First of all, 1 electrolytic worker 2 foundry worker 3 suction worker 4 purification workload decreases step by step, and so does salary. I guess you are more suitable for the latter two. Carbon is not a job, but a unit for making carbon blocks. It's dark. I hope it works for you. The working environment of aluminum factory is not good, so it is recommended to go to petrochemical and electric power departments.