Method and apparatus for modifying pozzolanic activity of mineral material

Abstract

The invention relates to a method and an apparatus for modifying the pozzolanic activity of a mineral material. The apparatus comprises devices of a gas bottle, a feeding cabin, a fluidized bed container, a pressure reduction cylinder, a finished product collection container, a modifier container, an atomizer, a nozzle, a dust collector and the like, and gas tubes, a water tube, a material tube and a heating tube for connecting the devices. The method concretely comprises the following steps: fully mixing an atomization modifier with the mineral material in the fluidized bed container, and carrying out thermal treatment by the heating tube to make modifier particles and mineral particles be tightly combined, wherein the modifier can most effectively excite the hydration activity of the mineral material. The method has the characteristics of high efficiency of the mixing of the modifier with the mineral material, and good excitation effect on the hydration activity of the mineral material.

Description

technical field [0001] The invention relates to a mineral material pozzolanic active modification method and a modification device. Background technique [0002] Mineral materials with pozzolanic activity such as slag powder and fly ash have been widely used in concrete. Their role is not only to achieve energy conservation and environmental protection through the use of industrial waste residues, but more importantly, through the application of these materials, the performance of concrete has been significantly improved. . The reaction between mineral materials and cement hydration product calcium hydroxide is called pozzolanic reaction, and its reaction ability is called pozzolanic activity or hydration activity of mineral materials. Due to the low pozzolanic activity of some mineral materials such as fly ash, the strength of concrete prepared by using them instead of cement, especially the early strength, is reduced, thus limiting its content in concrete. [0003] The p...

AI Technical Summary

Problems solved by technology

Due to the low dosage of the excitation material, generally less than 1% of the mass of the mineral material, it is difficult to fully mix it with the mineral material by dry mixing or mixed grinding. Due to the limitation of the solubility of the excitation material, the method of dissolving it into the mixing water It is also difficult to achieve an effective amount of activated material, and the alkali activated material that is easily soluble in water will have an adverse effect on the setting time of cement

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