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Calcium magnesium phosphate fertilizer and production method thereof

A calcium magnesium phosphate fertilizer and a production method technology, applied in the field of fertilizer production, can solve the problems of high cost, low available phosphorus content, high energy consumption, etc., and achieve the effects of low cost, less investment, and low energy consumption

Inactive Publication Date: 2009-07-15
徐辉石
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The calcium magnesium phosphate fertilizer of this invention gained, the content of its available phosphorus is also lower (P 2 o 5 12-18%), and coke is used as raw material, which has high cost and high energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix 1 ton of ferrophosphorus and 2 tons of phosphate rock (powder ore), put the mixture in a high-temperature open hearth furnace, and raise the temperature of the mixture in the furnace to 2000°C by direct air blower, so that the phosphorus in the mixture is oxidized and burned, and the product is released from the furnace By quenching water, the semi-finished product of calcium magnesium phosphate fertilizer can be obtained, and finally the semi-finished product can be made into finished product of calcium magnesium phosphate fertilizer. Wherein, the phosphorus iron adopts the phosphorus iron containing 17-23% of phosphorus.

[0020] The above-mentioned process can convert 25-28% of the effective phosphorus components, and every 1 ton of semi-finished products can produce 2.5-3 tons of calcium-magnesium phosphate fertilizers qualified by the national standard.

Embodiment 2

[0022] Mix 1 ton of ferrophosphorus and 1.8 tons of phosphate rock (powder ore), put the mixture in a high-temperature open hearth furnace, and raise the temperature of the mixture in the furnace to 1800°C by direct air blower, so that the phosphorus in the mixture is oxidized and burned, and the product is released from the furnace By quenching water, the semi-finished product of calcium magnesium phosphate fertilizer can be obtained, and finally the semi-finished product can be made into finished product of calcium magnesium phosphate fertilizer. Wherein, the phosphorus iron adopts the phosphorus iron containing 17-23% of phosphorus.

Embodiment 3

[0024] Mix 1 ton of ferrophosphorus and 2.2 tons of phosphate rock (powder ore), put the mixture in a high-temperature open hearth furnace, and raise the temperature of the mixture in the furnace to 2200°C by direct air blower, so that the phosphorus in the mixture is oxidized and burned, and the product is released from the furnace By quenching water, the semi-finished product of calcium magnesium phosphate fertilizer can be obtained, and finally the semi-finished product can be made into finished product of calcium magnesium phosphate fertilizer. Wherein, the phosphorus iron adopts the phosphorus iron containing 17-23% of phosphorus.

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Abstract

The invention relates to a calcium-magnesia phosphate fertilizer and a production method thereof. The calcium-magnesia phosphate fertilizer is prepared by mixing ferrophosphorus and phosphorus ore according to the mass ratio of 1:1.8-2.2, placing the obtained mixture in a high-temperature open-hearth furnace for melting, and hardening the mixture. The production method of the calcium-magnesia phosphate fertilizer comprises the following steps: mixing the ferrophosphorus and the phosphorus ore according to the mass ratio of 1:1.8-2.2, placing the obtained mixture into the high-temperature open-hearth furnace for heating to 1800-2200 DEG C to oxidize and burn phosphor in the mixture, and performing furnace tapping on a product and hardening the product, thus obtaining a semi-finished product of the calcium-magnesia phosphate fertilizer, and finally making the semi-finished product into a finished product of the calcium-magnesia phosphate fertilizer. The phosphor in the mixture is oxidized and burned by the way of direct air blasting to raise the temperature of the high-temperature open-hearth furnace. The production method is adopted to produce the calcium-magnesia phosphate fertilizer with high phosphor conversion rate, resources saving and low energy consumption.

Description

technical field [0001] The invention belongs to the field of fertilizer production and relates to a calcium magnesium phosphate fertilizer and a production method thereof. Background technique [0002] The method for producing calcium magnesium phosphate fertilizer in existing blast furnace, its raw material adopts phosphate rock, dolomite and serpentine, and fuel adopts coke and coal, and production process is: raw material is crushed, and then the raw material after crushing is promoted and added in blast furnace, in Blast smelting in a blast furnace, and then high-pressure water quenching to obtain semi-finished products, which are reproduced to obtain calcium magnesium phosphate fertilizer. The disadvantages of this process are: large fixed investment, high production cost, complex process, low conversion rate of phosphorus in calcium magnesium phosphate fertilizer, high energy consumption and high pollution. [0003] The publication number is CN101113114, the applicati...

Claims

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Application Information

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IPC IPC(8): C05B21/00
Inventor 徐辉石
Owner 徐辉石
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