Global Slag News

India: Wonder Cement has ordered two vertical mills from Germany’s Gebr. Pfeiffer for its Nardana plant in Rajasthan. The order includes a MVR 6000 C-6 mill for grinding slag cement and a MPS 3070 BK mill for grinding fuel. Delivery is scheduled for early 2019 and mid-2019 respectively.

The MVR mill will feature a total drive power of 5820kW. Mixed cements will be be ground to a fineness of up to 5% R 45µm. The grinding plant will be designed to process granulated blast-furnace slag with a target fineness of approximately 4500 cm²/g Blaine and blast-furnace cements with different proportions of granulated blast-furnace slag, fly ash and gypsum and different product fineness degree. Wonder Cement has requested the option to grind relatively hot clinker in the mill while at the same time being able to reduce the cement temperature, and alternatively to use cold clinker from stockpiles.

The core components such as the tension system and the grinding rollers will come from Gebr. Pfeiffer in Germany. The grinding bowl and the gearboxes for the mill and classifier will also be delivered from Europe. Gebr. Pfeiffer’s subsidiary, Gebr. Pfeiffer India, will provide the housing parts, the foundation parts and supports of the rollers as well as almost the entire high-efficiency classifier type SLS 5600 BC. Gebr. Pfeiffer India scope of supply will incorporate most of the equipment to complete the grinding plant including the plant fan.

The MPS mill will grind petcoke with a capacity of 40t/hr to a product fineness of 2% R 90µm. It will come with a SLS BK classifier, allowing both coal and petcoke to be ground in the mill, dried with process gases and then classified in the integrated classifier. Due to the high abrasiveness of Indian coal, the mill will be designed with appropriate wear protection.

Most components of the coal mill will be supplied by Gebr. Pfeiffer India. The housing and foundation parts, the grinding bowl and a large part of the power-transmitting parts will be manufactured in India. Setting up the new MPS mill is planned to coincide with the commissioning of the entire kin line.

US: The Slag Cement Association (SCA) has presented its 2017 Project of the Year Awards at the American Concrete Institution (ACI) Convention in Salt Lake City in late March 2018. Each project was selected by the SCA’s Technical Marketing Committee because of its exemplary and innovative uses of slag cement in concrete mix design. Nine awards were presented in categories for architecture, durability, green design, performance, innovative application and sustainability. Member companies involved in the winning applications included Lehigh Hanson, LafargeHolcim, Votorantim St Marys Cement, Ash Grove Cement, Skyway Cement Company and Argos USA.

“The SCA’s awards program does a great job of showcasing how versatile slag cement can be, and how it can help create stronger, more durable and sustainable concrete structures,” said Ed Griffith, president of the SCA.

India: The Ministry of Steel has asked that the Ministry of Agriculture examine using slag from steel and iron production as a fertilizer. The government is particularly interested in using slag in areas with acidic soils, mostly in the eastern part of the country where productivity is lower, according to the Financial Express newspaper. 49M hectares of the country’s arable land has acidic soils from a total of 142M hectares total land that can be farmed.

Ireland: Eocem Ireland has introduced new corporate branding following growth in the Ecocem Group across Europe. The rebrand has been timed to tie in with group integration and new product launches. The ground granulated blast furnace slag (GGBS) producer has adopted a new logo with a company tagline – ‘Innovation Powering Sustainability’ – to accentuate the group’s innovation and environmental sustainability. Ecocem says that the rebrand of Ecocem Ireland, which is tied in with a rebrand across the group, is an indication of the revised focus of the group over the coming years.

“It is an exciting time for the Ecocem Group as there are many areas that we are working on with our innovation teams that will bring targeted solutions to customers across Ireland and the UK enabling them to benefit from using increased percentages of GGBS within their market offerings,” said Micheál McKittrick, the Managing Director for Ecocem Ireland.

Ecocem says it is Europe’s largest independent specialist producer of GGBS cement with a capacity of 2.4Mt/yr. Developments in the organisation have seen a growing interaction across its operating regions in Ireland, Holland, France, UK and Sweden, as well as the emergence of new products. Ecocem Ireland is a wholly-owned subsidiary of Ecocem Materials and it operates a slag grinding plant in Dublin Port.

India: The Rourkela Steel Plant has more than tripled the price it is receiving for blast furnace granulated slag since early 2017. Previously the steel plant was selling its slag to a local cement producer, according to the New Indian Express newspaper. However, since moving to using online auctions to sell the by-product the prices have risen. In early 2017 the Union Tribal Affairs Minister Jual Oram alleged that the price of slag was being fixed. However the steel plant countered that it lacked railway infrastructure.