Energy-saving and production-increasing method of preheating pellet materials by blast furnace tap drain hot smoke

A technology of hot flue gas and agglomeration, applied in blast furnace details, blast furnace, furnace and other directions, can solve the problems of energy waste, heat is not well utilized, etc., to reduce the temperature in the hood, great economic and environmental benefits , the effect of reducing heat radiation

Pending Publication Date: 2019-12-24
湖南建鑫冶金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The large amount of heat taken away by these hot flue gases has not been well utilized, resulting in a great waste of energy

Method used

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  • Energy-saving and production-increasing method of preheating pellet materials by blast furnace tap drain hot smoke
  • Energy-saving and production-increasing method of preheating pellet materials by blast furnace tap drain hot smoke
  • Energy-saving and production-increasing method of preheating pellet materials by blast furnace tap drain hot smoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: at 2600M 3 In the main ditch of blast furnace No. 1 casting yard, carbon-containing blast furnace bag gas ash and zinc-containing steelmaking converter dust are used to form carbon-containing agglomerates containing iron and zinc. The agglomerate is about 40mm. Add 300 kg of agglomerate 15 to the slag high-temperature molten pool, see figure 1 . When opening the tap hole to tap iron, according to the molten iron and slag conditions, continuously add carbon-containing iron-zinc agglomerates and slag steel granular iron material 15 to the high-temperature molten pool of molten iron slag before the iron drop point of main ditch 1 for processing, and at the same time, Move the trolley-type agglomerate material heating and preheating device 2 with a fume hood forward to the dust and mud pellet adding position by relying on the trolley driving mechanism 11, and cover the main ditch 1 with the dust in the ball adding treatment area, and the smoke or dust moves b...

Embodiment 2

[0015] Embodiment two: at 1800M 3 In the main ditch of blast furnace No. 2 casthouse, carbon-containing and iron-containing agglomerates made of coking carbon-containing dust removal ash, electric furnace dust removal ash with high zinc content, and red mud are used. The lump size is about 40mm. Add 200 kg lump 15 to the high temperature molten pool, see figure 2 . When opening the taphole to tap iron, according to the molten iron and slag conditions, continuously add carbon-containing iron-containing agglomerates, magnetically separated iron briquettes, and red mud incineration fly ash and other iron-containing dust into the high-temperature molten iron slag bath in the front section of the main ditch. The carbon-containing agglomerate material 15 pressed with coal powder is processed, and at the same time, the belt fume hood suspended on the top of the main ditch 1 is lifted and the vibration feeding type heating and preheating device 2 is lowered, and the heating and preh...

Embodiment 3

[0016] Embodiment 3: At 1080M 3 Carbon-containing iron and zinc agglomerates made of carbon-containing blast furnace gas ash and high-zinc-containing electric furnace dust in the main ditch of blast furnace No. Figure 4 . When opening the taphole to tap iron, according to the molten iron and slag conditions, continuously add carbon-containing iron-zinc agglomerates, direct reduced iron nuggets, dust sludge, waste incineration fly ash, etc. The compressed agglomerate material 15 is processed, and at the same time, the mobile trolley-type cylindrical heating and preheating device 2 with a smoke hood is moved forward to the position of adding dust and mud pellets by relying on the trolley driving mechanism 11, and the heating and preheating device 2 will Add ball treatment area fume cover, flue gas or flue dust flows backward, open newly added zinc-containing flue gas pipeline valve 16. Similar to Embodiment 1, the agglomerate material heating and preheating device 2 installed...

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Abstract

The invention discloses an energy-saving and production-increasing method of treating pellet materials such as carbon-iron-zinc-containing dust sludge pellets and/or waste steel and slag steel to increase the production of molten iron by using a blast furnace tap drain and preheating the pellet materials by using hot smoke generated during the separation and recycling of zinc powder and belongs tothe field of dust sludge solid waste treatment and energy conservation and emission reduction. The method is characterized in that a large amount of hot smoke generated by tap drain high-temperatureslag iron during blast furnace tapping and a large amount of hot smoke generated by flame combustion during treating the carbon-iron-zinc-containing dust sludge pellets are utilized, a device for heating and preheating the pellet materials such as the carbon-iron-zinc-containing dust sludge pellets and the waste steel and slag steel is installed on the blast furnace tap drain, and the temperatureof the pellet materials added to the tap drain is greatly improved. The method has the advantages that the pellet materials are heated to the high temperature then to be added into the tap drain, partial pre-reduction can occur in advance, the reaction speed is remarkably accelerated, the reaction time and the melting time are greatly shortened, the treatment amount of the pellet materials added into the tap drain can be remarkably improved, the energy is effectively saved, the yields of the molten iron and the grain slag are improved, and the economic and social benefits are increased.

Description

technical field [0001] The invention relates to a method of using the front main ditch of an ironmaking blast furnace to treat carbon-containing iron, zinc, dust and mud agglomerates or waste steel slag steel and other agglomerate materials to increase the output of molten iron and to separate and recover zinc powder by preheating agglomerate materials for energy saving The method for increasing production, especially relates to a method of processing carbon-containing iron, zinc, dust and mud agglomerates in the high-temperature molten iron storage type main ditch of a blast furnace and melting agglomerate materials such as scrap steel slag and steel to obtain molten iron and volatilization and dezincification , use the main ditch hot flue gas to heat and preheat various agglomerate materials, effectively use the large amount of hot flue gas produced by the high temperature slag and iron in the main ditch when the blast furnace is tapping, and deal with the combustion flame of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
CPCC21B5/00C21B2100/66
Inventor 廖辉明
Owner 湖南建鑫冶金科技有限公司
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