阅读说明：本技术 一种钢包座砖周围用低成本自流浇注料及其制法 (Low-cost self-flow castable for periphery of ladle pocket brick and preparation method thereof ) 是由 金少虎 彭健 李华军 刘同宣 马飞 王璐 于 2021-01-21 设计创作，主要内容包括：一种钢包座砖周围用低成本自流浇注料及其制法,目的是大量利用废渣,降低生产成本；该浇注料按重量百分比的组成为：钛铝酸钙40-80%,电熔刚玉10-40%,活性氧化铝5-15%,铝酸钙水泥2-8%,减水剂0.2-1.2%；其制备方法是先按照其原料配比比例称取各种原料进行混合,在强制式搅拌机中搅拌10分钟搅拌均匀后入库；使用时运至施工现场,先将上述混合料倒入到强制式搅拌机中干搅3-5分钟,然后加水搅拌5-8分钟后浇注至钢包座砖周围；加水量按重量百分比计占自流浇注料的5-7%。(A low-cost self-flow castable used around a ladle brick cup and a preparation method thereof, aiming at utilizing a large amount of waste slag and reducing the production cost; the castable comprises the following components in percentage by weight: 40-80% of calcium titanium aluminate, 10-40% of fused corundum, 5-15% of activated alumina, 2-8% of calcium aluminate cement and 0.2-1.2% of water reducing agent; the preparation method comprises the steps of weighing various raw materials according to the raw material proportion, mixing, stirring uniformly in a forced stirrer for 10 minutes, and warehousing; when in use, the mixture is transported to a construction site, the mixture is poured into a forced mixer to be dry-stirred for 3-5 minutes, and then water is added to be stirred for 5-8 minutes and poured around the ladle brick cup; the water adding amount accounts for 5-7% of the self-flowing castable in percentage by weight.)

1. A low-cost self-flow castable used around a ladle pocket brick is characterized by comprising the following components in percentage by weight: 40-80% of calcium titanium aluminate, 10-40% of fused corundum, 5-15% of activated alumina, 2-8% of calcium aluminate cement and 0.2-1.2% of water reducing agent.

2. The low-cost self-flowing castable for the periphery of the ladle pocket brick as claimed in claim 1, wherein the calcium titanium aluminate is industrial waste residue generated in the production of ferrotitanium by the aluminothermic method, and the waste residue is manually selected, removed of impurities and crushed into required granularity; the main chemical component of the alloy comprises Al₂O₃、TiO₂And CaO, the component contents of which are respectively Al in percentage by weight₂O₃≥72.0%，CaO≥8.0%，TiO₂≤15%。

3. The low-cost self-flow castable for the periphery of the ladle pocket brick as claimed in claim 1 or 2, wherein the grain size of the calcium titanium aluminate and the proportion thereof in the self-flow castable by weight percentage are respectively as follows: 10-30% of the particle size of 5-3 mm; 20-40% of the particle size of 3-1 mm; 10-30% of granularity 0.088-1 mm; the grain size of 0-0.088mm accounts for 0-20%.

4. The low-cost self-flow castable around the ladle seating brick according to claim 1 or 2, wherein the electrically-fused corundum in the self-flow castable comprises two granularities of 0.088-1mm and 0-0.044mm, and the two granularities account for 0-20% and 10-30% of the self-flow castable respectively in percentage by weight.

5. The low-cost self-flowing castable for the periphery of the ladle seating brick according to claim 1 or 2, wherein the fused corundum in the raw material composition is prepared from the following chemical components in percentage by weight: al (Al)₂O₃≥94.5%。

6. A low cost self-flowing castable material for surrounding ladle pocket brick according to claim 1 or 2, characterized in that Al in active alumina in the raw material composition₂O₃The content is more than or equal to 99.0%, and the particle size is 3-5 mu m.

7. The low-cost self-flowing castable for the periphery of the ladle pocket brick as claimed in claim 1 or 2, wherein the calcium aluminate cement in the raw material composition has the following chemical component requirements: al (Al)₂O₃≥68.5%，CaO≤31%。

8. The low-cost self-flow castable around the ladle seating brick as claimed in claim 1 or 2, wherein the water reducing agent is one or a mixture of more of FS-20, ADS1 and ADW1 in any proportion.

9. The method for preparing the low-cost self-flow castable around the ladle seating brick according to claim 1 or 2, characterized in that:

(1) weighing various raw materials according to the raw material proportion, mixing, stirring uniformly in a forced stirrer for 10 minutes, and warehousing;

(2) the mixture is poured into a forced mixer to be dry-stirred for 3-5 minutes, and then water is added to be stirred for 5-8 minutes and poured around the ladle brick cup; the water adding amount accounts for 5-7% of the self-flowing castable in percentage by weight.

