Method for preparing foaming ceramic material from blast furnace hot state molten slag

Abstract

The invention relates to a method for preparing a foaming ceramic material from blast furnace hot state molten slag. The method comprises the following steps of S1, preheating compounds; S2, jointly conveying the blast furnace hot state molten slag and the preheated compounds into a hardening and tempering homogenization device; performing uniform mixing and heat insulation to obtain hardening andtempering molten slag; S3, conveying the hardening and tempering molten slag into a plate spinning palletization device; controlling the parameter of the plate spinning palletization process; introducing a preheated foaming agent so that the foaming agent sufficiently coats the hardening and tempering molten slag and are uniformly mixed with the hardening and tempering molten slag; obtaining thefoaming ceramic auxiliary ingredients; S4, conveying the foaming ceramic auxiliary ingredients into a foaming device; performing foaming and annealing to obtain the foaming ceramic materials. The method for preparing the foaming ceramic material has the advantages that the sensible heat of the blast furnace hot state molten slag can be directly used; the energy consumption of the foaming ceramic material preparation can also be reduced; the organic unification of the energy saving and consumption reduction in the foaming ceramic preparation process and the sensible heat reutilization of the blast furnace hot state molten slag can be realized; the comprehensive energy consumption is low.

Description

technical field [0001] The invention belongs to the fields of preparation of inorganic non-metallic materials and comprehensive utilization of metallurgical resources and energy, and in particular relates to a method for preparing foamed ceramic materials by using blast furnace hot slag. Background technique [0002] The temperature of the molten slag directly discharged from the blast furnace (that is, the blast furnace hot slag) is generally 1450-1550 °C, and 1 ton of the blast furnace hot slag contains about (126-188)×10 4 The sensible heat of kJ is equivalent to the energy of 60kg standard coal, which is a high-quality waste heat resource and has a high recovery value. However, due to technical reasons, most of this part of heat has not been recycled. Blast furnace slag is the main component of waste slag in iron and steel plants. The comprehensive utilization of blast furnace slag should not only consider the reuse of slag, but also consider the recovery of waste heat r...

AI Technical Summary

Problems solved by technology

However, in the traditional production process, it takes a lot of energy to preheat the main raw materials; spray granulation is to homogenize the product and evaporate 30% of the water in the product, which consumes a lot of energy; tunnel kiln sintering is to The product is sintered in an open cordierite sagger, and the heat consumed by kiln furniture such as sagger and the heat lost by flue gas account for more than 70% of the total fuel heat energy, resulting in a high cost of the sintering section

Therefore, the traditional methods for preparing foamed ceramic materials all have the problems of high heat energy consumption and high cost, which is not conducive to the further development of the foamed ceramic industry.

Images