Soil conditioner as well as preparation method and application thereof

A technology of soil conditioner and activator, which is applied in the field of solid waste reuse, and can solve problems such as imperfect process, failure to consider heating and cooling of the reaction system, heat recovery and recycling product microscopic morphology regulation process technical problems, etc. Achieve the effect of improving soil air permeability, developing internal pore structure and reducing soil bulk density

Pending Publication Date: 2022-07-26
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the said invention only involves silicon, and does not involve other medium and trace elements necessary for plant growth, nor does it consider the technical issues

Method used

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  • Soil conditioner as well as preparation method and application thereof

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Example Embodiment

[0066] Example 1

[0067] The present embodiment provides a soil conditioner and a preparation method thereof, such as figure 1 As shown, the preparation method comprises the following steps:

[0068](1) Use fly ash from a power plant in Hulunbuir, Inner Mongolia, use calcium oxide as calcium source, and use manganese chloride and zinc chloride as activators; first add circulating solution (filtrate and washing liquid) to the batching tank, and add hydroxide Adjust the concentration of potassium to 0.5mol / L to prepare lye solution; add calcium oxide and fly ash to the lye solution according to the ratio of solid phase and liquid phase as 1kg: 13L, and ensure that silicon element and calcium oxide in fly ash are The molar ratio of calcium element is 1:0.9, and the activator is added according to 0.05% of the total mass of fly ash and calcium oxide, wherein the mass ratio of manganese chloride and zinc chloride is 3:1, and it is prepared after stirring evenly. raw pulp;

[00...

Example Embodiment

[0071] Example 2

[0072] The present embodiment provides a soil conditioner and a preparation method thereof, such as figure 1 As shown, the preparation method comprises the following steps:

[0073] (1) Use fly ash from a power plant in Hulunbuir, Inner Mongolia, take calcium oxide as calcium source and manganese chloride as activator; first add circulating solution (filtrate and washing liquid) to the batching tank, and add potassium hydroxide to adjust its concentration Calcium oxide and fly ash are added to the lye solution according to the ratio of solid phase and liquid phase as 1kg: 15L, and the silicon element in fly ash and calcium element in calcium oxide are ensured. The molar ratio is 1:0.7, and the activator is added according to 1% of the total mass of fly ash and calcium oxide, and the raw slurry is prepared after stirring evenly;

[0074] (2) The raw material slurry obtained in step (1) is sent into the primary heat exchanger with a diaphragm pump, and is ex...

Example Embodiment

[0076] Example 3

[0077] The present embodiment provides a soil conditioner and a preparation method thereof, such as figure 1 As shown, the preparation method comprises the following steps:

[0078] (1) Use fly ash from a power plant in Xilinhot, Inner Mongolia, use calcium hydroxide as calcium source, and use manganese nitrate and ferrous chloride as activators; first add circulating solution (filtrate and washing liquid) to the batching tank, and add hydrogen The concentration of potassium oxide is adjusted to 0.01mol / L to prepare lye; calcium hydroxide and fly ash are added to the lye solution according to the ratio of solid phase and liquid phase as 1kg: 20L, and it is ensured that the silicon element in the fly ash and the The molar ratio of calcium element in calcium hydroxide is 1:1, and the activator is added according to 2% of the total mass of fly ash and calcium hydroxide, wherein the mass ratio of manganese nitrate and ferrous chloride is 1:1, and stirring is un...

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Abstract

The invention provides a soil conditioner as well as a preparation method and application thereof, the preparation method comprises the following steps: (1) mixing fly ash, a calcium source, potassium hydroxide, an activating agent and water, and uniformly stirring to obtain raw slurry; and (2) carrying out hydrothermal reaction on the raw slurry obtained in the step (1) to obtain clinker slurry, and carrying out solid-liquid separation to obtain the soil conditioner. The soil conditioner is of a hollow porous structure; the specific surface area is 83.3-121.1 m < 2 >/g; and the porosity is 77.2 to 91.8 percent. According to the application, the soil conditioner is applied once every 1-5 years. The application amount each time is 5-500kg/mu; the fertilizer is applied to soil in a rotary tillage, ploughing, hole application or broadcast application mode, or is mixed with seeds and then sown into the soil. According to the preparation method of the soil conditioner, the beneficial element activation rate is increased, the product microstructure is improved, the soil conditioning function and effect are enhanced, the production cost is reduced, and continuous large-scale industrial production of the soil conditioner is achieved.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling, and relates to a soil conditioner, in particular to a soil conditioner and a preparation method and application thereof. Background technique [0002] Fly ash is the fly ash produced by burning coal at high temperature, and it has become one of the largest industrial solid wastes in China. At present, the annual output of fly ash in my country is about 600 million tons, and the comprehensive utilization rate is only about 70%. At present, the cumulative stock of fly ash in my country has exceeded 3 billion tons, occupying more than 1 million mu of land. In addition, due to the fine particles of fly ash, it is easy to fly with the wind, causing atmospheric dust pollution, and there is a greater safety hazard. Therefore, how to realize the bulk utilization of fly ash is an important problem that needs to be solved urgently. [0003] Soil conditioners are various materials used to m...

Claims

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Application Information

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IPC IPC(8): C09K17/06C09K17/08B09C1/08B09C1/00C09K109/00
CPCC09K17/06C09K17/08B09C1/08B09C1/00C09K2109/00
Inventor 马淑花何广礼王晓辉刘树森欧彦君石建萍王月娇周筱刘晨旭
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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