Metallurgical slag sintered bricks and preparation method thereof
A technology of metallurgical slag and sintered bricks, which is applied in the fields of environmental protection and resource utilization, can solve problems such as the utilization of metallurgical slag that cannot be scaled up, high requirements on raw material composition and physical properties, and restrictions on the application of metallurgical slag, so as to reduce the production capacity. consumption, good green strength, and comprehensive utilization
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no. 1 example
[0030] This embodiment provides a method for preparing a metallurgical slag sintered brick, the method comprising:
[0031] The sieve residue of the 1mm sieve of the crushing and ball milling process discharged in parts by weight is less than 1%, the quality of CaO accounts for 15% of the total mass of metallurgical slag, and Fe 2 o 3 The mass of the metallurgical slag accounts for 40% of the total mass of the metallurgical slag, 5 parts of iron-selected tailings, 95 parts of clay in parts by weight, and mixes evenly. After the mixed mixture is aged, it is formed into bricks by pressing, and the bricks are dried Finally, enter the kiln and fire at a temperature of 1100°C to obtain sintered bricks.
[0032]This embodiment also provides a sintered brick prepared by the above method. The sintered brick is red in color, has a water absorption rate of 5.1%, and a compressive strength of 125 MPa.
no. 2 example
[0034] This embodiment provides a method for preparing a metallurgical slag sintered brick, the method comprising:
[0035] The crushing in parts by weight, the sieve residue of the 1mm sieve discharged by the ball milling process is less than 1%, the quality of CaO accounts for 50% of the total mass of metallurgical slag, and Fe 2 o 3 The mass percentage of the total mass of the metallurgical slag is 20 parts of red mud, 80 parts of shale in parts by weight, and 2 parts of flux in parts by weight, mixed uniformly, and after the mixed mixture is stale, The adobe is extruded into adobe, dried, put into a kiln, and fired at a temperature of 1000°C to obtain a sintered brick.
[0036] This embodiment also provides a sintered brick prepared by the above method. The sintered brick is red in color, has a water absorption rate of 4.7%, and a compressive strength of 285 MPa.
no. 3 example
[0038] This embodiment provides a method for preparing a metallurgical slag sintered brick, the method comprising:
[0039] The crushing in parts by weight, the sieve residue of the 1mm sieve discharged by the ball milling process is less than 1%, the quality of CaO accounts for 30% of the total mass of metallurgical slag, and Fe 2 o 3 The mass of the metallurgical slag accounts for 30 parts of steel slag tailings of 25%, 70 parts of clay and shale mixture in parts by weight, and 1.5 parts of flux in parts by weight. They are mixed evenly, and the mixed After the mixture is stale, it is extruded into adobe. After drying, the adobe is put into a kiln and fired at a temperature of 1070°C to obtain a sintered brick.
[0040] This embodiment also provides a sintered brick prepared by the above method, the color of the sintered brick is brown, the water absorption is 6.4%, and the compressive strength is 202 MPa.
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