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Rotor for conical refiner and manufacturing method of rotor

A conical mill and pulper technology, which is applied in the field of papermaking machinery manufacturing, can solve the problems of short rotor life, low toughness and corrosion resistance, poor welding performance, etc., and achieve good toughness and corrosion resistance, high hardness and wear resistance performance, good welding performance

Inactive Publication Date: 2015-01-28
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem existing in the current conical refiner is that the life of the rotor is short, the service life is only 60-90 days, and it needs to be replaced frequently, which not only increases the maintenance man-hours, but also makes the pulp quality fluctuate, thus directly affecting the output and quality of the refiner. Affect paper production cost
06Cr13 and 12Cr13 with low carbon content have good toughness and corrosion resistance, but low strength and hardness, and are not wear-resistant. 20Cr13 has high hardness and wear resistance, but low toughness and corrosion resistance, and poor welding performance, so it is not easy to The grinding disc is welded on the conical parent body

Method used

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  • Rotor for conical refiner and manufacturing method of rotor
  • Rotor for conical refiner and manufacturing method of rotor
  • Rotor for conical refiner and manufacturing method of rotor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] See Table 1 for the chemical composition of the cone matrix and the alloy of the grinding plate. The manufacturing method of the conical refiner rotor is as follows:

[0026] 1. Use the smelting casting method to manufacture the cone-shaped matrix casting billet, and perform mechanical processing after heat treatment to obtain the cone-shaped matrix.

[0027] 2. The method of manufacturing alloy grinding plate is as follows: 1) The raw material composition of the constituent elements is melted and poured to obtain a steel ingot; 2) Forging; 3) Hot rolled into strip after heating to 1000°C, and air cooling after rolling.

[0028] 3. Weld the alloy grinding piece to the outer surface of the cone matrix.

[0029] 4. Put the welded conical refiner rotor into a heating furnace, heat it to 550°C for 2h, and then cool it in air.

[0030] In the conical refiner rotor manufactured by the above method, the grinding disc and the cone matrix are firmly welded together, and have good corrosi...

Embodiment 2

[0034] See Table 1 for the chemical composition of the cone matrix and the alloy of the grinding plate. The manufacturing method of the conical refiner rotor is as follows:

[0035] 1. Use the smelting casting method to manufacture the cone-shaped matrix casting billet, and perform mechanical processing after heat treatment to obtain the cone-shaped matrix.

[0036] 2. The method of manufacturing alloy grinding plate is as follows: 1) The raw material composition of the constituent elements is melted and poured to obtain a steel ingot; 2) Forging; 3) Hot rolled into a strip after heating to 1050°C, and air cooling after rolling.

[0037] 3. Weld the alloy grinding piece to the outer surface of the cone matrix.

[0038] 4. Put the welded conical refiner rotor into a heating furnace, heat it to 650℃ for 2h, and then cool it in air.

[0039] In the conical refiner rotor manufactured by the above method, the grinding disc and the cone matrix are firmly welded together, and have good corros...

Embodiment 3

[0041] See Table 1 for the chemical composition of the cone matrix and the alloy of the grinding plate. The manufacturing method of the conical refiner rotor is as follows:

[0042] 1. Use the smelting casting method to manufacture the cone-shaped matrix casting billet, and perform mechanical processing after heat treatment to obtain the cone-shaped matrix.

[0043] 2. The method of manufacturing alloy grinding plate is as follows: 1) The raw material composition of the constituent elements is melted and poured to obtain a steel ingot; 2) Forging; 3) Hot rolled into strip after heating to 1100°C, and air cooling after rolling.

[0044] 3. Weld the alloy grinding piece to the outer surface of the cone matrix.

[0045] 4. Put the welded conical refiner rotor into a heating furnace, heat it to 700℃ for 2h, and then cool it in air.

[0046] In the conical refiner rotor manufactured by the above method, the grinding disc and the cone matrix are firmly welded together, and have good corrosio...

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Abstract

The invention provides a rotor for a conical refiner, which consists of a conical matrix and an alloy grinding disc welded on the outer conical surface of the matrix. The rotor is characterized in that the conical matrix comprises the following chemical components by mass percent: 0.02-0.20% of carbon, 0-1.0% of silicon, 0-1.0% of manganese, 0-0.030% of phosphorus, 0-0.010% of sulfur, 12.5-15.0% of chromium, 0-0.2% of nickel, and the balance of iron and inevitable impurities, and the grinding disc alloy comprises the following chemical components by mass percent: 0.005%-0.10% of carbon, 0-1.0% of silicon, 0.5-2.0% of manganese, 0-0.030% of phosphorus, 0-0.010% of sulfur, 12.5-15.0% of chromium, 1.0-4.0% of nickel, 0.4-1.0% of molybdenum, 0.005-0.10% of nitrogen, 0.05-0.50% of niobium, 0.5-1.2% of vanadium, and the balance of iron and inevitable impurities. The manufacturing method of the rotor comprises the following steps: 1) manufacturing the conical matrix by a smelting and casting process, 2) manufacturing the grinding disc, 3) welding the grinding disc on the outer conical surface of the matrix, 4) conducting final heat treatment.

Description

Technical field [0001] The invention relates to a rotor for a cone refiner and a manufacturing method thereof, belonging to the technical field of papermaking machinery manufacturing. Background technique [0002] Generally speaking, the refining equipment widely used in the paper industry can be divided into two types: disc refiner and cone refiner. Among them, the cone refiner has the characteristics of low power consumption, good refining effect, uniform tooth gap and easy precise control, low noise, etc., under the same pulp processing capacity, small size and simple structure. The cone refiner is mainly composed of a frusto-conical rotor equipped with grinding blades, a frusto-conical shell and a gap adjustment mechanism. The gap adjustment mechanism can make the rotor move axially to control the beating pressure. The slurry enters from the small end and is discharged from the big end, continuously beating. The current problem with the conical refiner is that the rotor ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C2/00C22C38/40C22C38/48
Inventor 殷凤仕耿家东薛冰周丽朱修宇孙国栋张文学徐振贾贺泽
Owner SHANDONG UNIV OF TECH