含钛高炉碳化渣中TiC的超重力富集与分离的研究

The valued phase TiC was obtained from titanium-bearing blast furnace slag of PZH steel after carbonized at high temperature. However, the mass fraction of TiC could hardly be increased by traditional separating technique because of the fine size and dispersed distribution in carbonized slag. In this study, super gravity technology was introduced to investigate the enriching and separating behaviors of TiC in carbonized titanium-bearing blast furnace slag. The results showed that the obvious layered samples were obtained and all the TiC phase gathered at the second half of the sample without finding any TiC phase at the first half of the sample after super gravity treatment. What's more, the area fraction of TiC increased with the position approaching the bottom of the sample along the direction of super gravity field and the enriching effect of TiC increased with the gravity coefficient and treatment time increasing. With the gravity coefficient of G=300 and T=1320 ℃ for 20 min, the mass content of TiC in the enriched slag increased from 11.6% of normal gravity to 18.8%. In addition, TiC phase was intercepted on the carbon fiber felt and the gangue phase was separated to the bottom of the crucible by super gravity filtration method. After separation at the gravity coefficient of G=300 and T=1320 ℃ for 20 min, the mass fraction of TiC was up to 23.8% in the concentrate and no TiC phase could be found in the gangue phase.