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A metal-ceramic composite sintering machine grate bar and its preparation method

A metal-ceramic composite and machine furnace technology, which is applied in the field of metal matrix composite materials, can solve problems such as coating layer damage, and achieve the effects of good impact resistance, multiple comprehensive benefits, and good wear resistance

Active Publication Date: 2021-11-16
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The paint contains SiC, which is easily oxidized to SiO at high temperature 2 and CO 2 , will cause damage to the coating layer

Method used

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  • A metal-ceramic composite sintering machine grate bar and its preparation method
  • A metal-ceramic composite sintering machine grate bar and its preparation method
  • A metal-ceramic composite sintering machine grate bar and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of preparation method of metal-ceramic composite sintering machine grate bar, it is made of 25wt% heat-resistant steel fiber and 75wt% Al 2 o 3 -SiO 2 prepared from mullite ceramic powder. The preparation method is as follows:

[0026] Place the heat-resistant steel fibers evenly in the grate bar-shaped mold. to Al 2 o 3 -SiO 2 Add water accounting for 10% of its weight to the mullite ceramic powder, stir it into a slurry with good fluidity in a stirring pot, pour the slurry into a mold containing heat-resistant steel fibers, and vibrate on a vibrating table Molding for 30 seconds, so that the ceramic slurry fills each space between the steel fiber and the mold, and tightly wraps each steel fiber. Curing in the mold for 24 hours after forming, demoulding after hardening; curing the structural parts of the composite grate bar after demoulding at room temperature for 24 hours, and then putting them into an oven at 110°C for 20 hours to form a higher strength...

Embodiment 2

[0028] A kind of preparation method of metal-ceramic composite sintering machine grate bar, it is made of 30wt% heat-resistant steel fiber and 70wt% Al 2 o 3 -SiO 2 prepared from mullite ceramic powder. The preparation method is as follows:

[0029] Place the heat-resistant steel fibers evenly in the grate bar-shaped mold. to Al 2 o 3 -SiO 2 The mullite ceramic powder of the series is added with 9.2% of its weight in water, stirred in a stirring pot to form a slurry with good fluidity, poured into a mold containing heat-resistant steel fibers, and formed by vibration on a vibrating table For 35 seconds, the ceramic slurry is filled into each space between the steel fiber and the mold, and tightly wraps each steel fiber. Curing in the mold for 20 hours after forming, demoulding after hardening; curing the structural parts of the composite grate bar after demoulding at room temperature for 20 hours, and then putting them in an oven at 110°C for 18 hours to form a higher s...

Embodiment 3

[0031] A kind of preparation method of metal-ceramic composite sintering machine grate bar, it is made of 35wt% heat-resistant steel fiber and 65wt% Al 2 o 3 -SiO 2 prepared from mullite ceramic powder. The preparation method is as follows:

[0032] Place the heat-resistant steel fibers evenly in the grate bar-shaped mold. to Al 2 o 3 -SiO 2 The mullite ceramic powder of the series is added with 8.5% of its weight in water, stirred in a stirring pot to form a slurry with good fluidity, poured into a mold containing heat-resistant steel fibers, and formed by vibration on a vibrating table For 40 seconds, the ceramic slurry is filled into each space between the steel fiber and the mold, and tightly wraps each steel fiber. Curing in the mold for 16 hours after forming, demoulding after hardening; curing the structural parts of the composite grate bar after demoulding at room temperature for 16 hours, and then drying in an oven at 110°C for 15 hours, the structural parts fo...

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Abstract

The invention provides a metal-ceramic composite sintering machine grate bar and a corresponding preparation method thereof. 2 o 3 ‑SiO2 2 Mullite ceramic powder. The invention also provides a preparation method of the grate bar of the cermet composite sintering machine. The grate bar has the advantages of wear resistance, corrosion resistance, oxidation resistance and high temperature resistance of ceramic materials and good toughness of metal materials. It also has the characteristics of lower and lighter thermal conductivity than metal grate bars, which can also make the sintering trolley more energy-saving, environmentally friendly, lightweight, and longer-lived, reduce sintering energy consumption, improve the on-site operating environment, and generate more economic benefits.

Description

technical field [0001] The invention relates to the field of metal-based composite materials, in particular to a sintering machine grate bar and a preparation method thereof. Background technique [0002] The grate bar is a key part of the sintering machine. The working temperature reaches over 900°C, and it is cooled down to 100°C on the return track. At the same time, it also has to bear the impact and high temperature wear of the sintering ore. After being subjected to repeated cycles of heating, cooling, impact, abrasion and other processes, the surface is gradually oxidized, cracked, collapsed and damaged. Grate bars contain CO, CO 2 , SO 2 In the gas medium with water vapor, it is easy to be corroded by gas, so the grate bar is a wearing part, and its service life directly affects the production efficiency and production cost of sintered ore. At present, the consumption of grate bars of many sintering machines is large, the ton consumption is high, and the service l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/76C04B35/185C04B35/622
CPCC04B35/185C04B35/622C04B35/76C04B2235/3201C04B2235/3208C04B2235/3217C04B2235/3232C04B2235/3272C04B2235/3418C04B2235/5216
Inventor 甘菲芳李咸伟毛晓明向家发胡子国
Owner BAOSHAN IRON & STEEL CO LTD
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