Brief Introduction Of Silicon Slag

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Silicon slag is a kind of metallurgical slag produced in the process of refining silicon metal outside the ladle furnace. The methods of external refining of silicon metal ladle mainly include slagging refining and gas blowing, and other refining methods such as alloy flux, electron beam, and thermal plasma are mainly used for the purification process of solar-grade silicon.

Among them, gas blowing refining is to blow industrial oxygen or compressed air into the metal silicon melt through the nozzle system at the bottom of the ladle, so that the impurities in the metal silicon are converted into corresponding oxides, and the oxide film is formed to float on the surface of the silicon melt for removal. , so that the purity of metal silicon is improved.

During the ladle refining process, about 200 kg of silicon slag will be produced for every 2t of silicon water refined, and the silicon slag usually contains more than 15% metallic silicon, which is lost in the silicon slag in the form of inclusions, which is difficult to recover, resulting in Waste of resources.

It can be seen that the physical and chemical properties of silicon slag are of great significance to the external refining of silicon metal ladle. However, there are few studies on the properties of silicon slag in the process of external refining of silicon metal ladle.

By studying the physical and chemical properties of silicon slag and metal silicon mixed in silicon slag, such as morphology, phase, and chemical composition, the author provides a basis for the enrichment and direction of impurities in the refining process of metal silicon outside the ladle furnace, and also provides a basis for blowing Provide a reference for the separation of slag and silicon in the gas refining process.

At present, in the process of industrial silicon production, there is no more research on the separation, recycling and recovery rate of silicon in silicon slag. Silicon slag has not been well utilized for a long time, and has been used to pave roads or discarded, resulting in energy consumption. and waste of resources. Moreover, facing the pressure of resource depletion and environmental protection, it is very necessary to separate and recover silicon from silicon slag and make use of it. By separating silicon from silicon slag, the cost of making the product requirements and performance meet industrial silicon standards is much lower than the production cost of industrial silicon products, so it is very necessary to separate silicon from industrial silicon slag.

Q: If I need customized packaging, is that available?
A: Yes, we can supply different specifications of bag or steel drum according to you requirement.

Q：What are the payment terms?
A：Usually T/T , or L/C.

Q : What is your lead time?
A : It usually needs about 15- 20 days after receiving the PO.

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