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France: Hoffmann Green Cement Technologies has commissioned its H2 plant, a 1000t/day clinker-free cement plant, adjacent to its existing H1 clinker-free cement plant in Bournezeau, Pays de la Loire. L'Usine Nouvelle News has reported that the new plant took 24 months to build and cost Euro22m. The main part of the plant consists of a 70m tower, where activated clay, ground granulated blast furnace slag (GGBFS) and gypsum are mixed to produce the cement. It is installed with solar panels capable of supplying 50% of its energy consumption. The producer says that its clinker-free cement has over 90% lower CO2 emissions than cement produced with ordinary Portland cement (OPC). It aims to sell 24,000t of the product throughout 2023.
USGS estimates US slag production at 15Mt in 2017
01 February 2019US: The United State Geological Survey (USGS) estimates that 15Mt of ferrous slag was produced in 2017. Blast furnace slag accounted for about 50% of the sales volume. About 85% of this value was from sales of granulated slag. Steel slag accounted for almost all of the remainder. 2.2Mt of slag was imported. Slag was processed by about 25 companies servicing active iron and steel facilities or reprocessing old slag piles at about 175 processing plants in 30 states.
The USGS reported that the supply of blast furnace slag continued to be ‘problematic’ in the US due to the closure of blast furnaces and depleted slag piles. Supply of basic oxygen furnace (BOF) steel slag was similarly affected due to plant closures. However, ground granulated blast furnace slag (GGBFS) sales volumes have failed to match increases set by the overall US cement industry since 2010 despite positive long term trends.