The emission of coal gangue is increasing year by year, causing more and more serious pollution to the environment, but it cannot be used rationally. Especially because of its low activity it cannot be used on a large scale in the construction industry. So, how to activate coal gangue? What are the gangue activation machines? Today, Guilin Hongcheng, a manufacturer of coal gangue activation machines, will introduce to you the mechanical activation method of coal gangue.
The reason why coal gangue can be activated is that it mainly contains Al and Si elements. However, because it contains carbon and has a relatively stable structure, activation is difficult. Therefore, as long as the carbon in the gangue is removed and its stable structure is destroyed, the activation rate can be improved. The current activation methods include mechanical activation, thermal activation, chemical activation and their combination - composite activation. Among them, the mechanical activation method is widely favored by the cement and building materials industry due to its low processing cost, simple process flow, and suitability for industrial production.
The mechanical activation method of coal gangue is also usually called physical activation, which refers to the activation method of grinding the material into fine particles to improve its activity. Mechanical grinding can quickly refine the particles, increase the specific surface area of the particles, and increase the interface for hydration reaction. Mechanical activation has good effects in the treatment of coal gangue, fly ash and slag. By ultra-fine grinding of coal gangue, the particles become very small, which can not only fill the capillary pores of the hardened structure and play a role in density enhancement, but also increase the specific surface area of the coal gangue. At the same time, dislocations, point defects and structural defects appear on the surface of its particles. The amorphous degree of silicon oxide and aluminum oxide increases, and the free energy of the surface of the particles increases, thereby improving its gelling activity. It can consume calcium hydroxide and gypsum at an extremely fast rate. Promote the secondary reaction between the mixed material and the cement hydration products to increase the hydration products generated, thereby improving the strength.
What are the gangue activation machines? Gangue activation machine is usually a complete set of equipment consisting of a crusher, grinder, elevator, dust collection system, etc. Among them, the gangue grinding mill is the host equipment of the gangue activation machine system, and usually vertical mills, Raymond mills, etc. can be selected.
1. Raymond mill: The discharge particle size of this machine is between 80-400 mesh. It is mainly suitable for various non-flammable and explosive materials with Mohs hardness below 7 and humidity within 6%. Among them, the HC1700 Raymond mill produced by Guilin Hongcheng has about 2.5 to 4 times higher output than similar 5R equipment, effectively reducing energy consumption. The HC3000 model is a super-large Raymond mill that can meet the ever-expanding industrial scale production.
2. Vertical mill: The discharge granularity of this machine is adjustable between 80 and 600 mesh. It focuses on large-scale powdering fields such as slag, coal powder, cement, and non-metallic ores. It is a high-efficiency, energy-saving and intelligent grinding equipment. The HLM series vertical mill is an advanced, energy-efficient and energy-saving grinding equipment developed by Guilin Hongcheng through study and more than 20 years of painstaking research, which integrates crushing, drying, grinding, grading and transportation. This product solves the problems of low output, high energy consumption, and high maintenance costs of ordinary industrial mills. The product performance reaches the international advanced level and can replace expensive imported vertical mills to meet the needs of large-scale, intelligent, and intensive industrial milling.
Coal gangue is activated through processes such as calcination and then ground into fine powder for use as cement mixing materials. When the dosage is larger, the cement still shows better strength properties; therefore, when combined with high-quality cement clinker, it can produce Various grades of cement. However, when the dosage of activated coal gangue fine powder is high, it will have a certain degree of adverse effects on the rheological properties of the cement slurry, that is: as the dosage and standard consistency of water consumption increase, the mortar The fluidity decreases, but the setting time changes little. It can be considered that using coal gangue as cement mixing material after activation treatment is a feasible way to achieve effective utilization of coal gangue.
The coal gangue vertical mill, coal gangue Raymond mill and other equipment produced by Guilin Hongcheng are ideal coal gangue activation machines that can be used for the mechanical activation method of coal gangue, providing good equipment assistance for the production of cement mixture materials from coal gangue. If you have relevant needs, please leave us a message for details.