acid-insoluble lignin

By the investigation and statistical analysis,it is found that acid-insoluble aluminium in steel is in the range of 0001%-0010%For carbon steel of aluminium content at 020%-050%,the subtraction of 005% from the content of total aluminium is defined as the content of acid-soluble aluminiumThe method is applied for guiding production of steel-smelting with satisfactory results

经过调查并统计发现,钢中酸不溶铝的质量分数在0 001%～0 010%之间。

According to Portland-type cement hydration characteristics, experiments of chemically bound water, paste conductance, conductance and pH of water-cement suspension, hydration heat, insoluble residua of cement, particle size distribution of cement, DTA as well as experimental conditions are designed.

本文根据硅酸盐类水泥的水化特点，设计了化学结合水量、水泥净浆电导、水泥悬浮液电导率与pH值、水化热、水泥酸不溶物、水泥粉体颗粒尺寸分布、DTA等实验项目和实验条件，对70多种硅酸盐类水泥样品及其水化样进行了诸多项目的测试和水化特性的分析研究。