Cold-pressed pellet used for smelting ferrosilicon and preparation method thereof
A technology of cold-pressed pellets and ferrosilicon, applied in the direction of improving process efficiency, etc., can solve problems such as complex process flow, high processing cost, and large project investment, and achieve the effects of simple process flow, cost reduction, and low project investment
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Examples
Embodiment 1
[0019] Example 1, 6 parts of coal powder with particle size no more than 4mm, and 11 parts of SiO 2 The content is more than 90% smelting ferrosilicon dust and 52 parts of SiO 2 Silica powder with a content of more than 97% and a particle size of no more than 4mm is weighed and proportioned. The above three raw materials are mixed with water and 6 parts of a binder and sent to the mixer for mixing. The binder is 2.5 parts of bentonite and 3.5 parts of waste paper. The slurry is mixed. After adding water, the overall moisture content of all materials is 9 parts. In order to ensure continuous operation, two mixing mills are used alternately. The mixing time is 6 minutes to form a mixture. The fully mixed mixture is passed through LD630 The chain bucket machine is sent to the GYQ800 high-pressure compressor for cold pressing to form wet pellets. The pressure between the rollers is 8t / cm, and the linear speed on the surface of the pressing roller is 0.38m / s. The rollers are four ...
Embodiment 2
[0021] Example 2, 11 parts of coal powder with particle size no more than 4mm, and 21 parts of SiO 2 The content is more than 90% smelting ferrosilicon dust and 66 parts of SiO 2 Silica powder with a content of more than 97% and a particle size of no more than 4mm is weighed and proportioned. The above three raw materials are mixed with water and 10 parts of binder and sent to the mixer for mixing. The binder is water glass with a mass concentration of 8%. After adding water, the overall moisture quality of all materials is 11 parts. In order to ensure continuous operation, two mixers are used alternately. The mixing time is 6 minutes to form a mixture. The fully mixed mixture is sent to the LD630 chain bucket machine Enter the GYQ800 high-pressure compressor for cold pressing to form wet pellets. The pressure between the rollers is 11t / cm. The wet pellets are put into a drying kiln at 190°C for drying. The drying time is 2 hours. The pelleting strength of the composite green...
Embodiment 3
[0023] Example 3, 16 parts of coal powder with particle size no more than 4mm, and 32 parts of SiO 2 The content is more than 90% smelting ferrosilicon dust and 83 parts of SiO 2 Silica powder with a content of more than 97% and a particle size of no more than 4mm is weighed and proportioned. The above three raw materials are mixed with water and 13 parts of a binder, and then sent to a mixer for mixing. The binder is water with a mass concentration of 10%. Glass, after adding water, the overall moisture quality of all materials is 13 parts. In order to ensure continuous operation, two mixers are used alternately. The mixing time is 6 minutes to form a mixture. The fully mixed mixture is passed through the LD630 chain bucket machine Send it to GYQ800 high-pressure compressor for cold pressing to form wet pellets. The pressure between the rollers is 14t / cm. Put the wet pellets into a 200°C drying kiln for drying. The drying time is 2 hours. The pelleting strength of the compos...
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Abstract
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