Complete Bitumen Emulsion Manufacturing Process
Posted by Metal Barrier on December 22nd, 2017
Bitumen emulsion is a diffusion of small drops of bitumen in water.Bitumen emulsion comprises three basic ingredients; bitumen, water and an emulsifying agent. Based on condition it may contain other additives, such as stabilizers, coating improvers, antistripping or break control additives. It is well recognized that water and bitumen will not mix, apart from carefully controlled conditions, using highly dedicated equipment and chemical additives.
Process of Bitumen Emulsion
Bitumen emulsions are equipped with the KLM colloid mill. The mix of hot bitumen and water phase passes between the rotor and the stator. Both parts have a composite relief to create supplementary turbulence. The following types of units for bitumen emulsion manufacturing are accessible today, batch and stable.
The bitumen emulsion manufacturing process consists of two stages: first, grounding of the water phase, and then emulsion production. The water phase is equipped with a special tank with water, emulsifier, acid (or alkali) and other additives. The answer is carefully mixed. When the emulsion is formed, the pre-mixed water phase is inserted into the bitumen.
In the batch process, the manufacturing involves a few components and can be controlled by hand. Quality of the emulsion is distinct by the accuracy of component dosage. Hence the need to mechanize the process.
The need for closed measure system is uttered by the environmental and health hazards of the chemicals concerned.
The incessant procedure absorbs heating of water and amount of all machinery incessantly by a separate pump for each of the components. Consumption tanks are not necessary. This process requires automation with accurate control of material dosage, apart from acid, which is dosed based on the suggestion of the water phase pH meter.
The UVB-2 plants allow alteration of bitumen emulsions by a variety of polymers, such as latex, and SBS. During emulsification. bitumen is atomized into the microscopic particle that is prone to coalesce. Good emulsion necessitates correct submission of mechanical energy to lessen the size of bitumen particles and avoid their coalescence after dispersion.
The size of the particles is distinct from the colloid mill, the period of the component’s attendance in the mill, attentiveness, and type of emulsifier and the warmth of the emulsification.
The viscosity of bitumen during emulsification should not go beyond 500 cSt. If this parameter is not met, bitumen must be impassioned before entering the mill.
The water phase may also be heated for a better explanation of surfactants to 30-70ºС. The precise procedure of emulsifier stabilization is distinct by the hydrophilic nature of the surfactant. If the emulsifier contains a large hydrophilic group, coagulation of bitumen particle may be prevented.
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About the AuthorMetal Barrier
Joined: July 21st, 2017
Articles Posted: 18
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