Silicon steel sulfuric acid refining system cleaning process
A technology of silicon steel acid and process, which is applied in the field of cleaning process of cold-rolled silicon steel pickling system, can solve the problems of limited processing capacity, secondary pollution and blockage of sewage discharge system, and achieve the effect of improving operation reliability and reducing waste liquid discharge
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[0028] see figure 1 A silicon steel pickling system cleaning process is a supplement to the circulation system of the existing pickling process section, and uses hot sodium hydroxide solution to clean the heater or the entire system.
[0029] The cleaning process for the pickling system is:
[0030] Step 1, stop the unit;
[0031] Step 2, the acid in the acid tank is returned to the acid tank after shutdown;
[0032] Step 3, use the unit circulating pump 8 to transport the acid in the acid tank to the settling tank, and when the liquid level in the acid tank drops to the minimum alarm level of the pump operation, stop the pump and discharge the residual acid directly to the ditch;
[0033] Step 4, after the remaining acid is emptied, close all the evacuation valves;
[0034] Step 5, open the valve of the acid tank to supplement the industrial water, and when the liquid level reaches 40%, start the pump 6 of the original solution of the lye supplement, and calculate the supp...
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