Application of serpentine magnesium extraction tailings in field of compound fertilizers, sandy land compound fertilizer and preparation method of sandy land compound fertilizer

A compound fertilizer, serpentine technology, applied in fertilizer mixture, application, inorganic fertilizer and other directions, can solve the problems of easy loss of nutrients with water, poor fertilizer absorption, poor fertilizer retention ability, and insufficient fertilization stamina.

Pending Publication Date: 2020-02-28
BEIJING OUFEI JINTAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sandy soil itself not only contains less nutrients, but also has poor fertilizer absorption and fertilizer retention capabilities, and the applied nutrients are easily lost with water; sandy soil has good air permeability, aerobic microbial activities are vigorous, nutrient conversion is fast, and the stamina of fertilization is insufficient

Method used

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  • Application of serpentine magnesium extraction tailings in field of compound fertilizers, sandy land compound fertilizer and preparation method of sandy land compound fertilizer
  • Application of serpentine magnesium extraction tailings in field of compound fertilizers, sandy land compound fertilizer and preparation method of sandy land compound fertilizer

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preparation example Construction

[0023] The present invention also provides a kind of preparation method of sandy land compound fertilizer, comprises the following steps:

[0024] Calcining after mixing the serpentine magnesium extraction tailings, KOH and solid phosphoric acid to obtain a calcined product;

[0025] The calcined product, coal slime, coal powder, water and water glass are mixed and then successively granulated and dried to obtain the compound fertilizer for sandy land.

[0026] The present invention mixes the tailings of magnesium extraction from serpentine, KOH and solid phosphoric acid and then calcines to obtain a calcined product.

[0027] In the present invention, the mass ratio of the serpentine magnesium extraction tailings, KOH and solid phosphoric acid is preferably 2-3: 0.5-1.5:0.5-1.5. In the present invention, the amount of KOH and solid phosphoric acid can make the aqueous solution of the calcined product neutral (pH 6.5-7.5), more preferably pH 7.

[0028] In the present invent...

Embodiment 1

[0053] First, the serpentine magnesium tailings (200 mesh), solid KOH (98%) (ground to 200 mesh), solid phosphoric acid (98%) (ground to 200 mesh) are mixed uniformly according to the mass ratio of 3: 1.5: 1.5, Then put it into a heating furnace (rotary kiln model SY2034) for calcination at a temperature of 750° C. and keep it for 2.5 hours to obtain a calcined product. The pH value of the aqueous solution of the calcined product is 7.

[0054] Grind the calcined product to 80 mesh, add coal slime with a fixed carbon content of 30% and low-quality coal powder (particle size 120 mesh), mix evenly, and the ratio is 1:1:1, add the calcined product, coal slime and Mix 4% water and 5% water glass of the total mass of inferior coal powder, granulate with a particle size of 1-3mm, and then dry and pack at 150°C to obtain compound fertilizer for sandy land. figure 2 It is the actual picture of the compound fertilizer for sandy land obtained.

[0055] The chemical composition of the ...

Embodiment 2

[0059] First, the serpentine extract magnesium tailings (200 mesh), solid KOH (98%) (ground to 200 mesh), solid phosphoric acid (98%) (ground to 200 mesh) are mixed uniformly according to the mass ratio of 2:0.5:0.5, Then put it into a heating furnace (rotary kiln model SY2034) for calcination at a temperature of 700° C. and keep it for 2.5 hours to obtain a calcined product. The pH value of the aqueous solution of the calcined product is 7.5.

[0060] Grind the calcined product to 80 mesh, add coal slime with a fixed carbon content of 30% and low-quality coal powder (particle size 120 mesh), mix evenly, and the ratio is 1:0.5:0.5, add the calcined product, coal slime and Mix 3% water and 2% water glass of the total quality of inferior coal powder, granulate with a particle size of 1-4mm, and then dry and pack at 200°C to obtain compound fertilizer for sandy land.

[0061] The chemical composition of the compound fertilizer for gained sandy land is analyzed, and the results ar...

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Abstract

The invention provides application of serpentine magnesium extraction tailings in the field of compound fertilizers, a sandy land compound fertilizer and a preparation method of the sandy land compound fertilizer, and belongs to the field of compound fertilizers. The invention provides the application of the serpentine magnesium extraction tailings in the field of fertilizers, and the serpentine magnesium extraction tailings are used for preparing the compound fertilizers, so that the serpentine magnesium extraction tailings are completely utilized, and the reutilization of resources is realized.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to the application of serpentine magnesium extraction tailings in the field of compound fertilizers, a compound fertilizer for sandy land and a preparation method thereof. Background technique [0002] There are a large amount of serpentine in my country, reaching the level of 100 billion tons, which is a good raw material for the production of metal magnesium. Moreover, there is also a large amount of laterite nickel ore in my country. The gangue mineral is serpentine type, which is also a good raw material for magnesium smelting. Therefore, when these serpentinite and laterite nickel ores are used to extract metal magnesium, a large amount of tailings will be generated. At present, there is no good treatment method for these tailings, which is not conducive to the recycling of resources. [0003] Sandy soil is widely distributed in inland desert areas or areas with severe win...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/80C05G3/70C05D3/04
CPCC05B17/00C05D3/04
Inventor 卢惠民卢小溪
Owner BEIJING OUFEI JINTAI TECH CO LTD
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