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Novel metallurgy and casting integration method

An integrated method and a new type of technology, applied in the field of smelting and casting, can solve the problems of coke and coal consumption, energy consumption and high production costs, and achieve the effects of reducing pig iron costs, no return to ore, and saving capital investment.

Inactive Publication Date: 2011-08-03
中国工业投资(国际)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sinter and pellets emit a large amount of and Harmful gas, and consume a lot of coke and coal. At the same time, the sintered ore is repeatedly heated and reduced in the blast furnace. The energy consumption and production cost are very high, which directly increases the price of pig iron and steel.

Method used

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Examples

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Embodiment 1

[0012] The invention provides a novel metallurgical casting integration method, the steps of which are:

[0013] Step 1. Dry and dehydrate the coke powder, control the moisture to ≤8%, enter the horizontal pulverizer, crush it to a particle size of 1-3mm, and then mix it into the fine iron powder with a particle size of 170-200 mesh. Powder and coke powder are mixed at 70:30, then 6% binder and 1% high-alumina clay are added by weight, and then fully rolled and mixed by double-screw mixer and wheel-roller machine, and then enter the double-roller forming machine (or Vertical high-pressure forming machine) cold-pressed to form iron coke pellets with a diameter of 50mm or adjusted according to the requirements of the smelting process, wherein the binder is composed of sodium humic acid base, caustic soda: humic acid: water Mix at a weight ratio of 1:18:50, first add caustic soda to water, heat to 90°C, stir for 30 minutes, then add humic acid, heat to 95°C and stir for 2 hours. ...

Embodiment 2

[0018] The invention provides a novel metallurgical casting integration method, the steps of which are:

[0019] Step 1. Dry and dehydrate the coke powder, control the moisture to ≤8%, enter the horizontal pulverizer, crush it to a particle size of 1-3mm, and then mix it into the fine iron powder with a particle size of 170-200 mesh. Powder and coke powder are mixed at 70:30, then 7% binder and 2% high alumina clay are added by weight, and then fully rolled and mixed by double-screw mixer and wheel roller machine, and then enter the double-roll molding machine (or Vertical high-pressure forming machine) cold-pressed to form iron coke pellets with a diameter of 50mm or adjusted according to the requirements of the smelting process, wherein the binder is composed of sodium humic acid base, caustic soda: humic acid: water Mix at a weight ratio of 1:18:50, first add caustic soda to water, heat to 90°C, stir for 30 minutes, then add humic acid, heat to 95°C and stir for 2 hours.

...

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Abstract

The invention provides a novel metallurgy and casting integration method, which is characterized by comprising the following steps of: proportioning and mixing fine iron powder and dust coke, adding an adhesive, and performing cold moulding to prepare iron coke pellets; charging the iron coke pellets in an internal combustion high temperature furnace, and roasting at high temperature by isolating air; proportioning the internal combustion iron coke pellets and pig iron, and smelting in a smelting furnace to obtain qualified molten iron; and finally casting into pig iron castings in various specifications and models. In the novel metallurgy and casting integration method is continuously carried out stably in the high temperature furnace in the uniform reducing atmosphere, the hot strength and air permeability of the iron coke pellets are improved, the defects of high energy consumption and high pollution of a blast-furnace ironmaking method are overcome, process energy consumption for each ton of iron can be reduced by about 300kg of coke, the pig iron cost is reduced by about 600 yuan / ton, and the capital investment for building a sintering plant is saved, and return ore and pollution are avoided.

Description

technical field [0001] The invention relates to an ironmaking method and belongs to the technical field of smelting and casting. Background technique [0002] In the traditional blast furnace ironmaking method, before entering the blast furnace, iron fine powder, calcium oxide, dolomite powder and coke powder white coal are mixed, oxidized and sintered at high temperature to form agglomerates, and shaped into sintered ore. Or wetting the iron fine powder into small balls and putting them into a shaft furnace to calcinate into pellets, and then adding them to the blast furnace for ironmaking. Sinter and pellets emit a large amount of and Harmful gases also consume a lot of coke and coal. At the same time, the sintered ore is repeatedly heated and reduced in the blast furnace. The energy consumption and production cost are very high, which directly increases the price of pig iron and steel. Contents of the invention [0003] The purpose of the invention is to provide an...

Claims

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Application Information

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IPC IPC(8): C21B11/00C22B1/24
Inventor 黄朝健黄朝龙
Owner 中国工业投资(国际)有限公司
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