Carbon reduction in the cement industry is difficult. How to save energy, reduce consumption and decarbonize the clinker calcination process is a key proposition for the cement industry to achieve low-carbon production. So, can industrial solid waste replace cement raw materials?
Carbon emissions in the cement industry mainly come from clinker production, whose main raw materials are limestone, sandstone, and aluminum-iron raw materials. The high-temperature decomposition of these raw materials in the pyrolysis furnace will produce a large amount of CO2, which accounts for most of the carbon emissions from cement production.
Raw material substitution technology refers to the use of carbide slag, fly ash, steel slag, calcium silicate slag, etc. to replace limestone as raw materials for cement production, thereby reducing CO2 emissions during the calcination of raw materials. Raw material substitution is the most effective low-carbon production method. Limestone will produce a large amount of CO2 in the decomposition furnace. Using calcium-rich waste to replace high-carbon-loaded raw materials such as limestone can significantly reduce CO2 emissions. The fuel substitution method serves multiple purposes, not only It can reduce carbon emissions and co-process waste and garbage.
(1). Carbide slag replacement: During the process of producing acetylene, carbide slag will produce a large amount of carbide slag waste. Carbide slag is mainly composed of 70% Ca(OH)2 and is easier to decompose than limestone.
Steel slag replacement: Steel slag is mainly composed of oxides of Ca, Mg, Fe, Si, Al and other elements, and contains most of the raw material components for cement production. If the calcareous raw materials in the raw meal are replaced, the CO2 emissions caused by the decomposition of limestone can be effectively reduced during the clinker production process.
(2). Quartz sludge replacement: Quartz sludge is the waste sludge left after crushing, washing, screening, drying and refining silicon from quartz ore mined in quartz sand plants.
(3). Papermaking sludge replacement: Papermaking sludge now contains calcium, silicon, aluminum, iron, magnesium and other elements, and has a high Al2O3 content, which can replace aluminum correction raw materials in cement production.
industrial solid waste replace cement raw materials can significantly reduce the consumption of natural mineral resources and energy. The HLM industrial solid waste vertical grinding mill produced by Guilin Hongcheng is suitable for grinding industrial solid waste such as calcium carbide slag, steel slag, papermaking white mud, etc. It provides equipment assistance for replacing cement raw materials with industrial solid waste. If you have relevant needs, Welcome to leave us a message to learn more about the equipment.