This paper presents the idea of increasing the effectiveness of slag decopperisation in an electric furnace in the "Głogów II" Copper Smelter by replacing the currently added CaCO3with a less energy-intensive technological additive. As a result of this conversion, one may expect improved parameters of the process, including process time or power consumption per cycle. The incentives to optimize the process are the benefits of increasing copper production in the company and the growing global demand for this metal. The paper also describes other factors that may have a significant impact on the optimization of the copper production process. Based on the literature analysis, a solution has been developed that improves the copper production process. The benefits of using a new technology additive primarily include increased share of copper in the alloy, reduced production costs, reduced amount of power consumed per cycle and reduced time it takes to melt. At the conclusion of the paper, the issues raised are highlighted, stressing that mastering the slag slurry process in electric furnaces requires continuous improvement.
In the present dynamic environment, manufacture are required to reduce product development
cycle time and enhance product quality. To meet such challenges many business
are developing closer relationships with their business partner through application of interorganisational
system. Electronic data interchange (EDI) providing a structured form of
communication and has become very popular vehicle for electronic communication. Since
the EDI concept was popularised in 1990, there is a growing recognition by practitioners
and academics. The aim of this study is to perform an analysis of EDI research, give the
current discussion regarding the trends and note the suggestions for the future directions
of EDI research in the manufacture. In this paper, we provide a wide coverage of excessively
citations on EDI from 1990 to 2017 from good references in this area. The papers are
classified into EDI implementation strategy, EDI adoption, EDI integration, EDI in supply
chain and EDI in small and medium enterprises (SMEs). The study results of this literature
review are expected to assist development of EDI research especially the implementation of
EDI on production outsourcing as one of supply chain activities.
Thermal/cold spray deposition were used for additive manufacture of oxide dispersion strengthened (ODS) steel layers. Mechanically alloyed F/M ODS steel powders (Fe(bal.)-10Cr-1Mo-0.25Ti-0.35Y2O3 in wt.%) were sprayed by a high velocity oxygen fuel (HVOF) and cold spray methods. HVOF, as a thermal method, was used for manufacturing a 1 mm-thick ODS steel layer with a ~95% density. The source to objective distance (SOD) and feeding rate were controlled to achieve sound manufacturing. Y2Ti2O7 nano-particles were preserved in the HVOF sprayed layer; however, unexpected Cr2O3 phases were frequently observed at the boundary area of the powders. A cold spray was used for manufacturing the Cr2O3-free layer and showed great feasibility. The density and yield of the cold spray were roughly 80% and 45%, respectively. The softening of ODS powders before the cold spray was conducted using a tube furnace of up to 1200°C. Microstructural characteristics of the cold sprayed layer were investigated by electron back-scattered diffraction (EBSD), the uniformity of deformation amount inside powders was observed.
A number of technologies is developed that substitute simple metal cores in the high-pressure casting technology. Soluble cores, namely
on the salt basis, represent the highest prospect. The contribution gives the results of the production of salt cores by high-pressure
squeezing and shooting with using a binder. Special attention is paid to the shape of NaCl salt crystals with additives and the influence on
strength properties of cores. A technology of bonding the salt cores is developing. Salinity of circulating water is studied and it is checked
with the aid of electrical conductance.
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