The role of blast furnace slag in cement

The Role of Blast Furnace Slag in Cement After being ground in a vertical slag mill, blast furnace slag is used as an admixture. So what is the latest role of blast furnace slag in cement? Liming Heavy Industry, a vertical slag mill manufacturer, shares the latest information on the role of blast furnace slag in cement for reference only.

I. The Role of Blast Furnace Slag in Cement:

To address the issue of blast furnace slag utilization, one method is to incorporate treated blast furnace slag into cement production, replacing a portion of the cement to create blast furnace slag-cement composite cementitious materials. Another method is to use blast furnace slag as crushed stone in the concrete production process, but this approach is not ideal. Research shows that blast furnace slag-cement composite cementitious materials have almost identical performance to cement, exhibiting many superior properties. This method not only solves the problem of blast furnace slag utilization but also reduces environmental pollution caused by blast furnace slag accumulation and cement production. Therefore, research on blast furnace slag-cement composite cementitious materials has become one of the hot topics in cement research both domestically and internationally.

II. How to Improve the Utilization Effect of Blast Furnace Slag in Cement:

The amount of slag added significantly affects the strength of the final slurry. Researching the slag addition can maximize its utilization and produce the best-performing slag-cement composite cementitious material. Different slag additions correspond to different properties of the slag-cement composite cementitious material. A small amount of blast furnace slag (GGBS) in cement slightly increases the compressive and flexural strength of the material. As the slag content increases in cement production, its compressive strength decreases slightly in the early stages. When slag accounts for 70%–80% of slag cement, the later flexural strength is basically similar to that of polycarbonate (PC).

III. What processing machinery and equipment are needed to establish a processing project utilizing blast furnace slag in cement?

Blast furnace slag needs to be ground into fine powder before it can be used as a cement admixture. Liming Heavy Industry's vertical grinding mill has high grinding efficiency and low energy consumption, consuming 40%-50% less energy than a ball mill; its large single-machine production capacity reduces the overall investment cost of blast furnace slag processing. For inquiries about the specific processes for utilizing blast furnace slag in cement, as well as project investment budgets, please feel free to contact us.