Technical Field

The invention belongs to the field of refractory materials, and relates to recycling of industrial waste residue titanium-iron slag (calcium titanium aluminate) generated in the production of ferrotitanium by an aluminothermic process, which is used for producing a low-cost self-flow castable around a ladle brick cup.

Background

The ferrotitanium alloy is an important raw material for producing high-quality steel such as chain steel, welding rods, electronic products, military products and the like. With the increase of the demand of the ferrotitanium alloy, more and more industrial waste residue is generated. The accumulation of a large amount of waste residues not only pollutes the environment, but also occupies a large amount of land and can cause serious waste of resources. In recent years, China advocates green and environment-friendly sustainable development strategy vigorously, and in addition, the influence of severe weather such as haze and the like makes the maximum resource utilization of environmental protection and waste residues urgent. How to effectively utilize the waste residues is undoubtedly an internationally recognized effective way for protecting the environment and utilizing resources. At present, the surplus of the refractory material in China is very obvious, structural surplus is changed into comprehensive surplus, so that a plurality of enterprises are subjected to low-price competitive marketing, the market order is disordered, the profit space is continuously extruded, meanwhile, the steel industry also develops to the stage of surplus of the refractory material and narrow profit space, and in order to reduce the cost, each steel enterprise usually adopts the principle of low-price bidding, so that how to repeatedly and circularly utilize a large amount of eliminated waste raw materials effectively reduces the production cost on the basis of not changing the original performance, and the refractory material is a great problem in front of each refractory material enterprise when living in the large environment.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a low-cost self-flow castable for the periphery of a ladle brick cup and a preparation method thereof. Compared with the method of directly using a large amount of electric melting corundum in the same industry, the method uses calcium titanium aluminate as a main raw material in the ingredients, not only utilizes a large amount of waste residues, but also can obviously reduce the production cost, and has considerable economic benefit. The invention can provide a method for comprehensively utilizing ferrotitanium slag for ferrotitanium alloy smelting enterprises, and through comprehensive utilization of ferrotitanium slag, waste is turned into wealth and is fully utilized, the pollution of waste slag solids to the environment is reduced, and the environmental benefit is remarkable.

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

a low-cost self-flowing material for the periphery of a ladle pocket brick comprises the following components in percentage by weight: 40-80% of calcium titanium aluminate, 10-40% of fused corundum, 5-15% of activated alumina, 2-8% of calcium aluminate cement and 0.2-1.2% of water reducing agent.

The titanium calcium aluminate is industrial waste residue generated in the production of ferrotitanium by an aluminothermic method, and the waste residue is manually selected, removed of impurities and crushed into required granularity. The main chemical component of the alloy is Al₂O₃、TiO₂And three CaO, which are respectively Al in percentage by weight₂O₃≥72.0%，CaO≥8.0%，TiO₂≤15%。

The particle size composition of the calcium titanium aluminate is four specifications of 5-3mm, 3-1mm, 0.088-1mm and 0-0.088 mm; the weight percentage of the self-flowing castable is respectively 10-30%, 20-40%, 10-30% and 0-20%.

The electric melting corundum comprises two particle sizes of 0.088-1mm and 0-0.044mm, and the two particle sizes respectively account for 0-20% and 10-30% of the self-flowing castable in percentage by weight. The chemical component Al of the electro-fused corundum₂O₃≥94.5%。

Al in the activated alumina₂O₃The content is more than or equal to 99.0%, and the particle size is 3-5 mu m. The chemical component Al of the calcium aluminate cement₂O₃More than or equal to 68.5 percent and less than or equal to 31 percent of CaO. What is needed isThe water reducing agent is one or a mixture of more of FS-20, ADS1 and ADW1 in any proportion, and is added into the components according to the weight ratio.

The preparation method of the low-cost self-flow castable for the periphery of the ladle seating brick comprises the following steps:

(1) weighing various raw materials according to the proportion of the raw materials, firstly mixing, stirring uniformly in a forced stirrer for 10 minutes, packaging and warehousing.

(2) And (3) transporting to a construction site, pouring the mixture into a forced mixer, stirring for 3-5 minutes, adding water, stirring for 5-8 minutes, and then pouring to the periphery of the ladle brick cup, wherein the added water accounts for 5-7% of the gravity flow castable in percentage by weight.

