A Brief Discussion on the Transformation of the Track Foundation of Coke Pushing and Quenching Cars in Coking Plant
track foundation
Since the Wing Steel Coking Plant was put into operation, especially in the last three years, the track of the quenching car has been broken, the track pressure plate screw is loose, the track backing plate is open and welded and deformed, the track bed is seriously damaged, the track is uneven, the track spacing is different, and the track phenomena such as deformation and track drop have always been a major bottleneck problem restricting production, affecting the safe production of coke quenching vehicles, often causing track breakage and deformation of the grinding track carriage, serious wear of the travelling wheels, and large vehicle body shaking.
1. Cause analysis
After reviewing the drawings and long-term on-site observation, the company’s equipment management personnel found that the main reasons were that the track was not fixed firmly, the foundation was loose, the track was soaked in quenching water for a long time, the track foundation was severely corroded and partially subsided, and the bolts were loose, uneven, and bent, causing the coke quenching car to shake seriously during operation; if not dealt with in time, it may cause serious losses.
2. Reconstruction plan for coke pushing and coke quenching car track foundation
The existing single concrete foundation is transformed into an integral foundation of cast-in-place reinforced concrete, and long sleepers are used instead of short sleepers.
In order to prevent the corrosion of the bolts of the rail pressing parts, the pre-embedded bolts fixing the rails are changed to M24 stainless steel bolts, a 16 mm thick steel plate is installed under the rails, and a shock-absorbing rubber pad is added under the steel backing plate to increase the elasticity of the rails.
Bolts, nuts, and gaskets are made of stainless steel, and the 50kg heavy rail is changed to Qu100 crane rail, which increases the contact area between the wheel and the rail surface, reduces wear, and increases friction, and adopts the “aluminium heat method” (the aluminium heat method is a kind of method of obtaining high melting point metal elemental substance by using the reduction of aluminium).
It can be simply considered as the reaction between aluminium and certain metal oxides (such as Fe₂O₃, Fe₃O₄, Cr₂O₃, V₂O₅, etc.) under high heat conditions.
A thermite reaction is often used in smelting the high melting point of the metal, and it is an exothermic reaction in which the magnesium strip is the igniter and potassium chlorate is the combustion aid.
Magnesium strips can burn in the air, and oxygen is the oxidant. But when part of the magnesium strip inserted into the mixture burns, potassium chlorate is an oxidant to ensure the continued combustion of magnesium strips, while releasing enough heat to trigger the reaction of iron oxide and aluminium powder.
Welding the track joints, thus solving the problems of the bottom sinking and bending of the joints when the coke quenching car is running, and the impact of vibration and sound.
