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Liquid blast furnace slag pelletizing method and apparatus for heat recovering process

A technology of heat recovery and blast furnace slag, which is applied in heating devices, recycling technology, and other non-combustion heat generation, can solve the problems of high heat recovery efficiency and liquid slag granulation, and achieve water conservation, good physical and chemical properties, Effect of saving cooling water

Inactive Publication Date: 2007-01-03
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the heat recovery of liquid blast furnace slag, there are two key issues: one is the granulation of liquid slag; the other is how to most effectively conduct heat exchange between high temperature slag and cooling gas to maximize the heat recovery efficiency

Method used

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  • Liquid blast furnace slag pelletizing method and apparatus for heat recovering process
  • Liquid blast furnace slag pelletizing method and apparatus for heat recovering process
  • Liquid blast furnace slag pelletizing method and apparatus for heat recovering process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] Implementation Option 1: If figure 1 , figure 2 As shown, the central part of the spoke of the wheel-spoke granulation device is a solid disc 1, and diamond bars 2 are arranged radially around the disc 1; there are gaps for slag particles to pass between two adjacent diamond bars 2, and the discs 1. The center of the entire spoke rhombus 2 is concave; the bottom of the disk 1 is connected to the motor through the transmission shaft 3; the outermost edge of the disk is provided with a baffle 4, the main purpose of which is to prevent the granulated high-temperature slag from hitting the inner wall of the container , and stick to the wall. There is a smooth transition from the solid disc 1 to the spoke part. The purpose of this design is twofold: one is to protect the lower rotating shaft to avoid damage to the rotating shaft by liquid slag or high-temperature slag; Break up liquid slag well.

[0031] Dozens of rhombus bars are arranged on the spoke part, and the cro...

Embodiment approach 2

[0033] Implementation Option 2: If image 3 , Figure 4 As shown, the main body of the cup-type granulation device is a cup-shaped structure, and the central part is a circular cup 5 with a large upper part and a smaller lower part. The bottom of the cup 5 and the side wall form an obtuse angle; ; The outer ring of the cup 5 is radially arranged with diamond strips 2, and there is a gap for slag particles to pass between two adjacent diamond strips 2; A thorn 7, to strengthen the crushing effect. The length of the thorns is about 5mm.

[0034] The cup 5 is sunken in the entire spoke rhombus 2; the bottom of the cup 5 is connected with the motor through the transmission shaft 3. The cup can be processed into an integral type, or can be processed into a separate type.

[0035] The height of the cup: if it is too high, it may make it difficult for large sticky slag or solid slag to be thrown out from the upper part of the cup.

[0036] Both the height and diameter of the cup...

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Abstract

The present invention is liquid blast furnace slag pelletizing method and apparatus for heat recovering process, and features that the liquid slag blast furnace discharges in downward flow is crushed into grains with the pelletizing apparatus in high speed rotation to produce centrifugal force of throwing the liquid slag. Crushing the liquid slag into relatively homogeneous fine grains can ensure the effective heat exchange between slag and gas. The pelletizing apparatus is one wheel spoke type disc or cup structure capable of ensure the effective recovering of heat from the liquid blast furnace slag.

Description

technical field [0001] The present invention relates to the technology of energy saving and recycling of secondary energy in iron and steel metallurgical process, especially applied to the heat recovery technology of high-temperature liquid blast furnace slag, a by-product produced in blast furnace ironmaking process, and specifically relates to a heat recovery process of liquid blast furnace slag A granulation method and device for medium slag. Background technique [0002] The iron and steel industry is an industry that consumes a lot of energy and resources. In the process of ironmaking, a large amount of heat such as coke consumed enters molten iron and molten steel, coal gas or flue gas, and liquid blast furnace slag. Among them, the proportion of physical heat contained in liquid slag is relatively large. For high-temperature liquid blast furnace slag, due to the high temperature, the accumulated heat is large, and the utilization of its physical heat is one of the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/06B02C19/00F24J3/00
CPCY02W30/50
Inventor 陈登福温良英邱贵宝刘清才佐祥均白晨光孙善长董凌燕
Owner CHONGQING UNIV
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