Control method for preventing furnace bottom hardening of acid regeneration roasting furnace

Abstract

The invention discloses a control method for preventing furnace bottom hardening of an acid regeneration roasting furnace. The control method comprises the following steps that 1) when the fluidized bed acid regeneration roasting furnace conducts production, the furnace pressure, the furnace temperature, the acid gun flow, the opening amount of a gas valve and the operation frequency of a spiral conveyor are monitored in real time; 2) under the conditions that the furnace temperature is in an abnormal state and the waste acid flow is not changed, the gas amount is adjusted; 3) when the furnace temperature is in a normal state, the waste acid flow is increased to control the furnace temperature; 4) when the furnace pressure is increased, if the furnace pressure value is higher than a range value, a signal is given to the spiral conveyor, and the operation frequency of the spiral conveyor is increased to 85% or above from the normal operation frequency 65%; and 5) discharging is stopped after the furnace pressure value is carefully observed to be within the normal range, and the operation frequency of the spiral conveyor is recovered to 65%. According to the control method for preventing furnace bottom hardening of the acid regeneration roasting furnace, the production benefits are maximized, the situation that the production plan is affected after the fault occurs emergently, and consequently main line production is affected is avoided, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a control method for preventing hardening of the furnace bottom of an acid regeneration roasting furnace. Background technique [0002] The concentrated waste acid solution (ferrous chloride) processed by the acid regeneration roaster is injected into the furnace through the acid gun on the side of the lower furnace body. During the production period, the furnace temperature and furnace pressure fluctuate. If the corresponding changes are not made in time, It will cause uneven heating, and agglomeration is easy to appear at the bottom of the roasting furnace. If no adjustment is made for a long time, the agglomeration will change from small to large, causing partial blockage of the burner at the bottom of the furnace, and the iron oxide powder solidifies in pieces. In severe cases, the entire furnace The bottom is all lumpy. [0003] Generally, when the hardening phenomenon u...

AI Technical Summary

Problems solved by technology

[0002] The concentrated waste acid solution (ferrous chloride) processed by the acid regeneration roaster is injected into the furnace through the acid gun on the side of the lower furnace body. During the production period, the furnace temperature and furnace pressure fluctuate. If the corresponding changes are not made in time, It will cause uneven heating, and agglomeration is easy to appear at the bottom of the roasting furnace. If no adjustment is made for a long time, the agglomeration will change from small to large, causing partial blockage of the burner at the bottom of the furnace, and the iron oxide powder solidifies in pieces. In severe cases, the entire furnace Bottom all lumpy

[0003] Generally, when the hardening phenomenon usually occurs in the acid regenerative roaster, it can only continue to be produced by destroying and removing the refilling in the standby state; downtime

[0004] In summary, acid regeneration roasting furnaces have high safety risks and high energy waste due to the failure to adjust the waste acid flow, gas volume, and air volume in time due to changes in furnace temperature and furnace pressure, which seriously affect acid regeneration. Unit Efficiency and Efficiency for Subsequent Resumption of Production

Images