Production of Lamellar Cast Iron EN-GJL-150 From Local Manganese-Rich Pig Iron by Modification of the Melting Process

Abstract

In the present study, a modified duplex melting process was set up so as to be able to produce an EN-GJL-150 gray cast iron from a local manganese-rich pig iron. A descriptive statistics showed an average Mn and Si content in raw material such that: Mn % = 2.457±0.133 and Si % = 0.682±0.088. The demanganization process was run and monitored in a cascade of two industrial-scale furnaces: a rotary kiln and an electric arc furnace. The performed experiments indicated that: 1) the manganese content decreased from 2.45 % to 0.94 %, 2) the manganese oxidation obeys the first order kinetic model, 3) Brinell and Rockwell hardness’s decreased by 38.83% and 27.81% respectively, and 4) the produced cast iron has a pearlitic microstructure with a small fraction of ferrite (1 to 5%) in the matrix and traces of cementite. All results showed that the produced castings comply with the standards in force for EN-GJL-150 cast irons, similar to gray cast iron ASTM A48 Class 20.

Technical-economic study of PVC-based formulations intended to industrial 3-wire electric cables, using a full factorial design methodology

“…Thereby, the resistance to wear by either friction or erosion (by steam, oil, and water) generally increases with hardness. 19…”

“…Thereby, the resistance to wear by either friction or erosion (by steam, oil, and water) generally increases with hardness. 19 The density was measured using a LHOMARGY model Densimeter. The tests were carried out on samples in any shape of 4 to 5 g cut beforehand from the molded plates.…”