Method for preparing high-calcium fly-ash cement with high-calcium fly-ash
A high-calcium fly ash and cement technology, which is applied in cement production and other directions, can solve the problems of difficult operation of fly ash humidity control process, high cost of modified fly ash, and difficult automatic operation, etc., and achieves remarkable digestion effect , Improve ball milling efficiency and reduce manufacturing cost
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Embodiment 1
[0029] Cement clinker is high-quality clinker produced by high-quality rotary kiln production lines.
[0030] Natural gypsum: Gypsum or anhydrite that should meet the requirements of GB / T 5483 Class G or Class A Class II (inclusive) or above. Industrial by-product gypsum: a by-product of industrial production with calcium sulfate as the main component. When industrial by-product gypsum is used, it must be tested and proved to be harmless to water performance.
[0031] The slag is granulated blast furnace slag conforming to GB / T203.
[0032] High-calcium ash is desulfurized high-calcium ash produced by thermal power plant fly ash or low-calcium fly ash with calcium oxide content greater than 10% through desulfurization and calcium enhancement.
[0033] The digestion agent is the liquid or solid free calcium oxide digestion material described in the patent application No. 200810017534.X. Implementation steps:
[0034] (1), at first a combustion chamber is set at the head of ...
Embodiment 2
[0039] 70 parts of cement clinker; 20 parts of high-calcium fly ash; 5 parts of gypsum; The sieve residue is less than 15% with a grinding particle size of 45 microns, and the obtained fly ash cement meets the indicators specified in GB 1344-1999 "National Standards for Slag Portland Cement, Pozzolanic Portland Cement and Fly Ash Portland Cement" , other steps are with embodiment 1.
Embodiment 3
[0041] Cement clinker: 65 parts; high-calcium fly ash 25 parts; gypsum 5 parts; blast furnace slag: 5 parts; external digestion agent is 1.5 parts of high-calcium fly ash weight; control the maximum temperature of the material in the mill to 150 ° C, The particle size of the cement is 45 microns, and the sieve residue is less than 15%. The obtained fly ash cement meets the provisions of GB 1344-1999 "National Standards for Slag Portland Cement, Pozzolanic Portland Cement and Fly Ash Portland Cement" The index, other steps are with embodiment 1.
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