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Blast furnace iron making method

A technology of blast furnace ironmaking and blast furnace furnace, which is applied in the field of blast furnace metallurgy, can solve the problems of high cost of producing molten iron in blast furnace ironmaking, and achieve significant economic benefits, low prices, and reduced investment costs

Inactive Publication Date: 2012-04-04
NINGBO LANDING ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the blast furnace ironmaking method in the prior art also adds vanadium-titanium magnetite concentrate to the blast furnace charge to reduce production costs, such as: Chinese patent number is ZL 200810301134.1, the date of authorization announcement is August 25, 2010, and the invention name is "Blast furnace ironmaking method", the patent relates to a blast furnace ironmaking method, including the steps of preparing sinter, pelletizing and blast furnace smelting, wherein, the preparation of sinter: the sinter raw material contains the following components by weight, vanadium Titanium magnetite concentrate 35-50%, ordinary iron ore 30-45%, fuel and flux 20%; pelletizing: making pellets from vanadium-titanium magnetite concentrate; blast furnace smelting: blast furnace charge contains the following weight ratio The components are: 60-65% of sintered ore, 25-35% of vanadium-titanium magnetite concentrate pellets, and 5-10% of ordinary iron ore, wherein the ordinary iron ore does not contain vanadium Titanium iron ore; but the cost of blast furnace ironmaking to produce molten iron is still high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Blast furnace charge preparation:

[0025] A. Preparation of sintered ore: sintered ore includes the following components accounting for the mass percentage of the total mass of sintered ore: 55% vanadium-titanium magnetite concentrate, 27% ordinary iron ore, 18% fuel and flux; finally add sintered ore to the sintered ore The urea solution with a total mass of 0.02% is specifically added after the sintered ore is made, and the urea solution with a total mass of 0.02% of the sintered ore is added. Among them, ordinary iron ore is iron ore that does not contain vanadium-titanium ore. This embodiment uses domestically produced Magnetite; urea solution can separate ammonia gas during the sintering process, and react with the sulfur oxide released during the sintering process to produce ammonium sulfate, and then use the electrostatic precipitator to capture the ammonium sulfate, and then collect the ammonium sulfate The dust washing system separates the ammonium sulfate ...

Embodiment 2

[0038] 1) Blast furnace charge preparation:

[0039] A. Preparation of sintered ore: sintered ore includes the following components accounting for the mass percentage of the total mass of sintered ore: 57% of vanadium-titanium magnetite concentrate, 25% of ordinary iron ore, 18% of fuel and flux; finally add sintered ore to the sintered ore The urea solution of total mass 0.03%, wherein, common iron ore is the iron ore that does not contain vanadium-titanium ore, and present embodiment selects domestic magnetite for use; Urea solution can separate ammonia gas in sintering process, and with sintering process The sulfur oxide released in the process reacts to produce ammonium sulfate, and then the ammonium sulfate is collected by the electrostatic precipitator, and then the ammonium sulfate is separated from the sintering process by the dust collection ash water washing system;

[0040] B. Preparation of pellets: the vanadium-titanium magnetite concentrate is made into pellets w...

experiment example 3

[0052] 1) Blast furnace charge preparation:

[0053] A. Preparation of sintered ore: sintered ore includes the following components accounting for the mass percentage of the total mass of sintered ore: 55% vanadium-titanium magnetite concentrate, 27% ordinary iron ore, 18% fuel and flux; finally add sintered ore to the sintered ore The urea solution of total mass 0.02%, wherein, common iron ore is the iron ore that does not contain vanadium-titanium ore, and present embodiment selects domestic magnetite for use; Urea solution can separate ammonia gas in sintering process, and with sintering process The sulfur oxide released in the process reacts to produce ammonium sulfate, and then the ammonium sulfate is collected by the electrostatic precipitator, and then the ammonium sulfate is separated from the sintering process by the dust collection ash water washing system;

[0054] B. Preparation of pellets: the vanadium-titanium magnetite concentrate is made into pellets with a par...

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Abstract

The invention relates to a blast furnace iron making method, which comprises the following steps of: 1) blast furnace material preparation: A, agglomerate preparation; B, pellet preparation; and C, carbon-containing pellet production by a rotary hearth furnace; and 2) blast furnace smelting. Compared with the prior art, the method has the characteristic of low production cost on the premise of ensuring the furnace entering grade and the smelting stability of a blast furnace.

Description

technical field [0001] The invention belongs to the field of blast furnace metallurgy, and in particular relates to a blast furnace ironmaking method. Background technique [0002] Blast furnace ironmaking production is the most important link in the metallurgical industry. Blast furnace smelting is a continuous production process that reduces iron ore into pig iron. Solid raw materials such as iron ore, coke and flux are fed into the blast furnace in batches by the furnace top charging device according to the specified ratio, and the furnace throat material level is kept at a certain height. Coke and ore form an alternating layered structure in the furnace, and the ore material is gradually reduced and melted into iron and slag during the descent process, which is gathered in the hearth and released from the iron port and slag port regularly. The production of the blast furnace is carried out continuously. A generation of blast furnaces (from the opening of the furnace to ...

Claims

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Application Information

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IPC IPC(8): C21B5/00C22B1/16
Inventor 李信
Owner NINGBO LANDING ELECTRONICS TECH