Treatment of material leakage of the hottest cylin

2022-08-08
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Leakage treatment of cylinder mixer

there is a large area of leakage at the feed end of the primary mixer feeding the sintering machine, with an average of more than 300 tons of leakage per day. In order to prevent the mixture from leaking into the tire base of the mixer, the material must be removed manually. Meanwhile, the leaked mixture occupies the safe passage of the primary mixing platform. The mixture leaked to the ground will seriously affect the surrounding environment

according to the space position of the three-way hopper at the feeding end of the primary mixer, a chute is installed below it, the mixture leaked from the feeding end is led into the three-way hopper through the chute, and then transferred to the secondary mixer through the newly added 650mm belt conveyor, and the leaked mixture is transported to the sintering machine again

1. Add chute

the chute is fixed on the steel structure support of the tee funnel. One end is under the newly welded feed inlet at the feed end of the mixer. The purpose of adding the feed inlet is to introduce the leaked mixture into the newly added chute, so as to avoid leaking into the tire base and accelerate the wear of the tire. Although the other end is connected with the tee funnel, considering that the location of the tee funnel is far away from the newly added belt conveyor, and the mixture can not flow smoothly into the newly added belt conveyor, a small chute is designed under the newly added chute according to the site spatial location to make the antirust oil play its due role, and a 400mm slot is chiseled out of the first mixing platform × 400mm square hole, install a funnel to lead the leaked mixture to the new belt conveyor

2. New belt conveyor

due to the different lengths of the new 1 and 2 belt conveyors under the primary mixer, the positions of the two tee funnels are staggered by about 2m. Therefore, the reserve center line of the new belt conveyor has been proved, so it has to be arranged in parallel with the center line of the two tee funnels. The center distance between the driving and driven pulleys of the belt conveyor is 8.3m, the power of the electric pulley is 3KW, the belt speed is 1.25m/s, and the belt width is 650mm

3. After several months' observation, it is found that the thickness of the adhesive material in the cylinder of the primary mixer is related to the position of the water adding point and the water amount of the water adding pipe. The thickness of the adhesive around the water adding point is small, while the thickness of the adhesive around the water adding point is large, and the filling rate seriously exceeds the standard. The thickness of the adhesive on the north side is relatively small because enough water can be added

in addition, in the process operation, it is required to do a good job in the digestion of lime under the sintering ingredients, and add enough water to fully digest the lime into a paste in the digester. It is observed that the sticking thickness of the outer cylinder of the primary mixer is evenly distributed along the length of the mixer except around the feed inlet, and the thickness is ≤ l00mm, which indicates that the water adding point and amount at the south end of the mixer have a great impact on the sticking thickness

after studying the above situation, lengthen the original water adding pipe so that water adding points can be arranged along the length of the whole cylinder. At the same time, a water adding pipe is added to solve the problem of insufficient water at the south end of the mixer. When the mixture enters the cylinder of the primary mixer, water can be added, so that the water can be added evenly along the length of the whole mixer, and the sticking phenomenon is greatly reduced

4. Sealing problem

a ring of sealing plate is welded on the tee funnel at the feeding end of the primary mixer. There is a gap between it and the sealing belt between the feeding port of the primary mixer. The maximum gap exceeds 50mm. Trim the gap to about 5mm. After running for a period of time, due to the wear of the mixture, the gap will increase again. Each time the machine is shut down for maintenance, the sealing plate shall be replaced or welded in time. During the experiment of the real-time data collection and testing system, the friction force is transmitted to the pressure sensor through the lever to ensure that the gap is about 5mm. This improvement is very effective in reducing the amount of material leakage

5. Effect

after improvement, the use in recent two years has proved that the primary cylinder mixer operates stably, and the mixing effect drop hammer impact tester is applicable to various pipes (PVC-U water supply pipe, sewage pipe, low-pressure water supply pipe, low-pressure water supply pipe, core foam pipe, double wall corrugated pipe, PE water supply pipe) and plates. The measurement results of external impact resistance have been improved, and the leakage at the feeding end has been greatly reduced

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