Measures To Solve Common Problems Of Sinterer Trolley

2. 1 The solution of falling off grate and heat insulation pad

1) In view of the frequent falling off of grate bars, rupture of grate shanks and deformation of grate bars, this paper takes Laiwu Iron and Steel Co., Ltd as reference

In manufacturing practice [5], the grate size is adjusted.The transformed grate is shown in Fig. 1.

(1) Expand the distance of the original clamping mouth from 70 mm to 71.5 mm;

(2) In order to reduce the force deformation probability of the pallet grate, the distance between the two clamps of the grate is changed from 306 mm to 304 mm to ensure that the grate material meets the requirements;

(3) the use of precision casting, accurate size, smooth surface, do not allow cracks, sand, shrinkage and other defects;

(4) The grate material should be strictly controlled, and some new grate material should be developed and tried if conditions permit.

2) the grate loss due to heat insulation pad burning loss, and analysis of car beam loss problems found on the one hand, after five years of use car beam to a certain extent, burning, measured the average car beam loss in 1 mm or so, then through to the heat loss situation statistics found edge beam heat insulation pads fall off times greater than the middle beam pad fall off, so the heat insulation section pad size adjusted.

(1) the edge beam small heat insulation pad (three) thickness size increase 2 mm, bayonet size reduction 2 mm;The casting precision was increased from ± 1 to ± 0.5.As shown in Figure 2 and Figure 3.

(2) the middle beam heat insulation pad (a), (two), (four) thickness increase 1 mm, bayonet size reduction 1 mm;The casting precision was increased from ± 1 to ± 0.5.See Figures 4 and 5.

3) Strictly control the end temperature, must ensure that the end of the 17# bellows, the end temperature is controlled at 350 ± 50℃;Secondly, control good fuel, avoid grate, heat insulation pad appear over burning phenomenon.

4) Reasonable assembly of pallet grate. When replacing pallet grate and heat insulation pad, new and old should be installed separately to avoid falling off the new heat insulation pad and grate due to the falling off of the old grate and heat insulation pad.

5) Increase the thickness of the base material appropriately, and increase the thickness of the base material from the original 30 mm to 50 mm.The practice can protect the grate burning damage well.

2. 2 sets of wheel failure solution

Firstly, the running conditions of the wheels should be improved as much as possible. If the sintering machine runs off-track, the number of flange of the trolley should be adjusted immediately to reduce the track friction.The wheel shaft of the platform car should be replaced gradually, and the refueling hole of the newly replaced shaft should be through. A strict refueling system should be formulated. The sinterer car should be evenly divided into four production shifts according to the number of units, and the production shift should be refueled at regular time and quantitatively according to the provisions of lubrication management.

Secondly, strengthen the daily point inspection of the sintering machine wheel, found that the wheel does not rotate or lack of oil and other situations should be dealt with in time.

2. 3 The solution to the loosening and cracking of the trolley rail

(1) open expansion joints on the trolley rail plate;

(2) Regularly tighten the trolley rail bolt.

2. Solution of 4 wheel axles channeling and shedding

For single axle due to set device failure caused by the axis of emergence, and so on and so forth, on the shaft of the original set screw hole (Φ 15 mm to 4 mm deep) instead of the longitudinal slot set (20 mm long 40 mm width 15 mm deep), as shown in figure 6, 7, and such when installed on the axle hole and shaft sleeve hole concentricity requirement becomes low, even a slight dislocation, as long as the axis of figure 7 sets of car wheels in length direction shaft after transforming installed in place will not affect the bolt set function.After the modification, the use effect is good, and the withdrawal of the platform axle is obviously reduced.

2. 5 Sealing slider falling off solution

First of all, regularly check the wear of the guide plate at the entrance of the sintering machine slide, and mark the lowest wear scale on the guide plate;Replace or repair the guide plate before it is worn to the lowest scale.

Secondly, check the replacement of the spare trolley seal slider, tighten or replace the loose and worn seal slider;Use the downtime to check the online trolley seal slider, tighten the bolt loose seal slider, and replace the seal slider with serious wear or deformation, grooves and burrs on the surface wear.