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Method for producing metallized pellets by using composite carbon-containing pellets and chain belt type roasting machine

A technology of metallized pellets and roaster, applied in the field of metallized pellets

Inactive Publication Date: 2012-08-15
陈小林 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for producing metallized pellets by using composite carbon-containing pellets and chain belt type roasting machine
  • Method for producing metallized pellets by using composite carbon-containing pellets and chain belt type roasting machine
  • Method for producing metallized pellets by using composite carbon-containing pellets and chain belt type roasting machine

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0039] like figure 1 As shown, the chain-belt roaster of the present invention includes a body of furnace 1, a chain-belt machine, a shuttle-type distributing machine 13, a scale plate discharge machine 9 and an air supply chamber 10, and the chain-belt machine includes a chain belt 11, a chain The pulley 8 and the driving device 12, the chain belt 11 is formed by connecting the chain plate 6 through the pin shaft 7, the driving device 12 generally adopts a frequency conversion motor, and its output power drives the chain pulley 8 or the chain belt 11, so that the chain belt 11 winds the chain The pulley 8 rotates; the two ends of the furnace body 1 are respectively provided with a feed port and a discharge port (not marked in the figure), the upper part of the furnace body 1 is provided with a chimney 3, and the top of the chimney 3 is connected ...

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Abstract

The invention discloses a method for producing metallized pellets by using composite carbon-containing pellets. The method comprises the following steps of: preparing carbon-containing pellets by using a raw material mixed with quantitative carbon and iron; preparing cladding powder containing carbon and volatile matters; preparing the composite carbon-containing pellets; and drying the composite carbon-containing pellets, performing high-temperature reductive roasting in a chain belt type roasting machine, quenching with water, de-cladding, and performing magnetic separation and grading treatment, thus obtaining the metallized pellets. The invention also discloses the chain belt type roasting machine. Two ends of a furnace body of the roasting machine are respectively provided with a feeding hole and a discharge hole; the upper part of the furnace body is provided with a chimney; a chain belt and a blowing chamber of a chain belt machine are positioned in the lower space in the furnace body; a distributor and a discharger are respectively arranged at the feeding hole and discharge hole of the furnace body; and a nozzle is arranged at the inner face of the upper wall of the furnace body. The metal intermediate slag mixed with the carbon and the iron is processed into an iron-making high-quality raw material, namely the metallized pellets, so waste is changed into valuables; and the method is low in processing energy consumption and efficient, and can be implemented in a large scale.

Description

technical field [0001] The invention relates to a method for producing metallized pellets and a roasting device, in particular to a method for producing metallized pellets by using composite carbon-containing pellets and a chain-belt roaster. Background technique [0002] The increasing shortage of coal resources for coking is a bottleneck for the sustainable development of the traditional blast furnace ironmaking method that relies too much on high-quality coking coal. [0003] The pre-reduced metallized pellet produced by the coal-based direct reduction method is an effective measure to reduce this dependence. Those whose metallization rate reaches 80-90% or more are called metallized pellets. When the metallization rate reaches 30%-80%, it is called semi-metallized pellets. [0004] According to the practice of using metallized pellets in blast furnaces in the United States and Japan, it is shown that every 10% increase in the metallization rate of pellets can reduce th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/20
Inventor 朱勇陈小林肖伦
Owner 陈小林
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