Biomass was used as reducing agent to roast the Baotou low-grade limonite in a high temperature vacuum atmosphere furnace. The effect of calcination temperature, time and ratio of reducing agent on the magnetic properties of calcined ore was studied by VSM. The phase and microstructure changes of limonite before and after calcination were analyzed by XRD and SEM. The results show that in the ro...

In order to simplify the factor which affected on granulation properties of iron ore, experiment was conducted by using nuclei and fine ore having smooth surface. The effect particle size hematite strength investigated. results obtained are follows:

Ore grinding system is a multivariable mechanism which is used in mining industry, metallurgy, cement production, chemicals, pharmaceuticals, ceramics and various research laboratories. Previous control methods of this system include open multi-loop PID controller, Model Predictive Control (MPC), adaptive control and robust control. The mentioned techniques do not show proper performance, when ...

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...