Studies on Conversion of Anhydrous Gypsum to Crystal Gypsum (I)

Study on Preparation of High-strength Gypsum by FGD Gypsum

With the enlarging of industrial desulfurization, the amount of FGD gypsum is increasing rapidly. The preparation of alpha-calcium sulfate hemihydrate (α-HH) is one of the biggest concerns for FGD gypsum reclamation. The influence of mixed chlorate solution of Mg-Ca-Na concentrations (5-30 wt%) and FGD gypsum concentrations(5-30 wt%) by hydrothermal salt solution method at atmospheric were inve...

Carbonate and Gypsum

Inorganic carbonate in soil occurs predominantly as the sparingly soluble alkaline-earth carbonates, calcite (CaCOs) and dolomite (CaMg(CO,),). Calcite is usually the dominant form in active pedogenic environments (Doner & Lynn, 1977; Nelson, 1982). There are only a few reported occurrences of aragonite (CaCOs) and vaterite (CaCOs) in soils. Sodium carbonate and magnesium carbonate and hydroxyc...

Scanning force microscope induced growth and dissolution on single crystal gypsum (CaHSO4.2H2O)

Recovery of Sulphur from Waste Gypsum

s of the International Mine Water Conference 19 – 23 October 2009 Proceedings ISBN Number: 978-0-9802623-5-3 Pretoria, South Africa Produced by: Document Transformation Technologies cc Conference organised by: Cilla Taylor Conferences RECOVERY OF SULPHUR FROM WASTE GYPSUM N.R. MBHELE, W. VAN DER MERWE, J.P. MAREE and D. THERON Exxaro Resources, P.O Box 9229, Pretoria, 0001, South Africa; E-mail...

Basic Properties of Flue-Gas Desulfurization Gypsum

Základné vlastnosti sadrovca pre odsírenie spalín Several hundred thousand of FGD gypsum is produced annually at the Matra Power Plant (Hungary) as a byproduct of generating electricity and protecting the environment. Chemical and mechanical characteristics of this material were studied of the Department of Mining and Geotechnical Engineering, University of Miskolc (Hungary). The material in qu...