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This post was last edited by Black gold on 2012-4-13 at 15:38. The 3500 mixer is equipment introduced by Hefei Carbon Factory from Clöckner Humboldt Wedag Company. The machine has an effective volume of 3500 L and is heated using hot kerosene; its operating pressure is 60 kPa. The discharge port of the kneader is equipped with a sliding door that moves axially via hydraulics. It mainly consists of the kneader tank, hydraulic system, dust collector, fan, and electric control valves. The main components of the kneader consist of a base, a pot body, a bottom sliding door, an agitator blade, a lid, a drive mechanism, as well as a heating and temperature measurement system. (1) Base: The base of this machine is made of steel structure, used to install the pot body and the driving mechanism. (2) Kneading pot body: The pot body of this machine is made by welding steel plates; it consists of two side panels, a middle pot body, and a lid. To compensate for thermal stress, the front and rear side plates are mounted on the frame via movable bearings; there is a discharge port for the mixer at the \"back\" of the middle tank body, while the lid is equipped with a feed port as well as pipe connections for the dust collector and asphalt pipelines. A wear-resistant lining plate is installed inside the pot, and the lining plate is fixed using clamping strips. To improve heat transfer between the boiler body and the wear-resistant lining, a thermal conductive paste with a thickness of 2–3 mm is applied between them. This thermal conductive paste is an inorganic material with excellent thermal conductivity. The maximum temperature reaches 400°C, while the minimum temperature is -200°C. (3) To facilitate the replacement of the wear-resistant lining on the inner wall of the mixer, the cover is connected to the machine body via hinges at its open end. For safety reasons, the lid is equipped with an electrical interlock; it can only be opened when the mixer motor stops operating. (4) Bottom sliding door: The bottom sliding door is the discharge port of the kneader. The sliding door is installed longitudinally along the body of the pot on its \"back\", matching the shape of the pot. It is driven hydraulically and moves along rod-type guides. Sealing between the sliding door and the pot is achieved through a wedge element that is braked by a thrust roller; when opened, the sliding door descends by imm, and the surface of the sliding door is cleaned by elastic seals located on the side panels. (5) Stirrers: The machine is equipped with two ∑-shaped stirrers made of special steel, which rotate towards each other at different speeds; the two shaft ends are fixed to the side of the machine body using slip keys. (6) The two mixing blades of the drive device mixer are each driven by motors with different power levels, via reduction gears. (7) Heating and temperature measurement: The heating of this machine is achieved using hot kerosene in an annular tube. The annular tube is welded to the outer plate of the mixer and is divided into four sections, which are controlled by valves. The bottom slide door is connected to the heating system via a metal hose, and the sealing of the flanges is achieved using aluminum seals with special surface designs. Temperature measurement in the kneader is carried out using a sensing probe installed on the low-speed shaft. To protect the measuring probe, a highly wear-resistant protective sleeve is used at its tip. Fixing measures are taken to prevent the protective cover from twisting. Thermal conductive paste is used between the probe tip and the protective sleeve to ensure reliable heat transfer.