It introduces several key links in raising the pelletizing ratio and intensity during the process of producingcold-pressed pelletizing. The highly effective results with energy saving can be attained, if the fine and concentrate ores beingeffectively utilized.
Roller ball press has the advantages of high ball formation rate, low power consumption, compact structure, easy maintenance and debugging, etc. It is widely used in refractory materials, power plants, metallurgy, chemical industry, energy, transportation, heating and other industries. The material formed by the roller ball press machine is energy-saving and environmentally friendly, easy to transport, and improves the utilization rate of waste materials, which has good economic and social benefits.
High-pressure roller mill is widely used in mineral processing engineering because of its faster processing efficiency, higher stability, low crushing cost, long service life, high technology content and good operability. It is mainly used for fine or ultra-fine crushing work of ores, processing iron ore concentrate and perfecting the self-grinding process, etc.
As the reality of carbon neutrality unfolds as a global trend and the pressure for net-zero carbon initiatives increases, it is clear that, despite these developments, the global economy cannot do without steel as a versatile material. In its Steel Technology Roadmap 2020, the International Energy Agency (IEA) predicts a 10% increase in global steel demand by 2050, noting that steel is deeply entrenched in our society, from buildings to infrastructure and transportation. The report also notes that many net-zero energy transition technologies rely heavily on steel, such as wind turbine solar panels and carbon capture and storage technologies.
The core equipment for the production of ready-mixed powder is the mixer, commonly used vertical ribbon mixer, paddle mixer, horizontal ribbon mixer, plough mixer and other forms. At present, large-opening paddle mixers and plough mixers are mostly used for ready-mixed powder.
Direct reduced iron (abbreviated as DRI) is a metallic iron product produced by the reduction of iron oxides in the solid state at a temperature where there is no melting or slagging. Since DRI has a sponge-like structure and its volume density is much smaller than that of ordinary pig iron, direct reduced iron is also called "sponge iron". When produced with oxidized pellets as raw materials, the product is still in the form of pellets, but the main component is metallic iron. In order to distinguish it from oxidized pellets, this product is called "metalized pellets". In order to improve the oxidation resistance of the product and to make it easier to transport, direct reduced iron is extruded in the hot state, where the product is called hot briquette (HBI), or in the cold state, where the product is called cold briquette (CBI).
Magnesium sulfate-based binder helps to reach highest metallization degree of BREX. Mineralogical study shows the difference in the iron-silicate phase’s development as well as in the porosity change during metallization depending on the binder used.
The results of the full-scale testing of the Extruded Briquettes (BREX) as the charge components of the industrial Midrex reactor are discussed. The influence of the type of binder on the degree of metallization of BREX is analyzed.
Mid-Autumn Festival is a traditional cultural festival popular among many ethnic groups across the country. It is so named because it happens to be in the middle of autumn. The moon is said to be the largest, fullest and brightest on this night. Since ancient times, people have had the custom of drinking and admiring the moon on the night of the Mid-Autumn Festival to express perfection and auspiciousness. It originated in the Zhou Dynasty, popularized in the Han Dynasty, stereotyped in the early years of the Tang Dynasty, and flourished in the Song Dynasty, and is known as the four major traditional festivals in China, along with the Spring Festival, Qingming Festival, and Dragon Boat Festival.
The porosity, as well as the carbon efficiency for direct reduction, were measured to determine the optimal conditions for the initial reduction, such as the size ratio of ore and coal particles. Thereafter, further reduction by the reducing gas was carried out to verify the effect of the preliminary reduction. The reduction kinetics of the reducing gas was also discussed.