阅读说明：本技术 一种新型混气室挡墙砌筑方式 (Novel gas mixing chamber retaining wall masonry method ) 是由 覃德波 于 2020-06-18 设计创作，主要内容包括：本发明公开一种新型混气室挡墙砌筑方式,清理混气室挡墙中间处与炉墙之间的杂物,并且将混气室挡墙与炉墙相对表面清理干净,测量混气室挡墙与炉墙长度,根据混气室挡墙与炉墙的长度,每间隔5～10米设有一个挡墙,挡墙设置为拱形,挡墙下拱坡拱度为Y,Y＝2(1-4X*2/L2),X为横坐标,L为跨径,使用鼓风机,测试挡墙下拱的通风量,合格后,静置等待混凝土干燥硬化。本发明有效防止了竖炉混气室挡墙的变形和倒塌,有利于稳定竖炉炉况,达到减少竖炉挡墙变形和避免倒塌造成竖炉减产的目的,有效的在混气室挡墙在不改变耐材材质及控制成本的前提下,提高混气室挡墙的整体稳定性,降低高温、高压、受热造成的变形和掉落情况,有效延长混气室挡墙的使用寿命。(The invention discloses a novel gas mixing chamber retaining wall building method, which is characterized in that sundries between the middle of a retaining wall of a gas mixing chamber and a furnace wall are cleaned, the opposite surfaces of the retaining wall of the gas mixing chamber and the furnace wall are cleaned, the lengths of the retaining wall of the gas mixing chamber and the furnace wall are measured, a retaining wall is arranged at intervals of 5-10 meters according to the lengths of the retaining wall of the gas mixing chamber and the furnace wall, the retaining wall is arranged to be arched, the arch camber of the lower arch of the retaining wall is Y, Y is 2(1-4X 2/L2), X is a horizontal coordinate, L is a span diameter, an air blower is used for testing the ventilation volume of the lower arch of the retaining wall, and after the ventilation volume is qualified, the retaining. The invention effectively prevents the deformation and the collapse of the retaining wall of the vertical furnace gas mixing chamber, is beneficial to stabilizing the furnace condition of the vertical furnace, achieves the purposes of reducing the deformation of the retaining wall of the vertical furnace and avoiding the reduction of the production of the vertical furnace caused by the collapse, effectively improves the overall stability of the retaining wall of the gas mixing chamber on the premise of not changing the refractory material and controlling the cost of the retaining wall of the gas mixing chamber, reduces the deformation and the falling caused by high temperature, high pressure and heating, and effectively prolongs the service life of the retaining wall of the gas mixing chamber.)

1. A novel gas mixing chamber retaining wall masonry method is characterized by comprising the following steps:

the method comprises the following steps: cleaning sundries between the middle of the retaining wall of the gas mixing chamber and the furnace wall, and cleaning the opposite surfaces of the retaining wall of the gas mixing chamber and the furnace wall;

step two: measuring the lengths of the retaining wall and the furnace wall of the gas mixing chamber, and arranging a retaining wall at intervals of 5-10 meters according to the lengths of the retaining wall and the furnace wall of the gas mixing chamber;

step three: the retaining wall is set to be arched, the arch degree of the lower arch slope of the retaining wall is Y, Y is 2(1-4X 2/L2), X is a horizontal coordinate, and L is a span.

Step four: and testing the ventilation quantity of the lower arch of the retaining wall by using an air blower, and standing for waiting for the concrete to be dried and hardened after the ventilation quantity is qualified.

2. The novel gas mixing chamber retaining wall masonry method according to claim 1, wherein the concrete used in the third step is high temperature resistant concrete.

3. The method for laying a novel gas-mixing chamber retaining wall according to claim 1, wherein in the second step, the retaining wall is built by using T3 bricks and concrete.

Technical Field

The invention relates to the technical field of pellet shaft furnaces, in particular to a novel gas mixing chamber retaining wall masonry method.

