The Markets of the SGL Group

The SGL Group has a wide product portfolio which extends from amorphous carbon to high-purity graphites, and from carbon fibers to composite materials and components. This BROAD BASE enables us to supply BEST SOLUTIONS to a large number of markets.

Aluminum and Non-Ferrous Metals

Our Applications

Primary aluminum is produced almost exclusively from the aluminum ore known as bauxite. The bauxite is first chemically digested and then calcined to form alumina (aluminum oxide). The alumina is then dissolved in a cryolite melt, from which the aluminum is precipitated electrolytically. This process takes place in an electrolytic cell (pot), in which the bottom is formed with cathode blocks that act as a negative electrode.

With cathode blocks, side blocks and ramming compounds, SGL Group offers key products for efficient, environmentally friendly aluminum production. As the sole independent cathode manufacturer, the company has a complete product range from amorphous through graphitic to graphitized cathodes. In addition, the company provides professional support in optimizing production processes. For the growing challenges of aluminum production, SGL Group is continually developing innovative solutions that will achieve longer cell life spans, increased productivity and optimized energy utilization.

Our Products

Hydrochloric acid (HCl) is a strong inorganic acid which is widely used in the chemical and other industries, e.g. for chlorination processes, production of vinyl chloride (plastics), TDI/MDI (polyurethanes), pickling of steel, pH control, neutralization, and regeneration of ion exchangers.

Our corrosion resistant systems and equipment solutions enable safe and efficient synthesis and processing of HCl gas and HCl acid. We have built more than 500 HCl synthesis units, among those the biggest synthesis units worldwide. Our innovative steam generation, two pressure distillation and extractive distillation systems are designed to maximize energy efficiency of HCl processing.

Hydrofluoric acid (HF) is the core component for fluorination reactions. It is the precursor for numerous pharmaceuticals and diverse materials such as polytetrafluoroethylene (PTFE). HF also plays a key role in the procuction of aluminium and uranium.

We offer a comprehensive range of corrosion resistant systems and equipment solutions for the processing of hydrofluoric acid. Examples are systems for the cracking of HCFCs to HF as well as SiC heat exchanger for steel pickling and chemical etching of glass.

Metallic silicon is an important material for the production of aluminum and numerous chemicals. High-purity silicon is also needed for the production of microchips and solar cells. Silicon is produced in arc furnaces from quartz and carbon. The furnace normally consists of a refractory-lined vessel covered with a retractable roof through which one or several electrodes are introduced into the furnace.

Carbon electrodes from SGL Group ensure a smooth, uninterrupted production process. The robust carbon material withstands the high temperatures and stresses in the furnace. In addition, the use of high-purity carbon prevents contamination by substances such as iron, aluminum, calcium, boron and phosphorus. Thanks to the segmented construction of the electrodes with screwed joints, spent segments can be replaced without interrupting silicon production.

Sulfuric acid (H2SO4) is a strong inorganic acid which is widely used in the chemical and other industries. Principal uses include lead-acid batteries, ore processing, fertilizer manufacturing, oil refining, waste water processing and chemical synthesis.

We offer a comprehensive range of corrosion resistant system and equipment solutions for the processing of sulfuric acid. Examples are systems for the dilution of concentrated acid and equipment for the reconcentration of diluted acid.