CN216694480U

CN216694480U - Quick adjustable blanking mouth of hot stove feeding in ore deposit

Info

Publication number: CN216694480U
Application number: CN202122229597.5U
Authority: CN
Inventors: 董洪维; 伞晓军; 王骧威
Original assignee: Tonghua Jianxin Technology Co ltd
Current assignee: Tonghua Jianxin Technology Co ltd
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2022-06-07
Anticipated expiration: 2031-09-15

Abstract

The utility model belongs to the technical field of ferroalloy smelting, and particularly relates to a rapid adjustable blanking port for feeding of a submerged arc furnace. The device is suitable for the end part of the submerged arc furnace where the blanking pipe enters, and can be used for ferronickel smelting. An inner sleeve and an outer sleeve are connected at a position of a submerged arc furnace blanking pipe which is 1m high above a furnace cover of the submerged arc furnace, and the inner sleeve and the outer sleeve are connected in a sliding manner; the upper part of the inner sleeve is provided with an upper convex bracket, the upper part of the outer sleeve is provided with a lower convex bracket, and more than two connecting screw rods and nuts are arranged between the upper convex bracket and the lower convex bracket. The blanking port adopts an adjustable telescopic structure, can quickly adjust the furnace entering depth, improves the working environment, saves time and improves the efficiency by a single person. The blanking port can adjust the furnace entering depth according to the requirements of smelting operation, adjust the material distribution thickness and range and reduce the material waste.

Description

Quick adjustable blanking mouth of hot stove feeding in ore deposit

Technical Field

The utility model belongs to the technical field of ferroalloy smelting, and particularly relates to a rapid adjustable blanking port for feeding of a submerged arc furnace. The device is suitable for the end part of the submerged arc furnace where the blanking pipe enters, and can be used for ferronickel smelting.

Background

In the prior art, a feeding system is an important component of a closed nickel-iron ore heating furnace, is a device for intermittently or continuously supplying furnace charges into the ore heating furnace, and consists of a bin, a gate valve, a material pipe, a blanking port and the like. According to different sizes of the furnace, 10-38 material pipes are generally arranged in the furnace and are divided into a central material pipe, an alternate material pipe and a peripheral material pipe, and the end parts of the material pipes are provided with blanking ports.

When the ferronickel ore smelting furnace is used for smelting, when the temperature of the furnace charge entering the furnace by adopting the hot calcine reaches 750-850 ℃, the temperature of the hearth of the ore smelting furnace can be greatly changed due to the difference of the temperature of the furnace entering raw materials, the difference of the oxygen content of smoke in the hearth and the fluctuation of the furnace condition during the operation of the ore smelting furnace. Considering the extreme conditions of slag turnover and the like, the hearth material surface temperature is in the range of 500-1100 ℃. The material pipe and the blanking port are required to be heat-resistant. The common blanking pipe is directly inserted into the submerged arc furnace smoke hood from a furnace top bin through a gate valve. The furnace burden evenly distributes along around the electrode very important in the hot stove of ore deposit is smelted, solves the cloth problem by the unloading pipe of installing around the electrode, because the work of unloading pipe tip is in the hot stove bell of ore deposit high-temperature region below, and receives about the high-temperature furnace gas, when the furnace conditions changes and furnace temperature changes, the unloading pipe tip can be ablated gradually because of the traditional body of high temperature effect and lost life is shorter, and traditional mode can't in time be changed, must the stove that stops. Because the length of the blanking port is fixed, the charging depth can not be adjusted according to the requirements of smelting operation, and the material distribution thickness and range can not be adjusted, thereby influencing smelting.

In the past, the distance between the blanking point and the charge level is directly cut by the length of the material pipe or the position of an inserting plate hole, the material waste is caused by the length of the cut material pipe, and the position of the inserting plate hole is adjusted because the furnace cover of the submerged arc furnace is high in environmental temperature, large in radiant heat, narrow in space, heavy in weight and time and labor consuming at each time.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a quickly adjustable blanking port for submerged arc furnace feeding, which is adjustable in length, heat-resistant and good in using effect.

