Brown Fused Alumina BFA F20-F220 Blasting media
【產(chǎn)品名稱】：棕剛玉，棕色氧化鋁砂，棕色金剛砂【英文名稱】：Brown fused alumina, BFA, Brown corundum, Brown aluminun oxide, Electrocorundum 14A
【CAS】：1344-28-1
棕剛玉磨料是兼顧研磨效率和成本的研磨材料，它有鋁礬土經(jīng)過高溫冶煉生產(chǎn)而來。然后破碎，磁選去鐵，篩分成多種粒度。棕剛玉質(zhì)地致密、硬度高、韌性好、耐火溫度高。
棕剛玉的種類繁多。按照氧化鋁含量不同，分為一級棕剛玉、二級棕剛玉、三級棕剛玉。按照冶煉方式的不同，分為固定爐棕剛玉和傾倒爐棕剛玉，其中傾倒爐棕剛玉的純度更高。按照破碎工藝和顆粒形狀的不同，分為棕剛玉對輥砂和棕剛玉馬克砂，其中馬克砂棕剛玉的堆積密度更高。按照粒度分布的不同，可分為棕剛玉F砂和棕剛玉P砂，其中F砂適合生產(chǎn)固結磨具和噴砂，P砂適合生產(chǎn)涂附磨具。
Brown Fused Alumina BFA Blasting media is a grinding material that balances grinding efficiency and cost. It is produced by high-temperature smelting of bauxite. Then it is crushed, magnetic separated to remove iron, and sieved into various particle sizes. Brown corundum has a dense texture, high hardness, good toughness, and high refractory temperature.
There are many types of brown corundum. According to the different contents of alumina, it is divided into primary brown corundum, secondary brown corundum, and tertiary brown corundum. According to the different smelting methods, it is divided into fixed furnace brown corundum and dump furnace brown corundum, among which the purity of dump furnace brown corundum is higher. According to the different crushing processes and particle shapes, it is divided into brown corundum roller sand and brown corundum mark sand, among which mark sand and brown corundum have a higher bulk density. According to the different particle size distributions, it can be divided into brown corundum F sand and brown corundum P sand. Among them, F sand is suitable for producing bonded grinding tools and sandblasting, while P sand is suitable for producing coated grinding tools.
Brown Fused Alumina BFA F20-F220 Blasting media的特點：
1. 硬度高，磨削力強，比天然金剛砂的磨削性能優(yōu)越。2. 韌性高，抗彎折能力強。棕剛玉的韌性比白剛玉略高一些，自銳性比白剛玉略低一些。
3. 經(jīng)過磁選后的棕剛玉Fe2O3含量和磁性物含量都很低。
4. 棕剛玉的耐火性能好，在研磨過程產(chǎn)生的高溫狀態(tài)下，磨削性能依然很好。
5. 一級棕剛玉耐用度高，可循環(huán)使用。噴砂過程不粉化、碎屑少。
6. 棕剛玉粒度齊全，市場規(guī)模大，用戶可以根據(jù)實際要求隨意選擇粒度。
對于質(zhì)量要求高的用途，例如特殊噴砂和磨具產(chǎn)品，傾倒爐巴馬克棕剛玉更具優(yōu)勢：
1.化學成分。傾倒爐棕剛玉氧化鋁含量不低于95%，硅含量低于0.1%，低硅高鈦的傾倒爐棕剛玉更適合生產(chǎn)陶瓷砂輪和制品。2.巴馬克破碎工藝生產(chǎn)的棕剛玉粒型圓潤，堆積密度大于顎式破碎機的堆積密度。
3.傾倒爐棕剛玉晶體集合體占比高，晶體尺寸比固定爐小，抗破碎能力強，韌性好，使用于磨具制品。
