Can coal gangue powder replace fly ash? What equipment is used to prepare gangue fly ash? Fly ash was originally a solid waste that no one cares about, but in the past 40 years of waste utilization practice, it has been increasingly used in the field of building materials. For example, fly ash (silicate) cement is a hydraulic The cementitious material is made of Portland cement clinker, fly ash and appropriate amount of gypsum. Coal gangue has similar chemical compositions to fly ash and clay, and the latter two are excellent building materials. Today, coal gangue ultrafine vertical mill manufacturer Guilin Hongcheng will analyze and answer for you.
Coal gangue has similar chemical compositions to fly ash and clay, and the latter two are excellent building materials. The difference is that the carbon content of fly ash coming out of modern near-critical and supercritical power plants is 3%. Therefore, compared with clay and modern fly ash, the normal carbon content of coal gangue is 8%-12%. It is on the high side, which is not conducive to the use of building materials and other promotion uses. In addition, the unprocessed coal gangue particles are coarse and irregular in shape, containing residual carbon and porous structure. When used as building materials, it requires a large amount of water and has low activity, making it difficult to promote. So, is it feasible to replace fly ash with coal gangue powder? Feasibly, coal gangue with a carbon content of less than 3% can be used to replace fly ash. So, what equipment is used to prepare gangue fly ash?
Coal Gangue Ultrafine Vertical Mill, welcome to leave a message or consult [email protected]
As an ultra-fine coal gangue powder processing and production equipment, the ultra-fine vertical mill can efficiently process coal gangue solid waste. It can not only reduce the pressure on environmental protection and effectively dispose of coal gangue solid waste; it can also use it to produce building material substitutes and effectively recycle coal powder. , saving energy and achieving multi-effective utilization of solid waste. First, the soft substances such as residual carbon in the gangue are separated into fine coal powder. The remaining hard coarse particles with a carbon content of less than 5% are sent to the vertical mill. In the grinding process, the coarse particles are The residual carbon burns (flameless combustion, also known as "smoldering") under the combined action of additives (heat-promoting combustion), friction heat and air (containing oxygen) provided by the air supply. The coarse particles are burned during grinding. As it becomes thinner, the residual carbon contained in it will be oxidized and consumed, and its carbon content will be reduced to 1% or less. At the same time, the porous structure becomes a micro-bead non-porous structure, which can be used to replace primary or secondary fly ash. By adjusting the parameters of the ultra-fine vertical mill, the final particle size of the gangue ultra-fine powder can be set to more than 80% passing through the 45 micron screen and less than 20% remaining after the sieve, reaching the standard of fly ash secondary ash; it can also be set It is set to pass more than 88% of the 45 micron screen and less than 12% of the screen residue, reaching the standard of first-grade fly ash.
The HLMX coal gangue ultrafine vertical mill produced by Guilin Hongcheng can transform the porous structure of coal gangue particles into ultra-fine coal gangue powder with a micro-bead non-porous structure, improve the activity of coal gangue ultra-fine powder, and reduce its use as building materials water demand. If you want to know more about the equipment, please leave us a message for details.
