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Leaching Behavior of Mercury from Spent Fluorescent Lamps Solidified with Cement 1. BOBIRIC, Constantin a, DUMITRESCU, Simona b, OLESCU, Aurora c and STNESCU, Rodica d. a Analytical Chemistry and Environmental Engineering, Politehnica University of Bucharest, Bucharest, Romania, email cbobirica
With the development of the cement manufacturing techniques, the cement production process used in China has changed significantly since 2000. The proportion of the precalciner process increased from 10 in 2000 to 91 in 2012 Hua et al., 2016, noting that the shaft process dominated before 2000. Compared with the traditional shaft kiln, the
In this study, the characteristics of mercury cycling in the cement production process were systematically investigated based on field tests in two Chinese cement plants. For the first time, an evaluation index was established to assess the mercury enrichment in the cement production process.
The U.S. Environmental Protection Agency has proposed to regulate emissions of air mercury from Portland cement kilns. Understanding the behavior of mercury within cement kilns will help operators of Portland cement kilns to devise methods for accurate measurement of mercury emissions and for reducing mercury emissions when regulations are imposed. A transient model for mercury behavior was
The challenges manufacturing plants face today. Continuous process manufacturing plants like cement, steel, aluminum, paper and pulp are built with large capital investments and run with significant operating expenses. Most of these processes are energyintensive, therefore energy cost can be a considerable share of the operating expense.
Mercury enters in the cement manufacturing process as a trace element with the raw materials and the fuels. The mercury content of natural raw materials varies between individual raw material deposits and even within the same deposit. In fuels, the amount of mercury can vary in a similar way, depending on the fuel type and the fuel source.
To produce cement, limestone and other claylike materials are heated in a kiln at 1400C and then ground to form a lumpy, solid substance called clinker clinker is then combined with gypsum to form cement. Cement manufacturing is highly energy and emissionsintensive because of the extreme heat required to produce it.
This essential handbook and ready reference offers a detailed overview of the existing and currently researched technologies available for the control of mercury in coalderived gas streams and that are viable for meeting the strict standards set by environmental protection agencies.
i KEYWORDS Cement, energy, emission, life cycle inventory ABSTRACT This report is an update of Life Cycle Inventory of Portland Cement Manufacture published in 2002. The purpose of this update is to incorporate the most recent energy use data from the
Inherent Mercury Controls Within The Portland Cement Kiln SystemModel of Mercury Behavior Within the Manufacturing System Understanding the behavior of mercury within cement kilns will help kiln operators devise ways to measure mercury emissions accurately and reduce mercury project has been divided into two activities with the objectives to 1 assemble and analyze mercury
Reducing waste, implementing efficiencypromoting practices, and continuously improving operations are the main goals of lean manufacturing ideology. These tasks may seem daunting for a manufacturer at the start of an improvement program, but there are many concrete steps that can be taken to shift the culture at any company.
Sources of mercury, behavior in cement process and abatement options Volker Hoenig European Cement Research Academy Cement Industry Sector Partnership on Mercury Partnership Launch Meeting Geneva, 1819 June 2013. 2 Behaviour of mercury in cement production process. Mercury cycle
Sikkema, Joel K., 34Fate and transport of mercury in portland cement manufacturing facilities34 2011. Fate and transport of mercury in portland cement manufacturing facilities by Joel Kenyon Sikkema A thesis submitted to the graduate faculty in partial fulfillment of the requirements for the degree of 22 Figure 2.9. Potential Mercury
Cement, in general, adhesive substances of all kinds, but, in a narrower sense, the binding materials used in building and civil engineering construction. Cements of this kind are finely ground powders that, when mixed with water, set to a hard mass. Setting and hardening result from hydration, which is a chemical combination of the cement
mercury emissions from cement manufacturing. Mercury is a toxic pollutant. It is reported Munthe, 2010 that cement industry could contribute approximately 10 of all anthropogenic mercury emissions. However, emissions are highly variable depending on the fuels and raw materials used to make cement. The industry has
A transient model for mercury behavior was developed and benchmarked with a comprehensive data set on the dynamic behavior of mercury in a Portland cement kiln reported by the German Research
Behavior and measurement of mercury in cement kilns. The complex precalciner cement manufacturing process results in a more complicated mercury behavior compared with other industries such as
4 In this document, the focus is directed on the clinker production process as it is the dominant source of mercury emissions to air. 2.2 The clinker production process
The production of cement is a major source of carbon dioxide, but new research suggests the material that makes up our concrete jungles also plays an important role in reabsorbing carbon emissions.
Methods for Estimating Air Emissions from Chemical Manufacturing Facilities August 2007 Final Prepared for Emission Inventory Improvement Program Prepared by Mitchell Scientific, Inc. Westfield, NJ RTI International Research Triangle Park, NC Volume II Chapter 16