Silica concrete artifacts for steel-teeming ladles

Abstract

Refractory concretes are used extensively to line steel teeming ladies. The concrete linings are made by monolithic tamping [1-3] and casting [4] methods. Cherubim and Peach [5] give comparative results for the preparation of linings by different procedures.The concretes used as the lining material are as follows: concrete with 95-99 ~# crystalline quartzite, 1-5% slag, and 16-18% slag (above 100% ~ water glass with a density of 1.3 g/cm ~ [61; concrete from quartzite with added clay [7,8]; and silica concrete with a chemical binder [9, 10].

Ways to increase the slag resistance of unfired siliceous articles for teeming ladle linings

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Based on laboratory investigations and industrial tests, the expediency and efficiency of using unfired siliceous articles produced with addition of milled chromite to a quartz charge for linings of slag belts of teeming ladles is established.

Teeming ladles are laid for the most part with chamotte articles produced by various refractory enterprises [1]. The endurance of the lining of the slag belt of a teeming ladle made of these refractories exceeds that of chamotte and high-alumina refractories by a factor of 2 -3.The Pervouralsk and Krasnoarmeisk Dinas Plants have organized production of unfired siliceous ladle articles based on a quartz charge and liquid glass [12]. In recent years teeming ladles, including those for out-of-furnace treatment of steel, are laid with basic refractories, namely, fired and unfired forsterite-containing articles, chromite-periclase articles, and periclase-spinellide articles [7 -11 ].

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“…The Pervouralsk and Krasnoarmeisk Dinas Plants have organized production of unfired siliceous ladle articles based on a quartz charge and liquid glass [12]. The endurance of a lining made of unfired siliceous ladle articles used for casting converter steel is 20 -25 pourings with intermediate repair of the lining of the slag belt after 12 -15 pourings.…”