冷却方式对钛渣成分及酸解性能的影响

采用干法粒化、水冷和空冷等方法研究了冷却方式对钛渣的成分、物相及酸解性能的影响。结果表明:不同冷却方式处理的钛渣中低价钛氧化物含量均有所降低,粒化渣中Ti_2O_3含量最低。冷却渣中主要物相是TiO_2和(Fe Mg)_xTi_yO_5,但粒化渣中TiO_2主要是金红石型,而水冷渣和空冷渣中TiO_2主要是锐钛型。冷却渣酸解率均低于现场渣,水冷渣与空冷渣酸解率分别为90.61%和92.46%;粒化渣酸解率仅74.72%,较现场渣酸解率相差近20%。

Effect of Cooling Ways on Compositions and Acidolysis of Titanium Slag

The cooling treatment of titanium slag has an important influence on the subsequent titania pigment production.In this paper,the effect of cooling method for titanium slag,including granulating,water cooling and air cooling,on the compositions,phase and acidolysis performances of titanium slag was investigated.It is found that the titanium sesquioxide content in the slags is decreased using the cooling treatments mentioned above,of which the granulated slag has the lowest content of Ti2O3.The main phases are TiO2 and (FeMg)xTiyO5 in the cooled slags.The crystal form of TiO2 is rutile in granulated slag but anatase in water cooling or air cooling slag.The acidolysis rate of cooled slags is all less than that of the industrial titanium slag.The acidolysis rate is 90.61％ and 92.46％ for the water cooled slag and air cooled slag,respectively.However,the acidolysis rate of granulated slag is only 74.72％,about 20％ less than that of industrial titanium slag.