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Testing method for corrosion resistance of magnesia carbon bricks by adopting small intermediate-frequency furnace

An intermediate frequency furnace, anti-corrosion technology, applied in the direction of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc. Research on carbon bricks and other issues to achieve the effect of short melting time, small temperature difference between core and surface, and uniform heating

Inactive Publication Date: 2017-10-24
ZHENGZHOU ZHENDONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since there are not many studies on the anti-slag erosion performance of magnesia-carbon bricks at present, it is impossible to scientifically analyze the anti-corrosion performance of magnesia-carbon bricks with various formulas, which limits further research on magnesia-carbon bricks.

Method used

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  • Testing method for corrosion resistance of magnesia carbon bricks by adopting small intermediate-frequency furnace
  • Testing method for corrosion resistance of magnesia carbon bricks by adopting small intermediate-frequency furnace
  • Testing method for corrosion resistance of magnesia carbon bricks by adopting small intermediate-frequency furnace

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Embodiment Construction

[0020] The present invention will be described in more detail below through specific examples.

[0021] Purpose of the test: To compare the corrosion resistance of ordinary magnesia-carbon bricks (marked as No. 1) and magnesia-carbon bricks processed with modified binders (marked as No. 2).

[0022] first step, preparation

[0023] Select three ordinary magnesia-carbon bricks and three magnesia-carbon bricks processed with modified binders, cut them into splines 1 with a size of 20mm×20mm×200mm, measure the original size of each spline 1, record the data, and Make a mark on the spline. Bind the spline evenly on the mold core 2. The mold core 2 is a hollow cone with a bottom, the inner diameter of the bottom is 80mm, the inner diameter of the top is 80mm, and the height is 201mm. The outer mold 3 is assembled into a circle with an inner diameter of 160mm and a height of 270mm. Cylindrical shape; after the mold is assembled, use corundum castable 4 (or casting seat brick) to c...

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Abstract

The invention discloses a testing method for corrosion resistance of magnesia carbon bricks by adopting a small intermediate-frequency furnace. A sample is cut into a long strip and bound to the peripheral surface of a mold core after original size is recorded, and a mold is assembled; a crucible is prepared through casting with a corundum material, maintenance and drying; a steel block is added for low-temperature baking of the intermediate-frequency furnace after the crucible is fixed in an induction coil of the intermediate-frequency furnace; after the steel block is molten, a certain amount of slag is added, the temperature in the furnace is controlled at 1680 DEG C plus / minus 30 DEG C, counting starts when the slag is molten completely, and molten steel and the slag are poured out after heat is preserved for 120 min; the crucible is taken out after being completely cooled and is cut transversely along an corrosion line, and corrosion thickness at the corrosion line is measured and compared with the original size; the crucible is knocked open, the sample is taken out and subjected to material change analysis microscopically. The testing method is simple and direct and has guiding significance in production, research and development work, and advantages and disadvantages of slag corrosion resistance of work-layer refractory material products adopting different technical formulae and applied to the magnesia carbon bricks or steel ladles can be compared by simulating conditions of actual work sites.

Description

technical field [0001] The invention relates to a test of a refractory material for a working layer of a ladle, in particular to a method for performing an anti-corrosion test of a magnesia-carbon brick by using a small intermediate frequency furnace. Background technique [0002] In order to meet the production needs, various refractory materials used in the ladle working layer are required to have certain anti-slag intrusion, anti-scouring and anti-flaking properties. Due to the non-wetting of graphite and slag and the good thermal conductivity of graphite, magnesia carbon bricks have excellent slag erosion resistance and thermal shock stability, and are widely used in steelmaking production. Since there are not many studies on the anti-slag erosion performance of magnesia-carbon bricks at present, it is impossible to scientifically analyze the anti-corrosion performance of magnesia-carbon bricks with various formulas, which limits further research on magnesia-carbon brick...

Claims

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Application Information

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IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 侯振东侯会峰刘大圈王俊超周慧远
Owner ZHENGZHOU ZHENDONG TECH
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