Limestone Waste - an Effort towards Protection of the Environment
As a result of the main processes of the limestone treatment sawing,buffing and polishing,a technological waste is usually obtained.These final tailings consist of a water suspension with highly variable solid phase content and granulometric composition,Since the waste is conducted to a tailing pool or another place,this leads to environment pollution.In this work the slurry waste generated during the limestone processing in a Bulgarian limestone manufacturing company was characterized.The chemical composition,particle size distribution,solid phase content,whiteness,yellowness,abrasion,specific surface and density were determined.The possibility of obtaining building/eonstruction materials from limestone processing waste was studied in a laboratory scale.The technological tests included thickening,filtration and drying of waste products.Continuous operation laboratory thickener was used.Coagulant Accepta(R) 8302 (aluminum sulphate solution) and anionic flocculant Magnafloc(R) 155 were found to be the most effective in the sedimentation of the products.Filtration tests were performed using a laboratory pressure filter.Drying tests were carried out in laboratory facilities using the direct heating method.On the basis of the laboratory results a technology for limestone treatment waste was developed.A production line for building materials from limestone slurry was set up.As a result the manufacturing company has a possibility to use circulating water.
Limestone Processing waste Dewatering Circulating water
I.L.GRIGOROVA I.M.NISHKOV
Department of Mineral Processing and Recycling,University of Mining and Geology St.Ivan Rilski,Sofia,Bulgaria
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
3653-3656
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）