Depending on the quality of the final bitumen, the polymer used and the desired concentration of the product, an installation capacity of up to 60 tons/hour can be achieved.
The volume of products involved in the mixing process inside the bitumen modification plant, including the internal pipelines of the plant, is 70 m3.
The operation of the unit is based on the supply of bitumen heated to the design temperature under pressure into the mixing reactor with the simultaneous supply of polymer components. After mixing the components, the material is fed into the colloid mill and returned back, where PMB is obtained as a result of a physicochemical reaction. After cooking, the finished product (PMB) is served into the storage tank.
The modular steel structure consists of block containers with high-quality equipment from European manufacturers and includes: a SBS polymer supply unit, a granulated sulfur supply unit and two mixing reactors with pipelines.
The plant has two mixing reactors, each with a volume of 30 m3. The bitumen is sent from the storage tanks to one of the mixers of the modified bitumen plant. In the mixer, the initial bitumen is mixed with a plasticizer (if necessary), polymer chips (acting as a modifier) and an adhesive additive. After the mixing process, the mixture is pumped through the colloid mill to the second mixer. During the mixing of the next batch in the first mixer, the previous batch is repeatedly run through a colloid mill, where the components are crushed and the mixture is homogenized, and then returned to the second mixer. Also at this stage, granulated sulfur is fed into the mixer, preventing the subsequent separation of the components. Next, the finished product enters one of the free storage tanks or loading into tank trucks.
The built-in automatic control system registers data on the technological process of bitumen modification, including the following parameters: temperature, product weight in the mixing reactor, mass flow, operation time. All transactions are recorded and archived.
The multi-pass plant provides for the use of styrene-butadiene-styrene (SBS) polymers, almost all known polymer modifiers, including crumb rubber. It is possible to use special additives, such as sulfur.