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Steel slag and laterite-nickel ore collaborative quenching and tempering treatment device and method

A lateritic nickel ore quenching and tempering treatment technology, which is applied in the field of iron and steel metallurgy, can solve the problems of low grade, high production cost, and uneconomical, and achieve the effects of short operation cycle, high waste heat utilization rate, and energy saving

Pending Publication Date: 2020-11-10
钢研晟华科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] If the limonite-type lateritic nickel ore is used to extract nickel metal or produce ferronickel, the production cost is extremely high and it is very uneconomical; as an ordinary iron ore, its low grade and associated nickel and chromium elements make it only Add in a small amount as a mineral blend at a low price

Method used

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  • Steel slag and laterite-nickel ore collaborative quenching and tempering treatment device and method
  • Steel slag and laterite-nickel ore collaborative quenching and tempering treatment device and method
  • Steel slag and laterite-nickel ore collaborative quenching and tempering treatment device and method

Examples

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Effect test

Embodiment 1

[0107] This example takes a steel factory with an annual output of 4 million tons of steel as an example. The annual output of converter steel slag is 400,000 tons, and the average steel slag discharge rate is 47.62t / h. The hot stuffy slag method was used originally, and the slag utilization rate is about 20%. Now The steel slag is quenched and tempered by the method of synergistic conditioning treatment of steel slag and laterite nickel ore, and 1# high-nickel and low-iron laterite nickel ore is added as a conditioning agent.

[0108] Pour liquid molten steel slag at 1550-1600°C (enthalpy is about 56kg standard coal / t-slag) into the tempering furnace, and mix it with dried 1# high-nickel and low-iron laterite nickel ore (water content is less than 1%), and carry out 60min quenching and tempering treatment. The conditioning process uses full oxygen or oxygen-enriched air as the carrier, and injects coal powder by adjusting the bottom-blown coal oxygen lance and side-blown coal...

Embodiment 2

[0140] Referring to Table 6, the present embodiment processes 400,000 tons of steel slag and 460,000 tons of 2# low-nickel and high-iron laterite nickel ore annually, totaling 860,000 tons, with a total iron content of 20.88% in the steel slag, and 2# low-nickel and high-iron laterite-nickel ore all-iron The content is 44.58%. The steel slag is quenched and tempered by the method of synergistic quenching and tempering treatment of steel slag and lateritic nickel ore mentioned above. Iron oxides are reduced (1550-1600°C) into liquid metal iron through the quenching and tempering furnace bath, and the yield of iron metal is 97.55% %.

[0141] Table 6 Composition and treatment amount of steel slag and 2# low nickel high iron laterite nickel ore

[0142]

[0143] Continued Table 6 Steel slag and 2# low nickel high iron laterite nickel ore composition and processing capacity

[0144]

[0145] Table 7 shows the composition and quantity of pig iron and slag after quenching and...

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Abstract

The invention discloses a steel slag and laterite-nickel ore collaborative quenching and tempering treatment device and method, and belongs to the technical field of ferrous metallurgy. The device andmethod solve the problems that in the prior art, laterite-nickel ore rotary kiln reduction and electric furnace melting separation are high in process energy consumption and low in laterite-nickel ore smelting slag utilization rate, and according to an existing steel slag treatment method, steel slag is poor in stability and poor in activity, and engineering application in the field of building materials is greatly limited. The steel slag and laterite-nickel ore collaborative quenching and tempering treatment device comprises a quenching and tempering furnace and a driving mechanism; the quenching and tempering furnace comprises a quenching and tempering furnace molten pool, a steel slag feeding port and a laterite-nickel ore feeding port are formed in the upper portion of the quenching and tempering furnace, and the quenching and tempering furnace is further provided with coal oxygen lances; the driving mechanism is arranged at the bottom of the quenching and tempering furnace and used for driving the quenching and tempering furnace to swing and rotate; and the device further comprises a molten steel slag hoisting unit which is used for transferring molten steel slag. According to the device and method, when the device is used for steel slag and laterite-nickel ore collaborative quenching and tempering treatment, the operation period is short, the production cost is low, andthe steel slag modification effect is good.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a device and method for coordinated quenching and tempering treatment of steel slag and laterite nickel ore. Background technique [0002] Nickel-chromium is mainly used as an alloying element for the production of stainless steel, high-temperature alloy steel, corrosion-resistant alloys, high-performance special alloys, nickel-based spraying materials, and has important applications in many fields such as military industry and aerospace materials. At present, due to the large demand for nickel in fields such as stainless steel, nickel alloy and electroplating, the consumption of nickel ore resources is increasing. About 30% of the world's exploitable nickel ore resources are nickel sulfide ore, and about 70% are laterite nickel ore. Compared with nickel sulfide ore, the main advantages of developing and utilizing laterite nickel ore are: ① Laterite nickel ore ...

Claims

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Application Information

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IPC IPC(8): C21B3/06C21B3/08C22B7/04
CPCC21B3/06C21B3/08C22B7/04Y02W30/50Y02P10/20
Inventor 周和敏张俊徐洪军沈朋飞齐渊洪林万舟郝晓东王锋严定鎏许海川高建军何鹏王海风
Owner 钢研晟华科技股份有限公司
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