A kind of preparation method of hearth roller of normalizing furnace

A hearth roll and normalizing furnace technology, which is applied in the field of refractory materials, can solve the problems of shortening the service life of fiber hearth rolls, affecting the output of steel plates, and shedding of fiber sheets, and achieves low material cost, high self-adaptive pressing performance, and finished products rate-enhancing effect

Active Publication Date: 2018-03-06
LUOYANG KECHUANG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the fiber hearth roll is used in a high-temperature environment above 1000°C for a long time, the fiber will be pulverized, resulting in circumferential and longitudinal cracks on the surface of the fiber hearth roll. Once the circumferential cracks increase or the longitudinal cracks extend into pieces It will cause the fiber sheet to fall off as a whole, shorten the service life of the fiber hearth roller, and affect the output of the steel plate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method for a hearth roll of a normalizing furnace, comprising the following steps:

[0018] ① Preparation of slurry: put 15wt% asbestos fiber, 3wt% sepiolite, 2wt% alumina powder, 40wt% water-based thermosetting acrylic resin, and 40wt% water into a homogenizer, and stir at high speed for 15 minutes to make a uniform slurry;

[0019] ②Preparation of roller rings: pump the uniform slurry into the forming mold with a non-clogging pump, the pressing pressure of the upper die head is 10 tons, and at the same time vacuum suction and filter, demold, and dry in a drying kiln at 60°C for 24 hours, and at 120°C for 24 hours. Make a 5mm thick roll ring;

[0020] ③ Furnace roller pressing: put the roller ring on the furnace roller mandrel, press and install every 20 pieces with a CNC press-fitting machine with a mechanical output of 50 tons, until the furnace roller is installed;

[0021] ④ Furnace roller surface treatment: use CNC machine tools to turn the surface ...

Embodiment 2

[0023] A preparation method for a hearth roll of a normalizing furnace, comprising the following steps:

[0024] ① Preparation of slurry: put 14wt% asbestos fiber, 4wt% sepiolite, 2wt% alumina powder, 40wt% water-based thermosetting acrylic resin, and 40wt% water into a homogenizer, and stir at high speed for 18 minutes to make a uniform slurry;

[0025] ②Preparation of roller rings: pump the uniform slurry into the forming mold with a non-clogging pump. The pressing pressure of the upper die head is 10 tons. Make a 6mm thick roll ring;

[0026] ③ Furnace roller pressing: put the roller ring on the furnace roller mandrel, press and install every 20 pieces with a CNC press-fitting machine with a mechanical output of 50 tons, until the furnace roller is installed;

[0027] ④ Furnace roller surface treatment: use CNC machine tools to turn the surface of the installed furnace roller to make a furnace roller with a flat surface.

Embodiment 3

[0029] A preparation method for a hearth roll of a normalizing furnace, comprising the following steps:

[0030] ① Preparation of slurry: put 16wt% asbestos fiber, 3wt% sepiolite, 2wt% coke powder, 39wt% water-based thermosetting acrylic resin, 40wt% water into a homogenizer, and stir at high speed for 16 minutes to make a uniform slurry;

[0031] ②Preparation of roller rings: pump the uniform slurry into the forming mold with a non-clogging pump. The pressing pressure of the upper die head is 10 tons. Make a 5mm thick roll ring;

[0032] ③ Furnace roller pressing: put the roller ring on the furnace roller mandrel, press and install every 20 pieces with a CNC press-fitting machine with a mechanical output of 50 tons, until the furnace roller is installed;

[0033] ④ Furnace roller surface treatment: use CNC machine tools to turn the surface of the installed furnace roller to make a furnace roller with a flat surface.

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PUM

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Abstract

The invention discloses a method for preparing hearth rolls of a normalizing furnace, which comprises the following steps: preparing slurry, preparing roll rings, pressing the furnace rolls, and treating the surface of the furnace rolls. The method for preparing the hearth roller of the normalizing furnace of the present invention has high yield and low cost. During service, the furnace roll has the advantages of high temperature resistance, small shrinkage, good rebound, no pulverization, no cracking, and no block falling. It can effectively protect the surface of the steel plate from damage.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a method for preparing a hearth roller of a normalizing furnace. Background technique [0002] The normalizing furnace is the key process equipment for heat treatment of steel plates. It is usually installed at the rear of the medium and heavy plate production line to perform continuous heat treatment on steel plates. Its transmission mode is divided into two types: roller hearth type and stepping type. In the production practice of the roller hearth normalizing furnace, the heated workpiece is placed on the furnace roller, heated and transported in the furnace according to the speed and temperature set by the process, so the hearth roller is the core component of the normalizing furnace . [0003] At present, the normalization furnace of the production line of the medium and heavy plate factory in the steel plant usually adopts stainless steel hearth ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 马军强
Owner LUOYANG KECHUANG NEW MATERIAL CO LTD
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