Refractory bricks prepared from pebbles in Changjiang River, and preparation method of refractory bricks
A technology of refractory bricks and pebbles, which is applied in the field of Yangtze River pebble refractory bricks and its preparation, can solve the problems of low refractoriness, high cost, and low strength, and achieve the effects of good high temperature resistance, good thermal shock resistance, and high strength
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[0016] A Yangtze River pebble refractory brick, made of the following materials (kg): Yangtze River pebble 20, coal slime 32, boehmite 20, magnesite tailings 18, spinel 12, silica powder 17, and vanadium iron slag 21 , Andalusite 18, Furnace Ash 20, Bauxite 30, Phyllite 15, Sulfite Pulp 10, Yellow River Silt 12.
[0017] A method for preparing Yangtze River pebble refractory bricks consists of the following steps:
[0018] (1) Mix the Yangtze River pebbles, silica powder and andalusite evenly, crush them, pass through an 80-mesh sieve, add 40% sodium carbonate and 35% sodium nitrate equivalent to the mass of the mixed powder, dry ball milling at 1000r / min for 15min, and then Calcined at 960°C for 2.5h and cooled to room temperature;
[0019] (2) Mix boehmite, magnesite tailings and spinel evenly, crush them, pass through a 100-mesh sieve, add the calcined powder in step (1), mix well, and then add 55% sulfuric acid equivalent to the mass of the mixed powder Sodium and 20% sodium ch...
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