攀枝花钛渣微波处理新工艺研究

Study on new process of microwave treatment of Panzhihua titanium slag

本文以攀枝花钛渣作为研究对象,研究了碳酸钠改性、微波焙烧、磷酸浸出和微波煅烧联合处理工艺对钛渣晶型转变行为的影响规律。在碳酸钠改性过程中,钛渣与改性剂的配比为1∶0.3;在微波焙烧过程中,焙烧温度为900℃,焙烧时间为2h;在磷酸浸出过程中,磷酸质量分数为30%,浸出时间为5h;在微波煅烧过程中,煅烧温度为875℃,煅烧时间为0.5h。钛渣和煅烧产物的晶型结构、微观形貌和表面官能团分别采取了XRD、SEM和FT-IR进行分析。XRD分析表明,处理后的样品主峰为金红石型二氧化钛;SEM分析表明,短棒状的二氧化钛结构从样品内部生长出来;FT-IR分析表明,金红石型二氧化钛的吸收峰在546.77cm^(-1)的位置发生明显的蓝移,此方法能够有效的处理物相结构复杂的钛铁矿来制备人造金红石。

Panzhihua titanium slag has been investigated in this paper, the effects of sodium carbonate modification, microwave roasting; phosphoric acid leaching and microwave calcinations on the heating behavior of titanium slag are studied. In the process of sodium carbonate modification, titanium slag and sodium carbonate mass ratio is 1 ： 0.3 ; In the process of microwave roasting, the roasting temperature is 900~C, and the roasting time is 2 hours ; In the process of phosphoric acid leaching, the mass fraction of phosphoric acid solution is 30% and leaching 5h; In the process of microwave calcinations, the calcinations temperature is 875 ~C, and the calcinations time is 0.5h. The crystal structure, microstructure and surface functional groups of titanium slag and calcined product are analyzed by XRD, SEM and FT - IR, respectively. XRD analysis shows that the main peak of sample is futile titanium diox- ide; SEM can be seen that a short rod -like structure of titanium dioxide is grown from the inside of the sample; the FT -IR analysis shows that the peak of the absorption of rutile occurs blue shifted at 546.77cm - 1. This method can effectively deal with complex titanium - containing mineral for the prepara- tion of synthetic futile.