Water slag is the product of placing blast furnace slag in hot molten state in water for rapid cooling, also known as blast furnace water quenching slag, is a by-product produced by blast furnace ironmaking, and is also known as mineral powder in the cement industry, and is mainly used in two ways: water quenching in slag ponds or water quenching in front of furnaces. Water slag is mainly used in the production of cement, which can be used as cement mix or made into clinker-free cement. Blast furnace water slag can be used as the main raw material for the production of slag micropowder after superfine grinding. It can be used as thermal insulation filler instead of silica bath soil, saving cost. It can be used to produce slag bricks and wet-milled slag concrete products. It is used as heat insulation filler.

The main use and technical requirements of water slag micropowder

At present, the domestic iron and steel mills are large-scale production, blast furnace ironmaking process will produce a large amount of wastewater, waste slag, to achieve the comprehensive use of blast furnace water slag has become the focus of industry research, this paper on the water slag micronutrient powder treatment technology is introduced.

Water slag micropowder technology requirements

Blast furnace water slag can be divided into alkaline, neutral and acidic three kinds, to water slag in the alkaline oxides and acidic oxides content of the ratio of the size of M to distinguish: when M> 1, water slag is alkaline; when M = 1, water slag is neutral; when M < 1, water slag is acidic. The gelling property of alkaline slag is better than that of acidic slag, so it is better to use alkaline slag for the production of water slag micropowder, and the larger the M value of water slag micropowder is, the higher its activity is.

The main use of slag

Slag bricks are bricks made by adding a certain amount of cement and other cementitious materials with water slag, after mixing, moulding and steam maintenance. Wet-milled slag concrete is made by placing water slag and exciters (cement, lime and gypsum) on a wheel mill with water to make a mortar and then mixing it with coarse aggregate. Used as heat-insulating filler. It can be used as insulation filler instead of silica bath soil, saving cost. Production of slag micro powder. Blast furnace water slag can be used as the main raw material for producing slag powder after superfine grinding. At present, some of the blast furnace water slag fine grinding as a flue gas absorber to deal with SO2.