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Section 15. MISCELLANEOUS DEVELOPMENT OF COMMERCIAL PRODUCTS FROM INDUSTRIAL WASTES Mir Akbar Ali, President Glass 8c Ceramics International, Inc. Lomita, California 90717 INTRODUCTION The recycling of industrial wastes into the economy epitomizes a constructive use of our abundant waste material. In fact, this could be the basis for converting the waste into a valued industrial product. In this context, the utilization of fly ash (generated by coal-burning power plants) and cement kiln dust (generated by cement plants) are a viable commercial opportunity. Each year, the coal-burning power plants and the cement plants are faced with increasing stringent regulations which prohibit the dumping of fly ash and cement kiln dust (CKD) and similar industrial waste materials [1,2]. Currently, the coal-burning utilities generate over 40 million tons/year of fly ash and similar quantities of CKD are collected by the cement plants. This paper describes a synergistic approach wherein both fly ash and CKD are effectively utilized in the development of a commercial product such as mineral wool. Most industrial research efforts result in the development or indicate the potentials for commercial exploitation. However, a judicious selection has to be made which would establish such exploitation as economically viable projects. The development of mineral wool and similar products from fly ash and CKD has the potential for commercial exploitation due to their abundance, negative cost (disposal cost) and close proximity to industrial cities where both the raw materials (industrial wastes) and the potential product (mineral wool) can be utilized. IDENTIFICATION AND SELECTION OF WASTES Coal ash from Southern California Edison's Mojave Generating Plant along with CKD from California Portland Cement Company's Colton Plant was utilized. These two plants are not only close to each other, but are also close to Los Angeles. "As Received" fly ash and CKD were chemically analyzed. Table I presents the wet chemical analysis of these two materials. It should be emphasized that in most of the waste utilization (resource recycling) efforts, the economics dictate that the waste be utilized, as much as possible, in the "as in" condition. The utilization of "as-received" fly ash and CKD was based on this rationale. TECHNICAL APPROACH The technical approach for the research was based on a theoretical concept which has been described in detail in the published articles [3,4]. The salient features of the concept are: 1. Development of mineral wool forming compositions based on fly ash, CKD and a fluxing agent. 2. Establishment of their alkalinity ratio (acid to base ratios for fly ash and CKD). 3. Design and formulation of compositions such that the alkalinity ratio is in the range of 0.8-1.20. Based on these concepts, over a dozen experimental compositions were successfully designed and formulated. The batches were melted in 1, 2, and 5 lb. crucibles. The molten batch was poured over a 863
Object Description
Purdue Identification Number | ETRIWC198386 |
Title | Development of commercial products from industrial wastes |
Author | Ali, Mir Akbar |
Date of Original | 1983 |
Conference Title | Proceedings of the 38th Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://e-archives.lib.purdue.edu/u?/engext,34749 |
Extent of Original | p. 863-866 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Date Digitized | 2009-07-28 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 863 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | Section 15. MISCELLANEOUS DEVELOPMENT OF COMMERCIAL PRODUCTS FROM INDUSTRIAL WASTES Mir Akbar Ali, President Glass 8c Ceramics International, Inc. Lomita, California 90717 INTRODUCTION The recycling of industrial wastes into the economy epitomizes a constructive use of our abundant waste material. In fact, this could be the basis for converting the waste into a valued industrial product. In this context, the utilization of fly ash (generated by coal-burning power plants) and cement kiln dust (generated by cement plants) are a viable commercial opportunity. Each year, the coal-burning power plants and the cement plants are faced with increasing stringent regulations which prohibit the dumping of fly ash and cement kiln dust (CKD) and similar industrial waste materials [1,2]. Currently, the coal-burning utilities generate over 40 million tons/year of fly ash and similar quantities of CKD are collected by the cement plants. This paper describes a synergistic approach wherein both fly ash and CKD are effectively utilized in the development of a commercial product such as mineral wool. Most industrial research efforts result in the development or indicate the potentials for commercial exploitation. However, a judicious selection has to be made which would establish such exploitation as economically viable projects. The development of mineral wool and similar products from fly ash and CKD has the potential for commercial exploitation due to their abundance, negative cost (disposal cost) and close proximity to industrial cities where both the raw materials (industrial wastes) and the potential product (mineral wool) can be utilized. IDENTIFICATION AND SELECTION OF WASTES Coal ash from Southern California Edison's Mojave Generating Plant along with CKD from California Portland Cement Company's Colton Plant was utilized. These two plants are not only close to each other, but are also close to Los Angeles. "As Received" fly ash and CKD were chemically analyzed. Table I presents the wet chemical analysis of these two materials. It should be emphasized that in most of the waste utilization (resource recycling) efforts, the economics dictate that the waste be utilized, as much as possible, in the "as in" condition. The utilization of "as-received" fly ash and CKD was based on this rationale. TECHNICAL APPROACH The technical approach for the research was based on a theoretical concept which has been described in detail in the published articles [3,4]. The salient features of the concept are: 1. Development of mineral wool forming compositions based on fly ash, CKD and a fluxing agent. 2. Establishment of their alkalinity ratio (acid to base ratios for fly ash and CKD). 3. Design and formulation of compositions such that the alkalinity ratio is in the range of 0.8-1.20. Based on these concepts, over a dozen experimental compositions were successfully designed and formulated. The batches were melted in 1, 2, and 5 lb. crucibles. The molten batch was poured over a 863 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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