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Fused casting zirconium chromium corundum refractory brick and preparation method thereof
The invention discloses a fused cast zirconium chromium corundum refractory brick and a preparation method thereof. The refractory brick comprises the following components in percentage by weight: 28-31% of industrial alumina powder, 25-30% of chromium sesquioxide, 0.8-2.5% of magnesium oxide, 38-45% of zircon sand and 0.5-2.5% of sodium carbonate. The production method comprises the following steps: burdening; melting the ingredients by using a melting process of introducing nitrogen from the upper part of a hollow electrode, introducing low-voltage large current and synchronously introducing nitrogen in a melting period, wherein the melting voltage is 180-360 V, the current is 3000-10000 A, and the nitrogen continuous conduction pressure is 0.3-0.8 MPa; a body clinker or magnesia integral sand mold is used for casting, the weight ratio of molding sand to water glass is (90-100): (6-10), the modulus of the water glass is 3.1-3.3, the casting temperature is 1900-2200 DEG C, and the casting speed is 180-1000 kg/min; annealing is conducted after casting, a high-quality bulk heat insulation material is used as a heat preservation medium, and the annealing speed is 0.05-0.12 DEG C/kg.h; and finally performing cold processing to prepare the refractory brick. The fused cast zirconium chromium corundum refractory brick is low in porosity, high in volume density and high in dangerous waste corrosion resistance.
本发明公开了一种熔铸锆铬刚玉耐火砖及其制备方法，所述耐火砖配方为工业氧化铝粉28～31%、三氧化二铬25～30%、氧化镁0.8～2.5%、锆英砂38～45%和碳酸钠0.5～2.5%。其生产方法为先配料；再用中空电极上部通氮气、低压大电流和熔融期同步通氮的熔化工艺熔融配料，熔化电压180～360V，电流3000～10000A，氮气持续导通压力0.3～0.8MPa；然后浇铸成型，铸型用本体熟料或镁砂整体砂型，重量比为型砂∶水玻璃＝90～100∶6～10，水玻璃模数3.1～3.3，浇铸温度1900－2200℃，浇铸速度180～1000kg/min；浇铸后退火，用优质散状隔热材料作保温介质，退火速度0.05～0.12℃/kg·h；最后冷加工制成耐火砖。本发明的熔铸锆铬刚玉耐火砖气孔率低，体积密度高，且抗危险废料侵蚀性强。
Fused casting zirconium chromium corundum refractory brick and preparation method thereof
The invention discloses a fused cast zirconium chromium corundum refractory brick and a preparation method thereof. The refractory brick comprises the following components in percentage by weight: 28-31% of industrial alumina powder, 25-30% of chromium sesquioxide, 0.8-2.5% of magnesium oxide, 38-45% of zircon sand and 0.5-2.5% of sodium carbonate. The production method comprises the following steps: burdening; melting the ingredients by using a melting process of introducing nitrogen from the upper part of a hollow electrode, introducing low-voltage large current and synchronously introducing nitrogen in a melting period, wherein the melting voltage is 180-360 V, the current is 3000-10000 A, and the nitrogen continuous conduction pressure is 0.3-0.8 MPa; a body clinker or magnesia integral sand mold is used for casting, the weight ratio of molding sand to water glass is (90-100): (6-10), the modulus of the water glass is 3.1-3.3, the casting temperature is 1900-2200 DEG C, and the casting speed is 180-1000 kg/min; annealing is conducted after casting, a high-quality bulk heat insulation material is used as a heat preservation medium, and the annealing speed is 0.05-0.12 DEG C/kg.h; and finally performing cold processing to prepare the refractory brick. The fused cast zirconium chromium corundum refractory brick is low in porosity, high in volume density and high in dangerous waste corrosion resistance.
本发明公开了一种熔铸锆铬刚玉耐火砖及其制备方法，所述耐火砖配方为工业氧化铝粉28～31%、三氧化二铬25～30%、氧化镁0.8～2.5%、锆英砂38～45%和碳酸钠0.5～2.5%。其生产方法为先配料；再用中空电极上部通氮气、低压大电流和熔融期同步通氮的熔化工艺熔融配料，熔化电压180～360V，电流3000～10000A，氮气持续导通压力0.3～0.8MPa；然后浇铸成型，铸型用本体熟料或镁砂整体砂型，重量比为型砂∶水玻璃＝90～100∶6～10，水玻璃模数3.1～3.3，浇铸温度1900－2200℃，浇铸速度180～1000kg/min；浇铸后退火，用优质散状隔热材料作保温介质，退火速度0.05～0.12℃/kg·h；最后冷加工制成耐火砖。本发明的熔铸锆铬刚玉耐火砖气孔率低，体积密度高，且抗危险废料侵蚀性强。
Fused casting zirconium chromium corundum refractory brick and preparation method thereof
熔铸锆铬刚玉耐火砖及其制备方法
MAO LIMIN (author) / WANG JUNTAO (author) / YANG HAIYUN (author) / LIU LIQIU (author) / ZENG HAIJUN (author) / XU RULIN (author) / YAN XIN (author) / WEI HAN (author) / LI QINGYUAN (author) / HU JIANHUI (author)
2022-05-17
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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