Iron ore reducing agent, iron ore mixture and method for reducing iron ore

A technology of iron ore and reducing agent, applied in the field of iron ore reducing agent, can solve the problems that specular iron ore cannot be used, resources have not been developed and utilized, unfavorable sintering, pelletizing, agglomeration, etc.

Inactive Publication Date: 2012-09-26
LANGWEI RESOURCE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Indonesian island country is rich in this kind of titanium magnetite with low titanium content. Because there is no suitable dressing and smelting method, this resource has not been developed and utilized.
[0005] In addition, some iron ores are not suitable for ironmaking. For example, specularite is a kind of hematite with a scaly structure, which is extremely unfavorable for sintering, pelletizing, and agglomeration. Iron ore is used solely for blast furnace ironmaking

Method used

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  • Iron ore reducing agent, iron ore mixture and method for reducing iron ore
  • Iron ore reducing agent, iron ore mixture and method for reducing iron ore
  • Iron ore reducing agent, iron ore mixture and method for reducing iron ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0128] The preparation of embodiment 1-5 iron ore mixture 1-5

[0129] Under normal temperature and pressure, iron ore powder, anthracite and lime were uniformly mixed as shown in Table 1 in conventional mixing equipment to obtain iron ore mixture 1-5.

[0130] Table 1 Iron Ore Mixture 1-5

[0131]

[0132]

[0133] Note: TFe: total iron content, based on ore weight

[0134] C%: fixed carbon content, based on the weight of ore or anthracite

[0135] Ash %: Ash content, based on the weight of anthracite coal

[0136] The remaining weight percentages are based on the weight of the corresponding material (iron ore, anthracite, lime)

Embodiment 6-10

[0137] Embodiment 6-10 reduction reaction and obtain iron powder

[0138] Put the iron ore mixture 1-5 obtained above into a silicon carbide reduction tank, put the tank into a tunnel kiln, and use liquefied gas as fuel under the conditions shown in Table 2 below to preheat and For the reduction reaction, the air volume is controlled so that the combustion flame in the tunnel kiln is orange, thereby ensuring that the reaction step is carried out under a reducing atmosphere. After a predetermined reaction time, the product is cooled and crushed to a particle size of less than 0.3mm, and then iron powder is magnetically separated. Table 2 also gives the total iron content, yield and other impurity information of the obtained iron powder. During the preheating process, all examples were heated from ambient temperature to 1100° C. within the time shown in Table 2. The whole preheating and reduction reaction process is carried out under normal pressure.

[0139] Table 2

[0140...

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Abstract

The invention relates to an iron ore reducing agent which comprises 8-35 parts by weight of amorphous carbon, and 4-35 parts by weight of calcium oxide. The invention also relates to an iron ore mixture and a method for reducing iron ore.

Description

technical field [0001] The application relates to an iron ore reducing agent, comprising 8-35 parts by weight of amorphous carbon and 4-35 parts by weight of calcium oxide. The present application also relates to an iron ore mixture comprising the iron ore reducing agent and a method for reducing iron ore using the iron ore reducing agent. Background technique [0002] Generally speaking, according to the type of iron-containing minerals, iron ore is divided into magnetite ore, hematite ore, pseudo or semi-pseudo hematite, vanadium-titanium magnetite, limonite, siderite and A mixed ore composed of two or more iron-bearing minerals. Iron ore can also be divided into high-sulfur iron ore, low-sulfur iron ore, high-phosphorus iron ore, and low-phosphorus iron ore according to impurities. [0003] Generally speaking, it is desirable to use iron ore with high iron content and low impurity content for ironmaking. However, it is desirable to have higher levels of beneficial impu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/00C21B15/02C22B5/10
CPCC21B13/0066C22B1/00
Inventor 韩谊
Owner LANGWEI RESOURCE
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