Method for processing zinc wet smelting slag by use of warm slag side blowing reducing furnace

The invention relates to a method for processing zinc wet smelting slag by use of a warm slag side blowing reducing furnace, and belongs to the technical field of thermometallurgy. The method includes the following steps: 1) 70-90 t of hot lead-rich slag are added into a reducing furnace, 1-3 t of wet zinc slag, 1.5-2.5 t of limestone, 3-4 t of iron calcine, 2-3 t of coke block, and 0.8-1.6 t of fracture of coal are added per hour; 2) in the process of adding of the lead-rich slag, syphonic mouth lead liquid height rises to flowing lead liquid height, and then lead is discharged for ingot casting work; 3) 2-7 t of zinc calcine, 2.2-3.5 t of limestone, 3-6 t of iron calcine, 2-3.5 t of coke block, and 2.5-4 t of fracture of coal are added per each furnace, the coal gas flow rate is controlled at 3200-3600 Nm3 / h, oxygen flow rate is controlled at 950-1200 Nm3 / h, the molten pool temperature is at 1100-1300 DEG C, the in-furnace negative pressure is-20 to-40 pa; 4) after the addition of the lead rich slag is completed, the fracture of coal is continuously added in 1-2 h at 1000-1250 DEG C, lead content in the molten slag is judged to be 2.2% or less, after 0.5 h of temperature rising, slag discharge operation is performed; and 5) in the process of smelting, after waste heat recovery and dust collecting of flue gas, the flue gas is sent to a desulfurization system. The method has the characteristics of simple process, low production cost, effective solving of repertory occupation of acid leaching slag heaps, improvement of the recovery of valuable metals, and the like.