Organic adhesive and blast furnace ironmaking pellet prepared from same

An organic binder and iron-making ball technology, which is applied in the field of organic binders and iron-making pellets produced with the same, can solve the problem of reducing the iron-containing grade of the pellets, increasing the amount of blast furnace iron-making slag, and increasing the coke ratio. Advanced problems, to achieve the effect of good physical and chemical properties, low cost, convenient transportation

Inactive Publication Date: 2015-02-18
湖北征梦农产品开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the proportion of bentonite used in the pellet production process is too large, it will not only reduce the iron grade of the pellets, but also increase the amount of slag in blast furnace ironmaking, resulting in an increase in the coke ratio and a waste of energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0028] Iron concentrate powder is used as raw material, the addition ratio of organic binder is 0.1%, and the addition ratio of calcium-based bentonite is 0.9%.

[0029] Requirements: The moisture content of the iron ore concentrate used in production is 8-9%, of which the total iron (TFe) content in the iron ore concentrate powder is 64.76%, the main component in the iron ore concentrate powder is magnetite, and the ore particle size is less than 74μm The proportion reached 85.4%.

[0030] During the pelletizing process, iron ore concentrate powder is fully mixed with organic binder and calcium-based bentonite after drying, and then sent to the disc pelletizer for pelletizing; the disc pelletizer rotates at 22r / min, and the inclination angle is set at Set at 45°; the pelletizing time is set at 16 minutes. After the pelletizing is completed, select green pellets with a diameter of 10-12mm to measure their drop strength and compressive strength. The pellets are dried at 110°C a...

Embodiment example 2

[0036] Iron concentrate powder is used as raw material, the addition ratio of organic binder is 0.3%, and the addition ratio of calcium-based bentonite is 0.7%.

[0037] Requirements: The moisture content of the ore used in production is 8-9%, the total iron (TFe) content is 64.76%, the main component of iron concentrate is magnetite, and the proportion of ore particle size less than 74μm reaches 85.4%.

[0038] During the pelletizing process, the iron concentrate is fully mixed with organic binder and calcium-based bentonite after drying, and then sent to the disc pelletizer for pelletizing; the disc pelletizer speed is set to 20r / min, and the inclination angle is set to is 45°. The pelleting time was set at 18 minutes. After the pelletizing is completed, select green pellets with a diameter of 10-12mm to measure their drop strength, compressive strength and static explosion temperature, and the static explosion temperature is 750°C. After the green balls are dried at 120°C...

Embodiment example 3

[0044] Iron concentrate powder is used as raw material, the addition ratio of organic binder is 0.5%, and the addition ratio of calcium-based bentonite is 1%.

[0045] Requirements: The total iron (TFe) content of the ore used in production is 65.6%, the main component of iron concentrate is magnetite, and the proportion of ore particle size less than 74μm reaches 90%.

[0046] During the pelletizing process, the iron ore concentrate is fully mixed with an organic binder and calcium-based bentonite after drying, and then sent to a disc pelletizer for pelletizing; the disc pelletizer speed is set at 25r / min, and the inclination angle is set to is 45°. The pelleting time was set at 21 minutes. After the pelletizing is completed, select green pellets with a diameter of 10-12 mm, and measure their drop strength and compressive strength. After the green balls are dried at 120°C, they are sent to a horizontal tube furnace for roasting at a roasting temperature of 1250°C and a roas...

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Abstract

The invention relates to an organic adhesive and an ironmaking pellet prepared from the organic adhesive. The organic adhesive is prepared by the following steps: mixing one or composition of rice, chaff, glutinous rice and corn in a ratio of 2:3:1:4, bulking with a bulking machine at 250-280 DEG C under the pressure of 1.1-1.2 MPa, and pulverizing to obtain the powder with the particle size of 150-200 mu m. The ironmaking pellet is prepared by pelletizing 0.1-0.5% of organic adhesive, 1-1.5% of calcium bentonite and the balance of iron concentrate powder. The organic adhesive is safe and reliable, and is convenient for transportation. The preparation technique is easy to operate, has the advantages of low cost, accessible raw materials and the like, and can enhance the physicochemical properties of the pellets in the pellet production. When the organic adhesive is used in the process of producing steelmaking slag, pipeline ash pellets, fluorite pellets and the like, the produced industrial finished product has favorable physicochemical properties, and the organic adhesive can solve the trouble and problems caused by other adhesives.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy sintered pellet production, in particular to an organic binder and ironmaking pellets produced by using the same. Background technique [0002] Iron ore pellets have good metallurgical properties and the characteristics of improving the air permeability of the blast furnace material column, so they are an indispensable raw material in blast furnace ironmaking. In recent years, the proportion of iron ore pellets in blast furnace ironmaking raw materials is increasing. bigger and bigger. [0003] At present, bentonite is mainly used as a binder in the production process of pellets. As a binder for pellet production, bentonite has the advantages of good pelletizing performance and sufficient resources; however, bentonite will not decompose and volatilize when the pellets are roasted at high temperature, and Bentonite contains high amounts of silica. Therefore, if the proportion of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/244
CPCC22B1/244
Inventor 陈锐周建安倪红卫邓冬一张华魏康
Owner 湖北征梦农产品开发有限公司
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