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Blind window drying bed fire grate bar and smelting production method thereof

A production method and shutter technology, applied in the field of pellet production equipment, can solve the problems of clogging of gaps, restricting the output of pellets, etc., and achieve the effects of reducing the clogging rate, being less prone to deformation and corrosion, and improving the ventilation rate.

Pending Publication Date: 2018-07-20
马鞍山市新越机械修造有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that existing drying shaft furnace grate bars are clogged in gaps during production and use, which restricts the production of pellets, the invention provides a louvered drying bed grate bar and its smelting production method, which has a simple structure and solves the problem of grate The problem of large-area blockage of grate bars can be improved, the drying effect of the drying bed can be improved, and the output of shaft furnace pellets can be improved; the smelting and production method of the grate bars is also provided, which is low in production cost, has good performance, and has a service life of up to 1 Up to 2 years, with good promotion and application value

Method used

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  • Blind window drying bed fire grate bar and smelting production method thereof
  • Blind window drying bed fire grate bar and smelting production method thereof
  • Blind window drying bed fire grate bar and smelting production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as Figure 1 to Figure 3 As shown, the louvered drying bed grate bar 100 of the present embodiment includes a grate bar body 110, webs 120 are symmetrically arranged on both sides of the grate bar body 110, and bar holes 111 are provided on the grate bar body 110, and the bar holes 111 is inclined and the air inlet is flaring. When in use, the bar hole 111 is in a horizontal state; both ends of the web 120 are processed into a shape that matches the outer surface of the water beam 200 .

[0049] It is worth noting that in the actual production process, 4% to 5% of the green pellets are larger than 18mm (generally, the green pellets are required to be 9 to 18mm). It is 20mm and is a bar hole (in the case of the same ventilation area per unit area), the grate bar hole is very easy to be blocked. From the production practice, the blockage rate is about 20% to 30%, the ventilation rate is reduced, and the unit time The output is reduced, which greatly affects the norm...

Embodiment 2

[0070] A kind of louver drying bed grate bar of this embodiment is similar in structure to embodiment 1, the difference is that, in this embodiment, the hole diameter D is 21mm, and the centerline of the bar hole 111 and the grate bar body 110 The center line forms an included angle of 30°, and the air inlet is flaring. When in use, the bar hole 111 is in a horizontal state, and the grate bar is composed of the following components by weight percentage (wt%): C: 0.38%; Cr: 22.2 %; Si: 3.85%; Ni: 1.04%; Mn: 0.45%; S: ≤0.02%; P: ≤0.02%, and the remaining components are Fe and trace impurities.

[0071] A kind of smelting production method of the louver drying bed grate bar of this embodiment, its smelting process comprises:

[0072] (1) Furnace charge selection: Proportioning is carried out according to the components of the grate bar, and high-chromium scrap steel (with a chromium content of more than 25%) that is rust-free, oil-free, and free of any impurities is used as the c...

Embodiment 3

[0087] A kind of louver drying bed grate bar of this embodiment is similar in structure to embodiment 1, the difference is that, in this embodiment, the hole diameter D is 25mm, and the center line of the bar hole 111 is in line with the grate bar body 110 The center line forms an included angle of 36°, and the air inlet is flaring. When in use, the bar hole 111 is in a horizontal state, and the grate bar is composed of the following components by weight percentage (wt%): C: 0.32%; Cr: 24.80 %; Si: 3.0%; Ni: 0.81%; Mn: 0.5%; S: ≤0.02%; P: ≤0.02%, and the remaining components are Fe and trace impurities.

[0088] A kind of smelting production method of the louver drying bed grate bar of this embodiment, its smelting process comprises:

[0089] (1) Furnace charge selection: Proportioning is carried out according to the components of the grate bar, and high-chromium scrap steel (with a chromium content of more than 25%) that is rust-free, oil-free, and free of any impurities is u...

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Abstract

The invention discloses a blind window drying bed fire grate bar and a smelting production method thereof, and belongs to the technical field of pellet production equipment. The fire grate bar comprises a fire grate bar body; web plates are symmetrically arranged on the two sides of the fire grate bar body; a strip hole is formed in the fire grate bar body; the aperture D of the strip hole is 21-25 mm; the strip hole is inclined; an air inlet is flared; the strip hole is located in a horizontal state in use; and the two ends of the web plates are machined as shapes cooperating with the outer surface of a water beam. The fire grate bar solves the large-area blockage difficulty of grate bar gaps, improves the drying effect of a drying bed, and increases the shaft furnace pellet yield; the smelting production method of the fire grate bar is low in manufacturing cost and excellent in use performance, can reach 1-2 years of service life, and achieves excellent popularization and applicationvalue; and the fire grate bar has the advantages of simple structure, reasonable design and easy manufacturing.

Description

technical field [0001] The invention belongs to the technical field of pellet production equipment, and more specifically relates to a louver drying bed furnace grate bar and a smelting production method thereof. Background technique [0002] The sintering and drying shaft furnace is an important equipment for metallurgical production. During operation, the green balls with a certain particle size are transported to the top of the shaft furnace by a belt conveyor, and are continuously and evenly distributed into the drying bed by the distribution machine, and then enter the shaft furnace. The raw balls fall at a certain speed, and the high-heat gas in the combustion chamber is sprayed into the furnace from the burner, and the heat is exchanged from bottom to top. After heat exchange) meet under the grate bars of the drying bed to dry the green balls. At present, the grate bars used in sintering and drying shaft furnaces are likely to cause blockage of the gaps of the grate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B1/10C22C38/40C22C38/04C22C38/02C22C33/04
CPCF27B1/10C22C33/04C22C38/04C22C38/34C22C38/40F27M2003/04
Inventor 谷靓杨征
Owner 马鞍山市新越机械修造有限责任公司
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