RU2001956C1 - Method and device for lining metallurgical units - Google Patents

Description

the matura is made hollow of metal, ceramic or cermet materials.

The proposed method is carried out in such a sequence.

Initially, the surface to be protected is prepared for lining by conventional techniques (e.g. sandblasting), which removes scale, rust and other substances that impede the formation of a durable lining layer. The formwork is installed on the prepared surface, the main reinforcement is rigidly fixed, and the additional one is evenly distributed in the self-hardening mixture by mixing with it before laying in the gap between the protected surface and the formwork. After the lining layer has hardened, it is subjected to the necessary heat treatment. It is characteristic of the device according to the invention that the main and additional fittings are made hollow of metallic, ceramic or cermet materials.

Under the conditions of the Dnepropetrovsk metallurgical equipment plant Dneprot zhmash, the proposed method and device were tested while lining the valve to blow Du-1300 hot.

The drawing shows a device that implements the proposed method.

Claims (3)

1. A method of lining metallurgical units, including preparing a surface to be protected, attaching reinforcement to it, installing formwork, preparing a refractory mixture, laying it between the surface to be protected and formwork, maintaining the refractory mixture until it is fully mature, removing the formwork, characterized in that what. in order to increase the lining resistance, the refractory mixture is mixed with additional reinforcement before laying. The protected surface (1) of the valve was sandblasted. On it, in a checkerboard pattern, the main reinforcement (2) was fixed by welding in the form of V-shaped pieces of a chopped steel pipe of 0 25 mm and a wall thickness of 2 mm. A collar 60 mm high specially welded along the edges of the surface to be protected was used as an opal / bar. In the prepared self-hardening concrete (3) of the VGB brand, 10% of additional reinforcement (4) was added in the form of even chopped pieces of the same pipe with a length of 50 mm, it was moved, the mixture was distributed along the protected surface flush with the shoulder and compacted on a vibration stand. Maintenance of the refractory mixture consisted of applying a finely dispersed layer of water until the concrete set completely after every hour for 10 hours. After that, the lined surface was cleaned of excess concrete and tested on the path of a hot blast furnace. Testing showed that the proposed technical solution allows to increase the durability of the lining of hot valves blow 1.5 times in comparison with the commercially available valve DU-1300, lined by the method and device adopted for the prototype. (56) Refractories. Technologists for the construction and repair of furnaces. Translation from Ponish A.A. Tikhonov. Ed. A.P. Panarmna. M .: Metallurgists, 1980, p. 121. 2. A device for lining metallurgical units, including a refractory packing layer with reinforcement located in it, attached to the protected surface, characterized in that the refractory packing layer contains additional reinforcement uniformly located therein, not connected with the surface to be protected, the reinforcement being hollow. 3. The device according to claim 2, characterized in that the floor reinforcement is made of metal, ceramic or metalke "tft mical.