クロムれんが
Chrome bricks are neutral bricks, mainly used as an isolation layer for acidic and alkaline refractories at high temperatures, and also used as the lining of non-ferrous smelting furnaces.
でも, it should not be used in direct contact with the iron and the atmosphere changes frequently.
Chrome brick in the glass melting kiln began to be used. But only limited to dark bottles and jars glass kiln or alkali-free glass fiber kiln.
And mainly used in the high-temperature parts of the glass kiln. Such as the upper pool wall, small furnace mouth, flowing liquid hole, charging mouth, and other places, because it can significantly extend the kiln age.
PER company produces high-quality refractory bricks including refractory clay bricks, 高アルミナ耐火れんが, 耐火珪石れんが, マグネシア耐火レンガ, ムライトレンガ, 断熱レンガ, 等.
その間, if you are interested in our refractory brick products, または炉や窯の建設を計画している場合, 私たちに連絡できます! 専門的なアドバイスと競争力のある価格で迅速に対応いたします!
More Chrome Bricks Types
Aluminum-Chromium Bricks
AlCr brick is a high alumina brick with Al2O3 as the main component and a small amount of Cr2O3.
The sintered brick made of AlCr slag is also AlCr brick, also called AlCr slag brick. Aluminum-chromium brick than high alumina brick erosion resistance, aluminum-chromium slag brick, and high-temperature mechanical properties of good characteristics.
AlCr brick has many advantages such as high density, 低い気孔率, high bond strength, high hardness, high load softness, 良好な耐摩耗性, anti-scouring, 優れた耐熱衝撃性, strong resistance to metal melt and slag corrosion, long life, 等.
Which is widely used in various smelting equipment and other ultra-high temperature kilns.
Magnesium Chrome Brick
Ordinary magnesia-chromium brick is made of sintered magnesia sand and chromite as raw materials, in appropriate proportion, by forming and high-temperature firing.
The mineral composition of the product is magnesite, spinel, and a small amount of silicate.
Ordinary magnesia-chromium brick has good resistance to alkaline slag, better resistance to acid slag than magnesia brick, better resistance to thermal shock than magnesia brick, higher load softening temperature, and good volume stability at high temperature, small shrinkage of the refired line at 1500℃.
Magnesium aluminum brick has good slag resistance, high-temperature performance, and thermal stability, the price is cheaper than magnesium spinel brick.
They are widely used in the roof of steelmaking flat furnaces and are still used in steel ladles, steelmaking furnace linings, glass kiln heat storage chambers, mixed iron furnaces, copper reflex kiln roofs, and refractory industry high-temperature kilns.
Types and Characteristics of Magnesium-Chromium Bricks
現在, there are several types of magnesium chrome brick produced through different methods, including common brick, direct bonding brick, common sintered brick, re-bonding brick, and fusion casting brick.
1. Common Magnesia Chrome Brick
This is the traditional product, with chrome ore as coarse particles and magnesium sand as a fine powder. Or two materials using graded particle composition, the firing temperature is generally 1550 〜 1600 ℃. The microstructure of this brick shows little direct combination between chromite particles and magnesite, mostly silicate (CMS) cementation or fissure isolation. Fang magnesite in the desolvation phase less, the matrix is rarely directly combined, the mechanical properties of this brick are poor, poor resistance to slag corrosion.
2. Directly Combined Magnesia-Chromium Brick
Directly combined with magnesium-chromium brick is developed based on ordinary magnesium-chromium brick. Its production characteristics are mainly two points, one is the use of more pure raw materials, and the second is the use of higher firing temperature. The so-called direct bonding means that there is more direct contact between chromite particles and magnesite in the brick. Because there is less Si02 in the raw material (controlled below 1% に 2%), less silicate is generated. Then the silicate is extruded into the corner of the solid phase particles using high-temperature firing, thus improving the direct bonding of the solid phase.
Direct bonding magnesium-chromium brick due to the high degree of direct bonding, so that the brick has a high-temperature strength, slag resistance, 耐浸食性, 耐磨耗性, 耐食性, and excellent thermal shock stability and volume stability at 1800 ℃.
3. Common Sintered Magnesium-Chromium Brick
This product production process is characterized by a certain ratio of magnesium sand and chromite fine powder mixture of high-temperature combustion. To achieve the generation of secondary spinel and magnesia-chromite direct bonding for solid-phase reaction, the production of common sintering material. This material is used to manufacture sintered products or chemically bonded products.
Co-sintered magnesia-chromium bricks have better direct bonding and microstructural homogeneity than directly bonded bricks, with more magnesite desolvation phase and intergranular secondary spinel, co-sintered magnesia-chromium bricks have a series of better properties than directly bonded bricks, especially known for high-temperature strength, resistance to rapid temperature change and slag resistance.
4. Combined Magnesium-Chromium Brick
Electric fusion method to make magnesium-chromium mixed powder melt, through the melt precipitation crystal, the formation of a fairly uniform microstructure, magnesium-chromium spinel, and magnesite mixed crystal as the main phase composition of the raw material, the electric fusion magnesium-chromium material crushed into certain particle size, mixed molding, by firing to prepare the combined brick, or directly used to do chemically bonded brick.
PER耐火物会社について
PER Refractories Company は新密市にあります, 河南省, 中国の耐火物の故郷. 当社はRを融合した技術立耐火企業です。&D, 製造, 販売, および技術サービス. この地域の豊富な資源と優れた品質は、比類のない優れた条件を提供します。 耐火物の製造. 当社の主力製品は耐火粘土レンガです, 高アルミナ耐火れんが, 耐火珪石れんが, マグネシウム耐火レンガ, ムライトレンガ, 断熱レンガ, その他 高温耐性製品.
会社PER耐火物はグリーンの生産拠点です, 省エネ, 環境に優しい新耐火物. 当社はISO9001を取得しました:2008 国際品質システム認証および GB/T24001-2004 / ISO14001:2004 環境マネジメントシステム認証, 企業品質検査機関認証. 当社の製品は以下の地域でよく販売されています 20 世界中の国. 冶金用に好ましい耐火物製品です。, 非鉄, 石油化学, ガラス, セラミックス, およびその他の耐火物産業.
