エメリー 化学特性,用途語,生産方法
解説
エメリー，金剛砂ともいう．コランダムと磁鉄鉱とがきわめて均一に分散している砂状の鉱物．石英，赤鉄鉱，ダイヤスポアなどをわずかに含み，研磨材として用いられる．ボーキサイトを焼成し，天然品と類似の鉱物組成にした人造エメリーもある．人造コランダムのように鋭利な角をもたないため，研磨の際に深いきずを残さない利点があり，研磨布紙(エメリーペーパー)，バフ研磨用に用いられている．
分布
金剛砂とも。コランダムとスピネルを主とし，不純物として石英，磁鉄鉱，ザクロ石などを含む黒色砂状の鉱石。研磨材，すべり止めなどに利用。アルミナ質の岩石が変成したものやアルミナの多い火成岩中にあり，それらをもとにした砂鉱床もある。米国，ギリシア，ロシアなどに多く，日本では大分県の新木浦鉱山で産出。
使用
As a loose abrasive grains. Through pressure blasting, emery (relatively coarse grain size) could used to cleans tone and concrete, clean metal castings, prepare surfaces for painting, and etch glass and plastics . It is mainly used for sawing stone, rough grinding plate glass, and surfacing stone. Emery (fine-grained powders) could charge brass tube which drilling small holes in glass, porcelain, gemstones,ect. Emery cou cast into the treads of steps and ramps to increase traction.
As a bonded abrasives. Emery are bonded and pressed or molded into a wide variety of bonded abrasives such as grind ing wheels, honing stones, and tumbling media.
Most of the emery is used as hardener for heavy-duty concrete floors and as nonskid material on bridges and at tollbooths.
定義
emery: A rock composed of corundum(natural aluminium oxide,Al
2O
3) with magnetite, haematite, orspinel. It occurs on the island ofNaxos (Greece) and in Turkey. Emeryis used as an abrasive and polishingmaterial and in the manufacture ofcertain concrete floors.
一般的な説明
Odorless, white, crystalline powder. Natural aluminum oxide. Very high melting and hard. Used for polishing, grinding, and abrasive operations. An inhalation hazard when present as a dust.
反応プロフィール
EMERY has only only low chemical reactivity. May react as a base with very strong acids
农业用途
Emery or corundum is a naturally occurring alumina (natural aluminum oxide, Al
20
3)used as an abrasive and polishing material, and in the manufacture of some concrete floors.
エメリー 上流と下流の製品情報
原材料
準備製品