| IRON & STEEL Steel production requires vast quantities of lime to form slag in order to prevent the steel from being oxidized. The melted slag also removes the impurities from the steel that are harmful to the process and products. Dolomite is also needed to protect the refractory lining of the steel furnace or converter, increasing the life span – a crucial parameter from a financial viewpoint. SMA Mineral can supply both types of high quality alkaline flux, for every type of steel manufacturer, including carbon steel producers and those that manufacture stainless steel. Depending on the customer’s handling system, both types of flux can be delivered in many ways; as lumps in an open truck, or as pebbles and powder in a pressurized tank truck. The flux can also be delivered in Big Bags. Both types of products are also available premixed, if desired. |
Lime burnt in either a shaft kiln or rotary kiln could be used for LB furnace, converter, and ladle, as long as it is possible to meet the customer’s requirements. For example, when manufacturing stainless steel, most customers want lime with an extremely low residual C content, while other customers need a somewhat higher content. |
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 PULP & CELLULOSE The sulfate process consumes vast quantities of lime. Extremely high demands are placed on the burnt lime used in the process: NPE* purity, degree of calcination, and function in the causticizing process are just a few of them. When the kraft pulp mill recovery cycle is interrupted because the lime mud kiln breaks down, vast quantities of lime mud are precipitated. The lime mud is usually sent to the landfill as waste, resulting over time in major storage problems. By applying the Sandarne concept, the lime mud from the breakdown is converted from landfill waste into a new raw material: a high-quality burnt lime, ready to be used again. |
Through SMA Mineral's considerable storage capacity and efficient transports, which are handled by its logistics department, the foundation is laid for rapid, reliable deliveries directly to and from the kraft pulp mills. Down time becomes less of a problem, and both the mill’s finances and the environment are spared. The lime mud resulting from the breakdown is transported from the landfills to Sandarne’s lime mud kiln, where it is burnt. The burnt lime mud is then delivered back to the kraft pulp mills as lime** or as “make-up lime”, after mixing in burnt lime of high purity. Lime mud and different qualities of burnt lime, both domestic and imported, are mixed in the mixing station according to formulas that have been shown to be appropriate for each use through experimenting and research. * Non Process Elements (NPEs Compounds that contain Si, Al, Mn, and Mg cause problems in the process and are mainly introduced with the wood raw material, though even with input goods and chemicals such as lime. ** Replacement lime at lime mud reburning breakdown. |
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| < IRON & STEEL < PULP & CELLULOSE |
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SMA_Steel_GB.pdf (700 kb) |
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SMA_Pulp_GB.pdf (730 kb) |
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MSDS - Burned Dolomite.pdf (130 kb) |
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MSDS - Burnt lime.pdf (140 kb) |
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MSDS - Slaked lime.pdf (140 kb) |