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Method for preparing mineral type potassium-magnesium-silicon slow-release fertilizer from nephrite tailings

A slow-release fertilizer and tailings technology, applied in application, fertilization device, fertilizer mixture, etc., can solve the problems of low fertilizer use efficiency and the accumulation of lost fertilizer

Pending Publication Date: 2022-07-29
河北地质大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the use of traditional instant fertilizers, due to the leaching of precipitation, the actual fertilizer use efficiency is low. At the same time, the lost fertilizers gather in the water body, which may cause environmental problems such as eutrophication. It is coated, and there are not many reports on mineral-type slow-release fertilizers. Silicate minerals are the main component of soil. Therefore, silicate mineral-type slow-release fertilizers have better environmental compatibility than traditional chemical fertilizers.

Method used

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  • Method for preparing mineral type potassium-magnesium-silicon slow-release fertilizer from nephrite tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] S1: First prepare the raw materials, 3.30 parts of nephrite tailings, 0.1 part of quartz sand and 3.77 parts of potassium carbonate, and use clean water to wash the prepared raw materials. After the raw materials are cleaned, use a dryer to remove the nephrite tailings, quartz sand and Potassium carbonate drying;

[0022] S2: Put the designed raw material components into the ball mill, take out the powder after mixing for 5 minutes, and conduct sampling inspection on the taken out powder. Raw materials with larger particles;

[0023] S3: Put the treated powder into an alumina dry pot, and put it into a high-temperature melting furnace for sintering. After sintering, take out the sintered sample, control the sintering temperature at 850°C, control the holding time at 2h, and use X The sintered samples were analyzed by a ray powder crystal diffraction device;

[0024] S4: The sintered sample is pulverized, and sample particles are produced by a granulator, and the produ...

Embodiment 2

[0026] S1: First prepare the raw materials, 4 parts of nephrite tailings, 3 parts of quartz sand and 4.5 parts of potassium carbonate, and wash the prepared raw materials with clean water. After the raw materials are cleaned, use a dryer to remove the nephrite tailings and quartz sand. dried with potassium carbonate;

[0027] S2: Put the designed raw material components into the ball mill, take out the powder after mixing for 6 minutes, and conduct sampling inspection on the taken out powder. Raw materials with larger particles;

[0028] S3: Put the treated powder into an alumina dry pot, and put it into a high-temperature melting furnace for sintering. After sintering, take out the sintered sample, control the sintering temperature at 900°C, control the holding time at 2.5h, and use The sintered samples were analyzed by X-ray powder crystal diffraction device;

[0029] S4: The sintered sample is pulverized, and sample particles are produced by a granulator, and the produced...

Embodiment 3

[0031] S1: First prepare the raw materials, 5.00 parts of nephrite tailings, 3.04 parts of quartz sand and 5.72 parts of potassium carbonate, and wash the prepared raw materials with clean water. After the raw materials are cleaned, use a dryer to remove the nephrite tailings and quartz sand. dried with potassium carbonate;

[0032] S2: Put the designed raw material components into the ball mill, take out the powder after mixing for 7 minutes, and conduct sampling inspection on the taken out powder. Raw materials with larger particles;

[0033] S3: Put the treated powder into an alumina dry pot, and put it into a high-temperature melting furnace for sintering. After sintering, take out the sintered sample. The sintered samples were analyzed using an X-ray powder crystal diffraction apparatus;

[0034] S4: The sintered sample is pulverized, and sample particles are produced by a granulator, and the produced sample particles are weighed and packaged.

[0035] Combined with th...

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Abstract

The invention discloses a method for preparing a mineral type potassium-magnesium-silicon slow-release fertilizer by using nephrite tailings, which comprises the following steps: S1, preparing raw materials, namely 3.30-5.00 parts of nephrite tailings, 0-3.04 parts of quartz sand and 3.77-5.72 parts of potassium carbonate, cleaning the prepared raw materials by using clear water, and after the raw materials are cleaned, drying the nephrite tailings, the quartz sand and the potassium carbonate by using a drying machine to obtain dried nephrite tailings, quartz sand and potassium carbonate; s2, putting the designed raw material components into a ball mill, mixing for 5-7 minutes, then taking out powder, carrying out sampling detection on the taken-out powder, and after sampling detection, screening the powder through a screening device to ensure that no large-particle raw material exists, S3 and S4. The potassium, magnesium, calcium and silicon compounds are prepared by mixing and sintering the raw materials, the potassium element can be properly limited in a silicate skeleton structure, and meanwhile, elements in the tailings are properly activated, so that the effect of releasing the potassium, magnesium, calcium and silicon elements for a long time is achieved, the utilization rate of the fertilizer is improved, and high-value comprehensive utilization of the nephrite tailings is realized.

Description

technical field [0001] The invention relates to the technical field of preparation of slow-release fertilizers from nephrite tailings, in particular to a method for preparing mineral-type potassium-magnesium-silicon slow-release fertilizers from nephrite tailings. Background technique [0002] During the use of traditional instant fertilizers, due to the leaching effect of precipitation, the actual fertilizer use efficiency is low. At the same time, the lost fertilizers accumulate in the water body, which may bring environmental problems such as eutrophication. The usual slow-release fertilizers are mainly It is a coating type. There are not many reports on mineral slow-release fertilizers. Silicate minerals are the main components of soil. Therefore, silicate mineral slow-release fertilizers have better environmental compatibility than traditional chemical fertilizers. . Nitrogen, phosphorus and potassium are the three main nutrients required for plant growth. In addition,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/40C05G5/12
CPCC05G3/40C05G5/12C05D1/00C05D9/00C05G1/00
Inventor 陶隆凤刘昶江韩秀丽史淼金翠玲
Owner 河北地质大学
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