论文部分内容阅读
使用攀西地区钛精矿生产的高钛渣为原料,利用冶金物理化学方法,通过不同的淬火温度来观察高钛渣中钛组分富集到金红石相的过程,分析金红石相结晶过程中析出长大的动力学规律。试验结果发现变温过程中促使金红石相的析出与长大是来自两个方面因素:一是晶粒自身浓度达到一定的饱和程度后进行自发的生长;另一方面是金红石晶体与渣体之间的界面产生应力使体系自由能升高导致的晶粒逐渐长大。其析出长大动力学可以用JMAK方程近似表示,并且其冷却速率越低,金红石相析出量越多、金红石相晶粒尺寸越大。
Using the high titanium slag produced in the titanium concentrate of Panxi region as raw material, metallurgical physical and chemical methods were used to observe the enrichment of the titanium component in the high titanium slag into the rutile phase through different quenching temperatures. The precipitation during the crystallization of the rutile phase The dynamics of growing up. The results showed that the rutile phase precipitated and grew up from two aspects in the process of temperature change: firstly, the spontaneous growth of the grain itself reaches a certain degree of saturation; on the other hand, the rutile crystal and the slag body Interface generated stress so that system free energy can lead to the gradual growth of grains. The precipitation kinetics can be approximated by the JMAK equation, and the lower the cooling rate, the more the rutile phase is precipitated and the larger the rutile phase grain size is.