尖晶石是一種鎂鋁氧化物，其主要成分為氧化鋁和氧化鎂。

元豐尖晶石可分為很多種，如鋁尖晶石、鐵尖晶石、鋅尖晶石、錳尖晶石、鉻尖晶石等。

元豐鋁鎂尖晶石采用燒結(jié)法和電熔法兩種生產(chǎn)工藝，原料主要是菱鎂礦和工業(yè)氧化鋁粉或鋁礬土。

1、按生產(chǎn)工藝或方法分：燒結(jié)鋁鎂尖晶石（燒結(jié)尖晶石）和電熔鋁鎂尖晶石（電熔尖晶石）。

2、按生產(chǎn)原料可以劃分：鋁礬土基鋁鎂尖晶石與氧化鋁基鋁鎂尖晶石（燒結(jié)或電熔）。

3、按含量和性能劃分為：富鎂尖晶石、富鋁尖晶石以及活性尖晶石。

4、按氧化鎂和氧化鋁的指標(biāo)不同，分富鎂尖晶石和富鋁尖晶石并應(yīng)用不同領(lǐng)域。

元豐燒結(jié)鋁鎂尖晶石具有比較好的抗侵蝕、抗腐蝕、抗剝落、抗渣性、抗磨蝕能力，比較耐高溫等特點(diǎn)。

元豐電熔鎂鋁尖晶石是用工業(yè)氧化鋁和輕燒鎂并配入適量的菱鎂礦做配合料，在電弧爐內(nèi)經(jīng)高溫熔制合成的耐火原料。

燒結(jié)鋁鎂尖晶石用于水泥回轉(zhuǎn)窯，用于制作鋼包澆注料，提高鋼板襯的抗侵蝕能力，也可用于煉鋼用耐火材料。

元豐電熔鋁鎂尖晶石是制造滑板、水口磚、平爐爐磚的常用材料。

Introduction of spinel

Spinel spinel is gens mineral, gem grade are mainly refers to the magnesium aluminate spinel, chemical formula of MgAl2O4, is a kind of magnesium aluminum oxide, the main components in aluminum oxide and magnesium oxide, belongs to the cubic system, crystal morphology of octahedral and octahedral and dodecahedron diamond shape, vitreous luster, transparency, refractive index of , homogenate, hardness of 8, g/cm3 density, conchoidal fracture. Pink and red spinel red fluorescence distributed in long and short wave ultraviolet light. Magnesium aluminate spinel is widely used in refractory material, steel smelting, cement rotary kiln and glass kiln.

Spinel is composed of magnesium aluminum oxide mineral, because of containing magnesium, iron, zinc, manganese and so on elements, they can be divided into a lot of kinds, such as aluminum spinel, hercynite spinel, zinc, manganese spinel, chrome spinel etc. Because contain different elements and different spinel can have different colors, such as magnesium spinel in red, blue, green, brown, or between the colorless; Zinc spinel is green; Spinel is black, and so on. Spinel is hard vitreous octahedron or particle and block. Spinel available heat treatment to improve the color. In the 900 ℃ heating into green blue, heated to 1200 ℃ to yellow. This kind of changing color effect is stable. Will also have red spinel heat remove brown to obtain pure red.

The classification of magnesium aluminum spinel

Alumina magnesia and fused spinel with sintering, the method of two kinds of production process. Raw materials mainly magnesite and industrial alumina powder or bauxite. According to the index of magnesium oxide and alumina, magnesium rich spinel and rich aluminum spinel and applied to different fields.

1, according to the production process or method points: sintered alumina magnesia spinel (sintered spinel) and fused alumina magnesia spinel, fused spinel).

2, according to the production of raw materials can be divided into: bauxite alumina magnesia spinel with alumina aluminum magnesium spinel (sintered or fused).

3, according to the content and performance are divided into: magnesium rich spinel, rich spinel aluminum spinel and activity.

Spinel characteristics

Sintered alumina magnesia spinel has good erosion resistance, corrosion resistance, spalling resistance capability is strong, good slag resistance, strong abrasion resistance, good thermal stability, high temperature resistant characteristics. Fused spinel has the secret of high temperature resistant, body, bibulous rate is low, small thermal expansion coefficient, good thermal stability, strong ability to resist erosion characteristics.

Fused magnesium aluminate spinel with a purity of % or more industrial alumina and a purity of 96% or more light burning magnesium and distribution into the right amount of high purity magnesite (MgO style > 47%) mixtures, Canon of high temperature melt in arc furnace synthetic refractory raw material, the grain growth is good, dense texture, uniform structure, is made of high strength, good thermal shock stability spinel (periclase advanced refractory products of a kind of high-grade raw materials).

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