Lots of facts stuck out from the inaugural Global GypSupply Conference that took place in Brussels last week. One was that Spain exported 1.49Mt of raw gypsum to West Africa in 2016. The data point from Spanish customs popped up in a presentation by Mohamed El Moustapha, the managing director of a gypsum mining company based in Mauritania. He was using the figures to reinforce the opportunities for his company to supply the growing cement industry in West Africa. Yet the size of the market has implications for the oft-repeated claims of cement sector self-sufficiency that various countries in the region have cried out for.
Gypsum is used as a retarding agent to control the setting time of cement. It gets added whilst clinker is ground into cement. Roughly speaking, cement production requires about 5% of gypsum. So a 1Mt/yr cement plant would require around 50,000t/yr of gypsum. The crucial question for cement producers in West Africa is where is this gypsum coming from. Given that the Global Cement Directory 2018 places cement production capacity at just under 100Mt/yr in the region, this requires around just under 5Mt/yr of gypsum.
El Moustapha made out that there were no gypsum deposits in West Africa. This contradicts a study on Nigerian gypsum mining published in Global Gypsum Magazine in March 2016 estimated local reserves to be around 150Mt although to be fair to El Moustapha these appear to be relatively underused. This also doesn’t take into account sources of synthetic gypsum produced at coal-power plants although this is likely to be negligible at present.
Reserves in Mauritania appear to be much larger at 1.7Bnt. Instead, the problem here appears to be assisting the exploitation of mined gypsum by improving infrastructure and supply chain issues. El Moustapha’s company Samia reported that it exported 170,00t of gypsum to cement plants in West Africa, mainly via ship, but with a significant minority via truck overland to Mali. Another speaker at the conference from the Moroccan gypsum trader Cultura presented a snapshot of a more mature market with exports of 210,000t in 2017. However, similar issues with port infrastructure were also present. To this end the company was keenly looking forward to an upgrade project the Port of Safi due for commissioning in 2020 – 2022 that would allow larger ships to berth.
A market report on the gypsum and anhydrite market by Roskill in 2014 placed Egypt, Algeria and South Africa as Africa’s leading gypsum producers. In particular it singled out South Africa as the only sub-Saharan country producing more than 100,000t/yr of gypsum. In terms of usage of gypsum Roskill estimated that just over half of the world’s gypsum was used to make cement, followed by 38% for wallboard and plaster production and then 18% for agricultural usage. Although this compares to just over a quarter for cement production and most of the rest for wallboard production in the US, with its more developed wallboard market than the rest of the world, according to recent United States Geological Survey (USGS) data.
As the Global GypSupply Conference demonstrated plenty of raw gypsum is available around the world. However, since supply and price can vary considerably in the short term, cement producers are keen to secure steady sources. Developing gypsum sources in northern Africa are necessary to help build the West African cement industry, but the regions need to work together.
The 2nd Global GypSupply Conference will take place in spring 2020
