摘要:攀西地区钒钛磁铁矿是世界著名的多金属共（伴）生矿床，其中，钛资源储量占世界第一位。但到目前为止，矿石中钛资源的利用率却很低，约为15％左右。其主要原因就是原矿中约有50%以上的钛随铁精矿经高炉炼铁后进入炉渣成为含钛高炉渣。这种含钛高炉渣中TiO2含量高达20～26%。攀钢在1970-1992年生产期间堆置在金沙江畔的西渣场的高炉渣就达3000多万吨，若TiO2含量以20%计，仅西渣场的高炉渣中TiO2的含量就高达600多万吨，此后每年新增至少60万吨TiO2。据此估计，到目前为止，攀枝花高炉渣中TiO2的总量已近2500万吨左右，这无疑是一个巨大的钛资源宝藏。但它却与高炉渣一起作为工业固体废弃物堆积金沙江边，不仅未能得到利用，还为当地造成极大的环境问题和经济负担。如何开发利用这种人造二次资源的高钛型高炉渣，尤其是其中的钛资源已成为一个重要的迫切课题。
本文针对攀枝花高钛型高炉渣中的钛含量高，分离提取技术难度大，至今未能得到利用的难题，根据其组分以及组构特点，采用低温化学分离提取法，将含钛高炉渣中的其它主要杂质组分除去，使钛富集成可用于工业生产的富钛料。
由于使用硫酸浸取含钛高炉渣时生成会生成硫酸钙胶状物，影响高炉渣的进一步的浸出，浸出后含钛高炉渣的TiO2品位仅为38.52%，因此本文选用盐酸作为浸取剂，而且 TiO2在整个反应过程（酸溶和水解过程）中其实并没有消耗稀盐酸这一原理，先利用盐酸除杂能力强这一特点，用适量的盐酸除去高炉渣中的 Ca，Mg，Al 等有价元素，使高炉渣中的钛组分以H2TiO3的形式进入渣中，将钛富集于滤渣中，然后通过后续处理从滤渣中提取钛。在对液固比等于20的情况下，主要考察了盐酸浓度、反应时间、反应温度及搅拌速度等因素对含钛高炉渣TiO2品位的影响。并通过实验找出了钛组分富集的最佳条件为，盐酸浓度 3mol/L，反应温度50℃，时间30min，搅拌速度150r/min。
关键词：含钛高炉渣 盐酸 浸出
ABSTRACT:The vanadium titanium magnetite in Panxi areas is the world’s leading multi-metal deposits, in which the titanium resource is very rich specially. But as so far, the utilization rate of titanium in the vanadium titanium magnetite was only 15%. About 50% titanium with the iron ore was entry into blast furnace to become blast furnace slag. The quantity of TiO2 in this blast furnace slag was about 20-26%. During 1970-1992, Panzhihua Iron and Steel Co. has been produced more than 30 million tons of slag which was posed in the West slag champ of Jinsha River bank, So there are about more than 600 million tons of TiO2 contained by the blast furnace slag only in the West slag champ, and add at least 600 thousand tons of TiO2 per year. According estimates, as so far, the amount of TiO2 has been nearly 25 million tons, this is undoubtedly a great treasure of titanium resources. But, together with the slag, it was heaped up at the Jinsha River bank as industrial solid waste which not only could not be utilized but also caused grave environmental and economic burden for the local place. How to develop and utilize this so high artificial titanium slag of secondary resources, particularly its titanium resources, has become an important and urgent issue.
In this paper, a low temperature chemical method was used to separate titanium component from the Ti-bearing blast furnace slag according to its component performance characteristics. After the impurity components such as SiO2, MgO, CaO and Al2O3 et al. were removed from the blast furnace slag, the titanium enriched relatively and which can be used for industrial production as titanium-rich materials.
Because of use sulfuric acid to leach blast furnace slag will produce calcium sulfate jelly, which could affecting the further leaching of slag, so in this paper hydrochloric acid was used as leaching agent. With a small amount of hydrochloric acid in the treatment of the Ti-containing slag to study the experimental conditions, mainly investigated the hydrochloric acid concentration, reaction time, reaction temperature and slag/acid mass ratio and so on, which effects the leaching rate on the titanium slag of calcium, magnesium, aluminum, titanium. And the experiment to find the best conditions of enrichment of titanium group, the concentration of hydrochloric acid 3mol/l, reaction temperature 50 ℃, time 30min, stirring speed 150r/min.
Keyword：Ti-bearing slag；Hydrochloric acid；Leaching
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