company name: gansu lixinyuan microsilica co. ltd
contact person: manager sun
telephone: 0931-8516622
phone: 18919161001
email address: microsilica@gslxy.cn
fax: 0931-8507755
website: www.gslxy.cn
address: no. 2599, yanbei road, chengguan district, lanzhou city, gansu province
the industry's name for silicon powder is rather confusing. in fact, there are currently three different products:
1. micro-silica powder: dust recovered by dust-removing environmental protection equipment when smelting metal silicon or ferrosilicon. the main component of this product is silica, which is called active silicon micro-powder and micro-silica powder.
2. silicon micropowder: quartz silicon micropowder made from natural white quartz and smelted quartz as raw materials, which are refined by primary selection, crushing, grinding, purification, dehydration and classification.
3. metallic silicon powder: metal silicon powder that has been crushed and ground by metal silicon blocks. this product should not be called silicon micropowder. it should be called metal silicon powder.
therefore, users should treat them differently when they choose!
next, we will focus on micro-silica powder: micro-silica powder - also known as silica fume - or silica ultrafine powder, which is sio2 and si gas and oxygen in the air produced when smelting ferrosilicon and industrial silicon. an ultrafine siliceous powder material formed by rapid oxidation and condensation.
physical and chemical properties of microsilica:
1. micro-silica powder: appearance is gray or gray-white powder, refractoriness >1600 ° c. volume density: 200-250 kg / m3.
2. the fineness of micro-silica powder: the fineness of silica fume is less than 1μm, accounting for more than 80%, the average particle size is 0.1-0.3μm, and the specific surface area is 20~28m2/g. its fineness and specific surface area are about cement. 80 to 100 times, 50 to 70 times the fly ash.
3, particle morphology and mineral phase structure: in the formation process of silica fume, due to the surface tension in the process of phase change, the formation of amorphous phase spherical particles, and the surface is relatively smooth, and some are multiple circles agglomerates in which the spherical particles are stuck together. it is a kind of volcanic ash material with large specific surface area and high activity. the material with micro-silica powder can play a role of lubrication.
consulting
