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2 Journal of Achievements in Materials and Manufacturing Engineering

2 2006

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Wear phenomena of spinning rolls for stone wool production

Klimpel A., Dobrzański L. A., Lisiecki A., Janicki D.

Journal of Achievements in Materials and Manufacturing Engineering

2006

Vol. 17, nr 1-2

365--368

Purpose: Purpose of this paper: Results of the study of wear phenomena of cascade spinning rolls during stone wool production process are described. Design/methodology/approach: The study were based on direct process observations, chemical analysis and temperature measurements of basalt lava, metallographic examinations of the spinning rolls deposits. Findings: It was showed that the deposits of spinning rolls are worn in very different way, depending on the roll position in rolls cascade. Predominant wear phenomena are high temperature erosion, molten basalt lava (molten salt) corrosion, high temperature corrosion-oxidation, high temperature metal-ceramic abrasion wear, thermal fatigue of the working surface of spinning rolls. Research limitations/implications: The mechanisms of high temperature erosion demands further investigations and detailed studies. Practical implications: The wear resistance of basalt lava spinning rolls can be increased. Originality/value: The mechanisms of surface layer wear of basalt lava spinning rolls were determined.

Numerical simulation of wear of basalt lava spinning rolls

Klimpel A., Lisiecki A., Janicki D.

Journal of Achievements in Materials and Manufacturing Engineering

2006

Vol. 18, nr 1-2

391--394

Purpose: of this paper: Results of the study of wear phenomena of cascade spinning rolls during stone wool production process are described. Design/methodology/approach: The study was based on direct process observations, chemical analysis and temperature measurements of basalt lava, metallographic examinations of the spinning rolls deposits. It was showed that the deposits of spinning rolls are worn in very different way, depending on the roll position in rolls cascade. Findings: Predominant wear phenomena of the fully austenitic Grade 310 deposit of spinning roll no 1 is molten basalt lava corrosion-oxidation accompanied by low and high cycle thermal fatigue, high temperature basalt lava erosion at low velocity of basalt lava stream impinging the working surface at high angle. Predominant wear phenomena of the austenitic-ferritic Grade S32304 deposit of spinning roll no 2 is high temperature basalt lava erosion at very high velocity of lava stream impinging the working surface at high angle what is the cause of much faster wear of then spinning roll no 1. High temperature erosion wear is accompanied by molten basalt lava corrosion-oxidation and low and high cycle thermal fatigue processes. Predominant wear phenomena of the austenitic-ferritic Grade S32304 deposits spinning roll no 3 and roll no 4 is high temperature basalt lava abrasion as sprayed by rolls no 1 and no 2 fibers of solidifying basalt lava impinge the working surface of spinning rolls no 3 and no 4. Research limitations/implications: The mechanisms of high temperature erosion demands further investigations and detailed studies. Practical implications: The wear resistance of basalt lava spinning rolls can be increased. Originality/value: The mechanisms of surface layer wear of basalt lava spinning rolls were determined.