Original scientific paper

Experimental study on solidification/stabilization of Cr in stainless steel pickling sludge by high temperature roasting process

W. Deng ; University of Science and Technology Beijing, School of Metallurgical and Ecological Engineering, China
Z. Tian ; University of Science and Technology Beijing, School of Metallurgical and Ecological Engineering, China
D. Cang ; University of Science and Technology Beijing, School of Metallurgical and Ecological Engineering, China

Abstract

For stainless steel pickling sludge (SSPS) produced in a stainless steel factory in southeast China, Fly ash (FA) and waste glass (WG) were used as solidification/stabilization (S/S) agents to conduct high-temperature roasting experiments on S/S of Cr in SSPS, respectively. The effects of roasting temperature and S/S agent dosage on the S/S of Cr were studied. The results show that both FA and WG can take positive way to S/S. By adding 25 % of FA to SSPS at roasting temperature of 1 500 °C, the Cr leaching concentration of S/S products can decrease to 0,63 ppm. As for WG as S/S agent, the Cr leaching concentration of the product can be reduced to 0,45ppm when the dosage is 20 % and the roasting temperature is 1 400 °C,. Considering the dosage and roasting temperature, WG is suggested as a better S/S agent.

Keywords

stainless steel Cr, solidification, pickling sludge, temperature, roasting

Hrčak ID:

290059

URI

https://hrcak.srce.hr/290059

Publication date:

3.4.2023.

Visits: 662 *