Experimental study on ignition mechanisms of wet granulation sulfur caused by friction

Study on Friction Behavior of Ferroalloy and Wet Granulation Sulfur under Low Normal Load Conditions

“…In this high-temperature oxygen-isolating environment, iron-sulfide compounds will be generated via the reaction of sulfur and wear debris. The reaction process [5][6][7] may be expressed as Equations (14)- (17).…”

“…The scheme of the test apparatus, the test procedures, the pretreatment process of the friction specimens, and the characterization methods of the friction products can be referred in Ref. [7]. The distinction is that new test specimens with improved structure were used in this work.…”

“…The friction ignition mechanism of wet granulation was preliminary investigated in our previous work [7]. However, less attention has been paid to the friction process under low normal load conditions.…”

Ultralow Adhesion and Phase Change Behaviors of Sulfur Droplets on the Superhydrophobic Surface and Its Application in the Granulation Process

“…There are three mainstream sulfur granulation processes including rotary steel-band chilling granulation process, rotary drum granulation process, and water-cooling granulation process at present. For the rotary steel-band chilling granulation process, although it is usually considered as the best one, the product is hemispherical or flake-like with poor sphericity, and the mechanical friction which may cause dust or ignition danger is also inevitable during the process. , The rotary drum granulation process is relatively simple, but it is necessary to provide small sulfur particles as a seed crystal. Although the product obtained by the water-cooling granulation process has high sphericity, moisture entrainment is inevitable, which requires additional drying sections resulting in more energy consumption. , Therefore, it is of great significance to propose a method that can solve the problems of serious dust and poor sphericity in a non-water granulation process and avoid the underwater granulation process with high energy consumption.…”

“…For the rotary steel-band chilling granulation process, although it is usually considered as the best one, the product is hemispherical or flake-like with poor sphericity, and the mechanical friction which may cause dust or ignition danger is also inevitable during the process. 4,5 The rotary drum granulation process is relatively simple, but it is necessary to provide small sulfur particles as a seed crystal. Although the product obtained by the water-cooling granulation process has high sphericity, moisture entrainment is inevitable, which requires additional drying sections resulting in more energy consumption.…”