Global Slag News

Canada/US: Harsco’s Environmental division has invested US$2.3m in Carbicrete, a Canadian technology company developing concrete products made with steel slag for the construction industry. The investment will give Harsco Environmental a Board seat in Carbicrete and has been made in conjunction with a US$1.6m grant from the Government of Canada’s Sustainability Development Technology Canada Foundation and applications to further government grant programs. Harsco’s investment will aid the development of the technology through a demonstration program with support from a commercial concrete block manufacturer as part of a development consortium.

“This investment in innovation is aligned with Harsco’s on-going expansion into environmentally-focused products and services, and we are proud to support the development of this exciting technology,” said Harsco Environmental chief operating officer Russ Mitchell.

Carbicrete is developing a technology that allows the production of concrete without using cement by using steel slag instead. The concrete mix is poured into molds, like conventional concrete, and is then cured using CO₂. During curing, the gas becomes a solid, binding together the slag granules, and giving the concrete its strength. Carbicrete says the process can be implemented in any precast concrete manufacturing plant. It also says that the technology is ‘carbon negative’ because more CO₂ is consumed than emitted during the process.

India: JSW Cement has revised its planned expansion to its 14Mt/yr total installed capacity to 39Mt/yr before 1 January 2023, an increase of 5Mt/yr compared to its initial target of 34Mt/yr by 2020. The figure includes JSW’s 54% subsidiary Shiva Cement’s new 1Mt/yr integrated and 1Mt/yr grinding plant, valued at a total of US$112m. Parth Jindal, JSW Cement managing director, said that the figure had been revised upward because Shiva Cement had become self-sufficient in clinker production, freeing the group’s east Indian cement production from ‘volatile import costs.’

Economic Times has reported that Shiva Cement is set to bring its limestone reserves to 100Mt with the acquisition of the Khatkurbahal mine. The company sources its granulated blast furnace slag from the Odisha steel industry. Production of JSW Cement’s flagship product, JSW Portland Slag Cement (PSC), releases CO2 at a rate of 325kg/Mt compared to between 760kg/Mt and 800kg/Mt for typical Ordinary Portland Cement (OPC).

Brazil: Itaci Cement has purchased 100ha of land in Tabuleiro do Norte in the north-eastern Brazilian state of Ceará. Diario do Nordeste has reported that the company has invested US$66m in a development, though whether this will take the form of a clinker grinding or integrated cement plant has not been disclosed.
Companhia Siderúrgica do Pecém (CSP) will reportedly supply granulated blast furnace slag to the facility when operational for use as a feedstock.

Sweden: Construction and engineering conglomerate Peab’s subsidiary Swecem has engaged German-based Gebr. Pfeiffer for the supply of one MVR 2500 C-4 grinding mill at its granulated blast furnace slag (GBFS) grinding plant in Oxelösund in Södermanland. The mill has four grinding rollers and a table diameter of 2.5m, giving it a 25t/hr slag grinding capacity.

Swecem operates a concrete plant in Kungsängen. It currently uses ground granulated blast furnace slag (GGBFS) supplied by Irish-based Ecocem’s 0.7Mt/yr Dunkirk grinding plant in France.

Russia: NMLK’s slag output is set to increase after the installation of a sixth furnace at its flagship plant in Lipetsk Oblast at a cost of US$0.55bn, increasing its pig iron production capacity by 8% to 3.4Mt/yr.

NMLK supplies Eurocement with 5Mt/yr of raw materials as primary feedstock and additives, and has in turn received the latter’s cement for its own construction projects.