Step 1: 废气净化
电炉排出的烟气经过通风柜, main flue gas pipeline, 经过冷却器冷却后进入旋风分离除尘器, 然后经过布袋除尘器. 烟气通过风机进入布袋除尘器, 粉尘被滤袋内表面截留, 净化后符合环保标准的烟气从滤袋外排出，上升至除尘器顶部，经排放口排入大气.
Step 2: micro silica fume collection
当设备运行阻力或时间达到设定值时, 卸灰过程开始. 利用主风机前段负压, the dust cleaning process of each compartment of the bag filter is realized through the switching of the anti-suction duct and inlet and outlet duct valves, and the recovered dust is sent to the micro silica fume homogenizing device by the fan through the ash conveying duct.
Step 3: Encryption of micro silica fume
The initial density of micro silica fume collected through the bag filter is only 150-200kg/m3, which costs a lot in transportation. 所以, after encryption, the micro silica fume is in the shape of a sphere, and the specific gravity of the pile is increased from about 0.2t/m3 of bulk micro silica fume to 0.3~0.6t/m3, which can reduce the packaging and transportation cost by about 30~60%. 同时, the loading and unloading efficiency is improved, storage space and land area are also reduced, and the production site dust phenomenon is greatly reduced, improving labor conditions and the environment.
Future trends of micro silica fume in China
最近几年, due to the country’s attention to environmental protection, gradually strengthen the management of polluting enterprises, especially the increase in domestic demand for high-strength concrete, many ferroalloy production enterprises equipped with dust collection equipment, and the development and introduction of encryption technology. China’s micro silica fume products are developing rapidly. 高强混凝土, micro silica fume shotcrete, silica powder mortar, low-cement casting materials and other scientific research achievements have passed the ministerial or provincial and municipal technical appraisal, and have been applied in many projects, with remarkable technical and economic results.
With the development of national economic construction and the vigorous construction of China’s 18,000 kilometers of coastline (deep-water harbor terminals, cross-sea bridges, offshore drilling platforms, ETC。), the application areas of micro silica fume will certainly be further expanded. In the face of such a huge market, the production management, quality control and supply assurance system of micro silica fume have put forward higher requirements, not only to ensure the production and supply of large quantities, but also to achieve modernized, scientific and refined management in the process, so as to achieve the real sense of turning “waste” into treasure.
