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| rotary kiln |
Quality assurance, we must first find the cause of the problem gears, after analysis, produce large gear machining casting internal defects, including strand solidification and heat transfer, mass transfer and stress the role of generating mechanism is extremely complex. To conclude, the slab is affected by internal defects in the secondary cooling zone slab solidification process control. As much as to say, a good grasp of the secondary cooling zone strand solidification process, ensures that the kiln gear quality.
1, the control slab structure
The first is to expand the center equiaxed grain zone, control the growth of columnar crystals, so reduce the center segregation and center porosity. For this reason, the use of low superheat pouring molten steel, electromagnetic stirring techniques are effective methods to expand the area of crystal axis.
2, a reasonable secondary cooling system
In the secondary cooling zone, the billet surface temperature distribution, at the straightening point surface temperature is greater than 900 ℃, without the possible liquid core straightening. To this end the use of computer-controlled secondary cooling water distribution, gas - water spray cooling.
3, control the secondary cooling zone slab stress and deformation
In the secondary cooling zone solidified shell is the source of the stress and deformation cracks. To this end multi-point bending and straightening of the arc accurate, the roll gap of the compression molding technology.
Hongji machine is specializing in the production of ceramsite line more than thirty years, the products include crushing equipment, mobile crushing plant, processing equipment, milling equipment, rotary kiln, dryers and other equipment, welcome advice to buy.
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