Low-chloride phosphorus potassium fertilizer and preparation method thereof

A technology for low-chlorine-phosphorus-potassium fertilizer and chlorine-based fertilizer, applied in the field of low-chlorine-phosphorus-potassium fertilizer and its preparation, can solve the problems of high total nutrients of fertilizers, single phosphorus fertilizer nutrients, complicated preparation process, etc. low content effect

Inactive Publication Date: 2009-09-09
中国-阿拉伯化肥有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The preparation process of the above-mentioned process method is relatively complicated, and the phosphate fertilizer nutrient obtained is relatively simple, so a method for directly producing phosphorus and potassium fertilizer from potassium chloride and phosphate rock powder is developed to simplify the process, and the obtained fertilizer has high total nutrients and chlorine content. Low, while containing the necessary macroelements of two kinds of crops, phosphorus and potassium, has become an urgent problem to be solved in this technical field

Method used

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  • Low-chloride phosphorus potassium fertilizer and preparation method thereof

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Effect test

Embodiment 1

[0040] like figure 1 Shown is a schematic flow chart of the method of this embodiment. In the figure, 1 is potassium chloride, 2 is phosphate rock powder, 3 is quartz sand, 4 is potassium feldspar, 5 is boric anhydride, 6 is coal burning; 7 is bucket elevator, 8 is blast furnace, and 9 is water quenching tank , 10 is the crusher, 11 is the hot blast stove, 12 is the tail gas washing system, 13 is the fan, 14 is the blast furnace tail gas, 15 is the hot blast stove tail gas, 16 is the preheated air and water vapor, 17 is the water vapor produced by water quenching, 18 is high-temperature melt slurry, 19 is phosphorus and potassium fertilizer particles after water quenching, and 20 is atomized heavy oil or natural gas.

[0041] Phosphate rock powder is 10.1 tons / hour, quartz sand is 2.4 tons / hour, potassium chloride is 4.5 tons / hour, potassium feldspar is 0.5 tons / hour, boric anhydride is 0.2 tons / hour, and coal is 4.2 tons / hour. After mixing, it is sent to the top of blast fu...

Embodiment 2

[0043] Phosphate rock powder is mixed at 10.1 tons / hour, quartz sand is 2.8 tons / hour, potassium chloride is 3.5 tons / hour, potassium-containing sandstone is 0.6 tons / hour, boric anhydride is 0.6 tons / hour, and these raw materials are mixed and fed by bucket elevator 7 There are 8 material inlets in the open hearth furnace. Natural gas is mixed and burned at the entrance of the open hearth furnace at 3.0 tons / hour, oxygen-enriched air and water vapor (introduced at 0.8 tons / hour). The high temperature gas melts the mixed materials and reacts. , The average residence time of the reaction materials in the open hearth furnace is 10 hours. The high-temperature molten slurry is quenched with water, and after solidification, it is crushed and packaged to become the finished phosphorus and potassium fertilizer. K 2 O% content 17.5%, P 2 o 5 % content 23.4%.

Embodiment 3

[0045] Phosphate rock powder is mixed at 10.1 tons / hour, diatomite is 3.5 tons / hour, potassium chloride is 5.0 tons / hour, alunite is 2.0 tons / hour, and boric anhydride is 1.0 tons / hour. 8 material inlets of the electric furnace are fed with steam at 1.0 tons / hour. The temperature of the electric furnace is controlled at 1600°C, and the average residence time of the reaction materials in the open hearth furnace is 3.0 hours. The high-temperature molten slurry is quenched with water, and after solidification, it is crushed and packaged to become the finished phosphorus and potassium fertilizer. K 2 O% content 18.0%, P 2 o 5 % content 17.5%.

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Abstract

The invention relates to a low-chloride phosphorus potassium fertilizer and a preparation method thereof, in particular to a method for preparing the low-chloride phosphorus potassium fertilizer by melting and sintering potassium chloride, phosphorite powder and quartz sand, and the invention belongs to the production field of phosphorus potassium compound fertilizer. In the method, the potassium chloride, the phosphorite powder, the quartz sand or diatomite, insoluble potassic ore and boric anhydride are used as raw materials; coal, heavy oil or natural gas are used as fuel; or an electric cooker is used as a high-temperature heat source; and the phosphorus potassium fertilizer is produced by melting and sintering in steam atmosphere. The reaction is carried out in a blast furnace, an open hearth or the electric cooker, and the melting temperature is 800-1600 DEG C. The method produces the phosphorus potassium fertilizer by the potassium chloride and the phosphorite powder directly and has simplified process; the prepared phosphorus potassium fertilizer has high total nutrient and the low content of chloride and can be used for chlorophobic crops; the phosphorus potassium fertilizer contains two elements of phosphor and potassium required by the crops in large amount at the same time; the percentage content of K2O is 10%-18%; the percentage content of P2O5 is 15%-30%; the content of chlorine ion is less than 3%; and the total nutrient is 30%-45%.

Description

technical field [0001] The invention relates to a low-chlorine phosphorus-potassium fertilizer and a preparation method thereof, in particular to a method for preparing a low-chlorine phosphorus-potassium fertilizer by melting and sintering potassium chloride, phosphate rock powder and quartz sand, and belongs to the field of production of phosphorus-potassium compound fertilizers. Background technique [0002] Traditional thermal phosphate fertilizers are mainly calcium magnesium phosphate fertilizers, a small amount of calcium sodium phosphate fertilizers and defluorinated phosphate fertilizers. The process is characterized by mixing phosphate rock powder, flux and coal, and sending it into a blast furnace, open hearth furnace or electric furnace through a bucket elevator to form a high-temperature melt at 1000-1500 ° C. The melt is quenched with water and ground to become a finished product. Phosphate fertilizer. According to different raw materials and processes, the so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05D1/00C05B17/00
CPCY02P20/129
Inventor 马凯马培华王金铭郑秀兴贲艳英
Owner 中国-阿拉伯化肥有限公司
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