2026 年 3 月 19 日

As aluminum plants push for higher productivity and lower operating costs, the molds used to cast aluminum into sows and ingots face increasingly demanding conditions. A sow mold endures repeated thermal cycling — molten aluminum poured in at temperatures above 660°C, then cooled and released — and any material that cannot withstand this stress fails prematurely. Thermal shock resistant molds address this challenge directly, offering longer service life, more consistent cast quality, and a lower total cost of ownership that makes them the clear direction for modern aluminum smelters worldwide. What Makes Thermal Shock Resistance So Critical for Sow Molds? Every time molten aluminum is poured into a sow mold for aluminum, the mold surface absorbs an intense thermal load and then contracts as the aluminum solidifies and is released. In high-volume primary and secondary aluminum plants, this cycle repeats continuously across shifts, and ordinary cast steel molds accumulate micro-cracks o

When comparing dross press machine options against traditional dross handling methods, the core difference comes down to how quickly oxidation is stopped and how consistently aluminum is recovered. Modern dross press equipment acts immediately after skimming compressing hot dross within minutes, cutting off air contact, and completing the full cycle in approximately 10 minutes. Traditional approaches like relying solely on rotary furnaces introduce delays that cost aluminum plants measurable recovery value. Why Traditional Dross Handling Falls Short In many primary and secondary aluminum plants, hot dross skimmed from the furnace at 700–800°C has historically been directed straight into a rotary furnace for processing. While rotary furnaces remain a legitimate downstream option, using them as the first point of contact with hot dross creates an unavoidable problem: the dross continues oxidizing throughout the handling and charging period. Dross is a mixture of molten aluminum, salts,