we wish to report a mild and efficient one-pot three-component reaction of an aryl aldehyde, malononitrile and barbituric acid or 4-hydroxycoumarinfor the synthesis ofpyrano[2,3-d]pyrimidine and dihydropyrano[c]chromene derivatives in the presence of iron ore pellet as a natural and reusable catalyst under heterogeneous and green conditions. the present methodology offers several advantages suc...

The kinetics of the isothermal reduction iron ore–coke, ore–charcoal, and ore–biomass (straw) composite pellets were studied at 900–1200 °C. Compared with other two pellets, pellet using biomass as a reducing agent showed more rapid rate relatively low temperature. With an increase in temperature, rates three different tended to be equal. reactions all mainly controlled by gasification diffusio...

Depletion of high-grade iron ore resources leads to increasing use concentrates as raw materials for sinter. One the methods effectively utilize such is Mosaic EmBedding Iron Ore Sintering (MEBIOS), which pre-granulated green pellets are charged into sintering bed with mixture other materials. In this study, effects type and gangue mineral components on strength sintered pellet prepared fine we...

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 . ...

Please cite this article in press as: Bergquist, B. The ability to track and trace products in a production process and in the transportation chain from supplier to customers is important for quality control and process improvements. However, good traceability is often difficult achieve for continuous process products as well as for batch produced products where batches intermix. In this paper,...

Humic acid is inexpensive, and has a wide range of sources strong adsorption force with the surface iron ore, size its affected by some factors such as humic concentration, pH solution, metal cations. The modified pellet binder (MHA) adhesion high viscosity was obtained through separation purification solid wastes lignite weathered coal chemical modification treatment successfully applied in pr...