Preparation method of newly-constructed taphole duct
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A technology of tapholes and tunnels, which is applied in the field of preparation of tunnels for new masonry tapholes, can solve problems such as sputtering of tapholes in newly opened furnaces, and achieve the effects of ensuring accuracy, high compactness, and solving sputtering of tapholes
Inactive Publication Date: 2019-09-03
ANGANG STEEL CO LTD
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a method for preparing a new masonry taphole tunnel, which can improve the compactness of the taphole tunnel filling, is beneficial to control the ring crack of the taphole, and solve the problem of sputtering of the taphole in a newly opened furnace
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preparation example Construction
[0020] A method for preparing a new masonry tunnel, comprising the following steps:
[0021] 1) Use compressed air to clean the reserved hole of the newly built iron hole channel;
[0022] 2) The wall of the iron mouth ceramic cup in the hearth is sealed with a 15mm-25mm thick pouring template;
[0023] 3) Use corundum aluminum castables with a refractoriness ≥ 1500°C to cast the reserved holes of the tap hole at one time, and use a vibrating rod to vibrate the air bubbles in the refractory castables, and the vibration time is 1min-2min;
[0024] 4) Natural drying for 24h-36h, no contact with water vapor during the drying period;
[0025] 5) Determine the position of the center line of the iron hole, and use a drilling machine to drill the castable material with the same diameter as the hole in the hole to form the hole in the hole.
Embodiment
[0027] New blast furnace, the diameter of the hole reserved for the tap hole is 300mm, and the diameter of the tap hole is 80mm.
[0028] A method for preparing a new masonry tunnel, comprising the following steps:
[0029] 1) Use compressed air to clean the reserved hole of the newly built iron mouth channel to ensure that it is clean and free from dust.
[0030] 2) The wall of the iron mouth ceramic cup in the hearth is sealed with a 20mm thick pouring formwork to ensure tightness.
[0031] 3) Stir the high-quality iron trench castable evenly for 5 minutes, pour the reserved holes of the iron gate channel at one time, and vibrate the bubbles of the castable with a vibrating rod for 1 minute to ensure the compactness.
[0032] 4) Naturally dry for 24 hours, and ensure that it cannot be exposed to water vapor during the period.
[0033] 5) Set the opening at the center line of the iron mouth, and use a drill bit with a diameter of 80mm to drill holes in the channel castable ...
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Abstract
The invention relates to a preparation method of a newly-constructed taphole duct. The preparation method comprises the steps of (1), cleaning reserved holes of the newly-constructed taphole duct by using compressed air; (2), sealing a ceramic duct wall of thetaphole duct in a furnace hearth with a casting template with a thickness of 15mm - 25mm; (3), carrying out one-time casting on the reservedholes of the taphole channel by adopting refractory casting materials, and vibrating bubbles in the refractory casting materials by using a vibrating rod, wherein the vibration time is 1 min - 2 min;(4), naturally drying the reserved holes of the taphole channel for 24h - 36h, no contact with water vapor during drying; and (5), determing the position of a center line opening of a taphole, and drilling the refractory casting materials in a duct to form the taphole duct by using a drill bit with the diameter being the same as the diameter of the taphole duct. Compared with the duct manually filled with steeming, the integral casting has the advantages that the compactness of the duct is higher, no gap exists, and ring cracking is not easy to occur; the integrity of the duct filling is ensured, the phenomenon of gas string in the taphole duct is controlled, and the problem of taphole splashing is solved; the method has the advantages that the formation of a mud drum is facilitated, thelong service life of the furnace hearth is ensured, and the labor intensity is reduced.
Description
technical field [0001] The invention relates to an iron-making blast furnace, in particular to a method for preparing a new masonry iron hole tunnel. Background technique [0002] For newly built blast furnaces or overhauled blast furnaces with rebuilt hearth carbon bricks, round holes with a diameter of 250-300mm are generally reserved at the taphole hole, while the diameter of the normal working taphole hole is 80mm, and the remaining part needs to be filled to ensure the normal operation of the taphole. In the past, it was filled manually with gun mud, which was prone to ring cracking. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing a new masonry taphole tunnel, which can improve the compactness of the taphole tunnel filling, is beneficial to control the ring cracking of the taphole, and solve the problem of sputtering of the taphole when a newly opened furnace is opened. [0004] To ac...
Claims
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Application Information
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