Steel slag powder products have good market prospects. At present, the existence of free CaO and MgO in steel slag reduces its volume stability; The high content of iron oxide increases the grinding difficulty, high power consumption per ton of slag powder, and difficult processing of steel slag powder. Therefore, the sales volume of steel slag powder is small. The comprehensive utilization of steel slag powder by stainless steel slag grinding mechanism is still an emerging market to be developed. The following describes the principle and technology of comprehensive utilization of stainless steel slag in papermaking:

It is inevitable to produce stainless steel slag in the process of steel (stainless steel) production. The comprehensive utilization of stainless steel slag for papermaking not only solves the problem of environmental pollution caused by steel slag, but also can produce high economic benefits. So, how to make paper with steel slag? The inventors, Chinese scholars Liu Fuxing and Liu Zhiyong, have found through a large number of studies and experiments that the stainless steel slag has experienced high temperature and its chemical composition is relatively stable. The content of CaO is high, and the harmful elements are relatively small, which can be used for papermaking. They provide a papermaking technology with comprehensive utilization of stainless steel slag.

The principle of comprehensive utilization of stainless steel slag in papermaking technology is to use stainless steel slag as the raw material for papermaking, and use the ultra-fine powder technology of steel slag vertical roller mill and high intensity magnetic separation technology to treat the stainless steel slag, so that the stainless steel slag becomes ultra-fine powder with a particle size of 800~1000 mesh and can be used for papermaking, and then use the ultra-fine powder as the main raw material and polymer material to mix modified filling, and then press to form the base paper. In addition, the paper produced by the comprehensive utilization of papermaking technology of stainless steel slag will be automatically brittle into broken eggshell after six months of sunlight exposure, and the earth will return to nature. Buried underground for one year, it can be degraded into powder (inorganic mineral powder), without causing environmental pollution. After recycling, the carton can be directly returned to the production line for use (the traditional process needs to be repulped). Even if it is incinerated in an incinerator, only the macromolecular material is burned. The stainless steel slag powder can promote the contact between the macromolecular material and the air to accelerate the complete combustion. It will not produce black smoke due to suffocation due to lack of oxygen. There is no toxic waste gas after combustion, and the amount of carbon dioxide emissions is very small.

The stainless steel slag is comprehensively used as paper making equipment, including the dry milling system: including magnetic separator and steel slag powder vertical roller mill. The stainless steel slag is removed by magnetic separator and then formed into ultra-fine powder with a particle size of 800~1000 mesh by steel slag powder vertical roller mill; Calendering paper making system, including polymer material modification device and calender; The dry powder preparation system and the calender paper making system are arranged in sequence along the process direction. The calender paper making system, the ultrafine powder is modified by the polymer material modification device and then passes through the calender to form base paper. The technological process of comprehensive utilization and papermaking of stainless steel slag is as follows: the stainless steel slag with the particle size of 0~200mm is crushed to 0~15mm after passing through the secondary jaw crusher, and the fine particles with the particle size of 0~15mm are screened through the vibrating screen, and then crushed to 0~8mm through the crusher, and then magnetic separation is carried out after the magnetic separation, and the steel slag after the metal removal by magnetic separation is grinded to 800-1000 mesh by the steel slag fine powder vertical roller mill; The paraffin added as auxiliary material enters the mixer, and then enters the calender for calendering and papermaking after being modified by the polymer material modification device.

The technical difficulty of comprehensive utilization of stainless steel slag in papermaking lies in the dry milling system. Due to the high content of iron oxide in steel slag, the grinding difficulty is increased, and the high power consumption per ton of slag powder is high, and the processing of steel slag powder is difficult. Based on this, the HLMX steel slag vertical roller mill system developed and produced by HCMilling(Guilin Hongcheng) provides technical support for the comprehensive utilization of stainless steel slag for papermaking. Using steel slag powder vertical roller mill to produce one ton of 800-1000 mesh steel slag powder can save 30%~50% of electricity than using traditional ball mill to produce the same weight of powder, and the hourly output is greatly increased, meeting the production demand of comprehensive utilization of stainless steel slag in papermaking industry. Steel slag is milled by steel slag vertical roller mill. The materials are ground in a high temperature (100 ℃~300 ℃) and humid environment. Most of the free calcium oxide and free magnesium oxide in the steel slag powder are hydrated into highly active calcium hydroxide and magnesium hydroxide. During the production of steel slag powder, only part of the hot gas is needed to dry the water in the steel slag and there is no smoke emission. The preparation of steel slag powder by stainless steel slag grinding mill is also a green environmental protection project. It can not only turn waste into treasure, improve the added value of steelmaking, create considerable economic benefits for steel enterprises, but also protect the environment. If you want to know about steel slag micro-powder papermaking and steel slag micro-powder vertical roller mill, please contact HCM for equipment details.