将下面的语句翻译成英文：目前氟碳铈矿的主要冶炼工艺为氧化焙烧酸浸工艺在稀土的焙烧和提取过程中氟化氢的逸出与稀土氟化物的产生难以避免抑制了了稀土元素的浸出、分离和提纯。

Currently, the main smelting process for fluorocarbon cerium ore is the oxidative roasting-acid leaching process. During the roasting and extraction process of rare earths, the escape of hydrogen fluoride and the production of rare earth fluorides are difficult to avoid, which hinders the leaching, separation, and purification of rare earth elements.