Device and method for synergistic quenching and tempering treatment of steel slag and nonferrous metal smelting slag

A non-ferrous metal, quenching and tempering technology, applied in the field of iron and steel metallurgy, can solve the problems of site construction and maintenance costs, less than 1%, secondary waste of resources, etc. The effect of energy consumption

Pending Publication Date: 2020-11-13
钢研晟华科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the utilization rate of copper in copper slag does not exceed 12%, while the utilization rate of iron is less than 1%. Therefore, the development of new technologies to comprehensively utilize copper slag resources and extract valuable metals such as iron can promote the sustainable development of the metallurgical industry. Conducive to the ra

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  • Device and method for synergistic quenching and tempering treatment of steel slag and nonferrous metal smelting slag
  • Device and method for synergistic quenching and tempering treatment of steel slag and nonferrous metal smelting slag
  • Device and method for synergistic quenching and tempering treatment of steel slag and nonferrous metal smelting slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0128] In this example, a steel plant has an annual output of 4 million tons of steel, an annual output of 400,000 tons of converter steel slag, and an average hourly slag discharge of 47.62 t / h. Originally, the hot stuffy slag method was used, and the slag utilization rate was about 20%. The above-mentioned method of synergistic conditioning and tempering treatment of steel slag and non-ferrous metal smelting slag, by adding copper slag and red mud as a conditioning agent, pouring liquid molten steel slag at 1550-1600 °C (enthalpy about 56kg standard coal / t-slag) In the quenching and tempering furnace, add the dried copper slag and red mud, and perform a 60-min quenching and tempering treatment. In the quenching and tempering process, the oxygen-enriched air is used as the carrier, and the coal powder is sprayed through the coal oxygen lance to reduce the iron oxides in the steel slag, copper slag and red mud. The high-temperature liquid molten iron (pig iron) after quenching...

Embodiment 2

[0149] In this embodiment, 400,000 tons of steel slag and 460,000 tons of red mud are processed annually, totaling 860,000 tons. The total iron content in steel slag is 20.88%, and the total iron content in red mud is 37.72%. ~1600°C) into liquid metal iron, and the yield of iron metal is 96.22%.

[0150] Table 6 shows the composition and treatment amount of steel slag and red mud conditioner.

[0151] Table 6 Steel slag and red mud conditioner composition (%) and treatment amount

[0152] raw material TF Mfe Fe 2 o 3

Fe 3 o 4

FeO CaO SiO 2

Al 2 o 3

MgO K 2 o

Na 2 o

steel slag 20.88 7.9 10 10.42 41.4 14.96 0.84 5.49 0.12 0.14 red mud 37.72 53.89 14.02 7.62 16.04 0.63 0.04 4.38 average composition 29.89 0.00 32.50 4.65 4.85 26.75 11.03 8.97 2.89 0.08 2.41 PCI 0.5 5 4 0.4

[0153] Continued Table 6 Steel slag and red mud conditioner compos...

Embodiment 3

[0169] The present embodiment processes 400,000 tons of steel slag and 460,000 tons of copper slag annually, totaling 860,000 tons. The steel slag has a total iron content of 20.88%, and copper slag has a total iron content of 41.93%. ~1600°C) into liquid metal iron, and the yield of iron metal is 95.98%.

[0170] Table 11 shows the composition and treatment amount of steel slag and copper slag conditioner.

[0171] Table 11 Steel slag and copper slag conditioning agent composition (%) and treatment capacity

[0172] raw material TF Mfe Fe 2 o 3

Fe 3 o 4

FeO CaO SiO 2

Al 2 o 3

MgO K 2 o

Na 2 o

steel slag 20.88 7.9 10 10.42 41.4 14.96 0.84 5.49 0.12 0.14 copper slag 41.93 0.64 3.96 7.28 42.74 3.84 29.79 3.92 1.04 0.77 0.44 average composition 32.14 0.34 5.79 8.55 27.71 21.31 22.89 2.49 3.11 0.47 0.30 PCI 0.5 5 4 0.4

[0173] Continued Table ...

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Abstract

The invention discloses a device and a method for synergistic quenching and tempering treatment of steel slag and nonferrous metal smelting slag, and belongs to the technical field of iron and steel metallurgy. The problems that in the prior art, metal resources in the nonferrous metal smelting slag are difficult to recover, slag stacking and stacking environment pollution are serious, high-temperature sensible heat of the steel slag is not fully utilized in a prior steel slag treatment method, and iron oxide in the steel slag is low in recovery rate are solved. The device for synergistic quenching and tempering treatment comprises a quenching and tempering furnace and a driving mechanism, wherein the quenching and tempering furnace comprises a quenching and tempering furnace molten pool,the upper part of the quenching and tempering furnace is provided with a steel slag inlet and a nonferrous metal smelting slag inlet, and the quenching and tempering furnace is also provided with a coal oxygen lance; 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 drying pretreatment unit. The device can carry out synergistic quenching and tempering treatment on steel slag and nonferrous metal smelting slag to realize steel slag modification and iron resource recovery; and the quenched and tempered slag can be used as a cement raw material or an artificial sand stone material for buildings after being treated.

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 nonferrous metal smelting slag. Background technique [0002] Steel slag is solid waste discharged during the steelmaking process. Its main sources are slagging materials added during the smelting process, eroded furnace lining refractory materials during the smelting process, and sediment brought in by solid materials. At present, the discharge of domestic steel slag is 8% to 15% of steel production, about 140 million tons per year, accounting for about 24% of the total industrial solid waste. At present, steel slag is mainly used in the cushion, structural layer, and Asphalt mixture, slag fertilizer, pit filling, steel slag cement and cementitious materials, etc. [0003] Steel slag is also a high-quality waste heat resource. The temperature of liquid steel slag is 1450-16...

Claims

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Application Information

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IPC IPC(8): C21B3/06C21B3/08C21B13/00C22B7/00C22B7/04C22B13/02C22B19/20C22B19/30C22B26/10C04B5/00C01G21/02C01G9/02C04B7/147C04B18/14
CPCC21B3/06C21B3/08C21B13/0006C22B7/001C22B7/04C22B13/025C22B19/20C22B19/30C22B26/10C04B5/00C01G21/02C01G9/02C04B7/147C04B18/141C21B2400/066C21B2100/62C21B2400/024C21B2100/44C21B2100/42Y02W30/50Y02W30/91Y02P10/20Y02P40/10
Inventor 周和敏齐渊洪沈朋飞徐洪军张俊王锋林万舟郝晓东严定鎏许海川何鹏高建军王海风
Owner 钢研晟华科技股份有限公司
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