Blocking cleaning process for COREX smelting reduction furnace dust-removal system

Abstract

The invention discloses a blocking cleaning process for a COREX smelting reduction furnace dust-removal system, which comprises blocking cleaning of a dust recycling system and heat whirlwind blocking cleaning. The blocking cleaning of the dust recycling system comprises the following steps of clearing a collection tank, clearing a TP chamber, and clearing a fluid dust bin. The heat whirlwind blocking cleaning comprises the following steps of connecting a bent pipe on a fifth valve, opening the valve, observing the blanking situation of a dustbin on a ground floor; and opening a nitrogen valve of the TP chamber to introduce nitrogen according to the requirement. Or the heat whirlwind blocking cleaning comprises the following steps: poking an accumulated material from a bypass of the bent pipe by a steel bar; then removing a corrugated tube of a hydraulic ball valve on the upper part, and poking the accumulated material from the bottom to top by the steel bar; observing the situation of the accumulated material on heat whirlwind, and when the accumulated material is lower than the lower edge of a man hole, clearing the accumulated material on a grating in the heat whirlwind by operating personnel; and closing a heat whirlwind large man hole, removing the bent pipe, and blocking a blind plate on the bent pipe. By adopting the proposal, the process can better complete the blocking cleaning work of the whole dust-removal system, and meets the production requirement. The process has the advantages of reasonable process, good blocking cleaning effect and the like.

Description

technical field [0001] The invention relates to a COREX smelting reduction furnace overhaul process method, in particular to a COREX smelting reduction furnace dedusting system cleaning process method. Background technique [0002] Baosteel Co., Ltd. Medium and Heavy Plate Branch adopts the new COREX ironmaking process. COREX (COAL REDUCTION EXTREME), as the name suggests, can directly use non-coking coal to produce molten iron, breaking through the dependence of traditional blast furnace ironmaking on coke resources and maximizing the use of my country's abundant resources. The success and further development of non-coking coal, COREX technology is of great significance to the sustainable development of my country's iron and steel industry. [0003] COREX smelting reduction furnace has the advantages of energy saving, environmental protection, small footprint, etc., and is the development direction of the ironmaking industry in the future. [0004] COREX smelting reduction ...

AI Technical Summary

Problems solved by technology

[0008] 1. The fluid hot material accumulated in the hot cyclone has a high dust temperature (700-850°C)

[0009] 2. The amount of accumulated material in the hot cyclone is relatively large, and the accumulated material in a single hot cyclone can reach 100m 3

[0010] 3. The gas and nitrogen content in the working position is high, and the workers must wear air respirators

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