Displaying items by tag: Cemengal

There is lots to mull over for the cement industry from last week’s Global Slag Conference that took place in Prague.

One striking map from Michael Connolly, TMS International, showed the status of slag and steel products in the US. It was a multi-coloured patchwork of different regulatory statuses from approval to be used as a product to regulatory exclusion. This won’t come as a surprise to many readers but even within one country the way slag can be used legally varies.

As this column reported last year after the Euroslag Conference, the European Union can be presented in a similar way. The irony here is that increased use of slag and other secondary cementitious materials (SCM) is exactly the kind of change the cement and concrete industries need to make to decrease their carbon emissions. Constant quibbles over whether slag is a product or a waste undermine this. Happily then that Connolly was able to report progress in the US as lobbying by industry and the US National Slag Association have led to more states legally accepting slag as a product.

However, cement producers have other concerns in addition to environmental ones when it comes to slag usage as Doug Haynes from Smithers Apex explained. Haynes, a former UK steel industry worker turned consultant, spoke around a market report on the future of ferrous slag. His take on Basic Oxygen Furnace (BOF) slag was that despite fuel savings, decreased CO₂ emissions and the benefits of embodied iron when it is used as a raw material for clinker production, it is in the interests of cement producers for slag to be a waste because they then get it for free or at a reduced rate. It’s a similar story to the use of waste-derived fuels powering cement plant kilns where producers want lower fuel costs but waste collectors want value for their product. Unsurprisingly, Haynes wanted cement producers to accept the value embodied in BOF slag.

Charles Zeynel of ZAG International, an SCM trader, then laid out the situation where global SCM supplies are remaining static but cement demand is growing. Coal-fired power station closures are reducing supplies of fly ash, another SCM, placing pressure on existing granulated blast furnace slag (GBS) slag supplies. The message was very much in a slag trader’s favour but instructive nethertheless. If slag is in demand then the price will rise. Anecdotally, the increased number of cement producers at the conference seemed to indicate increased interest of the cement industry in the product.

Lots more speakers followed on topics such as slag beneficiation, grinding advances and new innovations. On grinding, one surprise that popped up was that Spain’s Cemengal has sold a Plug & Grind Vertical mill to CRH Tarmac’s cement plant at Dunbar in Scotland. It is the first such sale of this product in Europe. The last speaker, Jürgen Haunstetter of the German Aerospace Centre, stuck out particularly with his presentation on using slag as a thermal energy storage medium in a concentrated solar power (CSP) plant. This may not seem connected to the cement industry but it is along similar lines to Italcementi’s project at the Aït Baha cement plant in Morocco, which uses a CSP process that can be used with the plant’s waste heat recovery unit.

The Global Slag Conference will return in April 2019 in Aachen, Germany.

Read the full review of the 13th Global Slag Conference 2018

UK: Spain’s Cemengal is supplying a 0.5Mt/yr Plug & Grind Vertical mill to Tarmac’s Dunbar cement plant. Work started in April 2018 and the project is expected to be completed by July 2019. The unit follows the Plug & Grind product line’s modular format and it includes a FLSmidth OK Mill 37.3. The mill will be used to grind clinker at the cement plant although the subsidiary of CRH may also use the mill to grind slag. The order is Cemengal’s first Plug & Grind Vertical in Europe.

Honduras: Cementos Argos has ordered two Plug&Grind XL modular grinding units for a project in Honduras. Each mill has a production capacity of 220,000t/yr. The ball mills are 3.0 x 9.5m and they have a power of 1100kW. They also include 50,000m³/hr bag filters and classifiers. The scope of supply includes new cement storage silos for finished product, packing and dispatching equipment. The cement producer announced in early February 2018 that it was planning to spend US$20m on building a new cement grinding plant at Choloma.

A recent BBC television documentary explained the rise of low-cost airlines in the UK in the early 1990s. With news of an independent cement grinding plant in western France doing the rounds this week, we ask could the same revolution happen in the cement industry?

Back in the early 1990s following deregulation in the European aviation industry, smaller airlines took the opportunity to try a different model to the larger national carriers. Taking cost-cutting ideas from the US-based Southwest Airlines (deregulation had occurred earlier in the US) new companies like Ryanair and EasyJet burst into the short haul market, seizing market share and changing people's attitudes to air travel. For example, low to medium income males going on a 'British Gentlemen' stag (bachelor) party to a European destination such as Ayia Napa or Riga would have been unthinkable before the mid-1990s.

Flying passengers around Europe and producing cement are clearly radically different businesses. However, Kercim Cements' objective to produce 600,000t of cement and take a 10% share of the local market near Saint-Nazaire in Loire-Atlantique department of France stands out. With the European cement industry in decline and endless stories about cement exporting nations flooding developing markets, taking a grinding-led business model suddenly sounds considerably more competitive.

In addition, an independent company importing clinker from non-EU countries might also benefit from not being subject to quota allocations of CO₂. This issue was raised from a different angle earlier in 2013, when Irish company Ecocem complained about large cement producers making profits from the EU Emissions Trading Scheme (ETS) despite reduced production.

Thinking around grinding as the model for an industry step-change, one of the presenters at the Global CemTrader conference in May 2013 was Moisés Nunez of Cemengal. He spoke about 'Plug&Grind', his company's low-cost modular grinding plant technology. Essentially, the Spanish company can fit a grinding station into 15 shipping containers and assemble the grinding unit wherever the client can transport it to. Once again, this sounds perfect for a global cement industry that is making too much clinker.

As this column has reported previously, Africa is the ideal target for a low-cost grinding-led business model given its overall high level of demand for cement. Any cement business near the coast has been under intense competition from imports. So much so, that former PPC (Portland Pretoria Cement) head Paul Stuiver stated that any African facility built within 200km of a port was at risk. Could French and other EU-based coastal cement plants also be at risk? With the cost of production and transport on the rise, the low-cost grinding model may even work in Europe. The beauty of the Cemengal system is that it is mobile so that it can follow market opportunity.

As the Economist recently pointed out in a review of the global cement industry, it is an industry dominated by a small number of companies. High cost of entry, high transport costs by road and other factors mean that this is unlikely to change anytime soon. Yet, exports by sea provide some level of increased competition. Both of the grinding projects mentioned above rely on this fact. Let's wait and see what happens.