Tundish dry type vibration material taking waste magnesia carbon bricks as raw materials and preparation method thereof

Abstract

The invention relates to a tundish dry type vibration material taking waste magnesia carbon bricks as raw materials and a preparation method thereof. The technical scheme is as follows: mixing 50-80wt% of the waste magnesia carbon bricks, 10-40wt% of fused magnesia or sintered magnesia fine powder, 3-8wt% of binding agent and 0.5-5wt% of additive, evenly stirring, carrying out vibration moulding, baking under the temperature of 200-400 DEG C, and demoulding to obtain the tundish dry type vibration material, wherein the MgO content in the waste magnesia carbon bricks are no less than 70wt%. The invention has the characteristics of simple process, low cost and energy conservation, is environmental friendly, and is convenient in construction. As for the tundish dry type vibration material, the main chemical components are MgO and C, the main crystalline phases are periclase and graphite, the continuous casting rate is high, the metallurgical effect is favorable, and the disassembly is easy after use. The tundish dry type vibration material is mainly applicable to continuous casting of tundish linings. The invention provides a new way for recycling the waste magnesia carbon bricks of a steel mill, and has important significances on energy conservation, consumption reduction and environment protection.

Description

technical field [0001] The invention belongs to the technical field of dry vibrating materials. In particular, it relates to a tundish dry vibrating material using waste magnesia-carbon bricks as a raw material and a preparation method thereof. Background technique [0002] Due to the rapid development of my country's iron and steel metallurgy, cement, ceramics and other high-temperature industries, the demand for refractory materials is also increasing. The annual consumption of refractory materials has reached 9 million tons, and the used refractory materials are about 4 million tons. Most of these used refractories (including magnesia-carbon bricks) are discarded as garbage, that is, waste refractories (including waste magnesia-carbon bricks), and a small amount of them are used for primary use, with low added value, which wastes resources and pollutes the environment. environment. [0003] The tundish is the last metallurgical vessel in the steelmaking process. At pres...

AI Technical Summary

Problems solved by technology

However, there are the following disadvantages: phenolic resin is expensive and costly, and pungent gases such as ammonia, formaldehyde, and free phenol are produced during the baking process, which endangers the health of workers

The above dry materials are almost all developed with natural or synthetic raw materials, and the introduction of CaO-containing materials such as magnesia-calcium sand and quicklime also has the problem of CaO hydration, which brings unpredictable hazards to the storage, transportation and use of materials.