Carbon source for refractory material and preparation method thereof
A refractory material and carbon source technology, applied in the field of refractory materials, can solve the problems of large density difference between nano-carbon and matrix materials, reduced thermal shock resistance and slag resistance, and uneven thermal conductivity, so as to improve the resistance to molten steel and Improve slag erosion performance, improve thermal shock resistance, and improve mechanical properties
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Embodiment 1
[0043] The carbon-coated magnesia particles prepared by the gas phase method are used as raw materials. The preparation method is to place the magnesia particles in a high-temperature furnace and raise the temperature to 900°C, and then pass the mixed gas of acetylene and nitrogen (the content of acetylene is 20%) into the cavity. , and reacted for 4 hours to prepare carbon-coated magnesia carbon source (the carbon content is about 1%, and the thickness of the carbon layer is about 15nm).
[0044] Depend on figure 1(a. magnesia raw material; b. magnesia after carbon coating; c. carbon shell: residue after hydrochloric acid treatment of carbon-coated magnesia) shows that the carbon-coated magnesia prepared in this example The magnesia carbon source maintains the basic morphology of the raw material, and the residue after hydrochloric acid treatment is a hollow carbon shell, which is consistent with the magnesia carbon source of the raw material, which proves the uniformity of c...
Embodiment 2
[0057] The carbon-coated corundum particles were prepared by the gas phase method. The preparation method was to place the corundum particles in a high-temperature furnace and raise the temperature to 950 ° C, and pass the mixed gas of acetylene and nitrogen (the content of acetylene was 30%) into the cavity, and react for 6 hours. Preparation of carbon-coated corundum carbon source. The carbon content is about 4.9%, and the thickness of the carbon layer is about 40nm.
[0058] passed the test, by Figure 8 (a. corundum particles; b. corundum carbon source after carbon coating) shows that the carbon-coated corundum carbon source prepared in this example maintains the basic morphology of the raw material, indicating that the carbon-coated Uniformity.
[0059] Depend on Figure 9 (Carbon-coated corundum carbon source) The transmission electron microscope image shows that the thickness of the carbon shell uniformly coated on the surface of corundum particles is about 40nm, and...
Embodiment 3
[0063] The carbon-coated mullite particles are prepared by the gas phase method. The preparation method is to place the mullite particles in a high-temperature furnace and raise the temperature to 850 ° C, and pass the mixed gas of acetylene and nitrogen (the content of acetylene is 25%) into the cavity , reacted for 8h, and prepared carbon-coated mullite carbon source. The carbon content is about 5.1%, and the thickness of the carbon layer is about 25nm.
[0064] passed the test, by Figure 12 (a. mullite particles; b. mullite carbon source after carbon coating) shows that the carbon coated mullite carbon source prepared in this embodiment maintains the basic morphology of the raw material, The uniformity of the carbon coating is indicated.
[0065] Depend on Figure 13 (Mullite carbon source after carbon coating) shows that the thickness of the carbon shell uniformly coated on the surface of mullite particles is about 25nm, and has good crystallinity.
[0066] Depend on ...
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Abstract
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