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  2. Underground mine ventilation - Wikipedia

    en.wikipedia.org/wiki/Underground_mine_ventilation

    In addition to air quality, tunnel ventilation plays a key role in temperature regulation. Heat generated by mining equipment and geological factors can make underground conditions extremely hot. Effective ventilation helps to maintain a more manageable temperature, enabling miners to work in safer, more comfortable conditions.

  3. Thermite - Wikipedia

    en.wikipedia.org/wiki/Thermite

    Although the reactants are stable at room temperature, they burn with an extremely intense exothermic reaction when they are heated to ignition temperature. The products emerge as liquids due to the high temperatures reached (up to 2500 °C (4532°F) with iron(III) oxide)—although the actual temperature reached depends on how quickly heat can ...

  4. Mine rescue chamber - Wikipedia

    en.wikipedia.org/wiki/Mine_Rescue_Chamber

    Refuge chambers come in multiple types and models, and are used in multiple industries including metalliferous mining, coal, tunnelling and petrochemical facilities. In emergencies, when evacuation is no-longer safe or practical, the rescue chamber is designed to provide a safe and secure ‘go-to’ area for personnel to gather and await ...

  5. Carbon dioxide - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide

    At a pressure of 1 atm (0.101325 MPa), the gas deposits directly to a solid at temperatures below 194.6855(30) K [2] (−78.4645(30) °C) and the solid sublimes directly to a gas above this temperature. In its solid state, carbon dioxide is commonly called dry ice. Pressure–temperature phase diagram of carbon dioxide. Note that it is a log ...

  6. Coal gasification - Wikipedia

    en.wikipedia.org/wiki/Coal_gasification

    In industrial chemistry, coal gasification is the process of producing syngas—a mixture consisting primarily of carbon monoxide (CO), hydrogen (H 2), carbon dioxide (CO 2), methane (CH 4), and water vapour (H 2 O)—from coal and water, air and/or oxygen.

  7. Calcination - Wikipedia

    en.wikipedia.org/wiki/Calcination

    At room temperature, tin is quite resistant to the impact of air or water, as a thin oxide film forms on the surface of the metal. In air, tin starts to oxidize at a temperature of over 150 °C: Sn + O 2 → SnO 2. [6] Antoine Lavoisier explored this experiment with similar results time later. [7]

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    mail.aol.com

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  9. Pyrometallurgy - Wikipedia

    en.wikipedia.org/wiki/Pyrometallurgy

    The most common example of roasting is the oxidation of metal sulfide ores. The metal sulfide is heated in the presence of air to a temperature that allows the oxygen in the air to react with the sulfide to form sulfur dioxide gas and solid metal oxide. The solid product from roasting is often called "calcine".