Anti-skinning unshaped refractory material made of magnesium aluminate spinel used for cement kiln and preparation method and application of anti-skinning unshaped refractory material

Abstract

The invention discloses an anti-skinning unshaped refractory material made of magnesium aluminate spinel used for a cement kiln and a preparation method and application of the anti-skinning unshaped refractory material. The anti-skinning unshaped refractory material comprises raw materials as follows: quaternary mixed magnesium aluminate spinel with the particle diameter below 5mm, secondary mixed cordierite with the particle diameter below 3mm, superfine magnesia powder with the particle diameter smaller than 0.02mm, alpha-alumina micropowder with the particle diameter smaller than 0.02mm, silicon micropowder, silicon nitride powder, a high-efficiency water-reducing agent and water. According to the anti-skinning unshaped refractory material disclosed by the invention, with the magnesium aluminate spinel as the main crystalline phase and a superfine magnesia powder-silicon micropowder-silicon nitride powder-water system to substitute a pure calcium aluminate cement bonding agent, a complex-phase structure with the magnesium aluminate spinel as the main crystalline phase and the cordierite as the secondary crystalline phase is formed under high temperature, so that the refractory material has certain high-temperature resistance and good anti-skinning and anti-heat shock performances, can be used as the anti-skinning unshaped refractory material for a novel dry-process cement rotary kiln and a cement presintering production process, and has broad application prospect.

Description

technical field [0001] The invention belongs to the refractory material for cement kiln in the field of building materials, in particular to a refractory material with certain high temperature resistance and excellent anti-skinning and thermal shock resistance, which can be used as a cement dry-process rotary kiln and an energy-saving cement short process Magnesia-alumina spinel anti-skinning amorphous refractory material for pre-fired kiln, its preparation method and application. Background technique [0002] With the advancement of cement technology, the new dry process cement rotary kiln has been widely used at home and abroad. In accordance with environmental protection regulations and national policies on energy conservation and emission reduction, cement manufacturers are increasingly using solid waste such as construction waste, domestic waste, sewage sludge, and industrial waste residue as raw materials and fuels for producing cement clinker. Therefore, the content ...

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Problems solved by technology

However, the anti-skinning performance of these two anti-skinning castables at 1200°C is not good, because both of these two anti-skinning castables need to use silica fume and pure calcium aluminate cement as binders

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