Raw material ratio and production method of ramming material for ring seam of magnesia-calcium brick furnace bottom

A magnesia-calcium brick furnace and ramming material technology, which is applied in the field of ramming material, can solve the problems of poor water repellency, poor plasticity, and performance differences, so as to improve moisture retention and hydration resistance, improve hydration resistance, Solve the effect of short storage period

Active Publication Date: 2018-12-04
SHANXI LUWEIBAO TAIGANG REFRACTORIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with magnesia-calcium bricks, magnesia-calcium ramming materials are more difficult to store and easy to hydrate. During storage and use, they can easily absorb moisture in the air and undergo hydration reactions. This hydration reaction is accompanied by hydration weight gain and volume expansion. , seriously affect the service life
At present, the performance of magnesium-calcium ramming materials produced in China varies greatly, and the main disadvantages are as follows: (1) Poor plasticity and poor construction performance; (2) Poor water resistance and short storage period; (3) Poor structure and compactness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The first step: prepare raw materials according to raw material ratio, by weight,

[0019] Magnesia-calcium sand: 20 parts of granules with a diameter of 3-5mm, 20 parts of granules with a diameter of 1-3mm, and 20 parts of granules with a diameter of 0-1mm, a total of 60 parts, mixed evenly after drying;

[0020] Magnesia: 30 parts of fine material with diameter less than or equal to 0.088mm;

[0021] Silica: 1 part of granular material with a diameter less than or equal to 45 microns;

[0022] Solid resin: 1 part of solid phenolic resin;

[0023] Dry clay: Dry the soft clay for 24 hours at a temperature not lower than 110°C, then take 2 parts

[0024] Bentonite: 2 parts of bentonite;

[0025] Tung oil: 5 parts of tung oil.

[0026] The second step is to manually mix the magnesia-calcium sand, magnesia, silicon dioxide, and solid resin according to the proportion;

[0027] The third step is to add dry clay and bentonite, and mix evenly by hand;

[0028] The fourt...

Embodiment 2

[0030] Make according to Example 1, and add the following steps

[0031] Step 5: Add soda ash to adjust the pH to 11-12 in an environment of 60 degrees Celsius, and stir for 5-10 minutes before cooling to room temperature. Prepare uniformly mixed materials, adjust the pH value, and stir at 60 degrees Celsius for 5-10 minutes and then cool to room temperature to improve the moisture retention and hydration resistance of the materials.

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Abstract

The invention relates to the field of ramming materials and particularly relates to a raw material ratio and a preparation method of a bottom circular seam ramming material for a magnesia-calcium brick furnace. The raw material ratio is prepared from the following raw materials in parts by weight: 20-60 parts of magnesia-calcium sand, 10-30 parts of magnesia, 1-3 parts of dry clay, 1-2 parts of bentonite, 1-2 parts of silicon dioxide and 1-2 parts of solid resin. The raw materials are bound by 5-10 parts of tung oil to be prepared into the ramming material by virtue of substeps. The ramming material has good slag resistance, thermal shock resistance and high-temperature stability and is capable of purifying molten steel.

Description

technical field [0001] The invention relates to the field of ramming materials, in particular to a raw material ratio and a production method of ramming materials for ring seams of magnesia-calcium brick furnace bottoms. Background technique [0002] Magnesium-calcium refractory material is a kind of alkaline refractory material, which has the excellent characteristics of high temperature resistance and alkaline corrosion resistance, and will not cause environmental pollution. It is a kind of green and environmentally friendly refractory material. Magnesium-calcium refractories are widely used in the production of stainless steel and clean steel, which can effectively remove impurities such as Al, S, and P in molten steel, and purify molten steel. Magnesia-calcium furnace bottom ring seam ramming material is mainly used with magnesia-calcium bricks for ramming and filling of AOD furnace bottom ring seams, stainless steel bag bottom ring seams, breathable bricks and nozzle se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/06
CPCC04B35/06C04B35/66C04B2235/3206C04B2235/3418C04B2235/349C04B2235/5427C04B2235/5436
Inventor 郭银栋张冰冯云康
Owner SHANXI LUWEIBAO TAIGANG REFRACTORIES CO LTD
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