Zinc recovery from steelmaking wastes: Recycling in HIsarna

During the production of steel, a dust waste stream is created that contains a significant amount of zinc which makes it difficult to treat and to recycle. Various furnaces have been developed that can deal with those dusts like rotary hearth furnaces and the DK process but none are fully optimal yet. HIsarna, a furnace in development by Tata...

An Overview of the Zinc Smelting Industry in the European Union

Zinc smelters in the European Union are now facing a lot of problems, especially under the attack of the Covid-19. This study reviewed the situation of the zinc smelting industry in the EU, including production methods, application of raw materials, pollution control, and waste treatment. The vast majority of smelters use hydro-metallurgical...

Zinc vapourisation from sludge wastes under thermal processing conditions: Zinc enrichment in HIsarna flue dust

HIsarna is a new furnace technology in the steel industry, featuring a large reduction of CO₂-emissions of up to 80%, and offering larger tolerances for gangue materials. Additionally, it has potential for zinc enrichment in the flue dust, as it can quickly vapourise zinc in the feed material and reject it to the flue dust. Increasing...

Unravelling the antibacterial mechanisms of silver, copper and zinc nanoparticles incorporated on titanium bone implants

Background. The past four decades, the problem of resistant bacteria has emerged. As a result of biofilm formation of (resistant) bacteria on the implant, more implant-associated infections (IAI) occurred. This has caused an increase in orthopaedic implant revisions, causing a high burden of disease. To overcome the rising problem of resistance,...

Study of Electrochemical Performance of Lithium and Zinc Metal Anodes for Rechargeable Batteries

Metal anode based batteries, considered the ideal upgrade to Lithium ion batteries in terms of energy density, are currently held back by the non-homogeneous deposition phenomenon that leads to the formation of dendrites that short circuit the cell. The solution to this problem is twofold: while it is important to come up with solutions that...

Antibacterial Surfaces Bearing Silver, Copper and Zinc Nanoparticles on Additively Manufactured Titanium Implants

BACKGROUND.Implant-associated infection (IAI) is a rising complication in bone-related medical treatments using metal implants. Preventive measures, such as implant surfaces with integrated antibacterial properties, are hence required. The emergence of antibiotic-resistant pathogens has led to a growing interest in inorganic nanoparticles as...

The delamination process of the dross build-up structure on submerged hardware in Zn-Al and Zn-Mg-Al baths: An empirical study

Hot-dip galvanizing is a well-known process to increase the corrosion resistance of steel. As a by-product dross is formed in the Zn-bath. The dross particles are composed of Fe, Al and Zn in the form of Fe2Al5Znx and interact with the hardware that is submerged in the Zn-bath and eventually accumulate on the surface of the hardware. This...

Antibacterial Surfaces Bearing Silver and Zinc Nanoparticles on Additively Manufactured Titanium Implants

The emergence of antibiotic-resistant bacteria has increased the number of implant revision procedures in the Netherlands due to implant-associated infections (IAI). Staphylococci strains accounted for more than 50% of all IAI cases. Preventative measure, such as active antibacterial surfaces on the implant, are urgently needed. This study aims...

Selective Removal of Zinc From BF High Zinc Filter Cake

At Tata Steel IJmuiden a part of the blast furnace dust is not recycled to prevent too high zinc levels in the blast furnace. Blast furnace dust is first separated from the off-gas into dry dust and sludge. The dry dust is collected in a dust bag and is directly transported to the sinyter plant. Then the sludge is separated by size through...

Processing of spinel-bearing compounds for zinc extraction

This thesis studies the zinc extraction from spinels through hydro and pyrometallurgical processing. Two zinc-bearing spinels are covered: zinc ferrite ZnO·Fe2O3 to a limited extent and gahnite ZnO·Al2O3 as the main subject, compounds which are found naturally on the Earth’s crust as well as in industrial residues from the zinc industry, steel...

Smart Processing of Brass Smelter Residues

In this study a industrial survey was performed on the secondary products generated in the Dutch metal industry. From this industrial survey it was concluded that the Dutch metal industry is already far ahead with closing the materials cycle as for almost every product is a processing route to recover its metal content. The residues generated at...

Metallurgical processing of zinc-bearing residues

In this study metallurgical processing of two different kinds of zinc-bearing residues have been performed: Zinc A and Zinc B. These residues have been stored for over 15 years in Rotterdam Harbor. The chemical compositions of the residues have been determined and showed that zinc ferrite is a major phase present. Zinc ferrite is not soluble...

The minimisation of copper losses during iron and aluminium precipitation from zinc leach liquors

The basis for this research project was that copper is lost in the Leaching Plant of the Nyrstar Budel zinc smelter. In the section of the Leaching Plant copper is lost, iron and aluminium are precipitated. Sampling of this process showed that the removal of copper from the solution is a function of pH and is mainly linked to the removal of...