Abstract:
The article discusses the scheme of preparation of highly concentrated water-coal suspensions for the combustion
of water-coal fuel. While, experimental studies were carried out on grinding coal and selecting organic
compounds. Nowadays, many variants of technological schemes for the preparation of highly concentrated
water-coal suspensions are known and tested in our country and as abroad. The choice of a rational technological
scheme of preparation depends on many factors as the properties and quality of the feedstock, the required
quality of the suspension, and the type of additives used in the process, economic opportunities, etc.
In order to select the most effective plasticizers for water-coal suspensions prepared from coal
slimes, the effect of plasticizers has been studied. These reagents meet the requirements for plasticizer
reagents and are readily available. The effectiveness of these additives is due to their physicochemical
properties, a feature of their structure, consisting of hydrocarbon, aromatic, carboxyl,
hydroxyl and other groups. We obtained the dependence of the height of the dispersed phase layer
on the time of the presence of the suspension with the addition of gelatin, fuel oil, lignosulfonate
(LST), sodium humate. Suspensions with the addition of sodium humate have the best stability.
As a result of the analysis of experimental studies, it has been established that the humic additive
with content of the order of 1 % is the optimal binder reagent from the used (fuel oil, humic acid,
gelatin).
