Method for enhancing thermal shock resistance of low-carbon magnesium-carbon material
A technology of thermal shock resistance and magnesium carbon, which is applied in the field of high-temperature materials, can solve problems such as deterioration of thermal shock resistance, achieve the effect of improving thermal shock resistance and saving raw material costs
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Embodiment 1
[0022] A method for enhancing the strength of a low-carbon magnesia-carbon material, the specific steps mainly including grinding and mixing, molding and heat treatment. First in the following order (mass fraction): 20% 5~3 mm sintered magnesia → 45% 3~1 mm sintered magnesia → 3% pitch and phenolic resin → 22% silicon carbide ceramic waste → 6% carbon → 4 % Al-Mg alloys are added at various levels and mixed uniformly in the mixer. Then the sample was pressed into a cylindrical sample with a size of 50 × 50 mm, and finally heat-treated at 200 °C for 8 h to obtain an unburned low-carbon magnesia-carbon material.
[0023] Among them, the chemical composition of silicon carbide ceramic waste is SiC (85%), SiO 2 (10%), impurities (5%). The secondary molding pressures were 30 MPa and 300 MPa, respectively.
[0024] The thermal shock resistance index of this embodiment is as follows:
[0025] Heating-water cooling method: 6 times; heating-air cooling method: 32 times; strength re...
Embodiment 2
[0027] A method for enhancing the strength of a low-carbon magnesia-carbon material, the specific steps mainly including grinding and mixing, molding and heat treatment. First follow the following order (mass fraction): 25% 5~3 mm sintered magnesia → 40% 3~1 mm sintered magnesia → 4% pitch and phenolic resin → 20% silicon carbide ceramic waste → 8% carbon → 3 % Al-Mg alloys are added at various levels and mixed uniformly in the mixer. Then the sample was pressed into a cylindrical sample with a size of 50 × 50 mm, and finally heat-treated at 200 °C for 8 h to obtain an unburned low-carbon magnesia-carbon material.
[0028] Among them, the chemical composition of silicon carbide ceramic waste is SiC (87%), SiO 2 (10%), impurities (3%). The secondary molding pressures were 40 MPa and 300 MPa, respectively.
[0029] The thermal shock resistance index of this embodiment is as follows:
[0030] Heating-water cooling method: 6 times; Heating-air cooling method: 30 times; Strengt...
Embodiment 3
[0032] A method for enhancing the strength of a low-carbon magnesia-carbon material, the specific steps mainly including grinding and mixing, molding and heat treatment. First in the following order (mass fraction): 21% 5~3 mm sintered magnesia → 40% 3~1 mm sintered magnesia → 5% pitch and phenolic resin → 25% silicon carbide ceramic waste → 6% carbon → 3 % Al-Mg alloys are added at various levels and mixed uniformly in the mixer. Then the sample was pressed into a cylindrical sample with a size of 50 × 50 mm, and finally heat-treated at 200 °C for 8 h to obtain an unburned low-carbon magnesia-carbon material.
[0033] Among them, the chemical composition of silicon carbide ceramic waste is SiC (90%), SiO 2 (5%), impurities (5%). The secondary molding pressures were 50 MPa and 300 MPa, respectively.
[0034] The thermal shock resistance index of this embodiment is as follows:
[0035] Heating-water cooling method: 8 times; Heating-air cooling method: 36 times; Strength ret...
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