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以中南地区几种主要地带性土壤为材料，探讨了高梯度磁场（ＨＧＭＳ）分离土壤氧化铁的技术。结果表明：土壤胶体经ＨＧＭＳ处理，氧化铁的浓缩倍数与提取率呈负相关。以２％的ＮａＯＨ溶液为分散剂，在较低磁场强度下（０．９Ｔ），以４００ｍｌ／ｍｉｎ的流速将胶体悬液通过双面塑料载丝盒，氧化铁的浓缩倍数较大；以２％Ｎａ２ＣＯ３溶液为分散剂，或以２％ＮａＯＨ溶液为分散剂，在较强的磁场强度下（１．２Ｔ），以１００ｍｌ／ｍｉｎ流速将胶体悬液通过双面铁片载丝盒，磁性部分的提取率较大。氧化铁含量低的土壤胶体，用ＨＧＭＳ处理，其浓缩倍数更高
Based on the analysis of several major zonal soils in central and southern China, this paper discussed the technology of separating iron oxide from soil with high gradient magnetic field (HGMS). The results showed that the concentration of iron oxide was negatively correlated with the extraction rate when soil colloids were treated with HGMS. With 2% NaOH solution as dispersant, the colloidal suspension was passed through a double-sided plastic cartridge at a low magnetic field strength (0.9T) at a flow rate of 400ml / min, and the concentration ratio of iron oxide was large. % Na2CO3 solution as a dispersant, or 2% NaOH solution as a dispersant at a strong magnetic field strength (1.2T), the colloidal suspension at 100ml / min flow rate through the double-sided iron wire carrier, the magnetic part The extraction rate is larger. Soil colloids with low iron oxide content were treated with HGMS with higher concentration ratios