Method for building high-age medium-frequency induction furnace through quartz sand and use method

A quartz sand, induction furnace technology, applied in furnaces, crucible furnaces, furnace types, etc., can solve the problems of unreasonable process, short service life, poor material formula and ratio, etc. Effective service life and small thermal expansion rate

Active Publication Date: 2014-03-26
齐齐哈尔重型铸造有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The service life of the intermediate frequency induction furnace largely depends on the crucible knotting technology. This crucible knotting method directly affects the production efficiency and production cost of the enterprise. The following problems generally exist when most existing manufacturers prepare crucibles: 1. The material formula and proportion of the crucible are not good; 2. The process is unreasonable
As a result, the service life of the current crucible is short, and the general furnace life is between 20 furnaces and 30 furnaces

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: A method for building a quartz sand furnace for an intermediate frequency induction furnace of a blast furnace age, the method specifically includes the following steps:

[0031] 1) Prepare the sand material for knotting the furnace bottom and furnace wall: use a magnet to remove the iron powder in the quartz sand, mix the quartz sand with a high-temperature agent with a particle size of 70-100 mesh at a mass ratio of 100:3, Stir evenly to obtain the sand material, the particle size composition and weight percentage of the quartz sand are:

[0032] 4~6 mesh 4%;

[0033] 6~8 mesh 12%;

[0034] 8~16 mesh 18%;

[0035] 16~28 mesh 16%;

[0036] 16~28 mesh 14%;

[0037] More than 200 mesh 36%;

[0038] 2) Prepare the furnace mouth mixture for knotting the furnace mouth: mix the sand material prepared in step 1) with water glass at a mass ratio of 100:4, and stir evenly to obtain the furnace mouth mixture;

[0039] 3) Knotting the furnace bottom and furnac...

Embodiment 2

[0044] Embodiment 2: A method for building a blast furnace age medium frequency induction furnace with quartz sand, the method specifically includes the following steps:

[0045] 1) Prepare the sand material for knotting the furnace bottom and furnace wall: use a magnet to absorb the iron powder in the quartz sand, mix the quartz sand with a high-temperature agent with a particle size of 100-120 mesh at a mass ratio of 100:3.5, Stir evenly to obtain the sand material, the particle size composition and weight percentage of the quartz sand are:

[0046] 4~6 mesh 5%;

[0047] 6~8 mesh 15%;

[0048] 8~16 mesh 15%;

[0049] 16~28 mesh 15%;

[0050] 16~28 mesh 15%;

[0051] More than 200 mesh 35%;

[0052] 2) Prepare the furnace mouth mixture for knotting the furnace mouth: mix the sand material prepared in step 1) with water glass at a mass ratio of 100:4.5, and stir evenly to obtain the furnace mouth mixture;

[0053] 3) Knotting the furnace bottom and furnace wall: fix the ...

Embodiment 3

[0058] Embodiment 3: A method for building a blast furnace medium-frequency induction furnace with quartz sand, the method specifically includes the following steps:

[0059] 1) Prepare the sand material for knotting the furnace bottom and furnace wall: use a magnet to remove the iron powder in the quartz sand, mix the quartz sand with a high-temperature agent with a particle size of 120~140 mesh at a mass ratio of 100:4, Stir evenly to obtain the sand material, the particle size composition and weight percentage of the quartz sand are:

[0060] 4~6 mesh 6%;

[0061] 6~8 mesh 10%;

[0062] 8~16 mesh 10%;

[0063] 16~28 mesh 20%;

[0064] 16~28 mesh 20%;

[0065] More than 200 mesh 34%;

[0066] 2) Prepare the furnace mouth mixture for knotting the furnace mouth: mix the sand material prepared in step 1) with water glass at a mass ratio of 100:5, and stir evenly to obtain the furnace mouth mixture;

[0067] 3) Knotting the furnace bottom and furnace wall: fix the inductio...

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Abstract

The invention discloses a method for building a high-age medium-frequency induction furnace through quartz sand and a use method. The method for building the high-age medium-frequency induction furnace comprises the steps that firstly, sand used for ramming a furnace bottom and furnace walls and furnace mouth mixed materials used for ramming a furnace mouth are prepared; secondly, the furnace bottom, the furnace walls and the furnace mouth are rammed in sequence; finally, the furnace bottom, the furnace walls and the furnace mouth are baked and sintered into a whole so that the furnace can be built. The medium-frequency induction furnace manufactured through the method has the advantages of being resistant to high temperature, good in chemical stability, good in rapid-cooling resistance and rapid-heating resistance, small in thermal expansion coefficient, resistant to corrosion by slag and molten liquid and the like. The medium-frequency induction furnace manufactured through the method can be used over 200 times through a trial. Meanwhile, the method comprises the steps that when the medium-frequency induction furnace is used for melting iron each time, the rated power of the medium-frequency induction furnace is controlled within the range between 35% and 40% half hour before the iron is melted; in addition, each time the medium-frequency induction furnace is cooled, nuts in the positions of an induction coil are fastened, and therefore the induction coil is prevented from falling off when the iron is melted. According to the use method, the service life of the medium-frequency induction furnace is further prolonged.

Description

technical field [0001] The invention relates to a method for building a blast furnace medium-frequency induction furnace with quartz sand and a method for using it. Background technique [0002] The medium frequency induction furnace refers to an induction furnace powered by a power supply with a current frequency in the range of 150 to 8000Hz. The intermediate frequency induction furnace has the characteristics of fast melting speed, high production efficiency, strong adaptability, flexible use, good electromagnetic stirring effect, convenient start-up operation, etc. It is mainly used for smelting high-quality steel and various alloy materials in casting production. There are two types of intermediate frequency induction furnaces: melting channel type and crucible type. Crucible type intermediate frequency induction furnaces are mainly used in smelting production. The service life of the intermediate frequency induction furnace largely depends on the crucible knotting tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D1/16F27B14/08
Inventor 黄文泰王明杰
Owner 齐齐哈尔重型铸造有限责任公司
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