A Study on the utilization of waste cement - bonded wood particle board as a raw material and a secondary fuel in cement manufacturing

Download

index.pdf

Date

2012

Author

Yılmaz, Mustafa

Metadata

Show full item record

Item Usage Stats

240
views

112
downloads

A considerable amount of waste is obtained as a result of edge-cutting operations during cement-bonded wood particle board (CBWPB) manufacturing. This waste material which basically contains wood chips and hydrated cement has to be disposed of and does not have any economical value. However, it can be burned in cement rotary kilns and may result in energy savings to a certain extent due to the presence of wood particles as a secondary fuel and since the hydrated cement may be decomposed and then reform clinker compounds during the calcination process. In this experimental study, the possibility of using waste CBWPB in cement manufacturing and its effects on energy consumption and cement characteristics will be investigated. The reference mix, corrective limestone, CBWPB waste and coal, were used as raw materials to prepare six different raw meals whose chemical compositions was similar to reference mix. All six raw mixes (including the reference) were calcined under the same conditions to produce clinkers. The compositions and micro structure of the clinkers obtained were comparatively analyzed by wet analysis, XRF and XRD techniques. Cements were obtained by intergrinding the clinkers with 5% (by mass) gypsum rock and standard tests were carried out on each of the cements. In addition to these, since CBWPB waste contains wood about 30% by weight, its contribution to fuel consumption during clinker production was also analyzed. The test results revealed that CBWPB waste can be used as a cement raw material since CBWPB waste has the similar chemical composition with the reference raw mix. CBWPB, which contains about 30% (by mass) wood, contributes to the heating process during calcination and results in lower amount of primary fuel requirement.

Subject Keywords

Cement clinkers., Cement composites., Wood waste., Wood waste

URI

http://etd.lib.metu.edu.tr/upload/12614695/index.pdf
https://hdl.handle.net/11511/21948

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

A study on blended bottom ash cements Kaya, Ayşe İdil; Yaman, İsmail Özgür; Hoşten, Çetin; Department of Cement Engineering (2010) Cement production which is one of the most energy intensive industries plays a significant role in emitting the greenhouse gases. Blended cement production by supplementary cementitious materials such as fly ash, ground granulated blast furnace slag and natural pozzolan is one of the smart approaches to decrease energy and ecology related concerns about the production. Fly ash has been used as a substance to produce blended cements for years, but bottom ash, its coarser counterpart, has not been utilized du...
Properties of alinite cement produced by using soda sludge Kesim, Asli Gunes; Tokyay, Mustafa; Yaman, İsmail Özgür; Öztürk, Abdullah (2013-04-01) A production route of alinite cement clinker using the waste material of the Solvay process of the soda industry as the main raw material was searched. Soda sludge (73.5 wt%), clay (26.3 wt%) and minor amounts of iron ore (0.2 wt%) were mixed to obtain a raw mix that is later burned at nine different burning schemes. Four different burning temperatures (1050, 1100, 1150 and 1200 degrees C) and three different burning durations (60, 90 and 180 min) were applied for clinkerisation. The clinkers obtained were ...
Production of low-energy cements using various industrial wastes Canbek, Oğulcan; Erdoğan, Sinan Turhan; Department of Civil Engineering (2018) One economical method of lowering the cement related impact of concrete is partial replacement using industrial wastes like fly ash,natural pozzolan,etc. On the one hand its maximum kiln temperature being 150-200°C lower than that required for PC and higher grindability of its clinker make calcium sulfoaluminate(CSA) cements preferable. This study aims to produce CSA cement with partially or completely replace traditional raw materials with some industrial wastes such as fly ash,red mud and desulfogypsum an...
Investigation of combustion kinetics of treated and untreated waste wood samples with thermogravimetric analysis Yorulmaz, Sema Yurdakul; Atımtay, Aysel (2009-07-01) In the present study, combustion mechanisms, thermal kinetics, and phases of combustion were investigated for waste wood samples (untreated pine and treated MDF, plywood and particleboard). Waste wood samples were combusted in air at 10, 20 and 30 degrees C/min heating rates in TGA. The results of TG analysis have shown that thermal decomposition of treated samples takes place at lower temperatures as compared to the untreated pine sample because of the catalyzing effects of the chemicals in the samples. Th...
Breakage characteristics of cement components Avşar, Çağatay; Hoşten, Çetin; Department of Mining Engineering (2003) The production of multi-component cement from clinker and two additives such as trass and blast furnace slag has now spread throughout the world. These additives are generally interground with clinker to produce a composite cement of specified surface area. The grinding stage is of great importance as it accounts for a major portion of the total energy consumed in cement production and also as it affects the quality of composite cements by the particle size distribution of the individual additives produced ...

Citation Formats

M. Yılmaz, “A Study on the utilization of waste cement - bonded wood particle board as a raw material and a secondary fuel in cement manufacturing,” M.S. - Master of Science, Middle East Technical University, 2012.