OCR Text |
Show - Page 2 - This paper shows the relationship between the percentage of oxygen enrichment of primary air with flue gas temperature and fuel (Sasol Gas) * (1)(2) savings, (Fig. 4). The added benefits of using an oxy-fuel burner, as well as oxygen enrichment of blast air to aid in the melting operation of Al-Bronze in a gas fired silicon carbide crucible furnace, are discussed and the results presented. Trials were conducted in the period November 1984 to May 1985. Figure 4 is based on oxygen enrichment trials conducted on Sasol gas fired rotary and reverbatory furnaces. The results given in this paper are not only taken from laboratory research work but also from tests conducted in two leading non-ferrous metal companies where installations have been recently commissioned. (1) Please refer to Appendix 1. (2) The results presented in this paper form part of the work for a thesis the writer is presently busy with. The thesis is entitled "The Development of a Mathematical Model to relate the Percentage of Oxygen Enrichment of Primary Air with Flue Gas Temperature, Calorific Value and with Fuel Savings for different Reducing, Neutral and Oxidising conditions." This thesis is of enormous value since it is applied to high temperature heating and melting operations of all types of fuel fired furnaces. The fuels used can be solid (e.g. P.F.), Liquid (from H.F.F. oil to Paraffin) and Gaseous (Incl. natural gas, liquid petroleum gases, etc.). The importance of the thesis is enhanced even further when one takes into account the vast range of materials the model can be applied to viz. Iron (different grades of grey, nodular and whyte), Steel (low all the way up to high alloyed), non-ferrous (Al and Al-alloys, Cu and Cu-alloys), Pb, etc. and the ceramic industry e.g. glass and frit melting. |