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Method for preparing vermiculite-based silicon-potassium fertilizer by vermiculite modification

A technology of vermiculite modification, which is applied in the field of vermiculite modification to prepare vermiculite-based silicon-potassium fertilizer, which can solve the problems of uneven silicon fertilizer products and achieve good ventilation, low production cost and environmental friendliness

Inactive Publication Date: 2018-06-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] my country's silicon fertilizer market has great potential. At present, various industrial solid wastes (such as blast furnace slag, coal gangue, yellow phosphorus slag, phosphogypsum, etc.) and minerals (such as limestone, medical stone, potassium feldspar, etc.) Silicon fertilizer is prepared from raw materials, and the products of silicon fertilizer are uneven. Moreover, it is difficult to avoid harmful elements such as heavy metals exceeding the standard by using industrial waste residue as raw material

Method used

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  • Method for preparing vermiculite-based silicon-potassium fertilizer by vermiculite modification

Examples

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Effect test

Embodiment 1

[0026] A method for preparing vermiculite-based silicon-potassium fertilizer (soil conditioner) by modifying vermiculite, such as figure 1 shown, including the following steps:

[0027] (1) Preparation of raw materials: obtain high-quality vermiculite raw materials with heavy metal ions and harmful elements not exceeding the standard through selection or beneficiation, choose a vermiculite concentrate in Henan, the ore contains SiO 2 Mass percentage content 36.48%, CaO mass percentage content 10.48%, MgO mass percentage content 14.64%, K 2 O mass percentage content 5.13%, Al 2 o 3 Mass percentage content 6.60%, Fe 2 o 3 The mass percentage content is 6.13%. After grinding, grading and dehydration, the particle size after grinding is -200 mesh, which is 80% (mass percentage), and the mass percentage of moisture after dehydration is 15%. The particle size and moisture meet the ingredients requirements;

[0028] (2) Ingredients: Weigh the vermiculite and alkali dehydrated in...

Embodiment 2

[0032] A method for preparing vermiculite-based silicon-potassium fertilizer (soil conditioner) by modifying vermiculite, comprising the following steps:

[0033] (1) Preparation of raw materials: High-quality vermiculite raw materials with heavy metal ions and harmful elements not exceeding the standard are obtained through sorting or beneficiation. In a rutile mine in Shaanxi, vermiculite is the main gangue mineral, accounting for 60% of the total mineral mass. %-70%, followed by dolomite, feldspar, chlorite, etc., using gravity separation, magnetic separation and other conventional combined processes to obtain rutile concentrate, the tailings contain SiO 2 Mass percentage content 37.34%, CaO mass percentage content 17.95%, MgO mass percentage content 10.95%, K 2 O mass percentage content 1.03%, Al 2 o 3 Mass percentage content 8.60%, Fe 2 o3 The mass percentage content is 5.82%. After grinding, grading and dehydration, the particle size after grinding is -200 mesh, which...

Embodiment 3

[0039] A method for preparing vermiculite-based silicon-potassium fertilizer (soil conditioner) by modifying vermiculite, comprising the following steps:

[0040] (1) Preparation of raw materials: High-quality vermiculite raw materials with heavy metal ions and harmful elements not exceeding the standard are obtained through sorting or beneficiation. A vermiculite concentrate in Xinjiang contains SiO 2 The mass percentage content is 36.48%, the CaO mass percentage content is 8.32%, the MgO mass percentage content is 12.37%, K 2 O mass percentage content 7.14%, Al 2 o 3 Mass percentage content 7.43%, Fe 2 o 3 The mass percentage content is 6.42%. After grinding, grading and dehydration, the particle size after grinding is -200 mesh, which is 70% (mass percentage), and the mass percentage of moisture after dehydration is 25%. The particle size and moisture meet the ingredients requirements;

[0041] (2) Ingredients: Weigh the vermiculite and alkali dehydrated in step (1) acc...

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Abstract

The invention discloses a method for preparing vermiculite-based silicon-potassium fertilizer by vermiculite modification. Vermiculite and alkali are subjected to a reaction under the condition of high-temperature roasting, silicon, calcium, magnesium and potassium in vermiculite and added potassium are converted into effective silicon, effective calcium, effective magnesium and effective potassium which are soluble in organic acids secreted by plants, absorption by crops is facilitated, and special properties of good ventilation, water storage and the like of the vermiculite which expands after being roasted are obtained after application to soil; the vermiculite raw material with heavy metal ion and harmful element content not exceeding the standard is obtained by sorting or beneficiation, different grades of novel vermiculite-based silicon-potassium fertilizer with high content of effective silicon, effective calcium, and effective magnesium and effective potassium can be obtained by changing the amount and proportion of alkali in the roasting process. The method has the characteristics of simple process flow, wide raw material source, low production cost, no environmental pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of mineral processing engineering, and specifically relates to a method for preparing vermiculite-based silicon-potassium fertilizer by modifying vermiculite. Background technique [0002] "Food is the sky of the people, and soil is the foundation of food." In recent years, with the rapid development of China's agriculture, the agricultural resources and environment are also changing, especially the changes in the soil environment. The soil compaction and soil-borne diseases caused by crop continuous cropping continue to aggravate; Imbalances in the ratio of various nutrient elements; unreasonable use of chemical fertilizers lead to soil acidification and soil salinization, all of which pose a threat to the sustainable development of China's agriculture. Accompanying this is the increasingly acute contradiction between population, resources, and the environment. The people's desire for food safety also make...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/80
CPCC05D1/00C05G3/80C05D3/02C05D5/00C05D9/00
Inventor 高利坤戴惠新陈云饶兵马方通王鹏
Owner KUNMING UNIV OF SCI & TECH
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