The technical solution of the utility model is as follows: the quick adjustable blanking mouth of hot stove feeding in ore deposit, its characterized in that is located hot stove bell upper portion 1m high position in ore deposit at hot stove unloading pipe in ore deposit and connects interior sleeve pipe, outer tube, and interior sleeve pipe, outer tube adopt sliding connection, and interior sleeve pipe upper portion has last evagination support, and outer tube upper portion has evagination support down, has more than two connection lead screw, screw between going up evagination support and the evagination support down.

In the above scheme, the method further comprises:

three connecting screw rods and nuts are arranged between the upper convex bracket and the lower convex bracket at intervals along the circumference.

The outer surface shell at the lower end of the outer sleeve is paved with a refractory material layer.

The outer surface shell at the lower end of the outer sleeve is beneficial to fixing the interval annular bosses of the refractory material layer.

The section of the position between the inner sleeve and the outer sleeve, which is close to the hearth, is lined with aluminum silicate rock wool felt with the refractoriness of 1260 ℃.

Asbestos ropes are lined between the inner sleeve and the outer sleeve and near the upper part of the furnace cover.

The utility model has the advantages that: 1. the blanking port adopts an adjustable telescopic structure, can quickly adjust the furnace-entering depth, improves the working environment, saves time and improves the efficiency by a single person. 2. The blanking port can adjust the furnace entering depth according to the requirements of smelting operation, adjust the material distribution thickness and range and reduce the material waste. 3. The blanking port adopts different heat-resistant materials at different positions of the equipment, and replaces a large amount of stainless steel, so that the equipment cost is greatly reduced. 4. Thereby select different blanking mouth materials according to different furnace conditions and reduce manufacturing cost. 5. Because the refractory material is paved on the outer surface shell of the front section of the blanking port, the refractory material can be removed when the slag is turned over abnormally under the furnace condition, and the equipment body is effectively protected.

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a schematic view of the structure in the direction a of fig. 1.

Detailed Description

Referring to fig. 1 and 2, the names of the components are as follows: the furnace cover comprises an inner sleeve 1, an outer sleeve 2, an upper convex support 3, a lower convex support 4, a screw rod 5, a nut 6, a refractory material layer 7, an annular boss 8, an aluminum silicate rock wool felt 9, an asbestos rope 10, a lower plane 11 of the furnace cover of the electric furnace and a flange plate 12.

Referring to fig. 1 and 2, the feeding quick adjustable blanking port of the submerged arc furnace is a two-body sliding structure of an inner sleeve 1 and an outer sleeve 2, wherein the blanking pipe of the submerged arc furnace is located at a height position of about 1m on the upper part of a furnace cover of the submerged arc furnace, an upper convex support 3 is arranged on the upper part of the inner sleeve 1, a lower convex support 4 (or called connecting plate) is arranged on the upper part of the outer sleeve 2, and three connecting screw rods 5 (bolts) and screws 6 (nuts) are arranged between the upper convex support 3 and the lower convex support 4 at intervals along the circumference. Alpha is 120 degrees. The screw 6 is screwed to drive the screw rod 5 to move upwards, so that the outer sleeve 2 is driven to move upwards along the inner sleeve 1, and otherwise, the outer sleeve 2 can move downwards along the inner sleeve 1. This device changes the fixed defect in traditional unloading pipe unloading position. Because the end part of the blanking port works in a high-temperature area below the furnace cover of the submerged arc furnace and is subjected to high-temperature furnace gas, when the furnace condition changes and the temperature of a hearth changes, the end part of the blanking port gradually ablates and loses due to high temperature, and the utility model adopts the feeding quick adjustable blanking port to solve the technical problem. The design nut form connecting plate, the connecting plate can rationally select the length that the feed pipe tip blanking mouth stretches into in the bell through driven lead screw 5, can effectively solve the defect of ordinary feed pipe pan feeding rigidity in the past, and this blanking mouth can be adjusted into the stove degree of depth according to the needs of smelting operation, in time adjusts cloth thickness and scope in order to ensure that the furnace condition is smooth and easy. The adjustment by the screw rod 5 is short in time and high in speed, and can be completed by one operator, so that the working efficiency is greatly improved. The flange 12 is connected with a blanking pipe.

