Author: David Thiemann

HomeArticles posted by David Thiemann

ULTRASONIC CONTINUOUS CLEANING SYSTEMS FOR WIRE ALLOY

ULTRASONIC CONTINUOUS CLEANING SYSTEMS FOR WIRE ALLOY

There are 3 methods industrial wire, rod, and bar manufacturers and producers use today for cleaning, degrading, and removing stearates, and drawings oils from the metal surface.  Electrolytic cleaning using chemicals,  Mechanical cleaning by means of shot blasting, coated abrasives, and/or abrasive brushing, and  Ultrasonic cleaning In today’s [...]
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PROCESS OPTIMIZATION: FILTRATION SYSTEMS

PROCESS OPTIMIZATION: FILTRATION SYSTEMS

Nearly every filtration system in metal strip producing lines show weak points that compromise effective filtration. As a result oil and iron fines are redeposited on the surface in closed-loop lines, alkali solutions, shorten process life due to premature media saturation. We can be really good at getting the oil, iron fines, dirt, smut, etc. […]
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Re-think Brushing – Brush Scrubbers and Satin Finishing

Re-think Brushing – Brush Scrubbers and Satin Finishing

CLEANING SECTION BRUSH SCRUBBERS AND SURFACE CLEANING & FINISHING This is a subject that many users would like to forget, rather than be reminded of! Having built cleaning section equipment for over 60 years, we have looked at many process lines and listened to scrubber issues from maintenance, operations, and quality team members and have […]
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APT MULTI-FIL BRUSHES LAST LONGER CLEANING AND FINISHING

APT MULTI-FIL BRUSHES LAST LONGER CLEANING AND FINISHING

FOR FLAT METAL STRIP, COIL, SHEET APPLICATIONS   Today’s customers want to increase cleaning and line speed in existing (or new!) cleaning equipment. And the problem is conventional cleaning sections/lines have mechanical limitations.  Current line configurations don’t have free space to add new degreasing, electrolytic or brushing units, and line [...]
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WHY STRIP CLEANLINESS IS IMPORTANT

WHY STRIP CLEANLINESS IS IMPORTANT

Steel producers, galvanizers, coil coaters, and all flat metal producers must get the strip surface clean by getting surface oils and iron fines cleaned off the strip surface. Why?  In the process of rolling metal strip, when we go from thick to thinner, narrow to wider strip, the top layer of the strip surface tears […]
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SURFACE CLEANLINESS MEASURABILITY

To begin the process of updating an existing cleaning system one would look at the efficiency of each existing section and its operating cost, as a guide for future modification or replacement.  Most of which are all offline measurements and not real-time. The easiest, quickest, and least expense method currently to implement as a measure […]
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Bi-weekly Market Update Week – February 21, 2021

Supplement HR – $1168/ton (+8) CR – $1368/ton (0) HDG – $1386/ton (+14)   Lead Times/Processed: Hot Roll Pickle/Slit – middle to end of June Galvanized wide – August Galvanized/slit – August Cold Rolled Full Hard Galvanized – August Cold Rolled Strip – Early July   Market News CRU – This week’s Supplemental price for [...]
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Surface Defects and their Control in Hot Dip Galvanized and Galvannealed Sheets

Surface Defects and their Control in Hot Dip Galvanized and Galvannealed Sheets

P. Saravanan, S Srikanth R&D Centre for Iron and Steel,Steel Authority of India Limited, Ranchi-834 002 INDIA   Abstract: Inspite of significant advancements in continuous galvanizing technology and the resulting improvements in surface quality of hot dip galvanized and galvannealed coatings, producing entirely blemish- free coatings still [...]
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WHY IS STRIP CLEANLINESS SO IMPORTANT?

WHY IS STRIP CLEANLINESS SO IMPORTANT?

Steel producers, galvanizers, and coil coaters must get the strip surface clean by getting surface oils and iron fines cleaned off the strip surface. Why?  The surface contaminants on the substrate surface cause very costly defects leading to:  quality rejects coating defects  process equipment issues on down the process line Defects on the steel [...]
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