การศึกษาสมบัติทรายดำจากอุตสาหกรรมหล่อหลอมโลหะ เพื่อใช้เป็นวัสดุผสมกับปูนซีเมนต์ในการหล่อแข็ง

Characteristic of Moulding Sand Waste from Steel Melting Industry Using as Cementitious Binder in Solidification

Name: วราภรณ์ กิจชัยนุกูล

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Name: Waraporn Kitchainukul

keyword: Utilization

; Mercury stabilization

; Solidification

; Pozzolan

; Fine dust from baghouse filter

; Steel melting industry

Abstract: Used moulding sand and fine dust from baghouse filter are solid waste generated fromsteel melting industry. The preliminary study was carried out in order to classify types of solidwaste by testing the leaching of heavy metal. It was found that these waste are non-hazardouswaste. Further analysis in the chemical property of these solid waste show the combination ofsilicon oxide, aluminum oxide, and iron oxide were more than 70% and sodium oxide was lessthan I .5X . It was indicated that these solid waste were pozzolanic materials. The fine dust frombaghouse filter and used moulding sand could be used as .cement binding mixture forsolidification. In this study, fine dust was selected to determine its possibility for utilizationsince used moulding sand were recycled in the moulding process.The suitable proportion of fine dust to cement to water for solidification in landfillwas 80 : 20 : 0.28 by weight. After the 28th day of the curing time of solidified material thecompressive strength, the absorption, and the permeability were 166 kg/cm2, 15.25%, and1.5 x 10 -5 cm/second, respectively. This suitable proportion was used as solidified mercuryobtained from COD analysis sludge. It was found that mercury sludge was stabilized up to0.8% by weight which contained 50.28 ktg mercury per gram of solidified material. Theleaching test of mercury did not exceed the criteria standardThe proportion of fine dust from baghouse filter to cement at 30 : 70, the compressivestrength and absorption of the above products were 967 kg/cm2 and 7.64% respectively. Fromthese results, it can be used as cement binder for hollow non-load-bearing concrete masonryunits, concrete flooring tiles, and concrete building bricks. Furthermore, when considering thechemical properties of fine dust from baghouse filter, it is suggested that this fine dust can beused in other industries such as ceramic industry and recycling of aluminum.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร

Email: info.lib@mail.kmutt.ac.th

Name: ภาวิณี ชัยประเสริฐ

Role: อาจารย์ที่ปรึกษา

Created: 2541

Issued: 2005-09-12

Modified: 2554-05-16

ISBN: 9746242431

CallNumber: EV126

tha

DegreeName: วิทยาศาสตรมหาบัณฑิต

Level: ปริญญาโท

Descipline: เทคโนโลยีสิ่งแวดล้อม

Grantor: มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

©copyrights

ใช้เวลา

0.013332 วินาที