The outer surface shell at the lower end of the outer sleeve 2 is paved with a refractory material layer 7 with a certain thickness. The method is characterized in that a refractory material layer 7 with a certain thickness is paved on the outer surface shell of the front section of the blanking port, and the refractory material contains SiO₂、CaO、Al₂O₃The raw materials are adjusted by utilizing the advantages of high thermal stability and high refractoriness, so that the blanking port body can be effectively protected, the radiant heat is reduced to the maximum extent, the service life of the blanking port body is prolonged and adjusted, the maintenance is reduced, and the production cost is reduced.

The outer surface shell at the lower end of the outer sleeve 2 is beneficial to fixing the interval annular bosses 8 of the refractory material layer.

The section between the inner sleeve 1 and the outer sleeve 2, which is close to the hearth, is lined with an aluminum silicate rock wool felt 9 with the refractoriness reaching 1260 ℃. The aluminum silicate rock wool felt 9 with the refractoriness reaching 1260 ℃ is adopted at the position between the inner sleeve 1 and the outer sleeve 2, which is close to the hearth, so that the material of the inner sleeve 1 can be effectively protected, and the upward movement of smoke gas can be prevented.

An asbestos rope 10 is lined between the inner sleeve 1 and the outer sleeve 2 and is close to the upper section of the furnace cover. The asbestos rope 10 is adopted between the inner sleeve 1 and the outer sleeve 2 and is close to the upper part of the furnace cover, so that the problem of smoke leakage can be thoroughly solved, the safety of the working environment is effectively guaranteed, and the operation condition is improved.

The device is suitable for the end part of the submerged arc furnace, the charging and discharging are carried out on the charge level of the hearth, the device can be used for ferronickel smelting, and the material of the adjusting part can also be widely applied to smelting of other ferroalloys.

The foregoing description is only exemplary of the utility model and is not intended to limit the spirit of the utility model.

Claims

1. The feeding quick adjustable blanking port of the submerged arc furnace is characterized in that an inner sleeve (1) and an outer sleeve (2) are connected to a blanking pipe of the submerged arc furnace at a position 1m high above a furnace cover of the submerged arc furnace, and the inner sleeve (1) and the outer sleeve (2) are connected in a sliding manner; an upper convex support (3) is arranged at the upper part of the inner sleeve (1), a lower convex support (4) is arranged at the upper part of the outer sleeve (2), and more than two connecting screw rods (5) and nuts (6) are arranged between the upper convex support (3) and the lower convex support (4).

2. A rapid adjustable blanking opening for submerged arc furnace feeding according to claim 1 characterized in that three connecting screw rods (5) and nuts (6) are arranged between the upper convex bracket (3) and the lower convex bracket (4) at intervals along the circumference.

3. A rapid adjustable blanking opening for submerged arc furnace charging according to claim 1 or 2, characterized in that the outer casing at the lower end of the outer casing (2) is provided with a layer (7) of refractory material.

4. A rapid adjustable blanking opening for submerged arc furnace charging according to claim 3, characterized in that the outer casing at the lower end of the outer casing (2) is provided with spaced annular bosses (8) for facilitating the fixing of the layer of refractory material.

5. A rapid adjustable blanking opening for submerged arc furnace charging according to claim 4 characterized in that the section near the hearth between the inner casing (1) and the outer casing (2) is lined with aluminium silicate rock wool felt (9) with a refractoriness of up to 1260 ℃.

6. A rapid adjustable blanking opening for submerged arc furnace charging according to claim 5, characterized in that asbestos cords (10) are lined between the inner casing (1) and the outer casing (2) near the upper part of the furnace cover.