本文選題：海濱鈦磁鐵礦 + 直接還原��； 參考：《中國有色金屬學報》2017年08期

【摘要】：針對內配煤直接還原鈦磁鐵礦引入灰分和雜質從而降低鈦產品品位的問題,利用包埋法進行直接還原,將無碳球團包埋在煤中,并分別以螢石和硫酸鈉為添加劑,探討此工藝的可行性及添加劑對還原的影響。結果表明:利用此工藝可實現(xiàn)鐵還原的同時獲得高品位鈦產品的目標,且添加硫酸鈉的效果優(yōu)于添加螢石的效果;添加適量的螢石或硫酸鈉均促進鈦磁鐵礦的還原,鈦礦物由含鈦低的鈦鐵尖晶石向含鈦高的鈦鐵礦和亞鐵板鈦礦轉變。金屬鐵顆粒長大有利于鈦鐵分離并分別富集,鈣長石、霞石和Fe S的形成是分別促進鐵顆粒長大的原因,但添加過量的螢石和硫酸鈉導致還原生成的金屬鐵聚集相連,阻礙氣體擴散,不利于含鈦礦物的還原。
[Abstract]:Aiming at the problem of introducing ash and impurity into titanium magnetite by direct reduction of ilmenite by internal coal blending, direct reduction of titanium product grade was carried out by means of embedding method, and carbon-free pellets were buried in coal, and fluorite and sodium sulfate were used as additives, respectively. The feasibility of this process and the effect of additives on reduction were discussed. The results show that the process can achieve the goal of iron reduction and high grade titanium product, and the effect of adding sodium sulfate is better than that of adding fluorite, adding appropriate amount of fluorite or sodium sulfate can promote the reduction of titanomagnetite. The transformation of titanium minerals from low titanium-bearing ferric spinel to titanium-containing high ilmenite and ferrous plate titanate. The formation of calcium feldspar, nepheline and FeS is the reason of promoting the growth of iron particles, but the addition of excess fluorite and sodium sulfate leads to the aggregation of metal iron produced by reduction. It hinders the gas diffusion and the reduction of titanium-bearing minerals.
【作者單位】： 北京科技大學土木與環(huán)境工程學院;清華大學環(huán)境學院;
【基金】：國家自然科學基金資助項目(51474018)~~
【分類號】：TD95

【相似文獻】

相關期刊論文 前5條

1 李命森;走向市場 用戶至上——平定縣鈦鐵廠抓質量記實[J];經濟問題;1989年03期

2 宋鴻玉;;越南鈦鐵精礦因無法出口和加工致使庫存增加[J];中國鈦業(yè);2012年04期

3 劉磊,周道玉,陸坤,奚大順;高精度鈦鐵含量分析儀及其應用[J];物探化探計算技術;1996年S5期

4 陳祿政;廖國平;徐國棟;錢枝花;;某低品位鈦鐵砂礦選礦工藝研究[J];金屬礦山;2011年05期

5 張予釗;馬頭山輝綠巖型鈦鐵礦石選礦工藝流程研究[J];礦產綜合利用;1994年05期

，

本文編號：1813717