Purification of Carbon - based Refractories
Posted by adela li on October 21st, 2016
Effective use of refractories after use for the conservation of resources and recycling of resources is of great significance. To this end, to improve the use of recycled refractories after a lot of research. In improving the utilization of refractories after use, the need to study the use of refractories after sorting, matching, construction and quality management, and many other technical problems. In this paper, a typical carbon-based refractory MgO-C refractory brick, for example, introduced after the refractory special treatment, so that the quality characteristics of refractories to achieve high value, and improve the recycling rate of technology.
Purification treatment
Among the various refractories, the carbon-based refractories Ladle Permeable Brick are relatively easy to be recycled because of the small amount of mixed iron and steel slag. Japan's Kurosaki Harima mill (strain) Technology Research Institute developed a high content of magnesium oxide extraction, as a high value for use of technology. This technology is called purification, extraction of raw materials is called purified raw materials.
Pretreatment
Before the purification treatment, the following process should be used for the pretreatment of the used refractory material.
1) After the selection of MgO-C refractory bricks
With the assistance of recycling agencies, the materials used for sorting refractories, recycling. If necessary, markings are imprinted on the magnesia carbon brick before use, and are sorted on the basis of the marks at the time of recovery.
2) removal of impurities
In the obvious iron and steel slag adhesion and foreign matter into the time, to remove these impurities.
3) Water treatment
The recovered MgO-C firebrick refractory sale were left in the outdoor for several months and then coarsely crushed into 100 mm particles by a jaw crusher, and then immersed in water for 24 hours to promote the remaining aluminum carbide in the refractory bricks, aluminum nitride and water A reaction occurs, impurities are generated and pulverized to remove them.
4) Drying and crushing
The water-treated MgO-C refractory bricks were dried at a temperature of about 300 ° C. And then crushed by the impeller crusher to about 10mm particles.
5) The above-treated MgO-C refractory bricks were loaded into the raw material hopper.
Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
