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Highly-corrosion-resistant stirrer and making method thereof

A stirrer, high corrosion resistance technology, applied in chemical instruments and methods, mixer with rotating stirring device, improvement of process efficiency, etc., can solve problems such as high manufacturing cost, corrosion failure, complex coating process, etc., to achieve Reduce maintenance times and costs, ensure safety and reliability, and achieve obvious economic benefits

Active Publication Date: 2017-12-29
LUOYANG SUNRUI SPECIAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical disadvantages of this scheme are: ① the coating process of resin is complicated and the manufacturing cost is high; ② the wear resistance of resin is poor. During the liquid stirring process, the particles in the liquid collide with the resin and cause damage to the resin, which corrodes the liquid and carbon steel. Severe chemical reactions occur, resulting in corrosion failure; ③The service life of the agitator is short, and it needs to be replaced once a year on average

Method used

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  • Highly-corrosion-resistant stirrer and making method thereof
  • Highly-corrosion-resistant stirrer and making method thereof
  • Highly-corrosion-resistant stirrer and making method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1: 00Cr25Ni7Mo3.5WCuN super duplex stainless steel stirrer

[0053] (1) Stirrer structure design

[0054] a) According to the principle of fluid mechanics, calculate the critical speed N of the agitator according to the formula (5) c =74.8r / min, this speed meets the output speed requirement of the reducer.

[0055]

[0056] Among them, K is a constant, d is the blade diameter, d p is the solution particle diameter, C is the solid-liquid mass ratio, ν is the liquid kinematic viscosity, ρ is the liquid phase density, ρ s is the solid phase density, and g is the gravitational acceleration.

[0057] b) According to the principles of fluid mechanics, the power of the agitator is calculated according to formulas (6) to (11) P = 6.2KW, which is less than the power of the motor. Therefore, the selection of blade diameter and width is reasonable and meets the design requirements.

[0058] P=N pρ介质 N 3 d 5 (6)

[0059]

[0060]

[0061]

[0062]

...

Embodiment 2

[0093] Example 2: 00Cr25Ni7Mo4N super duplex stainless steel stirrer

[0094] (1) Stirrer structure design

[0095] a) According to the principle of fluid mechanics, calculate the critical speed N of the agitator according to the formula (5) c =66r / min, this speed meets the requirements of the output speed of the reducer.

[0096] b) According to the principles of fluid mechanics, the power of the agitator is calculated according to formulas (6) to (11) P = 19.4KW, which is less than the power of the motor. Therefore, the selection of blade diameter and width is reasonable and meets the design requirements.

[0097] c) According to the principle of strength check, and considering the corrosion allowance of the material 6mm, calculate the shaft diameter d of the agitator according to the formula (12) ~ (19) 轴 It is 110mm, which meets the design requirements.

[0098] d) According to the size of the shaft diameter, the width of the blade fixing plate is designed to be 100mm,...

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Abstract

The invention discloses a highly-corrosion-resistant stirrer and a making method. The highly-corrosion-resistant stirrer comprises a stirring shaft, a hub, blade fixing plates and blades, wherein one end of the stirring shaft is connected with a power device, and the other end of the stirring shaft is welded with the hub; one end of the blade fixing plate is welded with the hub, and the other end of the blade fixing plate is connected with the blade by fasteners; the blade fixing plates are flat plates and form angles of 30-50 degrees with the axis of the stirring shaft; and the surface hardness of the blades is 20-24HRC, the inclination angles and the widths of the blades change along with the length directions of the blades. The preparation method comprises the following steps: carrying out primary smelting in a medium-frequency induction furnace, carrying out refined smelting in an argon-oxygen decarburization furnace, adopting an electroslag remelting process to smelt a super duplex stainless-steel ingot, forging the super duplex stainless-steel ingot to be molded, and after solids are dissolved, assembling and molding. The highly-corrosion-resistant stirrer and the preparation method disclosed by the invention have the advantages that the production cost is reduced, and the service life of equipments prolonged and the use safety of equipment in the zinc preparation industry is improved.

Description

technical field [0001] The invention belongs to the technical field of special liquid stirring, and in particular relates to a high-corrosion-resistant stirrer and a manufacturing method thereof. Background technique [0002] In the chemical industry, food, metallurgy, papermaking, petroleum and water treatment industries, it involves the mixing of liquids, that is, using agitators to mix different industrial liquids to make their composition, heat and density uniform and meet the requirements of actual production. [0003] The agitator is generally composed of a shaft and a paddle. The paddle is the core component of the agitator. A certain flow field is formed through the rotation of the paddle to realize the mixing of different liquids. [0004] The liquid used in the extraction, leaching, pickling and other processes in the hydrometallurgy industry is highly corrosive. Therefore, the agitator used for stirring the liquid must have good corrosion resistance. At present, ...

Claims

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Application Information

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IPC IPC(8): B01F7/00C22B3/02C22B19/20
CPCC22B3/02C22B19/20B01F27/053B01F27/112Y02P10/20
Inventor 姚长江王新鹏罗利阳梁晓辉朱晓锋张娟娟陈帅超张春林
Owner LUOYANG SUNRUI SPECIAL EQUIP
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