A kind of method for preparing silicon fertilizer from industrial waste residue

A technology of industrial waste residue and silicon fertilizer, which is applied in agriculture, fertilization device, fertilizer mixture, etc., to achieve the effect of fast heating rate, improvement of acid soil, and short reaction time

Active Publication Date: 2019-08-06
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] To sum up, the processes reported in the existing literature generally only aim at the direct utilization of water-soluble and citrate-soluble elements in manganese slag, especially manganese resources, but do not realize the resource utilization of silicon that exists in large quantities in the slag.

Method used

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  • A kind of method for preparing silicon fertilizer from industrial waste residue
  • A kind of method for preparing silicon fertilizer from industrial waste residue

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Embodiment 1

[0028] A method for preparing silicon fertilizer from industrial waste residues: adding electrolytic manganese slag, fly ash, sodium carbonate, and sodium hydroxide into a planetary ball mill at a ratio of 1:0.4:0.6:0.1, with a ball-to-material ratio of 5g / g, and a rotational speed of 150r / min, the ball milling time is 20min for mixing, put the mixed material into the porcelain boat, put it into the microwave high-temperature sintering furnace, the calcination temperature is 800 ℃, and the calcination time is 30min; after crushing, the fineness (by 250μm standard Sieve) ≥ 80%, effective silicon (as SiO 2 Silicon fertilizer products with a content of 21.05%, a pH of 9.87, and a moisture content of ≤3%.

[0029] The method for measuring the pH of silicon fertilizers is: NY / T 1377-2007 Determination of soil pH.

Embodiment 2

[0032] A method for preparing silicon fertilizer from industrial waste residues: adding electrolytic manganese slag, fly ash, sodium carbonate, and sodium hydroxide into a planetary ball mill at a ratio of 1:0.3:0.4:0.1, with a ball-to-material ratio of 8g / g and a rotational speed of 200r / min, the ball milling time is 40min for mixing, then put the mixed material into a porcelain boat, put it into a microwave high-temperature sintering furnace, the calcination temperature is 850°C, and the calcination time is 10min; after crushing, the fineness (through 250μm Standard sieve) ≥ 80%, effective silicon (as SiO 2 Silicon fertilizer products with a content of 20.59%, a pH of 10.53, and a moisture content of ≤3%.

Embodiment 3

[0034] A method for preparing silicon fertilizer from industrial waste residues: adding electrolytic manganese slag, fly ash, sodium carbonate, and sodium hydroxide into a planetary ball mill at a ratio of 1:0.5:0.5:0.1, with a ball-to-material ratio of 10g / g and a rotational speed of 250r / min, the ball milling time is 60min for mixing, then put the mixed material into a porcelain boat, put it into a microwave high-temperature sintering furnace, the calcination temperature is 750°C, and the calcination time is 60min; after crushing, the fineness (through 250μm Standard sieve) ≥ 80%, effective silicon (as SiO 2 A silicon fertilizer product with a content of 20.19%, a pH of 8.57, and a moisture content of ≤3%.

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Abstract

The invention relates to the technical field of recycling of industrial waste residues and discloses a method for preparing silicon fertilizers by using industrial waste residues. The preparation method comprises the following steps: adding electrolytic manganese residues, fly ash, sodium carbonate and sodium hydroxide in a planetary ball mill, ball-milling for 20-60 minutes at a rotating speed of 150-250 r / min according to the ball-material ratio of 5-10 g / g, uniformly mixing, then putting in a microwave high-temperature sintering furnace, controlling the temperature within 750-850 DEG C, calcining for 10-60 minutes and crushing to prepare the silicon fertilizers based on the industrial waste residues. The silicon fertilizers reach NY / T797-2004 silicon fertilizer standard of the Ministry of Agriculture of the People's Republic of China. The method disclosed by the invention has the benefits that a large quantity of electrolytic manganese residues can be effectively utilized, the production process is short, the operation is convenient, wastes are changed into valuables, and an effective way is provided for the resource utilization of the manganese residues.

Description

technical field [0001] The invention relates to the technical field of recovery and reuse of industrial waste residues, in particular to a method for preparing silicon fertilizer from industrial waste residues to realize harmless treatment of electrolytic manganese residues. Background technique [0002] Silicon is one of the main elements in the earth's crust. It mainly exists in the soil in various forms such as crystalline silicon, amorphous silicon and organic silicon. With the rapid development of modern agricultural technology, researchers have found that amorphous silicon and water-soluble silicon in soil can significantly increase the yield of crops, improve the lodging resistance, disease resistance, and drought resistance of crops, and promote the decomposition of organic fertilizers , Promote the effective use of nutrients, reduce or eliminate the hazards of harmful substances such as ferrous and methane, loosen the soil and prevent heavy metal pollution. However...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/04C05D9/00C05G3/80
CPCC05D9/00C05G3/80
Inventor 李佳杜冬云李金林叶恒朋彭秋菊
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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