Technological method for reducing block masses containing carbon, iron, zinc, etc. into molten iron, zinc, etc. in blast furnace molten iron trough

A technology for tapping iron from molten iron ditch and blast furnace, which is applied to blast furnaces, blast furnace details, furnaces, etc., can solve problems such as environmental pollution, waste of resources, and large investment, and achieve the effects of reducing silicon content in molten iron, increasing production, and reducing fuel consumption costs.

Active Publication Date: 2016-02-03
廖辉明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, stockpiling takeaways pollutes the environment and wastes resources. Whether it is building a sorting plant or adopting a rotary hearth furnace, rotary kiln, or shaft furnace to produce direct reduced iron, there are problems of large investment, high energy consumption, and high cost.

Method used

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  • Technological method for reducing block masses containing carbon, iron, zinc, etc. into molten iron, zinc, etc. in blast furnace molten iron trough
  • Technological method for reducing block masses containing carbon, iron, zinc, etc. into molten iron, zinc, etc. in blast furnace molten iron trough
  • Technological method for reducing block masses containing carbon, iron, zinc, etc. into molten iron, zinc, etc. in blast furnace molten iron trough

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Example 1: At 820M 3 The carbon-containing iron and zinc oxide agglomerates made by adding carbon-containing blast furnace gravity dust to the iron-storage-type hot metal ditch of the No. 1 iron casting yard of blast furnace, with a lump size of about 20mm, go to the molten iron ditch and add 500 kg of agglomerates When the iron is tapped, the slag and iron stream spewing out from the iron mouth forms a large vortex at the falling point, and the temperature is about 1500 ℃. It reacts and melts quickly, producing a large amount of smoke, the reduced iron becomes molten iron, the molten slag and the molten slag in the molten iron ditch enter the slag flushing ditch to become water slag, and the elements such as zinc are reduced into smoke and inhaled into the dust hood in front of the furnace. It is collected and recycled in the bag filter in front of the furnace. The iron output is 120 tons.

[0007] Chunk ingredients:

[0008]

Embodiment 2

[0009] Example 2: At 820M 3 The carbon-containing iron and zinc oxide agglomerates are made of carbon-containing blast furnace gas ash and high-zinc-containing powder ash for reducing iron production in the iron-storage-type hot metal ditch of the No. 1 iron casting yard of blast furnace. , add 1 ton of agglomerates, add 50 kg of agglomerates to the iron ditch for tapping, and continuously add the remaining agglomerates into the molten iron ditch when tapping is opened. The strands form a large vortex at the falling point, the temperature is about 1500℃, the agglomerates react and melt rapidly in the molten iron ditch together with the churning high-temperature molten iron and slag, producing a large amount of smoke, the reduced iron becomes molten iron, and the molten iron becomes molten iron. The slag enters the slag flushing ditch together with the molten slag in the molten iron ditch to become water slag. After the reduction of zinc and other elements, the slag is sucked i...

Embodiment 3

[0012] Example three: at 820M 3 Carbon-containing iron and zinc oxide agglomerates made of carbon-containing blast furnace gas ash and converter dust ash, blast furnace gas ash and sintering dust ash, and steel slag tailings were used in the iron-storing hot metal ditch of the No. 2 blast furnace. 1 and block 2, the block size is about 30mm. First, use the crane to lift the block 1 into the small hopper. When the iron mouth is opened, 2 tons of agglomerates are continuously added to the iron ditch through the valve and the feeding pipe. 1. The blanking pipe is facing the drop point of the molten iron in the tap hole. When the iron is tapped, the slag and iron streams spewing out from the tap hole form a large vortex at the point where the molten iron falls. The high-temperature molten iron and molten slag being churned in the large vortex react and melt rapidly, producing a large amount of smoke, the reduced iron becomes molten iron, and the molten slag enters the slag flushin...

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Abstract

Te invention discloses a production technological method for reducing oxide block masses (pellets) containing carbon, iron and/or zinc, etc. into molten iron and/or zinc, etc. in a blast furnace molten iron trough (containing a swing flow spout in front of a furnace) and belongs to the field of steel metallurgy. The production technological method is characterized in that the oxide block masses containing the carbon, iron and/or zinc, etc. are added into the blast furnace molten iron trough before blast-furnace tapping and/or during tapping, so that the iron and/or zinc, etc. in the block masses are obtained in a reduction mode through the carbon. The production technological method has the advantages that one kind or several kinds of industrial powder material of cheap blast furnace gas dust (or gas mud), gravitational dust collection dust, sintering machine dust collection dust, converter dust collection dust (or mud), steelmaking steel slag powder, oxidized iron scales, reduced iron powder, etc. and reductants of carbon-containing coal powder, coke powder, etc. are mixed and made into the block masses, the block masses are added into the blast furnace molten iron trough, and the zinc is recovered through increased iron and/or dezincification; the industrial powder material difficult to treat is treated well, so that good economic and social benefits are achieved. Meanwhile, the effect of molten iron desilicication is further achieved.

Description

technical field [0001] The invention relates to a production process method for pre-treating industrial powder in iron-making blast furnaces in the iron and steel metallurgical industry to increase the output of molten iron and or to extract zinc, in particular to a method for using oxide agglomerates such as carbon-containing iron and or zinc (Pellet) in the blast furnace molten iron ditch (including the swing nozzle of the molten iron ditch in front of the furnace, the same below) is reduced to molten iron and or zinc and other production processes. Background technique [0002] The iron and steel industry produces a large amount of dust and sludge containing iron or harmful elements during production. Usually, some iron-containing dusts and sludges are used in whole or in part as sintering materials, while other iron-containing dusts and sludges contain high levels of harmful elements such as zinc, lead, potassium, sodium, chlorine, etc. Repeated use will continuously en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/02C22B19/00
Inventor 廖辉明
Owner 廖辉明
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