By adopting the technical scheme, the invention comprehensively utilizes the titanium-iron slag (calcium titanium aluminate) generated in the production of the ferrotitanium alloy by the aluminothermic process, and compared with the direct large-scale use of the electro-fused corundum in the same industry, the calcium titanium aluminate is used as the main raw material in the ingredients, thereby not only being beneficial to waste slag, but also obviously reducing the production cost, having considerable economic benefit and obvious environmental benefit.

Detailed Description

The invention is further illustrated by the following examples.

Example 1:

and (3) manually selecting calcium titanium aluminate, removing impurities and crushing. And (3) passing the crushed calcium titanium aluminate particles through a vibrating screen, wherein the calcium titanium aluminate particles are required to contain the following four particle sizes: 3-5mm,1-3mm,0.088-1mm and fine powder 0-0.088 mm. Weighing the following raw materials in percentage by weight of the self-flowing castable: 3-5mm of calcium titanium aluminate: 20 percent; 1-3mm of calcium titanium aluminate: 25 percent; 0.088-1mm of calcium titanium aluminate: 20 percent; 0-0.088mm of calcium titanium aluminate: 15 percent; 0-0.044mm of fused corundum: 10 percent; 3-5 μm of activated alumina: 7.8 percent; 2% of calcium aluminate cement; FS-20: 0.2 percent.

The preparation method of the low-cost self-flow castable for the periphery of the ladle seating brick comprises the following steps

(1) The raw materials are firstly mixed, stirred evenly in a forced stirrer for 10 minutes, and finally packaged and put in storage.

(2) In a construction site, the prepared ladle brick cup is poured into a forced mixer for dry stirring for 3-5 minutes by using a low-cost self-flowing casting material around the ladle brick cup, then water is added for stirring for 5-8 minutes and then the mixture is poured around the ladle brick cup, and the added water accounts for 5-7 percent of the self-flowing casting material in percentage by weight.

The self-flow castable produced according to the embodiment 1 is mainly suitable for the service life of the brick cup about 25 to 30 times. The castable is used on a 180-ton ladle in a certain steel plant, the service life of the brick cup of the steel plant is 25-30 times, the pouring thickness is 440mm, the original fused corundum self-flow castable is used, and after the tapping is carried out for 25-30 times, the residual thickness is 380-400 mm; after the low-cost titanium aluminate self-flow castable is used and the line is finished for 25-30 times, the residual thickness is 385-400mm, and the residual thickness is the same. But compared with the production cost of the two, the cost of the invention is 2000 yuan/ton lower than that of the original electrofusion corundum.

Example 2:

and (3) manually selecting calcium titanium aluminate, removing impurities and crushing. And (3) passing the crushed calcium titanium aluminate particles through a vibrating screen, wherein the calcium titanium aluminate particles are required to contain the following two particle sizes: 3-5mm and 1-3 mm. Weighing the following raw materials in percentage by weight of the self-flowing castable: 3-5mm of calcium titanium aluminate: 15 percent; 1-3mm of calcium titanium aluminate: 25 percent; 0.088-1mm of fused corundum: 20 percent; 0-0.044mm of fused corundum: 20 percent; 3-5 μm of activated alumina: 10.8 percent; 8% of calcium aluminate cement; ADS 1: 0.8 percent; ADW 1: 0.4 percent.

The preparation method of the self-flowing castable comprises the following steps:

(1) the raw materials are firstly mixed, stirred evenly in a forced stirrer for 10 minutes, and finally packaged and put in storage.

(2) In a construction site, the prepared ladle brick cup is poured into a forced mixer for dry stirring for 3-5 minutes by using a low-cost self-flowing casting material around the ladle brick cup, then water is added for stirring for 5-8 minutes and then the mixture is poured around the ladle brick cup, and the added water accounts for 5-7 percent of the self-flowing casting material in percentage by weight.

The self-flow castable produced according to the embodiment 2 is suitable for the service life of the brick cup about 45-50 times. The castable is used on a 260-ton ladle in a certain steel plant, the service life of the brick cup of the steel plant is 45-50 times, the pouring thickness is 450mm, the original fused corundum self-flow castable is used, and after the steel ladle is offline for 45-50 times, the residual thickness is 360 plus 380 mm; after the low-cost titanium aluminate self-flow castable is used and offline for 45-50 times, the residual thickness is 360-380mm, and the residual thickness is the same. But compared with the production cost of the two, the cost of the invention is 1000 yuan/ton lower than that of the prior electrofused corundum.

The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, which should be covered in the claims of the present invention.