Refractory Corrosion Comparison
Through a Rotary Drum Furnace Slag
Test for the Lead Industry
D. Fonseca, A. Spanring, F. Elias and G. Gonçalves
Abstract RHI Magnesita performs a variety of corrosion tests to simulate the operating conditions in lead smelters and compare the performance of different refractories.
In this study, six refractory grades were submitted to corrosion tests in a rotary drum
furnace using six Fe 2 O 3 –SiO 2 –CaO synthetic slags with varying contents of sodium
carbonate or anhydrous borax. This study aims to gather information about the relationship between different sodium levels in the slag and the corrosion resistance of
bricks used in the lead industry. The rebonded magnesia-chromite grade showed the
highest overall wear resistance. High sodium content in the slag (≥20% NaCO 3 or
Na 2 B 4 O 7 ) favored the corrosion of the alumina-chromia brick, while low sodium
content led to higher corrosion of the direct-bonded magnesia-chromite grades due
to increased amounts of CaO and SiO 2 in the slag. The results obtained in this study
can be used to recommend refractory grades based on the slag chemical analysis.
Keywords Refractory corrosion · Slag test · Wear mechanism
Introduction
In 1995, the global secondary lead production surpassed primary lead production,
accounting for 52.6% of the total metal production worldwide. The total lead production has doubled since 1995, reaching 11.6 million tons in 2017, 58% of which
corresponds to secondary lead [1]. Currently, more than 80% of smelted North American lead and over 60% of the lead produced in Europe comes from secondary sources
D. Fonseca (B)
RHI Magnesita, TC Leoben, Magnesitstrasse 2, Leoben, Austria
e-mail: daniela.fonseca@rhimagnesita.com
A. Spanring
RHI Magnesita, Kranichberggasse 6, 1120 Vienna, Austria
F. Elias · G. Gonçalves
RHI Magnesita, Praça Louis Ensch, Contagem 240, Brazil
© The Minerals, Metals & Materials Society 2020
A. Siegmund et al. (eds.), PbZn 2020: 9th International Symposium
on Lead and Zinc Processing, The Minerals, Metals & Materials Series,
https://doi.org/10.1007/978-3-030-37070-1_52
605
Through a Rotary Drum Furnace Slag
Test for the Lead Industry
D. Fonseca, A. Spanring, F. Elias and G. Gonçalves
Abstract RHI Magnesita performs a variety of corrosion tests to simulate the operating conditions in lead smelters and compare the performance of different refractories.
In this study, six refractory grades were submitted to corrosion tests in a rotary drum
furnace using six Fe 2 O 3 –SiO 2 –CaO synthetic slags with varying contents of sodium
carbonate or anhydrous borax. This study aims to gather information about the relationship between different sodium levels in the slag and the corrosion resistance of
bricks used in the lead industry. The rebonded magnesia-chromite grade showed the
highest overall wear resistance. High sodium content in the slag (≥20% NaCO 3 or
Na 2 B 4 O 7 ) favored the corrosion of the alumina-chromia brick, while low sodium
content led to higher corrosion of the direct-bonded magnesia-chromite grades due
to increased amounts of CaO and SiO 2 in the slag. The results obtained in this study
can be used to recommend refractory grades based on the slag chemical analysis.
Keywords Refractory corrosion · Slag test · Wear mechanism
Introduction
In 1995, the global secondary lead production surpassed primary lead production,
accounting for 52.6% of the total metal production worldwide. The total lead production has doubled since 1995, reaching 11.6 million tons in 2017, 58% of which
corresponds to secondary lead [1]. Currently, more than 80% of smelted North American lead and over 60% of the lead produced in Europe comes from secondary sources
D. Fonseca (B)
RHI Magnesita, TC Leoben, Magnesitstrasse 2, Leoben, Austria
e-mail: daniela.fonseca@rhimagnesita.com
A. Spanring
RHI Magnesita, Kranichberggasse 6, 1120 Vienna, Austria
F. Elias · G. Gonçalves
RHI Magnesita, Praça Louis Ensch, Contagem 240, Brazil
© The Minerals, Metals & Materials Society 2020
A. Siegmund et al. (eds.), PbZn 2020: 9th International Symposium
on Lead and Zinc Processing, The Minerals, Metals & Materials Series,
https://doi.org/10.1007/978-3-030-37070-1_52
605