Method for directly reducing hot-pressing forging and rolling part/mechanical part product by utilizing powdery iron mine

A technology of mechanical parts and reduced iron, applied in chemical instruments and methods, solid separation, magnetic separation, etc., can solve the problems of scrap steel backlog and difficult to buy castings

Active Publication Date: 2017-10-20
山东省红森林新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the foundry market also gradually has problems such as a backlog of scrap steel and difficulty in buying castings.

Method used

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  • Method for directly reducing hot-pressing forging and rolling part/mechanical part product by utilizing powdery iron mine
  • Method for directly reducing hot-pressing forging and rolling part/mechanical part product by utilizing powdery iron mine
  • Method for directly reducing hot-pressing forging and rolling part/mechanical part product by utilizing powdery iron mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of powdery iron ore directly reduces the method for iron hot-press counterweight iron nugget (low-grade product), and the steps are as follows:

[0045] (1) Take the alkalinity R of 0.116 and the fineness of 140-160 purpose Hunan Shimen oolitic hematite powder, add 8% hematite powder weight additives to mix and moisten and grind, so that the basicity R is 0.45, and then add Anthracite with a particle size of 0-10mm, 30% by weight of iron ore powder, and a calorific value of 28590kJ / kg, mixed for 10 minutes;

[0046] Among them, the index of Hunan Shimen oolitic hematite powder is shown in Table 1, and the additive formula is shown in Table 2.

[0047] Table 1

[0048]

[0049] Table 2

[0050]

[0051]

[0052] (2) Under the protection of inert gas, separate and reduce the slag and iron in the flame-chambered rotary kiln with a mixing diameter of ￠219mm×22000mm in step (1), and reduce it at 1080°C for 2.5h, and discharge the material under the protecti...

Embodiment 2

[0058] A kind of powdery iron ore directly reduces the method for iron hot-pressing machine part product (middle-grade product), and the steps are as follows:

[0059] (1) get basicity R and be 0.02, fineness be 140-180 purpose iron ore powder (selected from a certain ore dressing plant in Beipiao City, Liaoning Province), mix and grind according to the auxiliary agent that adds iron ore powder weight 2.5%, make it The basicity R is 0.21, then add bituminous coal with a particle size of 0-10mm, a calorific value of 22990kJ / kg, and a weight of 40% iron ore powder, and mix and grind for 10 minutes; the additive formula is shown in Table 4.

[0060] Table 4

[0061]

[0062] (2) Under the protection of inert gas, add the mixed material of step (1) into a flame-chambered rotary kiln with a diameter of ￠219mm×22000mm for separation and reduction of slag and iron, and reduce it at 1050°C for 2.8h, and discharge the material in pulverized coal Cool down to 150°C under protection;...

Embodiment 3

[0070] A method for powdery iron ore to directly reduce iron hot-pressed calcined products (medium-grade products), the steps are as follows:

[0071] (1) get alkalinity R and be 0.02, fineness be 140-180 purpose iron ore powder (selected from a certain ore dressing plant in Beipiao City, Liaoning Province), mix and moisten and grind according to the auxiliary agent that adds iron ore powder weight 3%, make it The basicity R is 0.26, then add bituminous coal with a particle size of 0-10mm, a calorific value of 22990kJ / kg, and 40% of the weight of iron ore powder, and mix and grind for 10 minutes; the additive formula is shown in Table 6.

[0072] Table 6

[0073]

[0074] (2) Under the protection of inert gas, add the mixed material of step (1) into a flame-chambered rotary kiln with a diameter of ￠219mm×22000mm for separation and reduction of slag and iron, and reduce it at 1050°C for 2.8h, and discharge the material in pulverized coal Cool down to 150°C under protection;...

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Abstract

The invention belongs to the field of black metal metallurgy, and particularly relates to a method for directly reducing a hot-pressing forging and rolling part / mechanical part product by utilizing powdery iron mine. A majority of cast iron and blanks of cast steel mechanical parts can be replaced by a product prepared by the invention, and steel rolling materials such as forging materials or steel billets, steel ingots, and plate blanks are produced by adopting the method disclosed by the invention instead of a smelting steel-making method, and chemical metal iron powder can be co-produced. 95 to 98 percent of high-quality particle iron metal iron powder of TFe can be added with a part of alloy powder or non-metal powder, so that higher-end anti-corrosion, wear-resistant, high-temperature resistant and high-strength special steel part products or composite materials are subjected to hot-pressing forging. According to the method disclosed by the invention, a conventional method for fusing and smelting steel iron and fusing and casting and a technological process internationally can be overturned, and a new method for preparing solid-solid state smelting steel iron and mechanical parts with wide sources of raw materials, simple process, simple operation, low cost, energy conservation, environmental protection and circular economy and co-producing chemical engineering metal iron powder is created, and a new milestone for steel iron smelting and casting field is put up internationally.

Description

technical field [0001] The invention belongs to the field of ferrous metallurgy, in particular to a method for powdery iron ore to directly reduce iron hot-pressed calcined materials / mechanical parts products. Background technique [0002] Although iron ore resources are widely distributed in my country, low-poor fine refractory iron ore resources (oolitic hematite, antelope ore, limonite, specularite, hematite, siderite and other refractory minerals; vanadium-titanium magnetic Iron ore (sea sand), iron boron ore, ferromanganese ore, chromite, lateritic nickel ore and other composite ores) are distributed but iron ore resources account for more than 97%, which have not been well utilized and developed so far, resulting in idle resources and Waste, on the contrary, steel mills still need to import a large amount of high-grade iron ore every year, and the import dependence accounts for more than 85% of the total iron ore consumption of steel mills, and there will also be a large...

Claims

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Application Information

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IPC IPC(8): B22F9/20B22F9/04B22F3/14B03C1/02
CPCB03C1/02B22F3/14B22F9/04B22F9/20B22F2003/145
Inventor 唐竹胜唐佳项忠文陈惠忠
Owner 山东省红森林新材料科技有限公司
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