Cement clinker and preparation method thereof
A technology for cement clinker and raw materials, applied in the direction of cement production, etc., can solve the problems affecting the economic benefits of extracting alumina from fly ash, cannot be applied, and secondary environmental pollution, and achieves saving energy consumption and reducing energy consumption. , The effect of fine grinding and low cost
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[0033] Example 1
[0034] figure 1 The process flow chart of the method for preparing cement clinker provided in the first embodiment of the present invention.
[0035] The main component of the residue obtained after the alumina is extracted by the fly ash soda lime sintering method is the calcium silicate, and the above-mentioned residue is processed by the desalination process to obtain the fly ash aluminum extraction residue. The steps of the dealkalization process are as follows: (1) The aluminum extraction residue is stirred with water to prepare an aluminum extraction residue slurry; (2) while stirring, calcium carbide slag is slowly added to the aluminum extraction residue slurry to carry out the dealkalization reaction; (3) ) Filtering and washing the aluminum extraction residue slurry after the dealkalization reaction. The alkali content of fly ash aluminum residue is below 0.6%, and its main chemical components are CaO and SiO 2 , The main phase of fly ash aluminum res...
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[0046] Example 2
[0047] The difference from the embodiment is that the raw materials (raw meal) used in this embodiment include: 80 parts by weight of fly ash aluminum residue, 18 parts by weight of limestone, 2 parts by weight of iron ore, mixed and homogenized, and the homogenized raw material Take a small amount of the material for particle size test, pass a 100-mesh sieve, the sieve residue is 7.2%, which meets the raw material particle size requirements. The homogenized raw meal is sent to a rotary kiln for high-temperature calcination at a calcination temperature of 1360°C, and after cooling, cement clinker S-2 is prepared.
[0048] Fly ash aluminum residue includes the following components in weight ratio: CaO: 56.71, SiO 2 : 25.36, Al 2 O 3 : 4.62, Fe 2 O 3 : 2.48, MgO: 2.03, Na 2 O+0.66K 2 O: 0.52, loss on ignition: 8.28.
[0049] The chemical composition and rate value of the cement clinker S-2 prepared in this embodiment are shown in Table 3, and the physical and mechan...
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