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Preparation for slow release glass potassic fertilizer by smelting iron and steel fag-end

A slow-release, waste-residue technology, applied in the direction of potash fertilizer, application, inorganic fertilizer, etc., can solve the problems of dissolution performance change, unstable fertilizer composition, dissolution composition variation, etc., to achieve small impact, good slow-release effect, The effect of stable ingredients

Inactive Publication Date: 2005-02-23
上海维安新材料研究中心有限公司
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Problems solved by technology

In addition, this type of sinter is due to the SiO in fly ash 2 、Al 2 o 3 , Fe 2 o 3 Oxides and alkaline earth oxides may form various crystals, and then the dissolution properties will change in various ways. During the dissolution process, the dissolved components will vary, and the fertilizer components cannot be given stably.
In addition, the firing conditions, raw material ratio, and the type and proportion of the generated crystals can change for the fly ash raw materials in different regions, which become problems and difficulties in the preparation

Method used

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  • Preparation for slow release glass potassic fertilizer by smelting iron and steel fag-end

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[0015] The method for preparing slow-release glass potash fertilizer by using smelting iron and steel waste slag, using smelting iron and steel waste slag as the main raw material, introducing a certain amount of potassium salt such as K 2 CO 3 , after melting into glass liquid, cool it slowly, and keep it warm at 900-1150°C to precipitate K in the glass 2 Ca 2 Si 2 o 7 Crystals, which can dissolve K in water. According to the design of chemical composition, the water solubility is between 1% and 3% depending on the holding temperature and holding time, and the remaining K 2 O can be slowly dissolved in citric acid secreted by plant roots.

[0016] Dissolve 1 g of the above-mentioned product with a particle size of 2 to 4 mm in 10 ml of 2% ammonium citrate solution for 15 minutes. After shaking, take out the clear liquid and analyze the K in the solution with an atomic absorption instrument. + content. After taking out the clarified liquid every time, replenish it to 10...

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Abstract

A slow-releasing glass potassium fertilizer is prepared from the slag generated by smelting iron and steel through mixing it with KOH or K2CO3, smelting to become glass-state molten material, solidifying, and slow cooling.

Description

Technical field [0001] The invention utilizes iron and steel smelting waste slag to prepare slow-release glass potassium fertilizer, and relates to a slow-release glass potassium fertilizer prepared by smelting iron and steel waste slag and a preparation method thereof. The fertilizer has slow-release properties, which can avoid the rapid loss of potassium in the soil and the compaction of the soil. It can be used as fertilizer for vegetables, rice and other crops. Background technique [0002] Fertilizers are indispensable for plant growth, of which there are mainly three main components: N, P, and K. Ordinary chemical fertilizers are absorbed by plants within a few days to several weeks after watering, but during this time these chemical fertilizers are easily dissolved in water and most of them will be lost, and they will also cause soil compaction. Potassium fertilizer, as the main nutrient for plant growth, only needs a small amount in the early stage of plant growth,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05D1/00
Inventor 李启甲吴则嘉张林春
Owner 上海维安新材料研究中心有限公司
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