Background

In the shaft furnace pelletizing process, a hardening furnace is a vertical furnace, raw pellets are loaded from a furnace mouth at the upper part of the shaft furnace, under the action of self gravity, the raw pellets pass through heating belts and cooling belts to reach a discharge end, combustion chambers are arranged at two sides of the middle part of a furnace body, high-temperature gas is generated and is sprayed into a protection chamber, the pellets are dried and preheated and roasted, a part of hot air after primary cooling pellet ores in the furnace rises through an air guide wall and a drying bed to dry the raw pellets, the working temperature of a gas mixing chamber retaining wall of the shaft furnace is 1000-1200 ℃, the working pressure is 14-20 KPa, the gas mixing chamber retaining wall is required to bear the friction of furnace materials and the scouring of air flow besides high temperature and high pressure, therefore, the working conditions are required to be considered in aspects of gas mixing chamber retaining wall material selection, wall structure design and the like, in addition, the gas tightness of the furnace body is the basic original measurement of brickwork design, the service life, the gas mixing chamber retaining wall is a relatively critical link, the integrity of the whole structure of the retaining wall directly influences the roasting yield of the shaft furnace and the quality of pellet ore, in the actual production process, various factors influence the service cycle of the gas mixing chamber retaining wall, one of the important factors is that the gas mixing chamber retaining wall has large span, no support is arranged in the middle, long-term high temperature and high pressure, and regular maintenance in every month, temperature change easily causes deformation, bending and other phenomena, the deformation of the gas mixing chamber retaining wall directly influences the furnace condition of the shaft furnace, and causes uneven airflow distribution in the furnace, the blanking of the shaft furnace is uneven, the performance of productivity and the quality of finished pellet ore are influenced, and a novel gas mixing chamber retaining wall building mode is provided aiming at the situation.

Disclosure of Invention

The invention aims to provide a novel building method of a retaining wall of a gas mixing chamber, which effectively prevents the retaining wall of the gas mixing chamber of a shaft furnace from deforming and collapsing, ensures the uniform distribution and drying effect of two sides of a drying bed of the shaft furnace, is favorable for stabilizing the furnace condition of the shaft furnace, achieves the aims of reducing the deformation of the retaining wall of the shaft furnace and avoiding the yield reduction of the shaft furnace caused by collapsing, improves the productivity and quality of pellet ore, effectively improves the overall stability of the retaining wall of the gas mixing chamber on the premise of not changing refractory materials and control cost of the retaining wall of the gas mixing chamber, reduces the deformation and dropping caused by high temperature, high pressure and heating, and effectively prolongs the service life of the retaining wall of the.

The purpose of the invention can be realized by the following technical scheme:

a novel gas mixing chamber retaining wall masonry method comprises the following steps:

the method comprises the following steps: cleaning sundries between the middle of the retaining wall of the gas mixing chamber and the furnace wall, and cleaning the opposite surfaces of the retaining wall of the gas mixing chamber and the furnace wall;

step two: measuring the lengths of the retaining wall and the furnace wall of the gas mixing chamber, and arranging a retaining wall at intervals of 5-10 meters according to the lengths of the retaining wall and the furnace wall of the gas mixing chamber;

step three: the retaining wall is set to be arched, the arch degree of the lower arch slope of the retaining wall is Y, Y is 2(1-4X 2/L2), X is a horizontal coordinate, and L is a span.

Step four: and testing the ventilation quantity of the lower arch of the retaining wall by using an air blower, and standing for waiting for the concrete to be dried and hardened after the ventilation quantity is qualified.

Further, the concrete used in the third step is high temperature resistant concrete.

Further, in the second step, the retaining wall is built with concrete by using T3 bricks.

The invention has the beneficial effects that:

1. the invention effectively prevents the deformation and collapse of the retaining wall of the gas mixing chamber of the shaft furnace, ensures the uniform material distribution and drying effect on two sides of the drying bed of the shaft furnace and is beneficial to stabilizing the furnace condition of the shaft furnace;

2. the invention achieves the purposes of reducing the deformation of the retaining wall of the shaft furnace and avoiding the yield reduction of the shaft furnace caused by collapse, and improves the productivity and quality of pellet ore;

3. the invention effectively improves the integral stability of the gas mixing chamber retaining wall on the premise of not changing refractory materials and controlling cost, reduces the deformation and falling caused by high temperature, high pressure and heating, and effectively prolongs the service life of the gas mixing chamber retaining wall.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

A novel gas mixing chamber retaining wall masonry method comprises the following steps:

the method comprises the following steps: cleaning sundries between the middle of the retaining wall of the gas mixing chamber and the furnace wall, and cleaning the opposite surfaces of the retaining wall of the gas mixing chamber and the furnace wall;

step two: measuring the lengths of the retaining wall and the furnace wall of the gas mixing chamber, and arranging a retaining wall at intervals of 5-10 meters according to the lengths of the retaining wall and the furnace wall of the gas mixing chamber;

step three: the retaining wall is set to be arched, the arch degree of the lower arch slope of the retaining wall is Y, Y is 2(1-4X 2/L2), X is a horizontal coordinate, L is a span, and the retaining wall is built by using T3 bricks and concrete.

Step four: and testing the ventilation quantity of the lower arch of the retaining wall by using an air blower, and standing for waiting for the concrete to be dried and hardened after the ventilation quantity is qualified.

The concrete is high temperature resistant concrete.