阅读说明：本技术 一种免烘烤低能耗再生钢包砖及其制备方法 (Baking-free low-energy-consumption regenerated ladle brick and preparation method thereof ) 是由 樊春霞 秦振敏 郑丽东 于 2020-07-21 设计创作，主要内容包括：本发明公开了一种免烘烤低能耗再生钢包砖及其制备方法,涉及再生钢包砖技术领域,其中,该免烘烤低能耗再生钢包砖,包括以下按照重量份计的原料：废镁碳砖颗粒70-80份、镁砂10-15份、镁砂粉15-20份、结合剂3-5份本发明提供的免烘烤低能耗再生钢包砖,主要采用回收传统钢包砖使用后残留部分再利用,变废为宝,大大降低了固体废物的排放,减少环境污染,也有效降低了矿产资源的浪费。(The invention discloses a baking-free low-energy-consumption regenerated ladle brick and a preparation method thereof, and relates to the technical field of regenerated ladle bricks, wherein the baking-free low-energy-consumption regenerated ladle brick comprises the following raw materials in parts by weight: 70-80 parts of waste magnesia carbon brick particles, 10-15 parts of magnesia, 15-20 parts of magnesia powder and 3-5 parts of a bonding agent.)

1. The baking-free low-energy-consumption regeneration ladle brick is characterized by comprising the following raw materials in parts by weight: 70-80 parts of waste magnesia carbon brick particles, 10-15 parts of magnesia, 15-20 parts of magnesia powder and 3-5 parts of a bonding agent.

2. The baking-free low-energy-consumption regeneration ladle brick as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight: 73-78 parts of waste magnesia carbon brick particles, 12-14 parts of magnesia, 17-19 parts of magnesia powder and 3.5-4.5 parts of a bonding agent.

3. The baking-free low-energy-consumption regeneration ladle brick as claimed in claim 2, which is characterized by comprising the following raw materials in parts by weight: 75 parts of waste magnesia carbon brick particles, 13 parts of magnesia, 18 parts of magnesia powder and 4 parts of a bonding agent.

4. The baking-free low-energy-consumption recycled ladle brick as claimed in any one of claims 1 to 3, wherein the particle size of the waste magnesia carbon brick particles is 1-5 mm.

5. The baking-free low-energy-consumption recycled ladle brick as claimed in any one of claims 1 to 3, wherein the magnesia has a particle size of 0.1 to 1 mm.

6. The baking-free low-energy-consumption recycled ladle brick as recited in any one of claims 1 to 3, wherein the magnesite powder is 200-mesh magnesite powder.

7. The preparation method of the baking-free low-energy-consumption recycled ladle brick according to any one of claims 1 to 6, characterized by comprising the following steps:

step one, stirring waste magnesia carbon brick particles, magnesia and a bonding agent for 1-5 minutes;

adding magnesia powder and stirring for 10-20 min;

step three, ageing the mixture for 3 to 5 hours;

and step four, pressing and forming by a brick press.

8. The preparation method of the baking-free low-energy-consumption recycled ladle brick as claimed in claim 7, characterized by comprising the following steps:

step one, stirring waste magnesia carbon brick particles, magnesia and a bonding agent for 3 minutes;

adding magnesia powder and stirring for 15 minutes;

step three, ageing for 4 hours;

and step four, pressing and forming by a brick press.

9. The method for preparing the baking-free low-energy-consumption recycled ladle brick as claimed in claim 7, wherein in the fourth step, a 630-ton brick press is adopted.

10. The method for preparing the baking-free low-energy-consumption recycled ladle brick as claimed in claim 7, wherein a common ladle is built to a ladle opening, 3 layers of ladle brick positions are reserved, ladle fire clay is uniformly coated for 1mm, the baking-free low-energy-consumption recycled ladle brick is built again, and the ladle is preheated to the tapping temperature before being used on line to directly tap steel.

Technical Field

The invention relates to the technical field of regenerative ladle bricks, in particular to a baking-free low-energy-consumption regenerative ladle brick and a preparation method thereof.

Background

The main raw materials of the traditional ladle brick are fused magnesia, high-alumina bauxite, corundum and the like, and the ladle brick is prepared by smelting and decomposing ores at high temperature, and the auxiliary raw materials comprise graphite and asphalt; the binding agent is mainly liquid phenolic resin; the mixture is pressed and formed through reasonable gradation, and is baked for 24 hours at the temperature of 200 ℃ for dehydration and degassing.

The ladle brick comprises magnesia carbon brick, alumina-magnesia carbon brick and spinel carbon brick according to the material composition; according to the using parts: the brick comprises a bottom brick, an impact area brick, a wall-covering slag line brick, a wall-covering slag line brick and a mouth-covering brick.