4.傾倒爐棕剛玉用于噴砂研磨，耐用度比固定爐更高。
Brown Fused Alumina BFA F20-F220 Blasting media化學成分：
| 類型粒度 | Al2O3 | SiO2 | Fe2O3 | TiO2 | |
| 固定爐 | F16 | 95-96 | ≤1.2 | ≤3.0 | 1.5-3.8 |
| F20 | 95-96 | ≤1.2 | ≤0.3 | 1.5-3.8 | |
| F24 | 95-96 | ≤1.2 | ≤0.3 | 1.5-3.8 | |
| F36 | 95-96 | ≤1.2 | ≤0.3 | 1.5-3.8 | |
| F60 | 94-95.5 | ≤1.2 | ≤0.3 | 1.5-3.8 | |
| F80 | 94-95.5 | ≤1.2 | ≤0.3 | 1.5-3.8 | |
| F220 | 93-95 | ≤1.4 | ≤3.0 | 1.5-4 | |
| 傾倒爐 | F16 | 95.5-97 | ≤1 | ≤0.25 | 1.7-3.4 |
| F20 | 95.5-97 | ≤1 | ≤0.25 | 1.7-3.4 | |
| F24 | 95.5-97 | ≤1 | ≤0.25 | 1.7-3.4 | |
| F36 | 95.5-97 | ≤1 | ≤0.25 | 1.7-3.4 | |
| F60 | 95-96.5 | ≤1 | ≤0.25 | 1.7-3.4 | |
| F80 | 95-96.5 | ≤1 | ≤0.25 | 1.7-3.4 | |
| F220 | 95-96 | ≤1 | ≤0.25 | 1.7-3.6 | |
Brown Fused Alumina BFA F20-F220 Blasting media物理性能：
| 主要礦物 | Al2O3 |
| CAS編號 | 1344-28-1 |
| 英文名稱 | Brown Fused Alumina |
| 莫氏硬度 | 9.0 |
| 顯微硬度 | 2000-2200kg/mm2 |
| 熔點 | 2200 ℃ |
| 使用溫度 | 1850℃ |
| 比重 | 3.95g/cm3 |
| 堆積密度(LPD): | 1.53-1.99 g/cm3 |
| 顏色 | 棕色 |
| 晶形 | 三方晶系 |
棕剛玉的堆積密度和磁性物含量：
| 類型粒度 | 堆積密度（g/cm3） | 磁性物含量（%） | |
| 固定爐 | F16 | 1.89-2.0 | ≤0.044 |
| F20 | 1.87-1.99 | ≤0.042 | |
| F24 | 1.86-1.96 | ≤0.038 | |
| F36 | 1.82-1.95 | ≤0.034 | |
| F60 | 1.75-1.86 | ≤0.026 | |
| F80 | 1.72-1.82 | ≤0.024 | |
| F220 | 1.55-1.65 | ≤0.018 | |
| 傾倒爐 | F16 | 1.91-2.03 | ≤0.044 |
| F20 | 1.90-2.02 | ≤0.042 | |
| F24 | 1.86-1.98 | ≤0.038 | |
| F36 | 1.85-1.96 | ≤0.034 | |
| F60 | 1.78-1.86 | ≤0.026 | |
| F80 | 1.74-1.85 | ≤0.024 | |
| F220 | 1.52-1.63 | ≤0.018 | |
Brown Fused Alumina BFA F20-F220 Blasting media用途：
Sandblasting surface treatment of metals such as carbon steel, cast iron, die cast aluminum, and mold steel.Glass sandblasting and atomization.
Ceramic grinding wheel, heavy-duty grinding wheel, grinding wheel.
Resin grinding wheel, ultra-thin cutting disc, corner grinding disc, etc.
Grinding blocks, sponge grinding blocks, etc.
Ceramic components such as ceramic aerators for environmental protection equipment.
Wear resistant flooring and floor mortar aggregates.
碳鋼、鑄鐵、壓鑄鋁、模具鋼等金屬的噴砂表面處理。玻璃噴砂霧化。
陶瓷砂輪，重負荷砂輪，磨輪。
樹脂砂輪，超薄切割片，角磨片等。
拋磨塊，海綿磨塊等。
陶瓷元器件例如環(huán)保設備的陶瓷曝氣器等。
耐磨地坪、地坪砂漿骨料。
Brown Fused Alumina BFA F20-F220 Blasting media的生產(chǎn)流程：
一級棕剛玉F80金剛砂的包裝：
