【摘要】：利用高磷鮞狀赤鐵礦制備碳化鐵,產(chǎn)物中含磷組分是影響碳化鐵質(zhì)量的關(guān)鍵因素。為了探究分離方式和添加劑對(duì)產(chǎn)物中含磷組分分離的影響,在1023K下分別用無(wú)添加、添加2%V2O5和添加5%Na2SO4的高磷鮞狀赤鐵礦制備碳化鐵,將制得的產(chǎn)物球磨不同時(shí)間后采用磁選或離心+磁選的方式進(jìn)行產(chǎn)物分離,最后分析產(chǎn)物中含磷組分的變化。結(jié)果表明,延長(zhǎng)球磨時(shí)間可以提高產(chǎn)物的脫磷率,但球磨時(shí)間過(guò)長(zhǎng)會(huì)降低產(chǎn)物的鐵收得率,以球磨2h為宜;無(wú)添加劑時(shí)制備所得碳化鐵試樣球磨時(shí)間從1h延長(zhǎng)至2h后,脫磷率從18.17%升至18.48%,再增加離心分離操作后,會(huì)進(jìn)一步提升產(chǎn)物的脫磷率至23.04%;添加5%Na_2SO_4和2%V_2O_5均可破壞鐵礦石的鮞狀結(jié)構(gòu),有利于含F(xiàn)e組分與脈石的分離,但添加Na_2SO_4會(huì)降低產(chǎn)物的碳化鐵含量,而V_2O_5的添加則可同時(shí)促進(jìn)碳化鐵的生成以及提高產(chǎn)物的脫磷率,是一種較好的添加劑。
[Abstract]:Iron carbide is prepared from high phosphorus oolitic hematite. The phosphorus content in the product is the key factor affecting the quality of iron carbide. In order to investigate the effect of separation methods and additives on the separation of phosphorus components in the product, iron carbide was prepared from high phosphorus oolitic hematite with no addition, addition of 2%V2O5 and 5%Na2SO4 at 1023K. After ball milling for different time, the product was separated by magnetic separation or centrifugal magnetic separation. Finally, the changes of phosphorus content in the product were analyzed. The results show that prolonging the milling time can increase the dephosphorization rate of the product, but too long milling time will reduce the iron yield of the product, which is suitable for 2 h ball milling, and the dephosphorization rate will be increased from 18.17% to 18.48% after the milling time is prolonged from 1 h to 2 h, and the dephosphorization rate will be further increased to 23.04% after increasing the centrifugal separation operation. The addition of 5%Na_2SO_4 and 2%V_2O_5 can destroy the oolitic structure of iron ore and is beneficial to the separation of Fe components from gangue, but the addition of Na_2SO_4 can reduce the content of iron carbide, while the addition of V_2O_5 can promote the formation of iron carbide and increase the dephosphorization rate of the product.
【作者單位】： 武漢科技大學(xué)省部共建耐火材料與冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室;武漢科技大學(xué)鋼鐵冶金及資源利用省部共建教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51374159)
【分類號(hào)】：TD951

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