针对风化壳淋积型稀土矿的特点，对田菁胶进行了次氯酸钠氧化改性、羧甲基化改性和磷酸酯化改性，考察原胶及改性胶对浸矿速度的影响。试验结果表明，加入田菁胶后，改善了滤饼的过滤性能，减少了交换过程中的扩散阻力，在保证稀土浸出率的前提下，提高了过滤强度，起到了絮凝和助滤的作用。 According to the characteristics of weathering crust-deposited rare earth ore, sodium hypochlorite was modified by oxidative modification of sodium hypochlorite, modified by carboxymethylation and modified by phosphatization. The effects of gelatin and modified rubber on the leaching rate were investigated. The results showed that the addition of Sesbania gum improved the filtration performance of the filter cake and reduced the diffusion resistance during the exchange process. Under the precondition of ensuring the leaching rate of rare earths, the filtration strength was improved and flocculation and filtration aid were played.