阅读说明：本技术 一种将废弃钢包镁碳砖进行回收利用的补炉工艺 (Fettling process for recycling waste ladle magnesia carbon bricks ) 是由 刘勇 于 2021-02-01 设计创作，主要内容包括：本发明公开了一种将废弃钢包镁碳砖进行回收利用的补炉工艺,包括以下步骤：1、将1T经破碎的废弃钢包镁碳砖装入废钢斗里；2、出完钢后直接往炉前摇炉,根据大面侵蚀情况将炉体摇至适当的位置；3、将废钢斗中的废弃镁碳砖倒入炉体内,然后继续向下摇炉,使镁碳砖摊平并使炉渣完全覆盖于镁碳砖表面；4、静置5分钟,使垫补的部位通过重力将废弃镁碳砖沉淀在该位置,烧结过程中废弃的镁碳砖与炉渣发生化学反应,在炉衬表面生成一层高熔点的矿物质；5、然后将炉体摇直,进行溅渣护炉,即完成补炉；其中炉渣中MgO>8％,碱度>2.8。(The invention discloses a fettling process for recycling waste ladle magnesia carbon bricks, which comprises the following steps: 1. filling the crushed waste ladle magnesia carbon bricks of 1T into a waste steel hopper; 2. directly shaking the furnace in front of the furnace after steel is discharged, and shaking the furnace body to a proper position according to the large-area erosion condition; 3. pouring the waste magnesia carbon bricks in the waste steel hopper into the furnace body, and then continuing to shake the furnace downwards to flatten the magnesia carbon bricks and completely cover the slag on the surface of the magnesia carbon bricks; 4. standing for 5 minutes to ensure that the shimming part deposits the waste magnesia carbon bricks at the position through gravity, and the waste magnesia carbon bricks and the furnace slag are subjected to chemical reaction in the sintering process to generate a layer of high-melting-point mineral substances on the surface of the furnace lining; 5. then the furnace body is shaken straight, slag splashing and furnace protection are carried out, and furnace repairing is finished; wherein MgO in the slag is more than 8 percent, and the alkalinity is more than 2.8.)

1. A fettling process for recycling waste ladle magnesia carbon bricks is characterized by comprising the following steps: 1. filling the crushed waste ladle magnesia carbon bricks of 1T into a waste steel hopper; 2. directly shaking the furnace in front of the furnace after steel is discharged, and shaking the furnace body to a proper position according to the large-area erosion condition; 3. pouring the waste magnesia carbon bricks in the waste steel hopper into the furnace body, and then continuing to shake the furnace downwards to flatten the magnesia carbon bricks and completely cover the slag on the surface of the magnesia carbon bricks; 4. standing for 5 minutes to ensure that the shimming part deposits the waste magnesia carbon bricks at the position through gravity, and the waste magnesia carbon bricks and the furnace slag are subjected to chemical reaction in the sintering process to generate a layer of high-melting-point mineral substances on the surface of the furnace lining; 5. then the furnace body is shaken straight, slag splashing and furnace protection are carried out, and furnace repairing is finished; wherein MgO in the slag is more than 8 percent, and the alkalinity is more than 2.8.

Technical Field

The invention relates to a fettling process for recycling waste ladle magnesia carbon bricks.

Background

After the refined steel ladles of the current eight-steel second steel plant are off-line, the dismantled residual bricks (magnesia carbon bricks) are basically abandoned and cannot be well recycled, so that the resource waste is caused. The main method of furnace repairing of 120t converter in the second eight-steel plant is to repair the furnace by using a pig iron block, if necessary, a large fabric is used for repairing the furnace, high-temperature sintering is needed when the large fabric is used for repairing the furnace, the sintering time is long, 2 tons of materials on average can be completely sintered within at least 70 minutes, so that the productivity of the converter is low, the waiting time is long, the repairing materials are not resistant to scouring, and are easy to drop after being subjected to mechanical impact and chemical erosion of molten iron and steel scraps, and the maintenance duration is short. And the lining maintenance is carried out by spreading the pig iron blocks, although the maintenance time is short, the maintenance time is about 10 minutes on average, when the pig iron blocks meet high-temperature slag, the pig iron blocks are easy to melt, and the pig iron melting and heat release have the corrosion reaction on a slag splashing layer.

Disclosure of Invention

The invention aims to provide a fettling process for recycling waste ladle magnesia carbon bricks, which is characterized in that after waste ladle bricks are recycled and properly crushed, fettling is completed by utilizing surplus rhythm time in a production gap of a converter, so that the contradiction between production and lining maintenance can be solved, and the production efficiency of the converter is effectively improved.

The fettling process for recycling the waste ladle magnesia carbon bricks comprises the following steps: 1. filling the crushed waste ladle magnesia carbon bricks of 1T into a waste steel hopper; 2. directly shaking the furnace in front of the furnace after steel is discharged, and shaking the furnace body to a proper position according to the large-area erosion condition; 3. pouring the waste magnesia carbon bricks in the waste steel hopper into the furnace body, and then continuing to shake the furnace downwards to flatten the magnesia carbon bricks and completely cover the slag on the surface of the magnesia carbon bricks; 4. standing for 5 minutes to ensure that the shimming part deposits the waste magnesia carbon bricks at the position through gravity, and the waste magnesia carbon bricks and the furnace slag are subjected to chemical reaction in the sintering process to generate a layer of high-melting-point mineral substances on the surface of the furnace lining; 5. then the furnace body is shaken straight, slag splashing and furnace protection are carried out, and furnace repairing is finished; wherein MgO in the slag is more than 8 percent, and the alkalinity is more than 2.8.

The method is characterized in that the method comprises the steps of recovering waste ladle residual bricks, crushing the waste ladle residual bricks properly, loading the waste ladle residual bricks into a waste steel hopper according to a certain proportion, completing furnace repairing by utilizing surplus rhythm time in a production gap of a converter, rapidly reducing the furnace temperature of the converter after adding the waste magnesia carbon bricks, further separating out high-melting-point substances, rapidly realizing adhesion with high MgO furnace slag, and then performing slag splashing furnace protection, so that rapid furnace repairing can be realized, the contradiction between production and furnace lining maintenance is solved, the production efficiency of the converter is effectively improved, meanwhile, the maintenance time of a large surface is reduced to about 10 minutes from original 70 minutes, and the stable operation of the converter is favorably ensured.

Detailed Description

A fettling process for recycling waste ladle magnesia carbon bricks comprises the following steps: 1. filling the crushed waste ladle magnesia carbon bricks of 1T into a waste steel hopper; 2. directly shaking the furnace in front of the furnace after steel is discharged, and shaking the furnace body to a proper position according to the large-area erosion condition; 3. pouring the waste magnesia carbon bricks in the waste steel hopper into the furnace body, and then continuing to shake the furnace downwards to flatten the magnesia carbon bricks and completely cover the slag on the surface of the magnesia carbon bricks; 4. standing for 5 minutes to ensure that the shimming part deposits the waste magnesia carbon bricks at the position through gravity, and the waste magnesia carbon bricks and the furnace slag are subjected to chemical reaction in the sintering process to generate a layer of high-melting-point mineral substances on the surface of the furnace lining; 5. then the furnace body is shaken straight, slag splashing and furnace protection are carried out, and furnace repairing is finished; wherein MgO in the slag is more than 8 percent, and the alkalinity is more than 2.8.