CN114213154B

CN114213154B - Preparation method of high-temperature strong-radiation black glaze for cast furnace door bricks

Info

Publication number: CN114213154B
Application number: CN202111493633.7A
Authority: CN
Inventors: 程伦; 董良军; 陆国峰; 程茜
Original assignee: Yixing Dingshan Refractory Material Co ltd
Current assignee: Yixing Dingshan Refractory Material Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2023-02-21
Anticipated expiration: 2041-12-08
Also published as: CN114213154A

Abstract

The invention discloses a preparation method of a high-temperature strong-radiation black glaze for pouring furnace door tiles, which is characterized in that a colorant is added into raw materials for preparing the glaze to improve the softening temperature of the finished glaze, so that the wear resistance of the glaze is improved, chromium oxide in the colorant is stable in chemical property and is not easy to react with acid, alkali and the like, the corrosion of coke tar can be well resisted, the fluidity of the glaze is better and the surface is smoother after the colorant is added, the friction of coke and the adhesion effect of tar can be effectively reduced, the glaze can radiate energy outwards while absorbing heat, as the size of grains is smaller after the colorant is sintered at high temperature, the reflection and absorption of electromagnetic waves generated by heat radiation among the grains are more, the internal energy formed by conversion is more, the glaze absorbs heat and raises the temperature more quickly after the colorant is added, and the energy radiated outwards by the glaze is more when the heat balance state is reached, namely the temperature of the glaze is higher.

Description

Preparation method of high-temperature strong-radiation black glaze for cast furnace door bricks

Technical Field

The invention relates to preparation of refractory materials, in particular to a preparation method of high-temperature strong-radiation black glaze for a cast furnace door brick.

Background

The cordierite furnace door bricks for the traditional coke furnace can not meet the higher and higher production requirements gradually due to the problems of short service life, long maintenance time, complicated replacement steps and the like, and the yield of coke is severely restricted. On the premise, the integrally cast large-scale glazed cordierite furnace door brick has been developed in the industry, and compared with the traditional furnace door brick, the integrally cast large-scale glazed cordierite furnace door brick has the advantages of longer service life, easier replacement, thinner furnace door, more coal which can be loaded and capability of effectively improving the coke yield. However, the problem is that the heat is more dissipated after the furnace door is thinned, and the temperature is at the bottom of the furnace door, so that the phenomenon of coke formation is caused.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a preparation method of a high-temperature strong-radiation black glaze for a pouring furnace door brick, which has excellent fire resistance, can avoid the corrosion of coke and tar and improve the heat preservation performance.

The technical scheme is as follows: the preparation method of the high-temperature strong-radiation black glaze for the cast furnace door brick comprises the following steps of:

(1) Preparing a coloring agent: mixing chromium oxide and copper oxide in proportion, adding water, putting into a ball barrel for co-grinding, taking out a co-ground finished product, drying, finally, preserving heat, firing, cooling and taking out for later use;

(2) Preparing glaze: taking 50-70% of spodumene, 10-20% of feldspar, 10-20% of talcum and 3-7% of zirconium dioxide in parts by weight as raw materials, adding a coloring agent and water, putting the raw materials into a ball barrel, and grinding the raw materials for 24 hours;

(3) Glazing and firing: uniformly spraying glaze water on the surface of the furnace door brick by using a high-pressure spray gun, and then placing the furnace door brick into a tunnel kiln for firing, wherein the firing temperature is 1200-1300 ℃.

In above-mentioned technical scheme, through adding the colorant in the raw materials of preparing the glaze, improve the softening temperature of glazing, and then improve the wearability of glaze, thereby improve mobility simultaneously and make the glaze more smooth effectively avoid the influence that the adhesion erosion of coke, tar led to the fact the glaze, improve the electromagnetic wave absorption that produces the thermal radiation through the colorant and guaranteed that furnace door internal surface temperature is higher when reaching thermal balance.

Preferably, in the step (1), the component proportions of the chromium oxide and the copper oxide are 60 to 90% and 10 to 40% in parts by weight, respectively.

Preferably, in step (1), water is added in an amount of 60% by weight.

