Quantification of the Reduced Environmental Impacts with Use of Co-Processing in Cement Kilns in India

Tiwary, Ankur; Sharma, Garima; Gupta, Priyanka

doi:10.9790/2402-08312030

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…Co-processing is the use of waste as raw material, or as a source of energy, or both to replace natural mineral resources and fossil fuels (Ziegler et al, 2007). Industrial experience has shown that the use of wastes as AFRs by cement plants is both ecologically and economically justified (Chatziaras et al, 2014;Kara et al, 2009;Tiwary et al, 2014). Alkaline environment, high temperature, and long residence time allow a rotary kiln to burn a wide range of waste and hazardous material (Rahman et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Blast furnace flue dust co-processing in cement kiln – A pilot study

Baidya

Ghosh

Parlikar³

2018

Waste Manag Res

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An integrated steel plant generates a large amount of blast furnace flue dust – about 18–22 kg/t of hot metal – as a by-product of the production process. The major component of this flue dust is iron oxides and coke fines. The recovery and reuse of this iron and coke is very important with increasing price of conventional resources. Cement plants on the other hand are looking for alternative fuel and raw materials as a substitution to the traditional fuel and raw materials, thus co-processing of the flue dust is a solution for both the industries. The study gauges the potential of flue dust utilization in a cement plant in India, using an experimental trial of one month and also analyses the techno-economic feasibility of the co-processing route. Since flue dust contains iron which is a limiting constituent in the limestone deposit of this plant, feasibility of reducing the iron content in the flue dust was evaluated through the magnetic separation route. The objective was to utilize maximum quantum of flue dust with acceptable iron content and high energy content. It was observed that the magnetic separation does not effectively segregate the iron present in the flue dust and neither increases the energy content. The cost analysis of the usage of flue dust also revealed that flue dust can be used effectively by the cement industry if its cost ranges in an acceptable range of USD 35–39 (approximately).

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Section: Introductionmentioning

confidence: 99%

Blast furnace flue dust co-processing in cement kiln – A pilot study

Baidya

Ghosh

Parlikar³

2018

Waste Manag Res

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Feasibility Analysis on Industrial Symbiosis Between Cement Industry and Tea Industry

Yadav¹,

Kalaiyarasi²

2015

Int. J. Environ.

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The project aims at analyzing the feasibility of utilizing cement kiln dust (CKD) in treating wastewater from tea industry with the concept of industrial symbiosis. CKD is the dust collected at the air pollution control device(s) associated with a kiln system from cement industry. A very less percent of CKD is recycled and the rest is land filled /stockpiled; disrupts groundwater through leaching of minerals. Cement Kiln Dust (CKD), rich in CaO, SiO 2 , behaves as a neutralizing as well as stabilizing agent for tea effluent treatment. The ability of CKD to reduce the BOD, COD, TSS, and phosphates in tea effluent was analyzed and the optimum dosage is determined. The effect of different dosages of Cement Kiln Dust ranging from (1-3) gm/l has been discussed on the bench scale tests. The results show that, for different CKD concentrations, high removal efficiencies of 94.4 and 99.0, 58.9 for BOD, TSS, phosphates and a lower efficiency for COD with 9.09 are achieved for 2.5gm/l. The persistent presence of color providing proteins theaflavins (TF) and thearubigins (TR) from the leftover tea leaves in the effluent imparts the low removal efficiencies of COD. However, the COD value is within the dischargeable limits (CPCB standards). Moreover, a considerable removal efficiency and high SVI of 0.181 makes CKD a feasible coagulant in treating tea effluent with optimum dosage of 2.5g/l. The objective of developing industrial symbiosis network was thus achieved using the CKD to treat wastewater from tea industries.

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Quantification of the Reduced Environmental Impacts with Use of Co-Processing in Cement Kilns in India

Cited by 2 publications

References 5 publications

Blast furnace flue dust co-processing in cement kiln – A pilot study

Blast furnace flue dust co-processing in cement kiln – A pilot study

Feasibility Analysis on Industrial Symbiosis Between Cement Industry and Tea Industry

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