How does China handle blast furnace slag?

Blast furnace slag can be processed into the following materials using various processes. In China, blast furnace slag is usually processed into water slag, slag crushed stone, expanded slag, and slag beads. Water slag is the process of rapidly cooling hot melt blast furnace slag in water, mainly through two methods: slag pool water quenching or pre furnace water quenching. Water slag is used as a building material in the production of cement and concrete. Due to its potential hydraulic cementitious properties, it can be used as a high-quality cement raw material under the action of cement clinker, lime, gypsum and other activators. It can be made into slag silicate cement, gypsum slag cement, lime slag cement, slag bricks, slag concrete, etc. Slag crushed stone is a type of crushed stone material obtained by natural cooling or water spraying cooling of blast furnace slag in a designated slag pit or slag yard to form a relatively dense slag, which is then excavated, crushed, magnetically separated, and screened. The production process mainly includes two methods: hot splashing method and embankment method.