Process method and system for continuous casting circulating cooling water and slab waste heat utilization

Abstract

A technological method for continuous casting circulating cooling water and casting billet waste heat utilization is characterized in that part of cooling water of a continuous casting plant is led into a casting billet waste heat roasting and heating device above a casting billet roller bed by a pipeline and heated into water vapor and hot water which are conveyed to necessary places separately. A system of the technological method comprises a cold water device part, a casting billet waste heat roasting and heating device part and a collection device part, wherein the cold water device part adopts the structure that the water inlet and the water outlet of a water pump set are connected with a cooling water treatment device of the continuous casting plant and a cold water pipeline respectively; the casting billet waste heat roasting and heating device part adopts the structure that heat exchangers are arranged above a casting billet and connected with the cold water pipeline and a hot water pipeline respectively; a gas-liquid separator is connected between the hot water pipeline and a water vapor pipeline; and the collection device part is that water vapor and hot water are input into a water vapor collection device and a heated water collection device respectively. The technological method and the system have the beneficial effects that circulating cooling water of the continuous casting plant and waste heat of the continuous casting billet are utilized, external pipelines are fewer, and energy conservation and emission reduction are facilitated.

Description

technical field [0001] The invention belongs to the field of metallurgical continuous casting production lines, in particular to the utilization of casting blank cooling water and casting blank radiation heat in the continuous casting production line. Background technique [0002] In the metallurgical continuous casting production line, except for part of the spray cooling water in the secondary cooling zone of continuous casting that is heated and evaporated, most of it flows into the iron pit through the oxide iron ditch, and after a series of cooling water treatment processes, the qualified water enters the continuous casting again. Cooling system for recycling. The cast slab formed after the mold in the continuous casting process passes through the billet roller table and is slowly cooled to a certain temperature by natural cooling, usually at a temperature of 850-1000°C, and the cast slab finally drops to room temperature at the stacking place. In the traditional conti...

AI Technical Summary

Problems solved by technology

In the traditional continuous casting technology, a large amount of heat energy in the above process in the continuous casting production line is naturally dissipated, so that a large amount of heat energy is wasted

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