Used lead-acid batteries generally come from scrapped automobiles and electric bicycles. Depending on structural differences and applications, lead-acid batteries can be classified into starting (flooded) lead-acid batteries, motive (starved electrolyte) lead-acid batteries, and other types. Waste lead-acid batteries contain 24% to 30% (by mass) of lead alloy grids, terminals, and other alloy components. The refining of grids adopts an alkaline pyrometallurgical refining process. The pyrometallurgical refining workshop is equipped with refining pots, using negative pressure operation and indirect heating methods; refining is carried out under negative pressure conditions. After smelting, the grid enters the refined lead pot in the pyrometallurgical refining workshop, and under conditions of 420-450℃, a small amount of NaOH and sodium nitrate refining agents are added to remove impurities, producing refined lead. This dataset applies to the refining process of grids from waste lead-acid batteries.