Cleaning technology

Cleaning and de-oxidation

We design all our cleaning components to ensure excellent surface quality at minimum media consumption. You'll find a wealth of experience in our cleaning sections, so we can supply sophisticated components with a high level of automation. Normally, in our systems, the strip passes through spraying tanks made of stainless steel. Several nozzle tubes with clog-free, spoon-type nozzles in the closed tanks spray the cleaning medium onto both strip surfaces. It's easy to adjust the spray angle of the nozzles from the outside during the ongoing process.

You also benefit from the option of varying the cleaning agent contact time as a function of the alloy and the degree of passivation you require. This means that, when you change the process, e.g. by altering the speed, either individual nozzle tubes, nozzle tube groups, or complete sections automatically kick in or switch off. To prevent cleaning fluids dripping out of switched-off nozzles and contaminating the product, an automated shut-down program rinses the nozzles with demineralized water and dries them with compressed air in a matter of seconds. Even humidity remaining in the system is no problem. That's because the nozzles come in a special shape and with a catch mechanism that prevents any condensation from dripping onto the strip through the nozzles. This rules out surface defects caused by drops of water or other media.

Integrated in the circuit is an oil separator that continuously purifies the spent degassing solution. That ensures a longer service life of the bath. What's more, well-aimed spray-injection of a defoaming medium prevents foam generation in the cleaning bath.

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Learn about our plant technology covering the entire process chain for the production of high-quality metals.