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Method for preparing siliceous fertilizer by using dregs of sodium sulphide and its application

A technology of soda sulfide and silicon fertilizer, which is applied in the direction of sulfur preparation/purification, and can solve the problems of extensive silicon fertilizer, large dosage, and difficulty in popularization

Inactive Publication Date: 2005-05-18
胡北晨 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The general silicon fertilizer is relatively extensive, and the application rate per mu is as high as 150-220 kg, which is difficult to promote due to the large amount

Method used

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  • Method for preparing siliceous fertilizer by using dregs of sodium sulphide and its application
  • Method for preparing siliceous fertilizer by using dregs of sodium sulphide and its application
  • Method for preparing siliceous fertilizer by using dregs of sodium sulphide and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First, the soda sulfide and weathered coal are processed into powders with a weight ratio of 1:0.8 respectively into powders below 40 meshes, and then the soda sulfide and water are prepared into a slurry at a weight ratio of 1:0.8, and the weathered coal and water are mixed in a weight ratio of 1:0.8 Prepared into slurry;

[0023] Add the sulfide alkali slag slurry into the reaction kettle, raise the temperature to 75°C, gradually add the weathered coal slurry to mix under constant stirring, turn on the vacuum pump, feed steam to heat, the reaction kettle must be operated under negative pressure, and the reaction time is 3 Hours, PH5-7;

[0024] Put the reactant slurry into the storage tank, dry it with steam, pass it through a 40-mesh sieve, and granulate it to make granular fertilizer. After introducing negative pressure and low-temperature drying, it can be sieved and packaged. The final product has a pH of 5-7;

[0025] The product gas enters the waste gas absorpt...

Embodiment 2

[0035] First, the soda sulfide and weathered coal are processed into powders below 40 mesh according to the weight ratio of 1:1.0, and then the soda sulfide and water are prepared into slurry according to the weight ratio of 1:0.8, and the weathered coal and water are prepared according to the weight ratio of 1:0.8 Prepared into slurry;

[0036] Add the sulfide alkali slag slurry into the reaction kettle, raise the temperature to 80°C, gradually add the weathered coal slurry to mix under constant stirring, turn on the vacuum pump, feed steam to heat, the reaction kettle must be operated under negative pressure, and the reaction time is 4 Hours, PH5-7;

[0037] Put the reactant slurry into the storage tank, dry it with steam, pass through a 40-mesh sieve, and make granular fertilizer through granulation agent, introduce negative pressure and low-temperature drying, and then sieve and pack. The final product is PH6-7;

[0038] The product gas enters the waste gas absorption tan...

Embodiment 3

[0046] First, the soda sulfide and weathered coal are processed into powders below 40 mesh according to the weight ratio of 1:1.3, and then the soda sulfide and water are prepared into slurry according to the weight ratio of 1:0.8, and the weathered coal and water are prepared according to the weight ratio of 1:0.8 Prepared into slurry;

[0047] Add the sulfide alkali slag slurry into the reaction kettle, raise the temperature to 75°C, gradually add the weathered coal slurry to mix under constant stirring, turn on the vacuum pump, feed steam to heat, the reaction kettle must be operated under negative pressure, and the reaction time is 3 Hours, PH5-7;

[0048] Put the reactant slurry into the storage tank, dry it with steam, pass it through a 40-mesh sieve, pass it through a granulator to make granular fertilizer, introduce negative pressure and dry it at low temperature, and then sieve it for packaging. The final product is PH5-7;

[0049] The product gas enters the waste ga...

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Abstract

The present invention relates to a method and application of preparing silicon fertilizer by using alkali sulfide slag. The alkali sulfide slag and weathered coal are separately processed into powder, and then water is added to make slurry respectively. , under continuous stirring, gradually add weathered coal slurry to mix, pH5-7; put the reactant slurry into the storage tank, steam dry, sieve, and granulate to make granular fertilizer; the silicon fertilizer is used in Base fertilizer application for silicon-loving crops, such as rice, wheat, corn, sugarcane, tobacco, cotton, peanut, soybean, sweet potato, and various fruit trees, vegetables, tomatoes, etc. More than 40 kinds of crops. The difference between the present invention and other products of the same kind is that the silicon fertilizer is a product of neutral partial acidity, is easy to use in alkaline soil, and has the effect of improving saline-alkali land; it has been confirmed through field tests on paddy rice saline-alkali land: use 20 kg of vulcanized The silicon fertilizer prepared by alkali slag has a rice yield of 1360 catties per mu, an increase of 161%, and a seedling preservation rate of 100%.

Description

technical field [0001] The invention relates to a method and application for preparing silicon fertilizer from alkali sulfide slag, especially in rice Background technique [0002] Most of the production of soda sulfide uses coal to reduce anhydrous Glauber's salt. There is extremely serious slagging (one of three wastes) problems in this method. [0003] The largest amount of slag in the production of caustic soda is from pulverized coal, the water-insoluble matter in the raw material. The water-insoluble matter in anhydrous Glauber's salt is mainly composed of silicon dioxide and a small amount of iron oxide, calcium oxide and magnesium oxide. The chemical composition of ash in coal powder is: silicon dioxide, aluminum oxide, sulfur trioxide, iron oxide, calcium oxide, magnesium oxide, titanium dioxide, potassium oxide, sodium oxide, etc. The total ash content in coal varies from about 5.9% to 18% of the physical coal (dry basis). All these wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/04C05D9/00
Inventor 胡依理朱新珍刘月娥胡子昭
Owner 胡北晨
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