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Potassium sulfate and magnesium sulfate fertilizer production process having extrusion prilling step and no drying step

A potassium-magnesium sulfate fertilizer, extrusion granulation technology, applied in magnesium fertilizer, potash fertilizer, inorganic fertilizer and other directions, can solve the problems of small space for formula adjustment, unfavorable soil nutrients, easy moisture absorption and caking, etc. The effect of high fertilizer utilization rate and slow nutrient release

Inactive Publication Date: 2008-11-05
郭瑞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, the existing potassium and magnesium sulfate fertilizer products have fixed nutrients, and the formula adjustment space is small, which is not conducive to the balance of soil nutrients, and is easy to absorb moisture and agglomerate, making it difficult to store

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A process for producing potassium and magnesium sulfate fertilizer without drying by extrusion granulation, comprising the steps of:

[0021] 1. Prepare materials, mix potassium sulfate, magnesium sulfate pentahydrate, water retaining agent and medium and trace elements according to the weight ratio of 40:45:1:14, and stir fully and evenly; stir the uniform material with a bucket elevator Send to the feeding hopper, the material is sent to the feeding screw feeding hopper through the feeding hopper;

[0022] 2. Sheet rolling, the material is sent from the spiral hopper to the roller press for sheet rolling, the roll speed of the roller press: 16rpm, the power of the main engine: 22KW; the pre-loading pressure of the accumulator: 5Mpa; the forming pressure of the rolling sheet: 15Mpa ;Powder rolled sheet thickness: 8mm;

[0023] 3, chopped, the product obtained in step 2 is sent to a shredder for chopping;

[0024] 4. Grain granulation, the chopped product is granulate...

Embodiment 2

[0028] A process for producing potassium and magnesium sulfate fertilizer without drying by extrusion granulation, comprising the steps of:

[0029] 1. Prepare materials, mix potassium sulfate, magnesium sulfate pentahydrate, water retaining agent, and medium and trace elements according to the weight ratio of 55:30:0.1:14, and stir fully and evenly; stir the uniform material with a bucket elevator Send to the feeding hopper, the material is sent to the feeding screw feeding hopper through the feeding hopper;

[0030] 2. Sheet rolling, the material is sent from the spiral hopper to the roller press for sheet rolling, the roll speed of the roller press: 24rpm, the power of the main engine: 30KW; the pre-loading pressure of the accumulator: 8Mpa; the forming pressure of the rolling sheet: 30Mpa ;Powder rolled sheet thickness: 2mm;

[0031] 3, chopped, the product obtained in step 2 is sent to a shredder for chopping;

[0032] 4. Grain granulation, the chopped product is granul...

Embodiment 3

[0036] A process for producing potassium magnesium sulfate fertilizer through extrusion granulation without drying, the main steps are as follows:

[0037] 1. Prepare materials, mix potassium sulfate, magnesium sulfate pentahydrate, water-retaining agent and medium and trace elements according to the weight ratio of 46:35:0.6:18.4, and fully and evenly stir; the uniformly stirred materials are sent to The feeding hopper, the material is sent to the feeding screw feeding hopper through the feeding hopper;

[0038] 2. Sheet rolling, the material is sent from the screw hopper to the roller press for sheet rolling, the roll speed of the roller press: 30rpm, the power of the main engine: 30KW; the pre-loading pressure of the accumulator: 8Mpa; the forming pressure: 30 Mpa; powder Sheet thickness: 2mm;

[0039] 3, chopped, the product obtained in step 2 is sent to a shredder for chopping;

[0040] 4. Grain granulation, the chopped product is granulated, and the crushed particle si...

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Abstract

The invention relates to a technique for manufacturing magnesium potassium sulfate fertilizer by extrusion pelleting with no drying, which is characterized by: mixing lemery, anhydrous magnesium sulfate, water retention agent as well as medium elements and microelements according to the weight portions of 46:35:0.6:18.4; transmitting the mixture to a feed hopper after being fully stirred, then packaging the mixture into a finished product by rolling, cutting up, pelleting and sieving; the medium elements and the microelements include: zeolite powder, borax, zinc sulfate, bluestone and green copperas which are uniformly mixed according to the weight portions of 10 to 20: 1 to 3: 1 to 2.5: 0.1 to 1.5 : 0.1 to 1. The invention adopts the technique of extrusion pelleting and is added with a drought control water retention growth promoting agent; the produced multi-element magnesium potassium sulfate water retention fertilizer has the advantages of slow nutrient release, high fertilizer operating factor, easing resource shortage, reducing soil nutrient losing, protecting the underground water environment as well as being safe and environment protective. During the whole manufacture process, no water and no drying processes are educed, thus reducing power consumption and coal consumption during the drying and cooling processes; no contaminations of the three wastes are discharged during the manufacture process.

Description

technical field [0001] The invention relates to a production process of potassium magnesium sulfate fertilizer, in particular to a process for producing potassium magnesium sulfate fertilizer through extrusion granulation without drying. Background technique [0002] Potassium. With the continuous improvement of crop yield and nitrogen and phosphorus fertilizer application, the amount of potassium removed from the soil by crops is gradually increasing, and the amount returned to the soil in the form of organic manure, straw returning to the field, and application of potassium-containing chemical fertilizers cannot make up for the amount of potassium removed from the soil by crops. removal amount, the soil potassium in our country is gradually deficient. Since the 1980s, the farmland potassium balance in northern my country has been seriously unbalanced, the supply of potassium fertilizer is insufficient, the amount of organic fertilizer has decreased, the proportion of stra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05D11/00C05D1/02C05D5/00C05D9/02
Inventor 郭瑞
Owner 郭瑞
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