A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A method for processing ardealite by using a fluidized bed furnace to prepare a special anhydrite cementing material comprises the following steps that (1) materials are prepared, namely caked ardealite and massive stone coal or waste rock ballast is crushed; (2) burdening is performed, namely 50 to 80 parts of ardealite, 8 to 25 parts of stone coal and 10 to 40 parts of waste rock ballast are burdened and metered by weight; (3) matured slag is prepared, namely the materials are continuously fed into the fluidized bed furnace and calcined in the oxidative atmosphere at the temperature of 850 to 1280 DEG C for 0.3 to 1.5 hours, the materials overflowing from a discharging port are rapidly quenched to be made into the matured slag; (4) the special anhydrite cementing material is prepared, namely the matured slag is grinded into 80-micron powder containing smaller than or equal to 20% of screen residue mass, and the special anhydrite cementing material is obtained. The special anhydrite cementing material prepared by means of the method contains multiple hydrated active minerals, can be widely used in the cement industry, is high in strength in use and can serve as active residue powder or be used for production of construction materials. By means of the method, investment is small, no wastewater and waste residue is produced, and economical efficiency is high.
A method for processing ardealite by using a fluidized bed furnace to prepare a special anhydrite cementing material comprises the following steps that (1) materials are prepared, namely caked ardealite and massive stone coal or waste rock ballast is crushed; (2) burdening is performed, namely 50 to 80 parts of ardealite, 8 to 25 parts of stone coal and 10 to 40 parts of waste rock ballast are burdened and metered by weight; (3) matured slag is prepared, namely the materials are continuously fed into the fluidized bed furnace and calcined in the oxidative atmosphere at the temperature of 850 to 1280 DEG C for 0.3 to 1.5 hours, the materials overflowing from a discharging port are rapidly quenched to be made into the matured slag; (4) the special anhydrite cementing material is prepared, namely the matured slag is grinded into 80-micron powder containing smaller than or equal to 20% of screen residue mass, and the special anhydrite cementing material is obtained. The special anhydrite cementing material prepared by means of the method contains multiple hydrated active minerals, can be widely used in the cement industry, is high in strength in use and can serve as active residue powder or be used for production of construction materials. By means of the method, investment is small, no wastewater and waste residue is produced, and economical efficiency is high.
Method for preparing anhydrite cementing material from ardealite
| European Patent Office | 2023
Anhydrite cementing material for constructional engineering
| European Patent Office | 2022
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Natural anhydrite-based cementing material and preparation method thereof
| European Patent Office | 2021