Improving the overall energy efficiency of processes is necessary to reduce costs, lower specific consumption and thereby direct or indirect emission gases that contribute climate change. In many metallurgical processes, a large amount lost with off-gas. recycling off-gas often can be used preheat to-be-recycled metal scrap, leading significantly higher efficiency. However, application preheati...

A hydrometallurgical process for recycling spent Zn-MnO2 batteries was developed, involving leaching with sulfuric acid, purification by precipitation and metals separation for further recovery. Leaching of zinc oxide was easily attained while for manganese oxide was rather difficult depending on temperature and acid concentration. At 90oC and with the liquid/solid ratio of 20 L/kg, more than 9...

This article presents the results of a research on recycling wastes from metallurgical plants in city Pavlodar at steel smelting plant KSP Steel. The pellets were produced with aspiration dust and mixed steelmaking (white) slag, ferrous sand, scale. fired temperature 600 ° C. experience use 20% white sand 10% mill scale shows, after burning furnace, quite satisfactory strength, which is 80 kg /...

This research aims to analyse the factors affecting behaviour of domestic solid waste reduction in households Dien Chau town (Nghe An province) by using Probit regression model. The data was collected from 60 households. results showed that study area is mainly and organic waste. Besides, there were wastes, are paper, scrap, metal, plastic, could be recycled reused. Results surveyed many activi...

This paper studies a single-stage production system, two-stage production system where specification limits are designed for inspection. When quality characteristics fall below a lower threshold or above an upper threshold, a decision is made to rework or scrap the item. The target is to determine the optimum target for a process based on rework or scrap costs. In contrast to previous studies, ...