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A blast furnace floor protection system

A protection system and blast furnace technology, applied in blast furnaces, blast furnace details, blast furnace parts, etc., can solve problems such as potential safety hazards and economic losses, and achieve the effects of convenient operation, good pressure effect, and simple installation

Active Publication Date: 2017-04-26
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problems in the prior art that the blast furnace bottom sealing plate is upturned and causes major safety hazards and major economic losses, the present invention provides a blast furnace bottom plate protection system

Method used

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  • A blast furnace floor protection system
  • A blast furnace floor protection system
  • A blast furnace floor protection system

Examples

Experimental program
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Effect test

Embodiment 1

[0051] A blast furnace floor protection system in this embodiment includes a pressurizing device, a temperature sensor 11, a pressure sensing device 3 and a castable 6, wherein: the pressurizing device can be a pneumatic or hydraulic device, directly or through a pressure sensing device 3 acting on the upturned periphery of the upturned furnace bottom sealing plate 5; figure 2 As shown, the temperature sensor 11 is set in the gap between the furnace bottom H beam 9 and the upturned furnace bottom sealing plate 5; the castable 6 is filled between the furnace bottom H beam 9 and the upturned furnace bottom sealing plate 5 in the gap between. In this embodiment, the pressurizing device is an anchor bolt pressurizing device 2, including an embedded anchor bolt 21, a pressing plate A22, a nut A23 and a spacer 24; the bottom end of the embedded anchor bolt 21 is inserted on the outside of the blast furnace shell 10, In the foundation borehole 34 reserved for the blast furnace foun...

Embodiment 2

[0081] The basic structure of a blast furnace bottom protection system of the present embodiment is the same as that of the first embodiment. The improvement lies in that: before pouring the high thermal conductivity self-flowing castable, the pressing devices 4 are evenly distributed on the circumference of the bottom surface of the blast furnace, such as Figure 5 As shown, the cross section of the main body of the pressing device 4 is in the shape of a left and right asymmetric "earth" shape, including a pressing plate B43 and a base plate 44 that are parallel to each other, and a bolt 41 that is fixedly connected to the base plate 44 after passing through the pressing plate B43; The nut B42 adjusts the height of the pressing plate B43; the base plate 44 is inserted into the bottom of the upturned furnace bottom sealing plate 5 and the furnace bottom H beam 9 is fixedly connected by welding, and is pressed by the pressing plate B43 on the upturned periphery of the upturned fu...

Embodiment 3

[0085] The basic structure of a blast furnace bottom protection system of this embodiment is the same as that of Embodiment 2, and a pressing device 4 can be used to replace the anchor bolt pressing device 2 directly acting on the bottom sealing plate 5 of the upturned furnace; Adjusted again: SiC, 85 parts; aqueous binder, 20 parts; corundum, 19 parts; water reducing agent and dispersant, 1 part in total. Through testing, its thermal conductivity {100℃, (200℃×24h)} is 12w / m.k, and its strength grade is C40. After testing, the indicators also meet the requirements.

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Abstract

The invention discloses a hearth plate protection system for a blast furnace, and belongs to the technical field of blast furnace equipment. The hearth plate protection system comprises pressurization devices, temperature sensors, pressure sensing devices and castable material. The pressurization devices act on the upward-warping periphery of an upward-warping hearth closing plate directly or through the pressure sensing devices. The temperature sensors are arranged in the gap between an H-shaped hearth beam and the upward-warping hearth closing plate, and the castable material fills the gap. According to the invention, the pressure change of the upward-warping periphery and the bottom temperature change of the hearth closing plate of the blast furnace can be detected online and continuously through the pressurization devices, the pressure sensing devices and the temperature sensors, real-time data of multiple measurement points are provided so that the pressure change and the temperature change of the hearth closing plate can be analyzed conveniently, and the hearth closing plate of the blast furnace can be prevented from warping upwards continuously. The bottom surface temperature data and the pressure data of the upward-warping hearth closing plate can be used for supporting safety production of smelting of the blast furnace and finding out the reason of upward-warping of the hearth closing plate.

Description

technical field [0001] The invention belongs to the technical field of blast furnace equipment, in particular to a blast furnace floor protection system. Background technique [0002] Global large-scale ironmaking blast furnaces, with changes in blast furnace smelting production, such as figure 1 As shown, some blast furnaces will have upturned furnace bottom sealing plates, and the upturned furnace bottom sealing plates will increase with the age of the blast furnace; serious deformation will cause damage to the hearth, and gas leakage will directly affect personal and equipment safety. At present, there is no definite determination of the cause of the upturning of the furnace bottom sealing plate at home and abroad. At the same time, the rising stress of the furnace bottom sealing plate varies with the process parameters such as blast furnace top pressure, air supply temperature, furnace top temperature, air temperature, material load and material structure. There is no q...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/00
Inventor 廖海欧田竣徐兆春丁晖李杰民王成伟李明亮黄足兵
Owner MAANSHAN IRON & STEEL CO LTD
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