Rezinal, a trendsetter in sustainable recycling of zinc ashes

About us

Rezinal nv from Belgium is the trendsetter in sustainable recycling of zinc ashes (zinc skimmings) from the hot-dip galvanising process and other zinc-containing materials. The name Rezinal originates from the abbreviation of its manufacturing purpose: REcycling, ZINc metal and ALloys.

Rezinal is the architect and world leader in zinc recycling; it transforms crude zinc skimmings from hot-dip galvanizers into high-quality secondary zinc metal. The secondary zinc and by-products are used in high-value applications, such as hot-dip galvanising, brass production, and zinc oxide production.

Rezinal has its industrial operations in Zolder, Belgium and serves a global worldwide customer base.

Today, with a licensed capacity of 60,000 mt of zinc ashes (zinc skimmings) per annum, Rezinal is Europe's largest secondary zinc producer and one of the leading producers in the world.

Rezinal dedicates most of its R&D efforts to producing secondary zinc metal using the best available clean zinc recycling technologies. The state-of-the-art manufacturing technology is designed to contribute to the eco-friendly way of life. This keeps the zinc processing industries’ chain closed and future generations do not lose any valuable raw materials: an important contribution to a better environment and a greener future.

Zinc Recycling of Ashes (Skimmings) & Bottom Dross

Zinc ashes/skimmings

Hot-dip galvanising is a process that helps protect steel objects against corrosion. During galvanising, the steel objects acquire a protective zinc coating that renders them corrosion resistant. The galvaniser immerses pre-treated steel objects ​​in liquid zinc, at a temperature of about 450 degrees Celsius. The zinc reacts with the steel, thereby forming a protective coating. After galvanising, crude zinc ashes appear as a thin layer on the surface of the galvanising bath. These are removed after each cycle.

Among other things, we process zinc ashes received from hot-dip galvanising (construction), zinc-coating of wires and pipes, and zinc smelting residues. An ecological solution, since it keeps the chain closed, and zinc ashes are converted into valuable raw materials.

Zinc bottom dross

Zinc bottom dross is a by-product generated during the hot-dip galvanising of steel. The liquid zinc reacts with the steel, thereby generating zinc bottom dross and zinc ashes (zinc skimmings). The zinc bottom dross - an alloy of iron and zinc – is deposited on the bottom of the galvanising bath, and is regularly removed. Rezinal is a major player in the zinc bottom dross market and upgrades zinc bottom dross into new raw materials for the zinc-processing industry.

Secondary Zinc Metal

The hot-dip galvanising industry is not only a supplier to Rezinal, but is also our largest market. We supply quality products such as zinc metal, zinc alloys and intermediates. For hot-dip galvanising companies, Rezinal is a guarantee that zinc residues will be processed in a legal and sustainable manner and appropriately valued. Rezinal provides a comprehensive service so that companies can focus on their core business.

Rezinal zinc metal

Rezinal recycles zinc ashes into zinc metal in two different qualities for the hot-dip galvanising industry: Rezinal® 1 (min. 98.5 % Zn quality) and Rezinal® 4 (min. 99.7 % Zn – low lead quality). Rezinal offers the most suitable quality, according to the galvanizer's bath composition and application.

Benefits of Rezinal zinc:

  • available in blocks of 25 kg (1 ton bundle) and jumbo blocks of 1 ton;
  • ecological: Rezinal tries to find the most ecological production technology. Thus, the energy and water consumption during zinc recycling is significantly lower than when manufacturing primary zinc from ores. Rezinal also wishes to set good example in terms of CO2 emissions. Rezinal’s zinc metal has a carbon footprint per kg of zinc of just 0,15 kg, a fraction of the global industry average estimated at 3,96 CO2/kg for refined SHG zinc from ores. The result is a more sustainable zinc metal with one of the world’s lowest carbon footprint to date. Rezinal is now aiming to further reduce its carbon emissions all the way to net zero.
  • it is more economical than primary zinc manufactured from ores.



An accurate knowledge of the composition of the galvanising bath is crucial for every galvanising company. Rezinal is aware of this, and offers its partners a full galvanising bath analysis. The galvanising bath analysis is highly accurate and is done using the wet chemical method (ICP - Inductively Coupled Plasma), so that hot-dip galvanising companies can maintain the composition of the zinc bath at an optimal level.

Rezinal also analyses all the raw materials and finished products supplied. This is the only way in which our company can guarantee the correct valuation of the raw materials supplied and the quality of our products.


The transport and logistics of zinc is subject to a variety of stringent laws and regulations. Rezinal specialises in recycling zinc scrap and zinc ashes (zinc skimmings) into zinc metal and is therefore very well placed to make appropriate logistical arrangements for you. Apart from our wide experience and expertise in transport and logistics, we also provide bins to galvanising companies.

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