The processing of nickel matte by electric furnace (electric arc furnace) are using a large input energy in the smelting process. The rest of the smelting process will produce in high capacity and temperature of waste heat. When waste heat discharges directly into the air, besides being a heat loss, the waste heat will also be a contributing factor of pollution in the air. PT Vale Indonesia (PTVI) is one of the nickel processing industry that have four (4) smelting electric furnaces that operates continuously and produce heat waste in the form of exhaust gas (off gas) with a high temperature in the range 600-800 0C. To meet of the exhaust gas regulation, PTVI builds exhaust gas handling facilities before being discharged into the air. Temperature of the exhaust gas will be lowered to about 350 0C by using a spray chamber, then in the second stage will be lowered to about 250 0C by adding secondary spray water before entering the baghouse and discharged into the air at 50 - 60 0C of average temperature. The main objective of this study is to recover waste heat from the electric furnace no.4 by utilizing heat energy from the exhaust gas before entering the spray chamber. The heat energy from the exhaust gas will be utilized to produce saturated steam by using Waste Heat Recovery Boiler (WHRB) by heating the water and converting the water into saturated steam 180 0C @ 10 Bar. This paper involves the (a) calculation of heat balance at electric furnace No 4, (b) Recover of the waste heat of off gas from the existing operation, (c) Generation of saturated steam in WHRB, (d) Financial evaluation for waste heat recovery boiler. This paper also will review the potential of waste heat when electric furnace operates in design parameter.

Original languageEnglish
Title of host publicationAdvanced Industrial Technology in Engineering Physics
EditorsAgus Muhamad Hatta, Katherin Indriawati, Gunawan Nugroho, Totok Ruki Biyanto, Dhany Arifianto, Doty Dewi Risanti, Sonny Irawan
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735418189
Publication statusPublished - 29 Mar 2019
Event2nd Engineering Physics International Conference 2018, EPIC 2018 - Surabaya, Indonesia
Duration: 31 Oct 20182 Nov 2018

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference2nd Engineering Physics International Conference 2018, EPIC 2018


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