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

A technology of alkali sulfide and silicon fertilizer, applied in the preparation/purification of sulfur, etc., can solve the problems of large amount, difficult to popularize, and extensive silicon fertilizer.

Inactive Publication Date: 2003-07-23
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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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

[0034] 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;

[0035] 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;

[0036] 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;

[0037] The product gas enters the waste gas absorption tan...

Embodiment 3

[0045] 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;

[0046] 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;

[0047] 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;

[0048] The product gas enters the waste ga...

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PUM

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Abstract

A process for preapring Si fertilizer includes respectively pulverizing the sulfurized alkali dregs and weathered coal, preparing their shurries by adding water, heating the slurry of sulfurized alkali dregs which adding the slurry of weathered coal under stirring, regulating pH to 5-7, baking by steam, sieving Si preferable agricultural crops. its advantages are high yield of crops and high effect on improving soil.

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 water-...

Claims

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Application Information

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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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