摘要
本文以拜耳法赤泥固化堆存为背景,研究了拜耳法赤泥的物理特性和自然沉降特性,比较了不同促沉剂在不同掺量条件下对赤泥浆体沉降性能的影响;通过正交试验优选出赤泥促沉剂的合理配比:腐植酸钠/萘系减水剂/六偏磷酸钠/十二烷基苯磺酸钠=1/11/2/3,在浓度为40%的赤泥浆体中掺用3.4‰的促沉剂,沉降8 h后沉降层浆体浓度可以达到52.6%,24 h后沉降层浓度可以达到59.8%;与自然沉降24 h相比,沉降层浓度提高了27%;对强化浓缩赤泥进行固化,并与自然沉降赤泥固化体相比,内聚力提高了50%,提高了固化堆存的稳定性和安全性。
The physical characteristics and sedimentation Speciality of the Bayer red mud was studied according to the need of pile-up in this paper, compared the effect of different promoting settling agent for the settlement of red mud; The Reasonable proportion of the promoting settling agents was found through the orthogonal experiment： NaHm/FDN/SHMP/SDBS = 1/11/2/3, In the concentration of 40% of the red mud mixed with 3.4%o promote settling agent, after 8 h the sedimentation layer concentration can reach 52.6% ,after 24 h the sedimentation layer concentration can reach 59.8%. Compared with natural sedimentation 24 h, settlement layer concentration improved by 27% ; To strengthen the concentrated red mud for curing, compared with natural sedimentation red mud solidified body, the cohesion increased by 50%, which improves the stability and safety of curing pile-up.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2013年第4期732-737,共6页
Bulletin of the Chinese Ceramic Society
基金
国家安监总局2010年度重大事故预防重点科技计划项目(安监总科技[2010]89号
10-008)
关键词
拜耳法赤泥
沉降
堆存
bayer red mud
sedimentation
pile-up
