钛渣制备人造金红石的试验研究.pdf

第21卷第4期
矿冶
2012年12月
MINING & METALLURGY
December 2012
文章编号:1005-7854(2012)04-0050-04
钛渣制备人造金红石的试验研究
范艳青蒋训雄汪胜东蒋伟冯林永张登高刘巍
(北京矿冶研究总院,北京100160)
摘要:对钛渣制备人造金红石进行了研究,通过在高温下NaOH与钬渣中含硅矿物的反应,破坏对
杂质铁形成包裹的硅酸盐,焙砂水浸脱硅后,再经酸浸除铁等杂质,煅烧得到T02含量大于92%的高
品质人造金红石。通过考察影响因素,确定钛渣制备人造金红石最佳工艺参数。按钛渣中铝、硅含量理
论计算的4.5倍摩尔比加入氧氧化钠混匀,在900℃焙烧2h。焙砂在液固比1:1、常温下水浸出1h脱
硅;水洗样在液固比4:1,盐酸浓度18%,浸出温度90℃,浸出时间4h条件下进行了酸浸除杂;酸浸样
在900℃下煅烧1h制备人造金红石产品
关键词:钛渣;人造金红石;碱焙烧;酸浸
中图分类号:TP823文献标志码:Adoi:10.3969/jis1005-7854.2012.04.013
EXPERIMENTAL STUDY ON PREPARATION OF
SYNTHETIC RUTILE BY TITANIA SLAG
FAN Yan-qing JANG Xun-xiong WANG Sheng-dong JANG Wei FENG Lin-yong
ZHANG Deng-gao LIU Wei
Beijing General Research Institute of Mining and Metalurgy, Beiing 100160, China
ABSTRACT: Study of synthetic rutile preparation by titania slag is present. Through the reaction between NAOH
and the silica contained minerals in titania slag under high temperature, the silicates which includes the impurity i-
ron is destroyed. After desilication by calcine leaching and iron impurity removal by acid leaching, the high quality
synthetic rutile with Tio content over 92%o can be obtained by calcinations, By examining the effecting factors, the
optimize process parameters of synthetic rutile preparation by titania slag are determined. Adding 4. 5 times molar
ratio to theoretical calculated aluminum and silica content in titania slag of NAOH and uniformly mixed, roasting for
2 hours under temperature of 900. Under conditions of liquid and solid ratio 1: 1, the calcine shall be desilicated
oy water leaching 1 hour under normal temperature; under conditions of liquid solid ratio 4: 1, hydrochloric acid
content 18%, leaching temperature 90C, the acid leaching impurity removal is carried on by
achim
4
And the synthetic rutile can be obtained by roasting acid leaching product for 1 hour under the temperature of900c
KEY WORDS: titania slag; synthetic rutile; alkali roasting; acid leach
钛白粉被认为是目前世界上性能最好的一种白有硫酸法和氯化法两种。
色颜料、重要的精细化工材料,广泛用于涂料、塑料、
硫酸法生产钛白粉的主耍弊端是废物排放量较
造纸、化纤、橡胶、油墨和搪瓷等行业,其中涂料行业大。氯化法生产钛白粉不仅产品质量好,而且生产
是钛白粉的最大用户。工业生产钛白粉的方法主要过程中“三废”少,容易治理,因此采用氯化法生产
钛白粉是社会和经济发展的必然趋势,是中国钛工
收稿日期:2011-12-07
业的发展方向2。
作者简介:范艳青,高级工程师,从事有色金属冶金工艺研究。
电炉熔炼钛渣的品位较低,TiO2含量为70%