Method for preparing multielement micropore mineral fertilizer from silicate rock through hydrothermal chemical reaction

A technology of chemical reaction and microporous minerals, which is applied in the field of mineral fertilizer production, can solve the problems of broken soil fertility coordination balance, biological growth, and low actual utilization rate, and achieve low-cost effects

Inactive Publication Date: 2009-06-10
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] But for a long time, the problem of unbalanced fertilization has been very prominent. Excessive application of nitrogen fertilizers has rarely supplemented mineral nutrients such as potassium, silicon, calcium, magnesium, iron and manganese. Long-term high yields have caused a large amount of potassium, silicon and other elements in the soil to be consumed. The coordinated balance of the diet is broken, and the comprehensive fertility continues to decline
[0005] The consequences of soil fertility imbalance are: 1) the actual utilization rate of nitrogen and phosphorus fertilizers is very low, and the nitrogen fertilizer is less than 30%, which not only limits the further increase of agricultural production, but also increases the cost of agricultural production, and also causes agricultural three-dimensional pollution; 2) Potassium silicon The shortage of quality elements such as calcium, magnesium and sulfur

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  • Method for preparing multielement micropore mineral fertilizer from silicate rock through hydrothermal chemical reaction
  • Method for preparing multielement micropore mineral fertilizer from silicate rock through hydrothermal chemical reaction

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preparation example Construction

[0036] In the preparation method of the present invention, the amount of water used is extremely important. Too little water cannot ensure the dissolution effect of various components, while too much water will reduce the processing capacity of materials, thereby reducing productivity. The amount of water used in the present invention is selected according to the amount of solid material, so that the solid material is in a semi-wet state. In the present invention, the amount ratio of water and solid materials, that is, the solid-to-liquid ratio, is 1:1-3, preferably 1:1.2-1.5.

[0037] In addition, the pressure in the reaction system is also important for hydrothermal reactions. In industrial production, steam can be introduced into the reaction system to keep the reaction pressure constant. Generally speaking, the higher the pressure, the more favorable the hydrothermal reaction will be. However, considering the equipment cost and the evaporation of existing water in the r...

Embodiment 1

[0048] 1) Selection of raw materials, including potassium-containing rocks and lime:

[0049] Potassium-containing silicate rock: collected from Nanshan, Miyun County, Beijing, its chemical composition (%) is as follows

[0050] SiO 2 TiO 2 AlO 3 Fe 2 o 3 +FeO MnO CaO MgO K 2 o Na 2 o P 2 o 5 Loss on ignition total 63.09 0.71 15.69 4.41 0.02 0.15 0.37 12.79 0.22 0.04 1.93 99.42

[0051] X-ray powder crystal diffraction analysis indicates that the potassium-bearing rock is mainly potassium feldspar, and the others are quartz.

[0052] Lime: Containing 97% CaO (chemically pure, Beijing Purchasing and Supply Station of Chinese Pharmaceutical Company).

[0053] 2) Production process:

[0054] (1) Crush the potassium-containing rock and lime to below 200 mesh respectively, first add 30ml of water to the plastic vessel, then add 5.000 grams of potassium-containing rock mineral powder and 5.000 grams of lime powder to th...

Embodiment 2

[0059] 1) Selection of raw materials, including potassium-containing rocks, lime and gypsum:

[0060] Potassium-containing silicate rock: collected from Nanshan, Miyun County, Beijing, its chemical composition (%) is as follows

[0061] SiO 2 TiO 2 AlO 3 Fe 2 o 3 +FeO MnO CaO MgO K 2 o Na 2 o P 2 o 5 Loss on ignition total 63.09 0.71 15.69 4.41 0.02 0.15 0.37 12.79 0.22 0.04 1.93 99.42

[0062] X-ray powder crystal diffraction analysis indicates that the potassium-bearing rock is mainly potassium feldspar, and the others are quartz.

[0063] Lime: containing 97% CaO (chemically pure, purchased from Beijing Supply Station of Chinese Pharmaceutical Company).

[0064] Gypsum: collected from the Xiazigai bentonite mining area in Xinjiang and Buxar County, it is transparent gypsum with good crystallization, heated in a laboratory oven at 120°C for 1 hour to obtain hemihydrate gypsum (CaSO 4 1 / 2H 2 O).

[0065] 2) Pro...

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Abstract

The invention provides a method for preparing multi-element microporous mineral fertilizer from silicate rocks through a hydrothermal chemical reaction. The method is characterized in that the hydrothermal chemical reaction is carried out in a semi-wet state after the silicate rocks and fine powder of an alkali soil excitant and an activator, thereby wholly converting minerals in the silicate rocks into effective forms which can be absorbed by plant with high efficiency (65 to 85 percent); and the fertilizer has unique microporous structures and becomes the multi-element microporous mineral fertilizer.

Description

technical field [0001] The invention belongs to the field of mineral fertilizer production, and in particular relates to a method for preparing multi-element microporous mineral fertilizer from silicate rock by hydrothermal chemical reaction in a semi-humid state. Background technique [0002] Plant growth requires not only nitrogen, phosphorus and potassium, but also medium elements such as silicon, calcium, magnesium, sulfur, and trace elements such as iron, manganese, boron, and rare earth, and each essential nutrient element has its special function and cannot be taken replaced by other elements. [0003] Various fertility factors in soil are not isolated, but interrelated and restrict each other. According to the law of minimum nutrient, the yield of crops mainly depends on the supply of the least amount of nutrients in the soil (similar to the barrel theory, the water storage capacity of the barrel depends on the height of the shortest plank), the shortage of potassiu...

Claims

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Application Information

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IPC IPC(8): C05D9/00
CPCC05D9/00
Inventor 韩成刘建明
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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