Preferably, in the step (1), the ball barrel is put into the ball barrel for co-milling for 24 hours.

Preferably, in the step (1), the temperature during the heat-retaining firing is 1200 to 1300 ℃.

Preferably, in the step (2), the colorant component is additionally added in a proportion of 5 to 15%.

Preferably, in the step (2), the component ratio of the additionally added water is 60%.

Preferably, in the step (3), the thickness of the glaze surface is controlled to be 1-2 mm during spraying.

Has the beneficial effects that: compared with the prior art, the invention has the following remarkable advantages: 1. the softening temperature of the glaze is improved by adding the coloring agent, so that the wear resistance of the glaze is improved; 2. the chromium oxide in the colorant has stable chemical property, is not easy to react with acid, alkali and the like, and can well resist the corrosion of coke tar; 3. after the coloring agent is added, the fluidity of the glaze is better, the glaze surface is smoother, and the friction of coke and the adhesion effect of tar can be effectively reduced; 4. the glaze surface can radiate energy outwards while absorbing heat, and because the grain size is smaller after the coloring agent is sintered at high temperature, the reflection and absorption of electromagnetic waves generated by heat radiation among the grains are more, the internal energy formed by conversion is more, so the glaze surface can absorb heat and raise the temperature more quickly after the coloring agent is added, the energy radiated outwards by the glaze surface is more when the heat balance state is reached, namely the temperature of the glaze surface is higher, and the phenomenon of coking is avoided.

Drawings

FIG. 1 is a flow chart of the steps of the present invention.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings.

As shown in fig. 1, the preparation method of the high-temperature strong-radiation black glaze for the cast furnace door brick comprises the following steps:

(1) Preparing a coloring agent: mixing 60-90% of chromium oxide and 10-40% of copper oxide in parts by weight, adding 60% of water, putting the mixture into a ball barrel, grinding the mixture for 24 hours, taking out the ground finished product, drying the finished product, burning the finished product at 1200-1300 ℃, cooling the finished product, and taking out the finished product for later use;

(2) Preparing glaze: taking 50-70% of spodumene, 10-20% of feldspar, 10-20% of talcum and 3-7% of zirconium dioxide in parts by weight as raw materials, adding 5-15% of coloring agent and 60% of water into a ball barrel, and co-grinding for 24 hours;

(3) Glazing and firing: uniformly spraying glaze water on the surface of the furnace door brick by using a high-pressure spray gun, controlling the thickness of the glaze to be 1-2 mm, and then placing the glaze into a tunnel kiln for firing at the temperature of 1200-1300 ℃.

Claims

1. A preparation method of a high-temperature strong-radiation black glaze for a cast furnace door brick is characterized by comprising the following steps:

(2) Preparing glaze: taking 50-70% of spodumene, 10-20% of feldspar, 10-20% of talcum and 3-7% of zirconium dioxide in parts by weight as raw materials, adding a coloring agent and water, putting the raw materials into a ball barrel, and grinding for 24 hours;

(3) Glazing and firing: uniformly spraying glaze water on the surface of the furnace door brick by using a high-pressure spray gun, and then placing the furnace door brick into a tunnel kiln for firing at the firing temperature of 1200-1300 ℃;

in the step (1), the components of the chromium oxide and the copper oxide are respectively 60-90% and 10-40% in proportion; the proportion of the added water is 60 percent; the temperature for heat preservation and firing is 1200-1300 ℃.

2. The method for preparing high-temperature strong radiation black glaze for cast furnace door blocks according to claim 1, wherein in the step (1), the placing in a ball barrel and the co-milling are carried out for 24 hours.

3. The method for preparing high-temperature strong radiation black glaze for cast furnace door blocks according to claim 1, wherein in the step (2), the proportion of the additional colorant component is 5-15%.

4. The method for preparing high-temperature strong radiation black glaze for cast furnace door blocks according to claim 1, wherein in the step (2), the proportion of the additionally added water is 60%.

5. The method for preparing the high-temperature strong radiation black glaze for the gating brick of the pouring furnace according to claim 1, wherein in the step (3), the thickness of the glaze is controlled to be 1-2 mm during spraying.