The testing of waste from the installation of salt debris leaching

Mineral Engineering Conference

Suponik, T.^1 ; Pierzyna, P.^1 ; Franke, D.^1 ; Adamczyk, Z.^1

Silesian University of Technology, Faculty of Mining and Geology, Akademicka 2, Gliwice

44-100, Poland^1

关键词: Chemical compositions;    Environmental aspects;    Impact on the environment;    Leaching methods;    Leaching plants;    Leaching test;    Mineral and chemical compositions;    Secondary Raw Materials;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/427/1/012040/pdf
DOI  :  10.1088/1757-899X/427/1/012040

来源: IOP

【 摘 要 】

Although the Salt Mine in Bochnia is designed for tourism, it still produces waste. In order to reduce the mass of waste and its harmful impact on the environment, the leaching method was proposed. The authors of the article have presented in their earlier works the method of leaching a salt debris as well as the large-scale laboratory installation used for leaching. The waste generated in the leaching installation are to be used e.g. for the production of building materials or, in the worst case, stored in landfill. The aim of the article was to assess the possibility of their storing at the landfill of inert waste or using them as a secondary raw material in the environmental aspects. The analysis of the mineral and chemical composition of salt debris and waste after leaching in the installation as well as the chemical composition of the leachate after the leaching tests of these waste were performed. Halite, anhydrite and gypsum are the dominant mineral in salt debris, whereas only anhydrite and gypsum in waste after leaching in a large-scale laboratory installation. The remaining, in smaller amounts, minerals are illite and quartz. Waste from the installation of salt debris leaching still releases small amounts of chlorides into the water. Therefore waste still poses a threat to the environment. In order to reduce the amount of chlorides released into the environment, the pump in the leaching plant should work longer than the assumed 5 minutes or the leaching temperature should be higher than 15°C.