eprintid: 3658
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/36/58
datestamp: 2023-11-09 15:51:55
lastmod: 2023-11-09 15:51:55
status_changed: 2023-11-09 15:47:20
type: article
metadata_visibility: show
creators_name: Ugheoke, B.I.
creators_name: Mamat, O.
creators_name: Ari-Wahjoedi, B.
title: Optimization of production process parameters of rice husk silica (RHS) refractories
ispublished: pub
keywords: Compaction pressure; Crushing resistance; Industrial production; Modulus of rupture; Parameters optimization; Powder compactions; Production process; Rice husk silica, Binders; Compaction; Mechanical properties; Optimization; Production engineering; Silica; Silicate minerals; Sintering, Refractory materials
note: cited By 2
abstract: The parameters necessary to aid the industrial production of rice husk silica refractory using PEG 8000 as binder and slaked lime as dopant (mineralizer) have been studied. The optimal value of the dopant - Ca(OH) 2 was determined to be around 1.4. Percentages beyond 2.6 result in the formation of pseudo-wollastonite, with decreased mechanical properties of the refractory. The investigations here have shown that an optimum pre-firing temperature should be chosen from the range 1250 to 1350°C, since the highest modulus of rupture (MOR) necessary for handling the produced refractories occurs within this range, and is consequent upon the tridymitization of the refractory body within this temperature range. The compaction pressure range that is optimal for good sintered density, apparent porosity and MOR falls between 90 and 110 MPa. However, pressure necessary for green powder compaction is dependent on the type of binder used, as each binder has its own young modulus, which affects its crushing resistance.
date: 2013
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876578791&partnerID=40&md5=e0e127473b0aab6afb3b62ff3522ab1f
full_text_status: none
publication: Journal of the Australian Ceramic Society
volume: 49
number: 1
pagerange: 92-100
refereed: TRUE
issn: 0004881X
citation:   Ugheoke, B.I. and Mamat, O. and Ari-Wahjoedi, B.  (2013) Optimization of production process parameters of rice husk silica (RHS) refractories.  Journal of the Australian Ceramic Society, 49 (1).  pp. 92-100.  ISSN 0004881X