Method for maintaining furnace lining composite fireproof material of submerged arc furnace

A technology for refractory materials and submerged arc furnaces, which is used in lining repair, furnace and furnace components, etc., can solve the problems of loose and dislocated heat insulation bricks of gas collector linings, scrapped furnace bodies, hidden safety hazards, etc., to avoid shrinkage cracking and falling off. The effect of collapse, saving construction cost and stabilizing production efficiency

CN108061465AInactive Publication Date: 2018-05-22JIANGSU ZHONGLEI ENERGY SAVING TECH DEV CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-05-22
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a method for maintaining a furnace lining composite fireproof material of a submerged arc furnace. The method includes the following steps: sealing and pressing a furnace: closing connection channel openings between a furnace top riser pipe of a coke furnace at a maintenance side and axle tubes and / or near-end gate plates of a gas collection pipe at the maintenance side; forming holes in a pipe wall: at least forming a construction hole and a convection hole in the gas collection pipe at the maintenance side; dissipating heat and exchanging air: dissipating and discharging high temperature gas in the gas collection pipe; sealing a gate: sealing side surfaces of the near-end gate plates of the gas collection pipe; detaching a thermal insulation layer; sealing axle tube openings; building a thermal insulation layer; performing once hole sealing; demounting a seal; demounting seals of the side surfaces of the near-end gate plates of the gas collection pipe and a seal of a connection channel opening between each axle tube and the gas collection pipe; performing twice hole sealing; opening all the gate plates; opening the gate plates of the riser pipe in order; repairing a steel housing; and cleaning a site. The maintaining method can achieve maintain the submerged arc furnace in a constant heat production, is low in maintenance cost, and is short in construction period.
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Description

technical field

[0001] The invention belongs to the technical field of submerged arc furnace lining maintenance, and in particular relates to a hot-state maintenance method for the inner lining heat insulation layer of a submerged arc furnace. Background technique

[0002] Submerged Arc Furnace is a high energy consumption industrial electric furnace with wide application, various styles and continuous operation. During the production of submerged arc furnace, a large amount of high-temperature polluted flue gas will be produced. The heat energy taken away by the flue gas is equivalent to 40%-50% of the total heat energy input into the submerged arc furnace. The temperature of the waste heat of the flue gas is relatively high, which belongs to high-grade waste heat. Direct discharge of high-temperature flue gas will not only cause environmental pollution, but also waste a lot of heat energy resources.

[0003] The structure of the existing submerged arc furnace heat collect...

Examples

Embodiment Construction

[0035] The maintenance method of the present invention will be described in detail below. The replacement and maintenance method of the present invention comprises the following construction steps:

[0036] Blocking the pressure furnace: In order to realize the hot maintenance of the coke oven without stopping the furnace, the maintenance of the coke-side gas collecting pipe and the machine-side gas collecting pipe is carried out alternately. When repairing the air collecting pipe on the focal side, the air collecting pipe on the focal side is the air collecting pipe on the maintenance side, otherwise, the air collecting pipe on the machine side is the air collecting pipe on the maintenance side. The other side corresponding to the air collecting pipe on the maintenance side is the air collecting pipe on the working side. During maintenance, firstly block the openings of the connecting passages between the rising pipes and bridge pipes on the top of the coke oven on the maint...