Development of composite briquettes of iron ore and coal hardened by heat treatment
| Autor: | Cesar Yuji Narita, Cyro Takano, Marcelo Breda Mourão |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Briquette
business.product_category Materials science business.industry Mechanical Engineering Metallurgy Composite number technology industry and agriculture Metals and Alloys chemistry.chemical_element engineering.material complex mixtures respiratory tract diseases Compressive strength chemistry Iron ore Mechanics of Materials Pellet Materials Chemistry engineering Die (manufacturing) Coal business Carbon |
| Zdroj: | Ironmaking & Steelmaking. 42:548-552 |
| ISSN: | 1743-2812 0301-9233 |
| Popis: | Innovative energy saving technologies have been developed to improve the efficiency of coal usage, especially in ironmaking. One of these technologies is a product known as the carbon composite iron ore hot briquette (CCB) – a self-reducing iron ore–carbon composite that uses the thermal plasticity of coking coals as a binder to enhance mechanical strength. This paper proposes an alternative method for manufacturing self-reducing briquettes which consists of pressing a mixture of the fine particles from coking coal and pellet feed iron ore in a cylindrical die followed by a heat treatment. The effects of the coal particle size, heating rate, coal/ore ratio and briquetting pressure were investigated with regard to the compressive strength and bulk density of the briquettes. Optimal results were obtained using a fine coal particle size (0.053–0.103 mm), a high heating rate, 25% coal content in the briquetting mixture, and a briquetting pressure of 53 MPa. |
| Databáze: | OpenAIRE |
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