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Method of demolding after ramming acid furnace lining of intermediate frequency furnace

A technology of acid furnace lining and intermediate frequency furnace, which is applied in the direction of unloading device, manufacturing tools, etc., can solve the problems of high cost, increased furnace construction cost, and long oven time, so as to improve the service life of furnace lining, reduce furnace construction cost, improve The effect of furnace building efficiency

Inactive Publication Date: 2019-04-19
BAOTOU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the furnace building is completed, the furnace building mold cannot be pulled out, and needs to be melted with the furnace, so it cannot be reused, which increases the cost of furnace building
[0006] The application number is 201110389441.1, and the patent titled "An intermediate frequency induction melting furnace lining" discloses an intermediate frequency furnace lining and a furnace lining baking method suitable for smelting high manganese steel, stainless steel, and alloy steel. It takes nearly 20 hours to bake and sinter the furnace lining, which takes a long time to bake, high energy consumption and high cost

Method used

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  • Method of demolding after ramming acid furnace lining of intermediate frequency furnace
  • Method of demolding after ramming acid furnace lining of intermediate frequency furnace

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Experimental program
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Effect test

specific Embodiment 1

[0020] This embodiment is completed on a 25kg intermediate frequency induction furnace, and the raw materials for building the furnace are quartz sand and boric acid.

[0021] (1) According to the particle size ratio (2 ~ 4mm): (70 ~ 140 mesh): 320 mesh = 3: 4: 3, respectively weigh 6kg, 8kg and 6kg of quartz sand with three particle sizes, according to the total mass of quartz sand 2% take boric acid 400g by weighing, and the furnace building raw material that takes is mixed evenly standby;

[0022] (2) shop glass cloth;

[0023] (3) Furnace bottom flat paving furnace raw materials (the thickness of each filling is not more than 10cm);

[0024] (4) Use a pointed iron drill to insert it layer by layer from the outside to the inside (uniform force), insert 3 to 5 times at each point (depending on the strength), and flatten the surface, and the thickness of the bottom of the furnace is 40mm;

[0025] (5) Put the furnace mold and adjust the mold in the middle;

[0026] (6) Bea...

specific Embodiment 2

[0032] This embodiment is completed on a 1t intermediate frequency induction furnace, and the raw materials for building the furnace are quartz sand and boric acid.

[0033] (1) According to the particle size ratio (4 ~ 6mm): (20 ~ 40 mesh): (70 ~ 140 mesh): 320 mesh = 1:1:1:2, weigh 100kg and 100kg of quartz sand with 4 particle sizes respectively , 100kg and 200kg, take by weighing 12kg of boric acid according to 2.4% of the total mass of quartz sand, and mix the weighed furnace building materials evenly for subsequent use;

[0034] (2) Spread asbestos cloth in the furnace;

[0035] (3) Furnace bottom flat paving furnace raw materials (the thickness of each filling is not more than 10cm);

[0036] (4) Use a pointed iron drill to insert it layer by layer from the outside to the inside (uniform force), insert 3 to 5 times at each point (depending on the strength), and flatten the surface, and the thickness of the furnace bottom is knotted to 100mm;

[0037] (5) Put the furna...

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Abstract

The invention discloses a method of demolding after ramming an acid furnace lining of an intermediate frequency furnace. The method comprises the following steps of: uniformly shaking a furnace-building mold from the interior by using a small hammer or an iron bar after ramming the furnace lining; starting the intermediate frequency furnace, baking for 10 to 60 minutes with low current, and controlling the temperature in the furnace to be between 150 and 300 DEG C, so that the furnace lining shrinks to become dense, and the density and strength are improved; and finally, pulling out the furnace-building mold vertically and upwards while the mold is hot, wherein the surface roughness of the outer wall of the furnace-building mold is less than Ra0.8, the bottom diameter of the furnace-building mold is smaller than the top diameter, a through hole is formed in the bottom of the furnace-building mold, and the diameter of the through hole is greater than 30mm. On the basis of the dry-methodramming of the furnace lining of the intermediate frequency furnace, the method of demolding after ramming the acid furnace lining of the intermediate frequency furnace enables the furnace-building mold to be smoothly taken out by reasonably treating the rammed furnace lining, improves the efficiency of building the furnace, prolongs the service life of the furnace lining and reduces the cost ofbuilding the furnace.

Description

technical field [0001] The invention relates to the field of intermediate frequency induction furnace building, in particular to a method for demoulding the acid lining of a knotted intermediate frequency furnace. Background technique [0002] At present, the knotting methods of the intermediate frequency furnace lining are mainly divided into dry method and wet method. Among them, if the intermediate frequency furnace lining is knotted by the wet method, it is necessary to add water, water glass, brine and other adhesives to the lining knotting material, and the working environment is relatively quiet. Well, it is easy to remove the mold after the lining is knotted, but the wet knotted lining is not dense enough, the refractoriness of the lining is reduced, and it takes a long time to bake the furnace, which has low efficiency, high energy consumption and high cost. Therefore, in some large-scale intermediate frequency furnaces or intermediate frequency furnaces for smeltin...

Claims

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Application Information

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IPC IPC(8): B28B13/06C04B35/66C04B35/14
CPCB28B13/065B28B13/067C04B35/14C04B35/66C04B2235/3409
Inventor 贾中帅王继平周鑫张斌王志鹏韩淑霞张军李佳君
Owner BAOTOU IRON & STEEL GRP