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A kind of red mud silicon calcium potassium fertilizer and preparation method thereof

A technology of red mud and silicon-calcium, which is applied to potash fertilizers, calcium fertilizers, inorganic fertilizers, etc., can solve the problems of low effective silicon content and failure to achieve expected results, achieve high silicon content, save drying process and costs, and reduce energy consumption. consumption effect

Active Publication Date: 2021-08-10
CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there have been tests of using red mud and fly ash as silicon fertilizer respectively, the test did not achieve the expected results. The reason is that most of the silicon in red mud and fly ash is glassy and mineral silicon, which can The effective silicon content absorbed by plants is very small, such as SiO in fly ash 2 As high as 50% to 60%, but the effective silicon that can be absorbed by plants is only 1% to 2%

Method used

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  • A kind of red mud silicon calcium potassium fertilizer and preparation method thereof
  • A kind of red mud silicon calcium potassium fertilizer and preparation method thereof
  • A kind of red mud silicon calcium potassium fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1) Weigh red mud, fly ash and desulfurization slag according to the mass percentage of 27%: 53%: 20%, and mix them uniformly to obtain a mixture;

[0043] 2) Take by weighing potassium hydroxide equivalent to 8% of the mass of the mixture, dissolve it in water equivalent to 20% of the quality of the mixture, add the potassium hydroxide solution to the mixture obtained in step 1), mix evenly, and carry out the Granulating (the grain that makes is cylindrical, and thickness is 3mm, and diameter is 1cm), obtains granular material;

[0044] 3) The obtained pellets are placed in dry powder ((composed of red mud, fly ash and desulfurization slag at a mass percentage of 27%: 53%: 20%)) to allow the pellets to fully contact with the dry powder, so that the surface of the pellets is wrapped with a Layer dry powder to obtain granules after powder makeup;

[0045] 4) The obtained powdered granular material is placed in a porcelain crucible and then roasted in a muffle furnace. Th...

Embodiment 2

[0050] 1) Weigh red mud, fly ash and desulfurization slag according to the mass percentage of 25%: 50%: 25%, and mix them uniformly to obtain a mixture;

[0051] 2) Take by weighing potassium hydroxide equivalent to 15% of the mass of the mixture, dissolve it in water equivalent to 20% of the quality of the mixture, add the potassium hydroxide solution to the mixture obtained in step 1), mix evenly, and carry out the Granulating (the grain that makes is cylindrical, and thickness is 3mm, and diameter is 1cm), obtains granular material;

[0052] 3) The obtained granules are placed in dry powder (fly ash) so that the granules are in full contact with the dry powder, so that the surface of the granules is coated with a layer of dry powder, and the powdered granules are obtained;

[0053] 4) The obtained powdered granular material is placed in a porcelain crucible and then roasted in a muffle furnace. The maximum furnace temperature is set to 600°C. After reaching 600°C, it is kep...

Embodiment 3

[0058] 1) Weigh red mud, fly ash and desulfurization slag according to the mass percentage of 25%: 50%: 25%, and mix them uniformly to obtain a mixture;

[0059] 2) Take by weighing potassium hydroxide equivalent to 20% of the mass of the mixture, dissolve it in water equivalent to 20% of the quality of the mixture, add the potassium hydroxide solution to the mixture obtained in step 1), mix evenly, and place the obtained material Carry out granulation in granulator (the granulation that makes is cylindrical, and thickness is 3mm, and diameter is 1cm), obtains granulate;

[0060] 3) The obtained granules are placed in dry powder (fly ash) so that the granules are in full contact with the dry powder, so that the surface of the granules is coated with a layer of dry powder, and the powdered granules are obtained;

[0061] 4) The powdered granular material obtained is placed in a porcelain crucible and then roasted in a muffle furnace. The maximum furnace temperature is set to 70...

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Abstract

The invention discloses a red mud silicon calcium potassium fertilizer and a preparation method thereof. The preparation method of the red mud silicon calcium potassium fertilizer comprises the following steps: 1) weighing 20% ​​to 50% of red mud, 30% to 60% of fly ash and 5% to 30% of desulfurization residue , and mix uniformly to obtain a mixture; 2) Weigh potassium hydroxide equivalent to 2% to 30% of the mixture mass, make a solution with water as a solvent, add it to the obtained mixture, mix uniformly, and granulate the obtained material , to obtain the granular material; 3) the gained granular material is placed in the dry powder and the granular material is fully contacted with the dry powder, so that the surface of the granular material is wrapped with a layer of dry powder to obtain the granular material after the powder makeup; 4) the granular material after the gained powder makeup is placed in Calcined under the condition of ≥450℃, after the calcination is completed, cool to obtain. The method of the invention is simple and easy to control, has low cost, and the prepared red mud silicon calcium potassium fertilizer has low content of free sodium and high content of soluble silicon.

Description

technical field [0001] The invention relates to a red mud silicon-calcium-potassium fertilizer and a preparation method thereof, belonging to the field of comprehensive utilization of solid waste. Background technique [0002] Aluminum metal is widely used for its light weight, good electrical and thermal conductivity, high reflectivity and oxidation resistance. Its output is second only to steel and occupies the first place in the output of non-ferrous metals. The output of alumina as a raw material for aluminum metal has been constantly hitting new highs in recent years. According to Moshang.com, since 2018, the global average daily output of alumina has been around 330,000 tons, of which my country's alumina output in April 2018 reached 5.9 million tons , ranking first in the world. [0003] Red mud, so named because it looks like red clay. Alumina production enterprises commonly use Bayer method, sintering method or combined method to produce alumina, but no matter whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/80
CPCC05D1/00C05G3/80C05D3/04C05D9/00
Inventor 张健伟甘可冷杰彬
Owner CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD
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