Magnesia features

  • April 1999

    Talking Turkey - An update on the Turkish minerals industry

    01 April 1999

    As the Turkish democratic republic celebrates its 75th Anniversary, IM looks at the progress made in the mineral industry thanks to the private sector and the government s programme for privatisation and liberalisation of the industry.

  • Optimised dry ball mill grinding

    01 April 1999

    Results obtained on an industrial scale indicate that the application of a SINTEF air classifier and optimisation of the associated grinding circuit can provide as much as a 100% production increase for many industrial minerals producers. To grind feldspar to the fineness of 75 top size, the energy requirement before modifications was 57 kWh/t. The modified industrial ball mill circuit required 29.5 kWh/t specific energy. Results obtained from a plant grinding feldspar in a high compression roll mill to the same fineness indicated 33 kWh/t specific energy 12 % more energy then the ball mill.

  • The final frontier - Kaolin processing liquidity

    01 April 1999

    Many elements of the wet processing of kaolin have evolved steadily over the years to a point at which they are now widely accepted as best available technology. Of course, individual companies continue to innovate to stay ahead of the competition, either in terms of processing costs or product quality, but quantum leaps in technology are rare. This paper discusses one such quantum leap that its proponents believe has the potential to revolutionise the production of water washed kaolins.

  • Ceramic casting - challenges for US ball clays

    01 April 1999

  • Sillimanite minerals - Refractory market slump takes its toll

    01 April 1999

    It s a small, tough old world in the sillimanite minerals market. Recent years have witnessed an increase in andalusite production capacity with upgraded and reopened operations. However, with a severe downturn in the refractories markets there is currently a significant overcapacity  Moreover, it is possible that the supply market ay experience further consolidation in the near future. IM reviews the market and looks at the main players.

  • Dry cargo freight - Market forces & future outlook

    01 April 1999

    Presenting an overview of the dry cargo freight market is not an easy task since the shipping market is indeed a complicated one. However, this article, adapted from a paper presented at the IM13 Congress, Kuala Lumpur, April 1998 examines just what makes the shipping market tick by taking a look at the economics of shipping, firstly on a macro scale, looking at the overall supply (the fleet) and global demand, and then on a micro scale by looking at the components of both demand and supply.