Magnesium-calcium material and preparation method thereof
A technology of magnesia-calcium and magnesia-calcium sand, which is applied in the field of magnesia-calcium materials, can solve the problems of poor hydration resistance of magnesia-calcium bricks, cumbersome treatment process, and environmental pollution, and achieve improved hydration resistance, simple process, and environmental friendliness low effect
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Embodiment 1
[0026] A magnesium-calcium material and a preparation method thereof. First mix 65wt% magnesia-calcium sand particles, 28wt% magnesia-calcium sand fine powder, 3wt% cerium phosphate and 4wt% phosphotitanate, stir evenly, press into shape, and dry naturally for 23 hours; Dry for 10 hours at 1550°C, then fire for 3 hours at 1550°C, and cool to obtain a magnesium-calcium material.
[0027] The magnesium-calcium material prepared in this example is tested: the apparent porosity is 19.5%, and the compressive strength is 26.1MPa; it is maintained at 50°C and 90% humidity for 10 hours, and then dried at 110°C, the hydration of the magnesium-calcium material The weight gain rate is 0.59%; smelting at 1600°C for 30 minutes, the desulfurization efficiency of the metal melt is 50%.
Embodiment 2
[0029] A magnesium-calcium material and a preparation method thereof. First mix 69wt% magnesia-calcium sand particles, 26wt% magnesia-calcium sand fine powder, 2wt% cerium phosphate and 3wt% phosphotitanate, stir evenly, press into shape, and dry naturally for 20 hours; Drying at 1650°C for 8 hours, then firing at 1650°C for 4 hours, and cooling to obtain a magnesium-calcium material.
[0030] The magnesium-calcium material prepared in this example is tested: the apparent porosity is 17.5%, and the compressive strength is 27.6 MPa; it is maintained at 50°C and 90% humidity for 10 hours, and then dried at 110°C, the hydration of the magnesium-calcium material The weight gain rate is 0.51%; smelting at 1600°C for 30 minutes, the desulfurization efficiency of the metal melt is 52%.
Embodiment 3
[0032] A magnesium-calcium material and a preparation method thereof. First mix 70wt% magnesia-calcium sand particles, 20wt% magnesia-calcium sand fine powder, 5wt% cerium phosphate and 5wt% phosphotitanate, stir evenly, press into shape, and dry naturally for 30 hours; Dry at 1700°C for 16 hours, then burn at 1700°C for 2 hours, and cool to obtain a magnesium-calcium material.
[0033] The magnesium-calcium material prepared in this example is tested: the apparent porosity is 16.8%, and the compressive strength is 30.5MPa; it is maintained at 50°C and 90% humidity for 10 hours, and then dried at 110°C, the hydration of the magnesium-calcium material The weight gain rate is 0.45%; smelting at 1600°C for 30 minutes, the desulfurization efficiency of the metal melt is 53%.
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