The search shows that Chinese patent with publication number CN109879662A discloses a method for producing magnesia carbon bricks or magnesia-alumina carbon bricks by using small microparticles of waste magnesia carbon bricks as main materials, which is prepared by mixing small microparticles of waste magnesia carbon bricks, bauxite or/and corundum or/and spinel or/and fused magnesia or/and sintered magnesia granules and additives; the method takes the small microparticles of the waste magnesia carbon bricks which are idle for a long time to be stockpiled as the main raw material to prepare the magnesia carbon bricks or the magnesia alumina carbon bricks, thereby realizing the purpose of using the small microparticles of the waste magnesia carbon bricks as a main raw material and changing waste into valuable, greatly reducing the production cost, saving the space, reducing the cost of each ton of bricks by 1000 plus one 1800 yuan, completely meeting the use requirements of customers for the dried magnesia carbon bricks or the magnesia alumina carbon bricks, having the use effect equivalent to the quality level of the magnesia carbon bricks or the magnesia alumina carbon bricks produced by the conventional method, and having the actual use effect even exceeding that of the conventional magnesia carbon bricks or the magnesia alumina carbon bricks in some specific use environments;

for example, chinese patent publication No. CN101333089 discloses a method for producing magnesia carbon bricks from waste magnesia carbon bricks as main raw materials, which comprises the following steps of using 62-98 parts of waste magnesia carbon bricks as main raw materials, 0-47 parts of magnesia and 0.2-15 parts of additives: sorting and homogenizing: grading the recycled waste magnesia carbon bricks, and blending according to batches, so that the proportion of the recycled waste bricks with the same material and different components tends to be balanced; (II) crushing: crushing the homogenized waste magnesia carbon bricks into granules and powder with the diameter of less than 12 mm; (III) mixing materials: sequentially adding the crushed waste magnesia carbon brick granules and powder, magnesia and additives into a stirrer, and adding a proper amount of bonding agent according to the total amount of the materials to stir uniformly; (IV) forming: pressing and molding the uniformly stirred wet material on a press machine, then putting the material into a furnace for drying, and keeping the material at the temperature of 110-250 ℃ for 12 hours to obtain a finished product.

However, in the above two technical solutions and other prior arts, the regenerated ladle brick needs to be dried, which increases the exhaust gas emission and environmental pollution, and therefore, a baking-free low-energy-consumption regenerated ladle brick and a preparation method thereof are needed to solve these problems.

Disclosure of Invention

The invention aims to provide a baking-free low-energy-consumption regeneration ladle brick to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the baking-free low-energy-consumption regeneration ladle brick comprises the following raw materials in parts by weight: 70-80 parts of waste magnesia carbon brick particles, 10-15 parts of magnesia, 15-20 parts of magnesia powder and 3-5 parts of a bonding agent.

As a further scheme of the invention: the baking-free low-energy-consumption regeneration ladle brick comprises the following raw materials in parts by weight: 73-78 parts of waste magnesia carbon brick particles, 12-14 parts of magnesia, 17-19 parts of magnesia powder and 3.5-4.5 parts of a bonding agent.

As a further scheme of the invention: the baking-free low-energy-consumption regeneration ladle brick comprises the following raw materials in parts by weight: 75 parts of waste magnesia carbon brick particles, 13 parts of magnesia, 18 parts of magnesia powder and 4 parts of a bonding agent.

As a further scheme of the invention: the particle size of the waste magnesia carbon brick particles is 1-5 mm.

As a further scheme of the invention: the particle size of the magnesia is 0.1-1 mm.

As a further scheme of the invention: the magnesia powder is 200-mesh magnesia powder.

The invention also aims to provide a preparation method of the baking-free low-energy-consumption regeneration ladle brick, which comprises the following steps:

step one, stirring waste magnesia carbon brick particles, magnesia and a bonding agent for 1-5 minutes;

adding magnesia powder and stirring for 10-20 min;

step three, ageing the mixture for 3 to 5 hours;

and step four, pressing and forming by a brick press.

As a further scheme of the invention: the preparation method of the baking-free low-energy-consumption regeneration ladle brick comprises the following steps:

step one, stirring waste magnesia carbon brick particles, magnesia and a bonding agent for 3 minutes;

adding magnesia powder and stirring for 15 minutes;

step three, ageing for 4 hours;

and step four, pressing and forming by a brick press.

As a further scheme of the invention: in the fourth step, a 630-ton brick press is adopted.

As a further scheme of the invention: building a common steel ladle to a ladle opening, reserving 3 layers of steel ladle brick positions, uniformly coating fire mud on the steel ladle for 1mm, building baking-free low-energy-consumption regeneration steel ladle bricks, and directly tapping before online use along with preheating the steel ladle to tapping temperature.

Compared with the prior art, the invention has the beneficial effects that: the baking-free low-energy-consumption recycled ladle brick provided by the invention mainly recycles the residual part of the traditional ladle brick after use, changes waste into valuable, greatly reduces the emission of solid waste, reduces environmental pollution, and effectively reduces the waste of mineral resources.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.