Low carbon magnesium carbon brick containing B4C-C composite powder and nano TiC powder, and method of manufacturing the same
A B4C-C, composite powder technology, applied in the field of low-carbon magnesia-carbon brick refractory materials, can solve the problems of high cost and unfavorable material performance, and achieve the effect of low cost, good anti-oxidation effect and high temperature strength
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Embodiment 1
[0015] a B 4 C-C composite powder and nano-TiC powder low-carbon magnesia-carbon brick and preparation method thereof, comprising 70-75wt% magnesia particles, 15-20wt% magnesia fine powder, 2-5wt% coarse-grained flake graphite, 1-3wt% fine-grained flake graphite, 0.5-1.5wt% carbon black, 1-2wt% metal aluminum powder, 1-3wt% metal silicon powder, 0.8-1wt% B 4 The C-C composite powder is mixed with 0.05-0.2wt% of nano TiC powder, and 3-5wt% of thermosetting liquid phenolic resin is added. After kneading and compression molding, the molding pressure is 200MPa; then heat treatment at 180-240°C for 24 hours to obtain B-containing 4 Low-carbon magnesia-carbon brick products of C-C composite powder and nano-TiC powder.
[0016] In the present embodiment 1, the MgO content of magnesia particle is 94~99wt%, and particle size is 5~0.088mm; The MgO content of magnesia fine powder is 94~99wt%, and particle size is less than 0.088mm; The carbon content of fine-grained flake graphite is ...
Embodiment 2
[0019] a B 4 C-C composite powder and nano-TiC powder low-carbon magnesia-carbon brick and preparation method thereof, comprising 60-70wt% magnesia particles, 18-30wt% magnesia fine powder, 2-3wt% coarse-grained flake graphite, 1-3wt% fine-grained flake graphite, 0.5-1.5wt% carbon black, 1-2wt% metal aluminum powder, 2-3wt% metal silicon powder, 0.1-0.8wt% B 4 The C-C composite powder is mixed with 0.2-0.4 wt% nano TiC powder, and 3-5 wt% of thermoplastic liquid phenolic resin is added. Others are with embodiment 1.
[0020] The prepared B-containing 4 C-C composite powder and nano-TiC powder low-carbon magnesia-carbon bricks, the performance test results show: 1400 ℃ buried carbon high temperature flexural strength 17.8Mpa; 1400 ℃ 2h heat preservation in air atmosphere for oxidation test, the decarburization layer area percentage is less than 13%; thermal shock test at 1200°C for 0.5h, the residual flexural strength retention rate is 90%; slag resistance test at 1600°C for...
Embodiment 3
[0022] a B 4 C-C composite powder and nano-TiC powder low-carbon magnesia-carbon brick and a preparation method thereof. 68-74wt% of magnesia particles, 15-22wt% of magnesia fine powder, 2-4wt% of coarse-grained flake graphite, 2-4wt% of fine-grained flake graphite, 0.5-1.5wt% of carbon black, 1 ~3wt% metal aluminum powder, 1~2wt% metal silicon powder, 0.1~1.0wt% B 4 The C-C composite powder is mixed with 0.05-0.4% nanometer TiC powder, and 3-5 wt% of coal tar pitch and solid powdery phenolic resin mixed resin are added. Others are with embodiment 1.
[0023] The prepared B-containing 4C-C composite powder and nano-TiC powder low-carbon magnesia-carbon bricks, the performance test results show: 1400 ℃ buried carbon high temperature flexural strength 18.2Mpa; 1400 ℃ 2h heat preservation in air atmosphere for oxidation test, the decarburization layer area percentage is less than 11%; thermal shock test at 1200°C for 0.5h, the residual flexural strength retention rate is 89%;...
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