CN103252486A

CN103252486A - Knockout method of pouring ladle permanent layer

Info

Publication number: CN103252486A
Application number: CN201310174922XA
Authority: CN
Inventors: 张君平; 李法兴; 王学利; 翟正龙; 孟宪华; 刘亚丽; 于学文
Original assignee: Laiwu Iron and Steel Group Co Ltd
Current assignee: Laiwu Iron and Steel Group Co Ltd
Priority date: 2013-05-13
Filing date: 2013-05-13
Publication date: 2013-08-21

Abstract

The invention discloses a knockout method of pouring a ladle permanent layer. According to an existing technique, after a ladle permanent layer is poured, a ladle with the poured ladle permanent layer and a mold is placed on a vertical ladle stoving device for being stoved and then naturally cools so that the mold can be released from the ladle permanent layer naturally. According to the knockout method of pouring the ladle permanent layer, knockout efficiency of the permanent layer and quality of the permanent layer in time of knockout are improved. The problems of the existing technique are solved.

Description

A kind of release method of pouring into a mould permanent ladle layer

Technical field

The present invention relates to the Ferrous Metallurgy field, particularly, the present invention relates to a kind of release method of pouring into a mould permanent ladle layer.

Background technology

Ladle is the important container that is used for holding the transhipment molten steel in the iron and steel enterprise, generally forms by the ladle body and by the ladle liner that heat-insulation layer, permanent layer, working lining constitute.Permanent ladle layer is called security personnel's layer again, water material feeding and water mixing is integrated poured by a certain percentage by high alumina matter, magnesia or magnesium carbonaceous and form, thickness is at 50～150mm, main effect is when preventing that the ladle working layer is subjected to comprehensive functions such as the high temperature slag washes away, chemical attack, stirring wearing and tearing and causes the thickness attenuation, prevent that the slag leakage from burning out the ladle shell, improve the ladle security, and support and strengthen the ladle heat insulation layer.The cast of permanent ladle layer, demoulding traditional handicraft are: and die surface cleaning → die surface puts the oil → and mould goes into ladle location → permanent layer cast → ladle band mould natural curing → mould separating permanent ladle layer → permanent ladle layer baking.

Mainly there is following problem in this technology: the curing time after the cast of (1) permanent ladle layer is wayward, is difficult to guarantee the permanent layer quality.(2) the permanent layer demoulding and curing time are long, and it is low that ladle is built efficient by laying bricks or stones.(3) after the demoulding baking process is required height.(4) workman working time is long, intensity is big.

Summary of the invention

The objective of the invention is to, a kind of release method of pouring into a mould permanent ladle layer is provided, this method can be carried out the demoulding fast, the quality of permanent layer when having improved permanent layer demoulding efficiency and the demoulding.

For achieving the above object, the present invention has adopted following technical scheme:

A kind of release method of pouring into a mould permanent ladle layer, described method comprise the steps: that the ladle that will pour permanent layer band mould is put on the vertical Ladle-casting apparatus and toast, and cool off naturally the baking back that finishes, and makes mould break away from permanent ladle layer naturally.

Preferably, the ladle that pours permanent layer band mould is put into toasted on the vertical Ladle-casting apparatus 6～14 hours.

Further preferably, the ladle that pours permanent layer band mould is put into earlier little fiery the baking 1～2 hour on the vertical Ladle-casting apparatus, 100 ℃～150 ℃ of temperature are incubated 2～4 hours; The moderate heat baking is 1.5～3 hours again, 200 ℃～250 ℃ of temperature; At last, 200 ℃～250 ℃ insulations of temperature are 1.5～5 hours.

The mould of using, permanent layer are watered material feeding and are the conventional material that uses in this area among the present invention.

The present invention utilizes mould, permanent layer to water material feeding volumetric expansion when being heated, the mould coefficient of expansion waters the characteristic of the material feeding coefficient of expansion greater than permanent layer, the ladle of permanent layer will be poured, not removing mould namely toasts, can play mould and further push permanent layer, improve the effect of permanent layer density.

Volume-diminished when this law utilizes mould, permanent layer to water the material feeding cooling, the characteristic that mould shrinkage coefficient waters material feeding shrinkage coefficient greater than permanent layer, cooling naturally made the mould separating permanent ladle layer after baking finished.

The present invention compared with prior art, its advantage is: the present invention is directed to the deficiencies in the prior art, according to the different characteristic of material coefficient of thermal expansion and contraction, change original cast permanent ladle layer releasing process, permanent layer quality when improving permanent layer demoulding efficiency and the demoulding.

