Zirconia ceramic screen bar
A zirconia ceramic and zirconia technology, applied in centrifuges and other directions, can solve the problems of unsatisfactory dehydration effect of pulverized coal dehydrator, and achieve ideal operation effect, high hardness and good toughness.
Inactive Publication Date: 2009-12-09
陈洪德
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Because zirconia has the characteristics of high hardness, high strength, good toughness, and wear resistance, the zirconia sieve made by it has been used by many coal washing plants to solve the unsatisfactory dehydration effect of the water-coal dehydrator.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0006] Zirconia ceramic sieve bar, the sieve bar is made of zirconia ceramics with a purity of more than 99% by pressing and sintering. It is formed by dry pressing zirconia granules of more than 300 meshes and firing at 1600°C-1700°C. become.
[0007] The performance comparison data of the zirconia ceramic sieve bar and tungsten steel are as follows:
[0008] Zirconia Tungsten steel
[0009] Hardness: Mohs 8.5 Rockwell 89HRA
[0010] Density: 5.9g / cm 3 14g / cm 3
[0011] Fracture toughness: 8-9MPA.m 3 / 2 6.6-7.5MPA.m 3 / 2
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| density | aaaaa | aaaaa |
| hardness | aaaaa | aaaaa |
Login to View More
Abstract
The invention provides a zirconia ceramic screen bar, and belongs to a washing equipment part. The screen bar is produced by pressing and sintering zirconia ceramics with the purity of over 99 percent. The screen bar produced by utilizing the characteristics of the zirconia ceramics has the advantages of high hardness, good toughness and wear resistance, and can completely replace the tungsten steel screen bar of the imported water pulverized coal centrifugal dehydrator; moreover, the actual operating effect is ideal, and the repaired water pulverized coal centrifugal dehydrator has good dehydrating effect.
Description
technical field [0001] The invention belongs to washing equipment parts, in particular to a sieve bar for a water-coal powder centrifugal dehydrator. Background technique [0002] At present, many water-coal powder centrifugal dehydrators used in large-scale coal washing plants in China rely on imports and are expensive. The centrifugal dehydrator uses tungsten steel dehydration screen bars. Although the tungsten steel screen bars have high hardness, they are brittle. During high-speed operation It is prone to breakage, causing many cavities in the centrifuge casing, which greatly reduces the centrifugal dehydration effect of water-coal powder, and cannot reach the water-coal powder dehydration index stipulated by the state. Contents of the invention [0003] The present invention is just to overcome the above-mentioned shortcomings, and provides a sieve bar made of zirconia ceramics to replace the tungsten steel sieve bar used in imported equipment, so as to repair the ce...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B04B7/00C04B35/48
Inventor 陈洪德陈兴
Owner 陈洪德