METHOD OF RECYCLING AND REUSING WASTE MAGNESIA-CARBON BRICK

摘要

A method of recycling and reusing waste magnesia-carbon brick, comprising the following steps: ① Pulverizing the waste magnesia-carbon brick to obtain powdered-ore. ② Pouring the powdered-ore into an agitation trough, adding water, and then agitating to obtain ore slurry. ③ Roughing, then sending the resulting froth through a conduit to be subjected to a first cleaning process, and then subjecting the ore slurry to a first scavenging process. ④ Performing the first cleaning process: using a mechanical agitation floatation machine to carry out cleaning, and then subjecting the floatation-produced froth to a second cleaning process. ⑤ Performing the second cleaning process: using two air-suction/ore slurry-suction dual-function mechanical agitation flotation machines to carry out cleaning. ⑥ Subjecting the ore slurry resulting from roughing in step ③ to a first scavenging process, and then subjecting the flotated ore slurry to a second scavenging process. ⑦ Performing the second scavenging process, and then subjecting the flotated ore slurry to a third scavenging process. ⑧ Performing the third scavenging process, and then subjecting the flotated ore slurry to a fourth scavenging process. ⑨ Performing the fourth scavenging process, and then concentrating, pressure-filtering, dehydrating and drying the flotated ore slurry to obtain magnesite. After having been subjected to the processes in the present method, waste magnesia-carbon bricks can be reused, allowing for the recycling and reuse of materials and a reduction in production costs.