Chernye Metally

The Russian section of this issue includes two articles. Yu. S. Yusfin, V. V. Korovushkin, V. V. Tikhomirovet al. examined in their work usage of beneficiation slimes of goethite-hydrogoethite ores as binding agents in pellet production. Executed calculation of blast furnace practice parameters with partial usage of pellets in charge materials with addition of 5 % slime and 0.5 % bentonite as binding agents has displayed that blast furnace parameters have not changed actually and saving of expensive bentonite is possible.

G. N. Kolpakov, N. A. Kolpakova, V. A. Kuzov and V. I. Khvostov. showed in their paper possibility of cleaning of stainless steel scrap with removal of X-ray impurities via electrolytic method. It was established that tubes of "cold line" of reactor cooling system are washed with removal of X-ray depositions during one electrolytic cycle in cathode treatment with described operating parameters (solution concentration, treatment duration, current density).

Tracking of a flat belt entry looper within a continuous pickling line of voestalpine Stahl GmbH was examined by M. Egger, A. C. Kirchebner and T. Huber. With the aim of optimizing trackingsystems, the lateral movement of the steel strip through the continuous pickling linewas analysed and two different steering strategies were investigated.

M. Haverkamp and M. Sauerland observed wall thickness laser measuring as basis for quality assurance in seamless tube production. In order to minimise this loss, the deviation between nominal and actual wall thickness must be measured and corrected as early as possible in the production process. There are a number of possible methods for measuring the thickness.The latest development in this field, Lasus Multi-Scan, is based on the laser-excited and laser-detected ultrasonic measuring principle that offers a number of technical benefits for the wall thickness measurement and forms an ideal basis for a quality assurance system (QAS).

The large survey "Analytical chemistry in the steel industry" was prepared by D. Sommer, J. Flock, E. Thiemann and B.-J. Schlothmann. Analytical chemistry in the steel industry is closely associated with the cooperative activities of colleagues in the Chemists Committee of the Steel Institute VDEh.

J. Wilden, S. Jagn, N. Milahin et al. analyzed in their article prospects and visions for joining modern steels as hybrid constructions. The increasing diversity of modern,innovative materials and their continuously increasing strength also lead to more stringent requirements on thejoining processes. An economic and energy-efficient solution for these technological challenges can be realized byusing innovative brazing processes in combination with new filler materials.

Environmental problems are discussed in the article "Ecological restoration is additional load on iron and steel industry first of all" by H.-J. Kerkhoff.

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