Electric heating cement plate and preparation method thereof
A cement and plate technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem of preparing electric cement plate without graphite mining waste rock and spherical graphite tailings, so as to reduce volume resistivity, Low volume resistivity, high compression effect
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[0025] The embodiment of the present application provides a preparation method of an electrothermal cement board, comprising the following steps:
[0026] S1. Graphite mining waste rock is pre-crushed;
[0027] S2. Place the crushed graphite mining waste rock in a grinding machine for grinding treatment;
[0028] S3. The graphite mining waste rock, cement, water and spherical graphite tailings after grinding treatment are mixed and added to the mold, then electrodes are inserted into both sides of the mold, demould after curing, continue curing, and dry. Electric heating cement board.
[0029] It should be noted that, in the preparation method of the electric heating cement board of the present application, graphite mining waste rock and spherical graphite tailings are selected as the main raw materials, and the obtained electric heating cement board has an effective heating function, low energy consumption, and environmental protection value. more and more in line with mark...
Embodiment 1
[0045] The embodiment of the present application provides a preparation method of an electrothermal cement board, comprising the following steps:
[0046] S1. Graphite mining waste rock is crushed to suitable size by jaw crusher and counter-roll crusher;
[0047] S2. Place the graphite mining waste rock of S1 in a grinding machine, and grind for 15 minutes at a rotational speed of 70 r / min and a grinding mass fraction of 60%;
[0048] S3. The graphite mining waste rock after grinding is then matched according to the following gradation table:
[0049] Grain size / mm 4.75 2.36 1.18 0.60 0.30 0.15 0.075 0.00 Cumulative sieve residue / % 3.36 55.47 75.37 82.35 86.50 91.65 96.31 100.00
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[0050] S4. Mix 52.5 grade cement and water evenly in the mixing pot, then add the graphite mining waste rock after grinding in step S3, continue to stir, pour the evenly stirred material into the mold, and then insert stainless steel into both sides of the mold...
Embodiment 2
[0054] The embodiment of the present application provides a preparation method of an electrothermal cement board, which is the same as that of Embodiment 1, except that the grinding mass fraction in step S2 is 40%, and the rest of the process is the same as that of Embodiment 1.
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