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Processing method for preparing phosphate rock powder into pellet yellow phosphorus charge

The technology of a mass yellow phosphorus furnace and a processing method is applied in the field of raw material processing and processing of a yellow phosphorus electric furnace, which can solve the problems of easy arching of the furnace, a sharp increase in furnace pressure, and an increase in power consumption, etc. The effect of stable air pressure and low consumption

Active Publication Date: 2012-10-03
瓮安烨烨磷化工实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the raw materials of phosphorus electric furnaces are all raw ore lumps. According to the characteristics of phosphate rock in my country, the lump ore that can be used to produce yellow phosphorus only accounts for one-fiftieth of the total amount of phosphorous rock, and the resources are getting less and less. , and in the project of lump ore crushing and processing, a large amount of powder ore will be produced that cannot be reused, resulting in waste of resources, and the carbonate impurities that are substituted into the lump ore into the furnace will be decomposed into carbon dioxide and carbon dioxide during the heating process With the gradual increase of temperature, the explosion of phosphate rock will increase the dust, which brings difficulties to the normal operation of the electric furnace and the refining treatment of crude phosphorus. Due to the increase of dust, the electrode current is prone to fluctuations, and the furnace is prone to arching and material collapse. Frequent, the resistance and current of the molten pool are not easy to control, and the furnace pressure increases sharply. In severe cases, it will cause fire at the electrode, burn out the electrode suspension and other facilities, and bring safety hazards to the normal operation and maintenance of the furnace surface workers.
The reduction of carbon dioxide will also increase power consumption, increase electrode consumption, increase the amount of coke and sludge phosphorus

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: With the charge cost of 1000kg, the materials are prepared as follows: 1000kg of phosphate rock powder, 100kg of humic acid, and 20kg of sodium hydroxide.

[0011] The preparation method is as follows:

[0012] Step 1: Mix humic acid and sodium hydroxide, add 4 times the weight of water, stir evenly and heat to 95°C, and make a binder for use; Step 2: Put phosphate rock powder into a twin-shaft mixer, add the above Stir the binder evenly; Step 3: Send the above-mentioned uniformly stirred materials to the ball-pressing machine through the screw conveyor to process into pellets of uniform size; Step 4: Send the processed pellets to the pelletizing disc for rolling Polishing; step 5: Send the rolled and polished pellets into the hot air furnace, and preliminarily dry them at 50°C; Step 6: send the preliminarily dried pellets into the vertical kiln at 80°C to 100°C to continue Drying; Step 7: Send the dried pellets to the rotary kiln through a belt conveyor ...

Embodiment 2

[0017] Embodiment 2: With the charge cost of 2000kg, the materials are prepared as follows: 2000kg of phosphate rock powder, 200kg of humic acid, and 40kg of sodium hydroxide.

[0018] The preparation method is as follows:

[0019] Step 1: Mix humic acid and sodium hydroxide, add 4 times the weight of water, stir evenly and heat to 100°C, and make a binder for use; Step 2: Put phosphate rock powder into a twin-shaft mixer, add the above Stir the binder evenly; Step 3: Send the above-mentioned uniformly stirred materials to the ball-pressing machine through the screw conveyor to process into pellets of uniform size; Step 4: Send the processed pellets to the pelletizing disc for rolling Polishing; Step 5: Send the rolled and polished pellets into the hot air furnace for preliminary drying at 55°C; Step 6: Send the preliminarily dried pellets into the vertical kiln at 80°C to 100°C to continue Drying; Step 7: Send the dried pellets to the rotary kiln through a belt conveyor for ...

Embodiment 3

[0024] Embodiment 3: With the charge cost of 3000kg, the materials are prepared as follows: 3000kg of phosphate rock powder, 300kg of humic acid, and 60kg of sodium hydroxide.

[0025] The preparation method is as follows:

[0026] Step 1: Mix humic acid and sodium hydroxide, add 4 times the weight of water, stir evenly and heat to 98°C, and make a binder for use; Step 2: Put phosphate rock powder into a twin-shaft mixer, add the above Stir the binder evenly; Step 3: Send the above-mentioned uniformly stirred materials to the ball-pressing machine through the screw conveyor to process into pellets of uniform size; Step 4: Send the processed pellets to the pelletizing disc for rolling Polishing; Step 5: Send the rolled and polished pellets into the hot air furnace for preliminary drying at 60°C; Step 6: Send the preliminarily dried pellets into the vertical kiln at 80°C to 100°C to continue Drying; Step 7: Send the dried pellets to the rotary kiln through a belt conveyor for c...

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Abstract

The invention provides a processing method for preparing phosphate rock powder into pellet yellow phosphorus charge. For producing 1000kg of yellow phosphorus pellet charge, 1000kg of the phosphate rock powder, 100kg of humic acid and 20kg of sodium hydroxide are adopted. The preparation method comprises the following steps of: adding the phosphate rock powder (100 meshes) into a binding agent combined by the humic acid and the sodium hydroxide, uniformly stirring, pressing into pellets by a ball press, rolling by a disc pelletizer for ejection, entering an air heating furnace for preliminary drying, entering a vertical kiln for through drying, and then further entering a rotary kiln for performing high-temperature calcination treatment at the temperature of 1100 DEG C-1200 DEG C so as to obtain a yellow phosphorus charge finished product. According to the processing method provided by the invention, the phosphate rock powder is utilized, the 100-mesh phosphate rock powder is finely ground by a ball mill and pressed into the pellet-like yellow phosphorus charge finished product via the binding agent; and compared with lump ore charge, the removal rate of harmful carbonate impurities can be up to 95%, the power consumption per ton of yellow phosphorus is reduced by 35%, the discharge of pollutants is reduced, and the production cost is lowered. The processing method is the excellent processing method for producing yellow phosphorus by utilizing the phosphate rock powder in China at present.

Description

technical field [0001] The invention relates to a raw material processing method for a yellow phosphorus electric furnace, in particular to a processing method for making phosphate rock powder into pelletized yellow phosphorus charge. Background technique [0002] At present, the raw materials of phosphorus electric furnaces are all raw ore lumps. According to the characteristics of phosphate rock in my country, the lump ore that can be used to produce yellow phosphorus only accounts for one-fiftieth of the total amount of phosphorous rock, and the resources are getting less and less. , and in the project of lump ore crushing and processing, a large amount of powder ore will be produced that cannot be reused, resulting in waste of resources, and the carbonate impurities that are substituted into the lump ore into the furnace will be decomposed into carbon dioxide and carbon dioxide during the heating process With the gradual increase of temperature, the explosion of phosphate ...

Claims

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Application Information

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IPC IPC(8): C01B25/027
Inventor 张兴华
Owner 瓮安烨烨磷化工实业有限公司
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