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Process for repairing worn discharging head of rotor scale

A technology of discharge head and material head, which is applied in the direction of manufacturing tools, metal processing equipment, welding equipment, etc., can solve the problems of easy perforation, serious parts erosion, and affect the comprehensive production capacity of equipment, so as to save procurement costs and solve the problem of using Effect of short life and improved wear resistance

Inactive Publication Date: 2012-02-22
SHANDONG DONGHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual use, the pulverized coal weighed by the rotor scale is transported to the burner by compressed air for combustion. Due to the high flow rate of the compressed air, the pulverized coal and compressed air will seriously wash away the parts of the rotor scale, especially the discharge The side of the head is prone to perforation, and generally only has a service life of 3 to 4 months, which does not match the maintenance period of the cement clinker firing system, which affects the comprehensive production capacity of the equipment
At present, there is no repair process that can prevent wear in advance or be effective after wear in the production process

Method used

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  • Process for repairing worn discharging head of rotor scale
  • Process for repairing worn discharging head of rotor scale
  • Process for repairing worn discharging head of rotor scale

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Refer to attached Figure 1~2 :

[0021] For the discharge head 5 that has been ground and perforated after a period of use, firstly weld a 6mm thick steel plate 3 on the outside of the perforated part of the discharge head 5 when repairing. Solder fixed. Then use J422 welding rod to repair the inner side of the worn part of the discharge head 5 layer by layer until the thickness of the repair welding layer 2 is close to the thickness of the original discharge head or 3mm lower than the original thickness, and the progress of the layer-by-layer welding repair process Don't be too fast. After each layer is welded, the temperature should be reduced to no dark red, and the coating should be cleaned before the next layer can be repaired, so that there is no need to grind the weld during welding. Finally, a layer of high manganese alloy wear-resistant surfacing layer 1 is surfacing on the repair welding layer 2. The thickness of the wear-resistant surfacing layer 1 is 3 to...

Embodiment 2

[0023] Refer to attached image 3 :

[0024] For the discharge head with severe wear and depth greater than 4mm but without grinding and perforation, use J422 welding rod to repair the inner side of the worn part of the discharge head layer by layer until the thickness of the repair welding layer 2 is close to the thickness of the original discharge head or lower. Due to the original thickness of 3mm, the progress of welding repair layer by layer should not be too fast. After each layer is welded, the temperature should be reduced to no dark red, and the coating should be cleaned before the next layer can be repaired, so that there is no need to grind the weld during welding; finally A layer of high manganese alloy wear-resistant surfacing layer 1 is surfacing on the repairing welding layer 2. The thickness of the wear-resistant surfacing layer 1 is 3-5mm. The welding rod used is D256. The surfacing layer should be as uniform as possible. A small amount of cracks is normal Af...

Embodiment 3

[0026] Refer to attached Figure 4 :

[0027] For a wear depth less than 4mm or a brand-new discharge head, a wear-resistant surfacing layer 1 is welded on the inner side of the easily worn part. The wear-resistant surfacing layer 1 is a layer of high manganese alloy surfacing layer. The thickness of the wear-resistant surfacing layer 1 3~5mm, the welding rod used is D256, the surfacing layer should be as uniform as possible, and a small amount of cracks is normal and does not affect the use.

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Abstract

The invention discloses a process for repairing a worn discharging head of a rotor scale, belongs to the technical field of maintenance of cement production equipment, and in particular relates to a process for repairing worn parts of coal feeding wearing parts in the discharging head of the German Pfister rotor scale. The process is characterized by comprising the following steps of: performing a first layer of repair welding on the inner side of the worn part of the discharging head by using a J422 welding rod; after the first layer of welding is finished, cooling the welding layer until the welding layer is not dark red, cleaning off coatings and performing repair welding on another layer; and performing repair welding layer by layer and overlaying a high-manganese-alloy wear-resistantoverlaying layer (1) on the repair welding layer (2) by using a D256 welding rod. The process for overlaying a wear-resistant layer for a new discharging head and repairing the seriously worn discharging head first and then overlaying the wear-resistant layer effectively improves the wear resistance of the discharging head, makes the overlaying wear-resistant layer have the service life of 7 to 8months, solves the problem of short service life of the discharging head, and can repeatedly repair the worn discharging head for use so as to save the purchase cost of the imported parts.

Description

technical field [0001] The invention discloses a wear-resistant repairing process for a rotor weighing discharge head, which belongs to the technical field of cement production equipment maintenance, and specifically relates to a wear-resistant repairing process for the coal-feeding easy-wear parts in the German Pfister rotor weighing discharge head. Background technique [0002] German Pfister Rotor is a kind of powder metering equipment, which can be used in the feed metering process of powdered raw materials such as coal powder, flour, talcum powder and so on. In the cement clinker production process, the rotor is called to undertake the coal powder metering and transportation work of the rotary kiln burner and the calciner, and is an important control equipment for the cement clinker burning thermal system. In actual use, the pulverized coal weighed by the rotor scale is transported to the burner by compressed air for combustion. Due to the high flow rate of the compress...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K31/02
Inventor 贾忠李明良郭森孙槟邱振伟
Owner SHANDONG DONGHUA TECH CO LTD
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