High-thermal-shock-resistance calcium oxide pellet and preparation method thereof
A technology of calcium oxide pellets and thermal shock, which is applied in the direction of solid waste removal, etc., can solve the problems of poor thermal shock resistance of calcium oxide pellets, easy bursting and pulverization, etc., and achieves easy mass production, mature equipment, and mature technology Effect
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[0025] Example 1
[0026] The technical solution of the present invention: a calcium oxide pellet with high thermal shock resistance and a preparation method thereof, including the following steps:
[0027] (1)Ca(OH) 2 Calcium carbide slag powder with a purity greater than 90.0% is ball milled to a particle size of 60.0-150.0μm, and the mass ratio of the three particle sizes (60-90μm: 90-120μm: 120-150μm) is 4.0:2.0:4.0. The thermal shock resistance of calcium oxide pellets decreases as the particle size of calcium carbide slag powder increases.
[0028] (2) Add 5.0% H to the calcium carbide slag powder pretreated in step (1) 2 O is used as a binder and mixed uniformly. The thermal shock resistance of calcium oxide pellets increases with the increase of water addition.
[0029] (3) The mixed and dried calcium carbide slag powder in the step (2) is at 100.0kgf / cm 2 Press molding under the molding pressure and hold for 0.5min, and dry for 10.0h. When the pressure is 100.0kgf / cm 2 , The...
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[0032] Example 2
[0033] The technical solution of the present invention: a calcium oxide pellet with high thermal shock resistance and a preparation method thereof, including the following steps:
[0034] (1)Ca(OH) 2 The calcium carbide slag powder with a purity greater than 92.4% is ball milled to a particle size of 60.0-150.0μm, and the mass ratio of the three particle sizes (60-90μm: 90-120μm: 120-150μm) is 4.0:4.0:2.0 respectively. The thermal shock resistance of calcium oxide pellets decreases as the particle size of calcium carbide slag powder increases.
[0035] (2) Add 10.0% H to the calcium carbide slag powder pretreated in step (1) 2 O is used as a binder and mixed uniformly. The thermal shock resistance of calcium oxide pellets increases with the increase of water addition.
[0036] (3) The mixed and dried calcium carbide slag powder in the step (2) is at 250.0kgf / cm 2 Press molding under the molding pressure and hold the pressure for 2.5min, and dry for 20.0h. When the ...
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[0039] Example 3
[0040] The technical solution of the present invention: a calcium oxide pellet with high thermal shock resistance and a preparation method thereof, including the following steps:
[0041] (1)Ca(OH) 2 The calcium carbide slag powder with a purity greater than 94.0% is ball milled to a particle size of 60.0-150.0μm, and the mass ratio of the three particle sizes (60-90μm: 90-120μm: 120-150μm) is 6.0:2.0:2.0 respectively. The thermal shock resistance of calcium oxide pellets decreases as the particle size of calcium carbide slag powder increases.
[0042] (2) Add 15.0% H to the calcium carbide slag powder pretreated in step (1) 2 O is used as a binder and mixed uniformly. The thermal shock resistance of calcium oxide pellets increases with the increase of water addition.
[0043] (3) The mixed and dried calcium carbide slag powder in the step (2) is heated to 350.0kgf / cm 2 Press molding under the molding pressure and hold the pressure for 3.0min, and dry for 24.0h. Wh...
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