K e y w o r d s C o n t r o l volume, Iron ore direct reduction, Composite pellet, Axisymmetric heat transfer. 1. I N T R O D U C T I O N Some coal-based i ron ore direct reduc t ion processes are based on format ion of composi te pellets which consist of a mix ture of fines of i ron-bear ing oxide, carbonaceous mater ia l , for example, coal, coke, or char and a smal l a m o u n t of binder . ...

in this work, hydrochloric acid is used to remove iron impurities in the bauxite ore contained in the diasporite mineral located in the sari region. the bauxite ore was calcined at different temperatures and times, and then dissolved in a hydrochloric acid solution. after determining the optimum calcination conditions in 1 h at 900 °c, the response surface methodology (rsm) with four factors in...

An experimental study was conducted to determine the effects of the leaching parameters on impurity ion concentrations of the liquid phase in ulexite leaching. Powdered ulexite ore was leached in an aqueous medium with sulfur dioxide. The Taguchi experimental design approach and statistical methods were used to evaluate the effects of the leaching parameters (solid/liquid ratio, temperature...

River Mandovi and Zuari (west coast of India) are flowing through iron and manganese mining areas and are heavily used for iron and manganese ore transport. This region generates 25-30 million tons of mining rejects per year. The iron ore of Mandovi-Zuari catchments area has approximately 50.04 μg/g of arsenic and partial dissolution of the mining rejects could enrich the dissolved arsenic in e...

Sodium chloride has been proved that it is an effective promoter for the reduction of high-magnesium, low-nickel oxide ore. The aim of current work is to clarify the promotion behavior of sodium chloride in the roasting reduction process. The influence of moisture on the reduction of ore in the presence of sodium chloride is studied to get clear comprehension of promotion process. In the presen...