Cement News tagged under: Kiln Chemistry
Changing colour30 November 2021, Published under Cement NewsBrown or yellow colours in the clinker core are indicative of unfavourable burning conditions such as reducing conditions in the kiln, according to specialists. At Tehran Cement Co, researchers have carried out a laboratory study into the effect of colour changes in the clinker core on the technical characteristics of cement. By Ali Akbar Kafash Bazari, Tehran Cement R&D Center, Iran, and Mohsen Tadayon, Iran Concrete Association, Iran. Figure 1: microscopic image of clinker with redu... |
Effects of recirculation cells in cement kilns31 August 2021, Published under Cement NewsAs the raw material passes through the cement production process, recirculation cells are created. Due to the heterogenous nature of the fine materials, the composition in each cell is not uniform and as such, recirculation cells can impact on the final product. Figure 1: example of the relationship of hotmeal LSF to clinker LSF The manufacture of Portland cement clinker is necessarily concerned with the handling of very fine grains or dusts at various stages of production. Firs... |
Dealing with dust16 February 2021, Published under Cement NewsWith dust chemistry varying between direct operation when the raw mill is out of action and indirect operation when the raw mill is running, finding a destination for baghouse dust while maintaining a homogenous kiln feed is a long-standing issue in cement production. By John Kline and Benjamin Kline, Kline Consulting LLC, USA. Figure 1: a typical raw mill and kiln feed configuration The simple question of what to do with baghouse dust when the raw mill is out of operation has p... |
Modifying the Bogue calculation31 January 2018, Published under Cement NewsThe Bogue calculation helps cement chemists to allocate the four main oxides in Portland cement clinker to the four main phases present following the pyroprocess in the cement kiln. While not perfect, it remains an effective guide to the potential relative properties of such clinkers. How much of each phase is there? The Bogue calculation is a means of allocating the four main oxides in Portland cement clinker to the four main phases present after firing in a cement kiln. The ca... |
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