Preparing method of sintered ore

A technology for sintered ore and concentrate, which is applied in the field of sintered ore preparation and can solve problems such as difficulty in removing zinc

Inactive Publication Date: 2017-02-01
INNER MONGOLIA BAOTOU STEEL UNION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the case of general sintering with carbon content, zinc is not easy to remove

Method used

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  • Preparing method of sintered ore
  • Preparing method of sintered ore
  • Preparing method of sintered ore

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preparation example Construction

[0026] The invention discloses a method for preparing sintered ore, and those skilled in the art can learn from the content of this article and appropriately improve the process parameters to realize it. In particular, it should be pointed out that all similar replacements and modifications are obvious to those skilled in the art, and they are all considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and the relevant personnel can obviously make changes or appropriate changes and combinations to the method and application described herein without departing from the content, spirit and scope of the present invention to realize and Apply the technology of the present invention.

[0027] The present invention provides a kind of preparation method of sintered ore, it comprises:

[0028] Step S1, preparing raw materials, the ratio of the raw materials is as follows:

[0029]

...

Embodiment 1

[0056] According to the raw materials shown in Table 1 and the proportioning ingredients. The raw materials were uniformly mixed in the primary mixing, and then granulated in the secondary mixing machine. The granulation time was 3 minutes, and the mass percentage of water in the mixing was controlled at 7.5%. The granulated mixture is evenly distributed on the sintering machine trolley through the distributor. The thickness of the material layer is 700mm. It is ignited by the igniter of the sintering head. The ignition fuel is coke oven gas, and the ignition time is 1.5min. At the same time, the sintering machine The bottom starts to draw air, and a certain negative pressure is formed under the furnace grate. The ignition negative pressure is 11000Pa. After ignition, the air is drawn from the top to the bottom through the sintering material layer, and the sintering flue gas is discharged into the atmosphere after the desulfurization process. The sintering ventilation negative ...

Embodiment 2

[0059] According to the raw materials shown in Table 1 and the proportioning ingredients. The raw materials were uniformly mixed in the primary mixing, and then granulated in the secondary mixing machine. The granulation time was 4 minutes, and the mass percentage of water in the mixing was controlled at 7.8%. The granulated mixture is evenly distributed on the sintering machine trolley through the distributor. The thickness of the material layer is 700mm. It is ignited by the igniter of the sintering head. The ignition fuel is coke oven gas, and the ignition time is 2.0min. At the same time, the sintering machine The bottom starts to draw air, and a certain negative pressure is formed under the furnace grate. The ignition negative pressure is 11000Pa. After ignition, the air is drawn from the top to the bottom through the sintering material layer, and the sintering flue gas is discharged into the atmosphere after the desulfurization process. The sintering ventilation negative ...

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Abstract

The invention relates to the technical field of sintered ore, in particular to a preparing method of the sintered ore. The method comprises the steps of S1, preparing raw materials, wherein the raw materials comprise a mixed iron concentrate containing tin, arsenic and zinc, an iron concentrate, first iron mineral powder, second iron mineral powder, third iron mineral powder, steel slag powder, limestone, light burned dolomite, quick lime, coke powder and blast furnace return fines; S2, carrying out pelleting after water is added into the raw materials for mixing, and obtaining a mixture; S3, sintering the mixture, and obtaining the sintered ore. According to the method, the mixed iron concentrate containing tin, arsenic and zinc is matched with other iron materials, under the condition that it is ensured that the content of tin, arsenic and zinc of the sintered ore meets blast furnace smelting and steel product requirements, the part of iron concentrate can be effectively used for producing the sintered ore, enough strength of the sintered ore is ensured, and meanwhile the burdening cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of sintered ore, in particular to a preparation method of sintered ore. Background technique [0002] Tin, arsenic and zinc are harmful impurity elements in steel, which will have different degrees of harm to the performance of steel grades. In the blast furnace ironmaking process, zinc metal will also cause blast furnace nodules, corrode the furnace lining, and damage the metallurgical properties of iron ore and coke, and it is easy to circulate and enrich in the blast furnace smelting, which intensifies its harm to the blast furnace smelting. When the content in steel exceeds a certain limit, it will significantly reduce the high-temperature mechanical properties of steel, increase the high-temperature brittleness of steel, reduce the strength and toughness of steel, and make steel brittle; excessive arsenic content in steel will cause cold and brittle steel products It also affects the mechanical propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22B1/24
CPCC22B1/16C22B1/2406
Inventor 李玉柱吕志义刘周利白晓光康文革
Owner INNER MONGOLIA BAOTOU STEEL UNION
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