subject: Liming Heavy Industry Technology Breakthrough Power Mill Iron Fly Ash Election [print this page] Liming Heavy Industry Technology Breakthrough Power mill iron fly ash election
Fly ash beneficiation is based on the various components of the physical and chemical properties of different, respectively flotation, magnetic separation, electrostatic separation, gravity separation and chemical processing methods such as recycling, be used. How to recover iron from fly ash? Iron in fly ash mainly Fe2O3, Fe3O4, and the form of iron silicate. Fly ash particles in the combustion of pyrite and iron have been enriched; through magnetized baked Rao, some into magnetite, Fe3O4 crystals. x 1 diffraction analysis that the large quantity of its internal packet Fe2O3, which on the whole iron and iron in fly ash recycling. Generally use the magnetic separation method, selection is better. Of the original fly ash slag content of total iron is low, should pre-enrichment, pre-selection of equipment available hydrocyclones. For example, a thermal power plant ash as magnetite on the original proportion of rice that, after pre-selection by the cyclone, from a row of sand fly population out of total iron slag has been enriched. The total iron grade from 13.91% up to 20.84%, total iron recovery rate was 65.91% of total iron in the ash residue enriched by cylindrical. Recovery of iron minerals from the ash without stripping, mining, selected from the fly ash to the cement plant magnetite can be fired the first cement raw materials, followed can be mixed with high grade iron ore in for ironmaking raw materials.
Alumina in fly ash and other scattered elements of the recovery and use; in the fly ash is non-activity of Al2O3 Al-rich vitreous andalusite (3Al2O3.SiO2) of the form, can be used when the method of recovery of chemical beneficiation . Application of acid leaching as the United States ho aluminum chloride from the ash obtained. As the large surface area of fly ash, adsorption ability, the characteristics of high condensation. This formation of solid coal combustion fly ash in the over, there may be adsorption, reduction, enrichment of certain rare element. This is scattered elements of the recycling collection possible.
Fly ash as a new mineral resources. The development and utilization of broad prospects. A lot of research and practice at home and abroad to prove. Use the appropriate method of beneficiation. Comprehensive sets recovery and use. To solve the environmental pollution and fly ash to make it an important resource direction. Also increase the value of comprehensive utilization of fly ash effective means. Crushing, grinding and other steps, its investment is only selected from iron ore about 1 / 4, thus saving a large number of infrastructure and operating expenses. Weak magnetic dressing machine sorting, all of the iron concentrate grade of 45.22% iron recovery was 39.17%. Recycling is beneficial. Work at home and abroad Ash
compared with the past, there have been significant changes, mainly as follows: ash governance guidelines from the past into pure environmental point of comprehensive management, resource utilization; powder Comprehensive Utilization of coal ash to the subgrade from the past, fill, concrete admixture, the transformation of the application of the soil, the development of the current in the cement raw materials, cement, wood, large-scale water control project, pumping concrete, large concrete products, fillers, etc. Upgrading the High Utilization. Fly ash processing equipment recommended ladder mill, after years of painstaking Liming Heavy Industry technology experts and innovative research and development, according to the user and the proposed mill, roller mill in the high-pressure suspension based on the updates made to improve the design for the majority of domestic and international customers a latest, high efficiency, energy-saving high-fine milling equipment, milling machine using trapezoid trapezium working surface, flexible connection, roll linked pressure boost, etc. 5 grinding mill patented technology, created overpressure trapezium mill of the world's highest level.
