选用信阳天然膨润土为原料,对其进行提纯,以提纯的膨润土为基础对其进行钠化改型。探索了钠化剂、钠化剂用量、钠化时间、矿浆浓度对钠化效果的影响。用钠化土的膨胀倍和X射线衍射图谱对钠化效果进行检验。结果表明:较佳的钠化剂为焦磷酸钠,钠化剂用量为4%,钠化时间为20min,矿浆浓度为10%。通过钠化改型后的信阳膨润土的膨胀倍从38mL/g提高到了98mL/g。 Xinyang natural bentonite was chosen as raw material, which was purified to sodium modification based on purified bentonite. The effects of sodium agent, sodium agent, sodiumization time and pulp concentration on sodiumification were explored. The sodium expansion effect and the X-ray diffraction pattern were used to test the sodium effect. The results showed that the best sodium alginate was sodium pyrophosphate, the sodium alcoholate dosage was 4%, the sodium alcoholate time was 20min and the pulp concentration was 10%. The swelling ratio of Xinyang bentonite modified by sodium modification increased from 38mL / g to 98mL / g.