Ball type hot blast stove dismantling method

Abstract

The invention discloses a ball type hot blast stove dismantling method, which is a destructive dismantling method and comprises the steps that a furnace shell steel structure of a hot blast stove, a hot blast stove body lining material and steel platform accessory equipment are all destructively dismantled. The method comprises the following steps that S1, early-stage dismantling work is conducted; S2, a combustor is dismantled; S3, a hot air header pipe platform is dismantled; S4, a large vault is dismantled; S5, an upper-layer ball loading platform is dismantled; S6, a heat storage chamber is dismantled; S7, a lower-layer ball loading platform is dismantled; S8, a lower cone, a grate and a cold air chamber are dismantled; and S9, waste is cleared away. The dismantling method is high in efficiency, low in cost, high in safety and convenient to use and popularize.

Description

technical field [0001] The invention relates to a method for dismantling an industrial furnace, in particular to a method for dismantling a spherical hot blast stove. Background technique [0002] As a supporting facility for blast furnaces, hot blast stoves generally have 3 to 4 hot blast stoves with one blast furnace, so the hot blast stoves are concentrated near the blast furnace, and the distance between each hot blast stove is relatively small. In the actual construction and dismantling of the hot blast stove, the top height of the burner on the upper part of the hot blast stove is 30-50m, and only the crane arm with a large tonnage (300T, 400T, etc.) is long enough to hook the burner, and according to the production process of the hot blast stove, There are three layers of continuous steel platforms on the hot blast stove. From top to bottom is the hot blast main pipe platform and two layers of ball loading platforms. Each layer of the hot blast stove has various pipes...

AI Technical Summary

Problems solved by technology

In the actual construction and dismantling of the hot blast stove, the top height of the burner on the upper part of the hot blast stove is 30-50m, and only the crane arm with a large tonnage (300T, 400T, etc.) is long enough to hook the burner, and according to the production process of the hot blast stove, There are three layers of continuous steel platforms on the hot blast stove. From top to bottom is the hot blast main pipe platform and two layers of ball loading platforms. Each layer of the hot blast stove has various pipes and valves, which are criss-crossed vertically and horizontally. Due to the influence of force, it cannot meet the conditions required for the demolition of large excavators, and the internal diameter of the burner on the top of the hot blast stove is small, and it cannot accommodate small excavators to work inside

At the same time, due to the influence of various pipelines and gate valves and other equipment and facilities, when dismantling the large vault, regenerator, and lower vertebral body, it is generally used to enter the furnace manually, and stand on the lining material to pry off one by one or use small-scale excavation. The outside of the machine furnace is dismantled, and the area on the ball loading platform that meets the working range of the small excavator is limited to the side of the blast furnace. The inner lining loses the support of the furnace shell. Under the strong vibration of the excavator gun head, the inner lining may collapse in a large area or hit the platform in an instant, and when the furnace shell is removed, the inner lining may stick to the furnace shell When hoisting away, there is a phenomenon that the inner lining falls off the furnace shell and falls to the ground or the platform or hits the construction personnel, so the safety is low and the dismantling speed is slow. At the same time, in order not to affect the excavator's work on the platform, it is necessary to frequently clean the dismantled hot air Furnace lining material, resulting in very low removal efficiency and high cost of hot blast stove

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