Method for improving fatigue resistance of conveyor belt for belt sintering furnace, and conveyor belt
A fatigue-resistant, conveyor belt technology, applied in conveyors, furnaces, furnace components, etc., can solve problems such as residual tensile stress, uneven heating, and lack of access to basic materials, to prevent fatigue failure, improve yield stress, The effect of prolonging fatigue life
Active Publication Date: 2017-03-08
METSO OUTOTEC (FINLAND) OY
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Problems solved by technology
In addition, residual tensile stresses are generated and the weld microstructure may not acquire the properties of the base material
[0007] The current repair method is to weld the patch onto the cracked area, but this only helps temporarily as the repair weld weakens the surrounding material and causes distortion due to uneven heating
Therefore, the conveyor belt has to be discarded and replaced, which limits the useful life of the conveyor belt
Method used
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[0035] figure 1 Part of the conveyor belt 1 of a belt sintering furnace (not shown) is shown. The conveyor belt 1 consists of a plurality of rectangular sheet steel elements 2 which are welded to one another sequentially by means of weld seams 3 .
[0036] Each rectangular steel plate element 2 comprises a plurality of holes 4 arranged in groups of perforations 5 to enable the flow of gases used in the sintering process. The configuration in which the holes 4 are arranged in groups 5 and subgroups 5' generally corresponds to the configuration disclosed in WO 2009 / 022059 A1.
[0037] Each rectangular steel plate element 2 comprises two long edges 6, 7 in the lateral direction y of the conveyor belt, said two long edges 6, 7 being parallel to each other and spaced apart from each other. The long edges of a similarly adjacent second rectangular steel plate element are connected to each long edge 6 , 7 by a weld 3 .
[0038] The two short edges 8 , 9 are in the longitudinal dir...
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The invention relates to a method for enhancing fatigue durability of a conveyor belt (1) of a strand sintering furnace, and a conveyor belt. The conveyor belt is formed from a number of rectangular steel plate elements (2) that are sequentially welded to each other by weld seams (3). Each plate element (2) includes a plurality of holes (4) arranged into a plurality of groups (5) of perforations to enable the flow-through of the gas used in the sintering process. The conveyor belt (1) is treated to create compressive residual stresses at a surface of the conveyor belt at least in critical regions which are susceptible to fatigue breakage. The conveyor belt (1) includes compressive residual stresses at a surface of the conveyor belt at least in critical regions which are susceptible to fatigue breakage. Thereby the fatigue durability of the conveyor belt is improved.
Description
technical field [0001] The invention relates to a method for increasing the fatigue resistance of a conveyor belt of a belt sintering furnace. In addition, the present invention also relates to a conveyor belt for a belt-type sintering furnace. Background technique [0002] Continuous belt sintering is used to agglomerate the pellets after pelletizing the concentrate powder, improving the strength and reactivity of the pellets. [0003] As an example of belt sintering technology, belt sintering furnaces may be mentioned, which are used for the production of ferrochromium and which are divided into several sequential zones, in each of which there are different temperature conditions . The belt sintering plant comprises a conveyor belt which is a perforated steel belt. The conveyor belt is conveyed as an endless belt around two deflection rollers. At the front end of the furnace, wet green pellets are fed onto a steel belt to form a bed of pellets. The steel belt transpor...
Claims
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IPC IPC(8): B65G15/48C21D7/04F27B21/06
CPCB65G15/48B65G2207/22B65G2207/48C21D7/04C21D10/005F27B21/06F27D2003/121C21D7/06F27B9/243
Inventor P·莱霍宁M·林德格伦
Owner METSO OUTOTEC (FINLAND) OY