8): C05D9/00C05D1/00
CPCC05D9/00C05D1/00C05G5/23
Inventor 徐盟贵黄汉璋李东峯邹易谚
Owner AUO CRYSTAL
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