Method for improving strength of low-carbon magnesium-carbon material
A magnesium-carbon, high-strength technology, applied in the field of refractory materials, can solve problems such as insufficient strength of magnesium-carbon materials, and achieve the effects of improving mechanical properties, increasing costs, and reducing costs
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Embodiment 1
[0025] A method for improving the strength of low-carbon magnesia-carbon materials, made by the following steps:
[0026] (1) Mixing. Add magnesia (85%), carbon (5%), antioxidant (4%), binder (4%), silicon-rich waste (2%) raw materials step by step according to the mass fraction and mix them in the mixer .
[0027] (2) Forming. Pour the above configured powder into a stainless steel mold and press it on a hydraulic press at 150 MPa.
[0028] (3) Heat treatment. Insulated at 180 °C for 15 h to make non-burning low-carbon magnesium-carbon materials.
[0029] Among them, the carbon is 3% flake graphite and 2% nano-carbon black; the antioxidant is aluminum powder; the binder is tar pitch; the silicon-rich waste consists of Si (50%), SiC (30%), SiO 2 (8%), other impurities (12%).
[0030] The relevant performance indicators of this embodiment are as follows:
[0031] The apparent porosity is 8.76%, and the bulk density is 3.02 g cm -3 , The compressive strength at room temp...
Embodiment 2
[0033] A method for improving the strength of low-carbon magnesia-carbon materials, made by the following steps:
[0034] (1) Mixing. Add magnesia (86%), carbon (8%), antioxidant (1%), binder (1%), silicon-rich waste (4%) raw materials step by step according to the mass fraction and mix them in the mixer .
[0035] (2) Forming. Pour the above configured powder into a stainless steel mold and press it on a hydraulic press at 200 MPa.
[0036] (3) Heat treatment. The sintered carbon-magnesium-carbon material was prepared at 1400 °C for 6 h.
[0037] Among them, the carbon is flake graphite; the antioxidant is aluminum powder; the binder is tar pitch; the silicon-rich waste consists of Si (60%), SiC (20%), SiO 2 (10%), other impurities (10%).
[0038] The relevant performance indicators of this embodiment are as follows:
[0039] The apparent porosity is 7.52%, and the bulk density is 3.09 g cm -3 , The compressive strength at room temperature is 62.17 MPa, the flexural s...
Embodiment 3
[0041] A method for improving the strength of low-carbon magnesia-carbon materials, made by the following steps:
[0042] (1) Mixing. Add magnesia (90%), carbon (6%), antioxidant (2%), binder (1%), silicon-rich waste (1%) raw materials step by step according to the mass fraction and mix them in the mixer .
[0043] (2) Forming. Pour the above configured powder into a stainless steel mold and press it on a hydraulic press at 200 MPa.
[0044] (3) Heat treatment. Insulated at 230 °C for 10 h to make unburned carbon-magnesium-carbon materials.
[0045] Among them, the carbon is 3% flake graphite and 3% nano-carbon black; the antioxidant is silicon powder; the binder is tar pitch; the silicon-rich waste consists of Si (54%), SiC (26%), SiO 2 (7%), other impurities (13%).
[0046] The relevant performance indicators of this embodiment are as follows:
[0047] The apparent porosity is 7.61%, and the bulk density is 3.08 g cm -3 , The compressive strength at room temperature ...
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