Description of drawings

Fig. 1 is a kind of cast permanent ladle layer of the present invention structural representation;

Fig. 2 is the baking curve of the embodiment of the invention 1;

Wherein: 1, ladle, 2, permanent layer, 3, mould.

The specific embodiment

The present invention is further detailed explanation with the drawings and specific embodiments below.

Embodiment 1

As shown in Figure 1 and Figure 2, a kind of release method of pouring into a mould permanent ladle layer, after existing technology cast ladle 1 permanent layer 2, the ladle 1 usefulness overhead traveling crane handling that pours permanent layer 2 band moulds 3 is put on the flatcar, start flatcar to vertical Ladle-casting apparatus below, open vertical Ladle-casting apparatus burner, adjusting gear is little fire, and flame centering mould 3 is toasted, and toasts 1.2 hours, temperature reaches about 120 ℃, is incubated 3 hours; The adjustment gear is moderate heat, toasts 2 hours, and temperature reaches about 230 ℃, be incubated and close vertical Ladle-casting apparatus burner after 4 hours, leave flatcar, make ladle 1, mould 3 temperature naturally cool to normal temperature, play the mould nose of hanging oneself with the little hook block of overhead traveling crane, slowly play hook, mould 3 breaks away from permanent ladle layer 2.

Embodiment 2

As shown in Figure 1, a kind of release method of pouring into a mould permanent ladle layer, after existing technology cast ladle 1 permanent layer 2, the ladle 1 usefulness overhead traveling crane handling that pours permanent layer 2 band moulds 3 is put on the flatcar, start flatcar to vertical Ladle-casting apparatus below, open vertical Ladle-casting apparatus burner, adjusting gear is little fire, and flame centering mould 3 is toasted, and toasts 1 hour, temperature reaches about 100 ℃, is incubated 2 hours; The adjustment gear is moderate heat, toasts 1.5 hours, and temperature reaches about 200 ℃, be incubated and close vertical Ladle-casting apparatus burner after 1.5 hours, leave flatcar, make ladle 1, mould 3 temperature naturally cool to normal temperature, play the mould nose of hanging oneself with the little hook block of overhead traveling crane, slowly play hook, mould 3 breaks away from permanent ladle layer 2.

Embodiment 3

As shown in Figure 1, a kind of release method of pouring into a mould permanent ladle layer, after existing technology cast ladle 1 permanent layer 2, the ladle 1 usefulness overhead traveling crane handling that pours permanent layer 2 band moulds 3 is put on the flatcar, start flatcar to vertical Ladle-casting apparatus below, open vertical Ladle-casting apparatus burner, adjusting gear is little fire, and flame centering mould 3 is toasted, and toasts 2 hours, temperature reaches about 150 ℃, is incubated 4 hours; The adjustment gear is moderate heat, toasts 3 hours, and temperature reaches about 250 ℃, be incubated and close vertical Ladle-casting apparatus burner after 5 hours, leave flatcar, make ladle 1, mould 3 temperature naturally cool to normal temperature, play the mould nose of hanging oneself with the little hook block of overhead traveling crane, slowly play hook, mould 3 breaks away from permanent ladle layer 2.

The demould time of prior art generally needs 48～65 hours, the difficulty during demoulding, permanent layer surface quality after the demoulding is poor, easily cave in, demould time of the present invention is generally at 16～30 hours, be far smaller than demould time of the prior art, and the demoulding is easy, the permanent layer surface quality after the demoulding is good, be not easy to cave in, can prolong the service life of permanent layer.

Claims

1. release method of pouring into a mould permanent ladle layer, described release method may further comprise the steps: the ladle that will pour permanent layer band mould is put on the vertical Ladle-casting apparatus and toasts, and cool off naturally the baking back that finishes, and makes mould break away from permanent ladle layer naturally.

2. according to the release method of the described cast permanent ladle layer of claim 1, it is characterized in that, the ladle that pours permanent layer band mould is put into toasted on the vertical Ladle-casting apparatus 6～14 hours.

3. according to the release method of claim 1 or 2 described cast permanent ladle layers, it is characterized in that described baking is earlier little fire baking 1～2 hour, 100 ℃～150 ℃ of temperature are incubated 2～4 hours; The moderate heat baking is 1.5～3 hours again, and 200 ℃～250 ℃ of temperature are incubated 1.5～5 hours.