Method for removing dust by using electric furnace

A technology of electric furnace and molten steel, which is applied in the direction of improving process efficiency, etc., and can solve problems such as increasing production costs, polluting the environment, and covering agent smoke and dust pollution

Active Publication Date: 2021-05-18
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in order to ensure the feeding effect of the riser end after the steel ingot is poured, a covering agent will be added to the riser end of the steel ingot; after the conventional steel ingot covering agent is added, a large amount of smoke and dust and toxic gases will be generated due to combustion and heat, which will not only pollute the environment, but also cause harm to the staff. There is a serious threat to the health of
[0004] At present, the pressure of environmental pollution in iron and steel enterprises is relatively high, and the dust pollution caused by covering agents used in normal steel ingots is serious, especially for high-efficiency heating agents, which not only pollute the environment, but also increase production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Prepare the forged steel back-up roll made of Cr3. The steel ingot is produced by the bottom injection ingot method with the ingot shape of 11.5t*3, and the 12-15t series ingot mold is used. The steel ingot is forged into a roll blank, and then processed into a roll after heat treatment.

[0034] Use the recovered electric furnace dust to replace the covering agent, which specifically includes the following steps:

[0035] Step 1, filtering: filter the recovered dust from the electric furnace in a filter to remove the dust from the electric furnace with large particle size and other impurities; the mesh of the filter is 200 mesh, and the particle size is 0.075 mm.

[0036] Step 2, drying: spread the filtered electric furnace dedusting ash in a drying container, and place the dried electric furnace dedusting ash in a drying chamber to fully dry; The thickness is 2mm; the drying room is heated by side wall resistance wire, the heating temperature is 70°C, the air humidity...

Embodiment 2

[0042] Prepare the forged steel back-up roll made of Cr5, adopt the ingot type 17t*2 bottom injection ingot method to produce steel ingots, use 16-20t series ingot molds, and then forge the steel ingots into roll blanks, and then process them into rolls after heat treatment.

[0043] Use the recovered electric furnace dust to replace the covering agent, which specifically includes the following steps:

[0044] Step 1, filtering: filter the recovered dust from the electric furnace in a filter to remove the dust from the electric furnace with large particle size and other impurities; the mesh of the filter is 200 mesh, and the particle size is 0.075 mm.

[0045] Step 2, drying: spread the filtered electric furnace dedusting ash in a drying container, and place the electric furnace dedusting ash in a drying chamber for drying; the tiled thickness of the electric furnace dedusting ash in the drying container 3mm; the drying room is heated by side wall resistance wire, the heating ...

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Abstract

The invention discloses a method for removing dust by using an electric furnace, and belongs to the technical field of dedusting ash recycling in the metallurgical industry. According to the method, the recycled electric furnace dedusting ash is used for replacing a covering agent, the recycled electric furnace dedusting ash is filtered, dried, stored and prepared, when the liquid level of molten steel poured by a bottom pouring steel ingot rises to the elevation of a riser, firstly, carbonized rice husks are put into ingot mould riser molten steel and spread flatly, then prepared electric furnace dedusting ash is directly put into the carbonized rice husks spread flatly on the ingot mould riser molten steel, and the dedusting ash is spread flatly to cover the ingot mould riser end through an iron rake. According to the method, on the premise that the quality of steel ingot products is guaranteed, the electric furnace dedusting ash is used for replacing a covering agent, waste electric furnace dedusting ash generated by enterprises is fully utilized, the production cost can be reduced, and meanwhile smoke pollution can be avoided.

Description

technical field [0001] The invention relates to the technical field of dust removal ash recovery and utilization in the metallurgical industry, in particular to a method for removing dust ash by using an electric furnace, which is used for manufacturers who use an electric arc furnace to smelt molten steel and cast small-tonnage steel ingots. Background technique [0002] Dust removal ash is the dust recovered by the dust removal system from the smoke generated in the electric arc furnace smelting process, and its main component is Fe 2 o 3 ; Dust removal ash belongs to the useless product in the roll factory, and is generally directly treated as waste. [0003] At present, in order to ensure the feeding effect of the riser end after the steel ingot is poured, a covering agent will be added to the riser end of the steel ingot; after the conventional steel ingot covering agent is added, a large amount of smoke and dust and toxic gases will be generated due to combustion and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00B22D7/00
CPCC21C7/00B22D7/00Y02P10/20
Inventor 辛胜朋韩维国宁江马仁禄
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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