Heat accumulation type rotary hearth furnace-wet separation-buried arc furnace nickel ore smelting method

An electric furnace smelting and heat storage technology, applied in chemical instruments and methods, solid separation, magnetic separation, etc., can solve the problems of complex process, low efficiency, waste, etc., and achieve the effect of simple process and high efficiency

Active Publication Date: 2010-10-27
北京锦泰诚瑞科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The process is complicated and the efficiency is low. A lot of smoke and dust and waste gas will be generated during the production process, causing great environmental pollution and waste of resources and energy.

Method used

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  • Heat accumulation type rotary hearth furnace-wet separation-buried arc furnace nickel ore smelting method
  • Heat accumulation type rotary hearth furnace-wet separation-buried arc furnace nickel ore smelting method

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specific Embodiment

[0030] Raw material preparation:

[0031] Coal: all kinds of bituminous coal and anthracite;

[0032] Laterite nickel ore: various grades of laterite nickel ore;

[0033] Binder: inorganic binder or organic binder.

[0034] The above-mentioned raw materials are proportioned according to the following parts by weight: coal: 5-10 parts; dust: 80-90 parts; binder: 2-5 parts.

[0035] Refining method:

[0036] Mix the above three raw materials evenly in proportion, make pellets, dry them and put them into the regenerative rotary hearth furnace. The calorific value of the fuel used in the rotary hearth furnace is 750kcal / Nm3~9000kcal / Nm3. Heating to 1100°C-1250°C in a rotary hearth furnace, keeping it for 10-40 minutes, and directly reducing to metallized pellets with a metallization rate of 70%-90%.

[0037] The metallized pellets at 800℃~1000℃ discharged from the rotary hearth furnace through the discharge device are directly sent into the water, and after cooling, they are g...

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Abstract

The invention discloses a heat accumulating type rotary hearth furnace-wet sizing-submerged arc furnace nickel ore smelting method which comprises the following steps: a certain amount of lateritic nickel raw ore is dried, crushed, mixed with coal powder and caking agent, pressed into a ball containing carbon, distributed to a rotary hearth furnace by a distributing device and heated to 900 DEG Cto 1250 DEG C for 10min to 40min; the ball containing carbon is reduced into a metallic ball with 70 percent to 90 percent of metallization rate, discharged by a discharge device, and directly sent into water to be cooled, milled and sized. The iron material containing nickel after milling and sizing is dried by high-temperature oxygen losing waste gas, agglomerated and then sent into a submergedarc furnace or other melting equipment to separate the slag and the iron, and produce molten iron containing nickel. The method has simple process, short process, high efficiency, does not need coking coal, is applicable in the production of ferronickel with lateritic nickel of all grades, and no waste gas, waste water and waste solid is discharged during production.

Description

technical field [0001] The invention relates to a method for producing molten iron through direct reduction in the field of iron and steel metallurgy, in particular to a method for smelting nickel ore in a regenerative rotary hearth furnace-wet separation-submerged arc electric furnace. Background technique [0002] Due to the excellent physical and chemical properties of nickel metal, it is widely used in the national economy, military industry, national defense, etc., and has a large demand. It is a strategic resource that is in short supply in the country. Especially in recent years, the contradiction between supply and demand has become prominent, which has caused the price of nickel to soar. Therefore, how to effectively develop nickel ore resources has become a national focus. [0003] In the prior art, small blast furnaces and electric furnaces are used to produce nickel-iron primary alloy products. [0004] Above-mentioned prior art has following shortcoming at lea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/242B03C1/02C22B23/00
Inventor 吴道洪
Owner 北京锦泰诚瑞科技发展有限公司
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