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Preparation method of raw material phosphate ores for yellow phosphorus production

A phosphate rock and raw material technology, applied in the field of phosphorus chemical industry, can solve the problems of low removal rate, low spheroidization rate, high investment and power consumption, and achieve the effects of reducing CO2 content, improving product quality, and reducing silica consumption.

Inactive Publication Date: 2015-03-25
YIBIN TIANYUAN GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The pelletizing method has higher requirements on the raw materials of phosphate rock, and the ore needs to be dried and pulverized, and the investment and power consumption are higher; for the phosphate rock with higher carbonate content, due to the CO 2 The removal rate is low, and the power consumption of yellow phosphorus is correspondingly high; sodium silicate and the like need to be added as binders during pelletizing, and the production cost is high; the quality of yellow phosphorus products is greatly affected after the addition of organic binders; low ball rate

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  • Preparation method of raw material phosphate ores for yellow phosphorus production

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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the materials are prepared as follows: 960Kg of phosphate ore with a grade of 23%, with a carbon content of 8% and a water content of 6%.

[0038] The preparation method is as follows:

[0039] Step 1: Add the weighed phosphorite ore into the mixer, add the weighed anthracite, start the mixer for mixing, and spray an appropriate amount of atomized water when mixing.

[0040] Step 2: The uniformly mixed raw materials are put into the box-type sintering machine through the conveyor to ensure the smoothness of the material surface, and the thickness of the raw materials is 350mm. After the material layer is laid, the coal particles are laid out.

[0041] Step 3: use the igniter to ignite the coal particles on the surface of the fuel bed, start the exhaust fan, and open the exhaust valve after the negative pressure of the exhaust fan is stable at -8.5kpa, and the sintering starts. The temperature of the raw materials in the box-type sintering ma...

Embodiment 2

[0046] Such as figure 1 As shown, the materials are prepared as follows: 960Kg of phosphate ore with a grade of 23%, with a carbon content of 7% and a water content of 9%.

[0047] The preparation method is as follows:

[0048] Step 1: Add the weighed phosphorite ore into the mixer, add the weighed anthracite, start the mixer for mixing, and spray an appropriate amount of atomized water when mixing.

[0049] Step 2: The uniformly mixed raw materials are put into the box-type sintering machine through the conveyor to ensure the smoothness of the material surface, and the thickness of the raw materials is 350mm. After the material layer is laid, the coal particles are laid out.

[0050] Step 3: use the igniter to ignite the coal particles on the surface of the fuel bed, start the exhaust fan, and open the exhaust valve after the negative pressure of the exhaust fan is stable at -8.5kpa, and the sintering starts. The temperature of the raw materials in the box-type sintering ma...

Embodiment 3

[0055] Such as figure 1 As shown, the materials are prepared as follows: 960Kg of phosphate ore with a grade of 23%, with a carbon content of 6% and a water content of 6%.

[0056] The preparation method is as follows:

[0057] Step 1: Add the weighed phosphorite ore into the mixer, add the weighed anthracite, start the mixer for mixing, and spray an appropriate amount of atomized water when mixing.

[0058] Step 2: The uniformly mixed raw materials are put into the box-type sintering machine through the conveyor to ensure the smoothness of the material surface, and the thickness of the raw materials is 350mm. After the material layer is laid, the coal particles are laid out.

[0059] Step 3: use the igniter to ignite the coal particles on the surface of the fuel bed, start the exhaust fan, and open the exhaust valve after the negative pressure of the exhaust fan is stable at -8.5kpa, and the sintering starts. The temperature of the raw materials in the box-type sintering ma...

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Abstract

The invention discloses a preparation method of raw material phosphate ores for yellow phosphorus production. According to the preparation method, the powdered phosphate ores which are taken as the raw material are sintered by a box-type sintering furnace to form sintered phosphate ores, and then the sintered phosphate ores are crushed to obtain the raw material lump phosphate ores for yellow phosphorus production. According to the preparation method of the raw material phosphate ores for yellow phosphorus production, the powdered phosphate ores are agglomerated by use of the sintering method to meet the granularity need of the raw material lump phosphate ores for yellow phosphorus production, and meanwhile, after the low-grade powdered ores are sintered, the grade of the sintered ores is improved by about 2% as compared with the powdered ores, the CO2 content is reduced by 9% and the silicon-calcium ratio is increased by 0.15; in theory, the power consumption can be reduced by 2600kwh if the sintered ores are used for smelting the yellow phosphorus. Besides, the preparation method of the raw material phosphate ores for yellow phosphorus production has the advantages that a large quantity of low-grade powdered phosphate ores are well utilized, the resources are recycled, meanwhile, the sintered lump phosphate ores are used for phosphorus production, and therefore, the energy consumption is reduced, the production cost is saved, and the discharge of phosphorus slag and phosphorus sludge in the yellow phosphorus production process can be reduced and the quality of the yellow phosphorus product can be improved; the preparation method is economic and environmental friendly.

Description

technical field [0001] The invention relates to a method for preparing phosphate rock, in particular to a sintering method for preparing phosphate rock for yellow phosphorus production by using phosphate rock powder, and belongs to the technical field of phosphorus chemical industry. Background technique [0002] Yellow phosphorus is the basic raw material of phosphorus chemical industry. Its production process is relatively simple. Phosphate rock, silica and coke are put into the electric furnace according to a certain proportion and particle size, and decomposition and reduction reactions occur at a high temperature of 1300 ° C. Phosphorus steam and furnace The dust is cooled and rinsed together to obtain the product, and the high-temperature slag is directly discharged from the electric furnace. The production principle is that phosphate rock is reduced by carbon to generate elemental phosphorus at high temperature, and the product P is obtained after collection. 4 . ...

Claims

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Application Information

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IPC IPC(8): C01B25/027
Inventor 罗云邓敏孙永贵刘鹏程李军董和平王万萍
Owner YIBIN TIANYUAN GRP CO LTD