Refractory concrete as an alternative technology briquetting of powders and chrome concentrate
DOI:
https://doi.org/10.55312/op.vi2.4639Abstract
The purpose of this study is to recommend refractory concrete technology as an alternative method for briquetting powders and chromium concentrates in our country. The extraction of chrome ore from the mines is accompanied by year to year with the increase of the amount of powders with 28-34% chromium oxide content. On the other hand, the enrichment of “poor” chromium minerals with 38-42% Cr2O3 content has caused the amount of chromium powder concentrate to reach significant figures. Given the technological requirements of the Ferrochrome Plant in Albania with a production of about 200000 t/year; in which mainly chromium-based grain is used, we have undertaken a study on the possibility of using chromium minerals in powder or powder concentrate with 28 to 42% Cr2O3 content in the form of briquettes, namely the return of chromium minerals from the condition granular powder by bonding with glass-water, Na2SiO3. This technique is realized using refractory concrete technology [2]. as one of the alternative methods of briquetting. The study was also accompanied by experimental data obtained during the physical, mechanical and thermal testing of briquettes produced at a temperature of 300-400°C on a laboratory and semi-experimental scale.Keywords:
powder and chromium concentrate, ferrochrome, refractory concrete, briquetting.Downloads
References
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C. R. Ray, P. K. Sahao and S. S. Raho” Strength of Chromate briquettes chrome/ferrochrome”. INFACON IX,2007. Në: https://www.researchgate.n e t / p u b l i c a t i o n / 2 3 8 7 4 6 0 0 8 _S T R E N G T H _ O F _ C H R O M I T E _BRIQUETTES_AND_ITS_EFFECT_
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ON_SMELTING_OF_CHARGE_CHROME_FERRO_CHROME
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Thomas By “Briquetting of Manganese Oxide Fines with Organic Binders”, Norwegian University of Science and Technology, 2017, p. 9-24.
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Petzold A, Rohrs. M, “Concrete for high temperatures”. Publisher: Maclaren and Sons, GB London:1970, p. 43-44.
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Kadiu. F,” Betonet zjarrduruese dhe kundra acide për mbrojtjen e rezervuarëve të acidit sulfurik në Laç”, Instituti i Studimeve Teknologjike në Ndërtim, Tiranë, 1975.
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Kadiu. F, Projektimi dhe prodhimi i betoneve të lehta refraktare, Instituti i Studimeve Teknologjike në Ndërtim, Tiranë, 1990.
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Rajan Sen, M.K Mitra, Siddhartha Mukherjee, Rajib Day. “Effect of Grading of Chromites ores on the Quality of Briquettes” ISIJ International, Vol. 50(2010), Nr. 2. p. 200-206.
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N. R. Shoko and N. N. Malila “briquetted Chrome ore fines utilisation in ferrochrome production at Zimbabwe alloys”, Proceedings: Tenth International Ferroalloys Congress; 1-4 February 2004, Cape Town, South Africa, p. 291- 299.
References
C. R. Ray, P. K. Sahao and S. S. Raho” Strength of Chromate briquettes chrome/ferrochrome”. INFACON IX,2007. Në: https://www.researchgate.n e t / p u b l i c a t i o n / 2 3 8 7 4 6 0 0 8 _S T R E N G T H _ O F _ C H R O M I T E _BRIQUETTES_AND_ITS_EFFECT_
ON_SMELTING_OF_CHARGE_CHROME_FERRO_CHROME
Thomas By “Briquetting of Manganese Oxide Fines with Organic Binders”, Norwegian University of Science and Technology, 2017, p. 9-24.
Petzold A, Rohrs. M, “Concrete for high temperatures”. Publisher: Maclaren and Sons, GB London:1970, p. 43-44.
Kadiu. F,” Betonet zjarrduruese dhe kundra acide për mbrojtjen e rezervuarëve të acidit sulfurik në Laç”, Instituti i Studimeve Teknologjike në Ndërtim, Tiranë, 1975.
Kadiu. F, Projektimi dhe prodhimi i betoneve të lehta refraktare, Instituti i Studimeve Teknologjike në Ndërtim, Tiranë, 1990.
Rajan Sen, M.K Mitra, Siddhartha Mukherjee, Rajib Day. “Effect of Grading of Chromites ores on the Quality of Briquettes” ISIJ International, Vol. 50(2010), Nr. 2. p. 200-206.
N. R. Shoko and N. N. Malila “briquetted Chrome ore fines utilisation in ferrochrome production at Zimbabwe alloys”, Proceedings: Tenth International Ferroalloys Congress; 1-4 February 2004, Cape Town, South Africa, p. 291- 299.
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