2202 3303 441 551 553 Silicon Metal 50-100cm For Steelmaking/Refractory/Power Metallurgy Industry

2202 3303 441 551 553 Silicon Metal 50-100cm for Steelmaking/Refractory/Power Metallurgy Industry

What is metallic silicon? Classification and application knowledge of metallic silicon

Metallic silicon, also known as crystalline silicon or industrial silicon, is primarily used as an additive for non-ferrous alloys. Silicon is a non-metallic element that appears gray with a metallic luster, and it is hard and brittle. Silicon accounts for about 26% of the Earth's crust by mass; its relative atomic mass is 28.8, density is 2.33 g/cm³, melting point is 1410°C, boiling point is 2355°C, and resistivity is 2140 Ω·m.

According to the content of iron, aluminum, and calcium in metallic silicon, it can be divided into different grades such as 553, 441, 411, 421, 3303, 3305, 2202, 2502, 1501, and 1101.

Additional products of metallic silicon include silicon micropowder, edge silicon, black silicon, and metallic silicon slag. Among them, silicon micropowder, also known as silicon powder, fine silicon powder, or silicon dust, is widely used in the refractory material and concrete industries.

In industry, metallic silicon is usually produced by the reduction of silicon dioxide with carbon in an electric furnace. The chemical reaction equation is: SiO2 + 2C → Si + 2CO. The purity of the silicon produced in this way is 97-98%, called metallic silicon. After melting and recrystallization, impurities are removed with acid to obtain metallic silicon with a purity of 99.7-99.8%. The main component of metallic silicon is silicon, so it has similar properties to silicon. Silicon has two allotropes: amorphous silicon and crystalline silicon. Amorphous silicon is a gray-black powder, which is actually a microcrystal. Crystalline silicon has a diamond crystal structure and semiconductor properties, with a melting point of 1410°C, boiling point of 2355°C, Mohs hardness of 7, and is brittle.

Amorphous silicon is chemically reactive and can burn vigorously in oxygen. It reacts with non-metals such as halogens, nitrogen, and carbon at high temperatures, and can also react with metals such as magnesium, calcium, and iron to form silicides. Amorphous silicon is almost insoluble in all inorganic and organic acids, including hydrofluoric acid, but it can dissolve in a mixture of nitric acid and hydrofluoric acid. Concentrated sodium hydroxide solution can dissolve amorphous silicon, releasing hydrogen gas. Crystalline silicon is less reactive and does not combine with oxygen even at high temperatures. It is also insoluble in any inorganic or organic acids but can dissolve in a mixture of nitric acid and hydrofluoric acid and concentrated sodium hydroxide solution.

Silicon Metal Specification

Silicon metal powder is made of Silicon lumps by crushing, seiving, washing process etc. We have different grades of Si content powder, and we have different Si powder crushing and sieving processes to adapt to different applications of silicon powder.
Normal size: 180 mesh -325 mesh, 200 mesh, 325 mesh, 800 mesh, etc.

Packing & Delivery

Packing: 1 ton big bag, 20-25mt in 20' container

 Company Profile

ZHENAN has been in the business of ferroalloy for 30 years now. It is a leading manufacturer and supplier of ferro silicon,silicon manganese,silicon metal,silicon carbide,high carbon silicon and so on.our company is a large-sized production enterprise integrating research, development, production and sales.

FAQ

Q: Are you a factory or a trading company?

We are factories and trading company.

Q: Do you have quality control?

A: Yes, we have gained BV, SGS authentication.

Q:.What is your terms of delivery?

We accept FOB, CFR, CIF, etc. You can choose the most convenient way for you. 

Q: How long is your delivery time?

A: Generally it is 7-14 days if the goods are in stock. or it is 25-45 days if the goods are not in stock, it is according to quantity.