Method for making dry material for tundish by using waste magnesia carbon bricks

Abstract

The invention discloses a method for making a dry material for tundish by using waste magnesia carbon bricks. The method comprises the following steps: 1, respectively conveying main productive raw materials, namely the waste magnesia carbon bricks, as well as magnesia and additives into corresponding stock bins of various production lines for the dry material for tundish by virtue of a hopper anda conveying pipe by utilizing compressed air, sequentially performing accumulative weighing counterweight on main ingredients by adopting a pressure sensor type scale hopper, and burdening the additive stock bin by adopting a self-weighing hopper; 2, performing weight reduction type burdening on the additive stock bin when the main ingredients enter a mixing machine, enabling the additive to directly enter the mixing machine to be mixed with the main ingredients, uniformly mixing by a stirrer, entering a transition stock bin, and selecting ton-bag and small-bag packaging; and 3, determining main components of the magnesia in the dry material in percentage by mass: 93.51% of MgO, 3.85% of SiO2 and 1.71% of CaO, wherein the waste magnesia carbon brick in the dry material comprises the following main components in percentage by mass: 70.96% of MgO, 3.18% of SiO2, 1.61% of CaO and 12.89% of Fe2O3; and the additive is PF-4013 resin.

Description

technical field [0001] The invention relates to a method for manufacturing tundish dry material by using waste magnesia carbon bricks. Background technique [0002] The tundish is the transition device between the crystallizer and the ladle in the steelmaking and continuous casting process. The use of the tundish can make the molten steel injected into the mold better and more smoothly, and can ensure the stability of the molten steel. Therefore, the tundish is used in the steelmaking process. The function is a link between the preceding and the following. Tundish refractory lining mainly includes insulation layer, permanent layer and working layer. [0003] The dry material of the tundish is the material of the working layer lining the tundish, which is in direct contact with molten steel and slag, and is an amorphous refractory material formed by vibration method without adding water or liquid binder. Under the action of vibration, the material can form a dense and unifo...

AI Technical Summary

Problems solved by technology

But the disadvantage is that the cost of raw materials is high, the requirements for construction technology are high, and there are high requirements for the operation level of the tundish working layer of the workers.