Electric smelting magenisum aluminum spinel brick for coal water slurry gasifying furnace and preparation method thereof
A technology of aluminum spinel and gasifier, which is applied in the field of fused magnesia-aluminum spinel bricks and its preparation for coal-water slurry gasifiers, and can solve threats to human and animal health, environmental pollution, and damage to brick linings, etc. problems, to achieve the effect of excellent anti-coal slag penetration performance, high bulk density, and strong anti-stripping ability
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Embodiment 1
[0014] An electric fused magnesia-aluminum spinel brick used in a coal-water slurry gasifier and a preparation method thereof. First, 58~61wt% industrial alumina powder and 39~42wt% light-burned magnesia powder are used as raw materials, and 0.5~1.5wt% coke of the raw materials is added, and stirred evenly; put into the electric arc furnace, use 100~120V Voltage electric melting until the raw materials are completely melted, and then continue to smelt for 30~40 minutes, pour the smelted high-temperature synthetic material into the mold; then place it in the tunnel kiln and anneal with the mold at 1350~1380℃, the annealing cycle is 72~ After 78 hours, leave the kiln at 30-40°C and demould; finally, the demoulded product is machined to obtain fused magnesia-aluminum spinel bricks for coal-water slurry gasifiers.
[0015] The bulk density of the fused magnesia-aluminum spinel brick used in the coal-water slurry gasifier prepared in Example 1 is 3.08~3.11g / cm 3 , the apparent por...
Embodiment 2
[0017] An electric fused magnesia-aluminum spinel brick used in a coal-water slurry gasifier and a preparation method thereof. First, 61~64wt% industrial alumina powder and 36~39wt% light-burned magnesia powder are used as raw materials, and 1.5~2.5wt% coke is added to the raw materials, and stirred evenly; put into the electric arc furnace, use 120~140V Voltage electric melting until the raw materials are completely melted, and then continue to smelt for 40~50 minutes, pour the smelted high-temperature synthetic material into the mold; then place it in a tunnel kiln and anneal with the mold at 1380~1410℃, the annealing cycle is 78~ After 84 hours, leave the kiln at 40-50°C and demould; finally, the demoulded product is machined to obtain fused magnesia-aluminum spinel bricks for coal-water slurry gasifiers.
[0018] The bulk density of the fused magnesia-aluminum spinel brick used in the coal-water slurry gasifier prepared in Example 2 is 3.10~3.13g / cm 3 , the apparent poros...
Embodiment 3
[0020] An electric fused magnesia-aluminum spinel brick used in a coal-water slurry gasifier and a preparation method thereof. First use 64~67wt% industrial alumina powder and 33~36wt% lightly burned magnesia powder as raw materials, add 2.0~3.0wt% coke of the raw materials, stir evenly; put it into the electric arc furnace, use 140~160V Voltage electric melting until the raw materials are completely melted, and then continue to smelt for 50~60 minutes, pour the smelted high-temperature synthetic material into the mold; then place it in the tunnel kiln and anneal with the mold at 1410~1440℃, the annealing cycle is 84~ After 90 hours, leave the kiln at 50-60°C and demould; finally, the demolded product is machined to obtain fused magnesia-aluminum spinel bricks for coal-water slurry gasifiers.
[0021] The bulk density of the fused magnesia-aluminum spinel brick used in the coal-water slurry gasifier prepared in Example 3 is 3.11~3.14g / cm 3 , the apparent porosity is 2.27~2.67...
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