CN212133275U

CN212133275U - Furnace bottom of walking beam furnace

Info

Publication number: CN212133275U
Application number: CN202020758361.3U
Authority: CN
Inventors: 谭碧波; 杜江; 邓明华; 冯波涌; 曹卫宁; 谢尧奎; 魏世昭; 袁林
Original assignee: Hunan Valin Xiangtan Iron and Steel Co Ltd
Current assignee: Hunan Valin Xiangtan Iron and Steel Co Ltd
Priority date: 2020-05-10
Filing date: 2020-05-10
Publication date: 2020-12-11
Anticipated expiration: 2030-05-10

Abstract

A furnace bottom of a stepping heating furnace is respectively provided with a high-alumina brick layer, a clay refractory brick layer, a clay heat-insulating refractory brick layer, a fiberboard layer, a fiber felt layer and a steel plate layer from inside to outside; the clayey heat-insulating refractory brick layer is divided into two layers: 1.0 layer of clay heat-insulating refractory brick and 0.6 layer of clay heat-insulating refractory brick. The utility model has the advantages that: the multilayer heat insulation has good heat insulation effect; the fiber board and the fiber felt are adopted close to the steel deck, so that high heat insulation is realized, and the reduction of the service life of the steel deck caused by the overheating of the brick deck is prevented; the furnace wall structure with the composite layer reduces heat loss and prolongs the service life of the furnace lining.

Description

Furnace bottom of walking beam furnace

Technical Field

The utility model belongs to the technical field of the heating furnace, concretely relates to walking beam furnace stove bottom.

Background

With the increasing requirements of the processing market on bar steel products, the development of the bar steel products tends to be more and more in the directions of zero defects on the surfaces of the products, high dimensional tolerance, high precision, diversified specifications, cost and reduced process steps. Therefore, how to improve the grade of bar products and gradually develop the bar products to the direction of high technology, high quality and high added value is a problem to be overcome at first.

The walking beam type heating furnace has the advantages of good high-temperature heating, flexible operation, higher intelligent degree and the like, the furnace length is not limited by the steel pushing ratio, and the walking beam type heating furnace is very suitable for the requirements of the modern rolling mill on the development towards large-scale, high-speed and modernization. In the prior art, the hardness and the heat preservation effect of the furnace bottom do not meet the requirement of high-speed development, and the later maintenance is difficult. Good steel needs a good furnace, and a good furnace bottom is a foundation, so that the necessary conditions that the production yield is improved and the high and medium quality is improved are provided for the heating furnace bottom which has good heat preservation effect, long service life, safety and reliability.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a furnace bottom of a walking beam furnace with good heat preservation effect, long service life, safety and reliability.

The technical scheme of the utility model:

a furnace bottom of a stepping heating furnace is respectively provided with a high-alumina brick layer, a clay refractory brick layer, a clay heat-insulating refractory brick layer, a fiberboard layer, a fiber felt layer and a steel plate layer from inside to outside. The clayey heat-insulating refractory brick layer is divided into two layers: clay heat insulation refractory brick layer.

The thickness of the high-alumina brick layer is 110-120 mm, the thickness of the clay refractory brick layer is 60-70 mm, the thickness of the clay heat-insulating refractory brick layer is 150-300 mm, and the thickness of the fiber board layer and the fiber felt layer is 55-75 mm;

the utility model has the advantages that: the multilayer heat insulation has good heat insulation effect; the fiber board and the fiber felt are adopted close to the steel deck, so that high heat insulation is realized, and the reduction of the service life of the steel deck caused by the overheating of the brick deck is prevented; the furnace wall structure with the composite layer reduces heat loss and prolongs the service life of the furnace lining.

Drawings

FIG. 1 is a schematic view of the structure of the hearth of a walking beam furnace.

In the figure: 1-high-aluminum brick layer, 2-clay refractory brick layer, 3-clay heat-insulating refractory brick layer, 4-fiberboard layer, 5-fiber felt layer and 6-steel plate layer. 31-clayey insulating firebricks 1.0 layer, and 32-clayey insulating firebricks 0.6 layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments.

As shown in the figure: a furnace bottom of a stepping heating furnace is respectively provided with a high-alumina brick layer (1), a clay refractory brick layer (2), a clay heat-insulating refractory brick layer (3), a fiberboard layer (4), a fiber felt layer (5) and a steel plate layer (6) from inside to outside; the clayey heat-insulating refractory brick layer is divided into two layers: 1.0 layer (31) of clay insulating firebrick and 0.6 layer (32) of clay insulating firebrick, 0.6 and 1 represent the volume density of clay brick, the smaller the numerical value, the lighter the brick is, the better the heat insulation effect is, but the refractoriness is relatively reduced, therefore, two layers are arranged to increase the heat insulation effect and the fire resistance strength.

The thickness of the high-alumina brick layer (1) is 114 mm, the thickness of the clay refractory brick layer (2) is 68 mm, the thickness of the clay heat-insulating refractory brick layer (1.0) is 136 mm, the thickness of the clay heat-insulating refractory brick layer (0.6) is 136 mm, the thickness of the fiberboard layer (4) and the fiber felt layer (5) is 60 mm, and the total thickness is 514 mm. The high-alumina brick layer is a high-alumina brick: the performance indexes of the brand LZ-55 (first heating and preheating section) and the brand LZ-65 (second heating and soaking section) conform to the specification of GB/T2998 and 2012. Clay heat insulation refractory brick layer: the trade marks are NG-0.6, NG-0.8 and NG-1.0, and the performance indexes conform to the regulations of GB 3994-1983.

Claims

1. The utility model provides a walking beam furnace stove bottom which characterized in that: a high-alumina brick layer, a clay refractory brick layer, a clay heat-insulating refractory brick layer, a fiberboard layer, a fiber felt layer and a steel plate layer are respectively arranged from inside to outside; the clayey heat-insulating refractory brick layer is divided into two layers: 1.0 layer of clay heat-insulating refractory brick and 0.6 layer of clay heat-insulating refractory brick; the thickness of the high-alumina brick layer is 110-120 mm, the thickness of the clay refractory brick layer is 60-70 mm, the thickness of the clay heat-insulating refractory brick layer is 150-300 mm, and the thickness of the fiberboard layer and the fiber felt layer is 55-75 mm.