Thermal-state slag online modification device

A modification device and a technology for hot slag, applied in the field of hot slag online modification device, can solve the problems of difficulty in realizing, not realizing slag modification, low waste heat recovery efficiency, etc., and reduce conventional processing technology. , The effect of a wide range of applicable raw materials, reducing the floor space and the degree of wear and tear of the equipment

Active Publication Date: 2014-06-04
京津冀钢铁联盟(迁安)协同创新研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent "a liquid steel slag treatment process and device" (CN101691620A) uses gas as a medium to recover the waste heat in the steel slag and realize the granulation of the steel slag, bu...

Method used

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  • Thermal-state slag online modification device
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  • Thermal-state slag online modification device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Coal powder, ball milled through 100-mesh standard sieve, particle size <0.15mm, ash content 14.08%.

[0036] The liquefied petroleum gas and air are fed into the ignition burner 17 and the supplementary heat burner 19, and the gas mixture is ignited, and the heat generated by combustion gradually preheats the inner space of the reforming furnace and the refractory material. After the temperature at the tertiary air section gradually rises to 650-700°C, and the temperature in the reforming chamber 24 gradually rises to 400-470°C, the coal is injected into the furnace from the primary tuyere 3 by using the rotary feeder and the blast blowing pipe powder, and close the reheating burner 19. Under the action of the ignition burner 17, the pulverized coal sprayed into the furnace is ignited, and the temperature of each area in the reforming furnace further increases. Control the pulverized coal injection rate to 50-70kg / h, and the primary air blast volume to 380-440m 3 / h,...

Embodiment 2

[0038] High-temperature slag: blast furnace slag, temperature 1500°C; pulverized coal, ball milled through a 100-mesh standard sieve, particle size <0.15mm, ash content 14.08%. Modifier, without ball milling and sieving, particle size <1mm.

[0039] The liquefied petroleum gas and air are fed into the ignition burner 17 and the supplementary heat burner 19, and the gas mixture is ignited, and the heat generated by combustion gradually preheats the inner space of the reforming furnace and the refractory material. After the temperature at the tertiary air section gradually rises to 650-700°C, and the temperature in the reforming chamber 24 gradually rises to 400-470°C, the coal is injected into the furnace from the primary tuyere 3 by using the rotary feeder and the blast blowing pipe powder, and close the reheating burner 19. Under the action of the ignition burner 17, the pulverized coal sprayed into the furnace is ignited, and the temperature of each area in the reforming fu...

Embodiment 3

[0041] High-temperature slag: steel slag, temperature 1600°C; coal powder, ball milled through a 100-mesh standard sieve, particle size <0.15mm, ash content 14.08%. Modifier, without ball milling and sieving, particle size <1mm.

[0042] The liquefied petroleum gas and air are fed into the ignition burner 17 and the supplementary heat burner 19, and the gas mixture is ignited, and the heat generated by combustion gradually preheats the inner space of the reforming furnace and the refractory material. After the temperature at the tertiary air section gradually rises to 650-700°C, and the temperature in the reforming chamber 24 gradually rises to 400-470°C, the coal is injected into the furnace from the primary tuyere 3 by using the rotary feeder and the blast blowing pipe powder, and close the reheating burner 19. Under the action of the ignition burner 17, the pulverized coal sprayed into the furnace is ignited, and the temperature of each area in the reforming furnace furthe...

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Abstract

The invention relates to the fields of sensible-heat utilization of metallurgical high-temperature slag and efficient comprehensive utilization of resources, and provides a thermal-state slag online modification device. Through the device, high-quality modified slag can be prepared by use of the sensible heat of slag. The device comprises a top plug, a modification furnace body, a primary wind gap, a secondary wind gap, a third wind gap, a cyclone hearth, a stirring paddle, a partition wall, a slope pool bottom, a slag discharge hole, an iron liquid discharge hole, a scrap iron separation wall, a flue, a handle, a pressure relief hole, a combustion observation hole, an ignition burner, a modification chamber observation hole, a concurrent heating burner, a slag discharge chamber observation hole, a liquid flow hole, a charging hole, a sampling hole, a modification chamber, a scrap iron separation chamber, a slag discharge chamber and a cyclone furnace body. The high-quality modified slag after the treatment by the device can be directly applied to the fields such as building materials and industries; the metal iron can be recycled from the iron-containing slag. The device is simple to operate, low in operation cost and wide in application range, and has relatively good application prospect and economic value.

Description

technical field [0001] The invention relates to the fields of sensible heat utilization of metallurgical high-temperature slag and efficient comprehensive utilization of resources, and provides an online upgrading device for hot slag. Background technique [0002] In metallurgical industries such as iron and steel, hundreds of millions of tons of liquid metallurgical slag need to be discharged every year, such as blast furnace slag, steel slag, nickel-iron slag, stainless steel slag, etc. These metallurgical slags not only contain many useful inorganic components, such as CaO, SiO 2 、Al 2 o 3 , MgO, etc., and also contains residual metal elements that can be extracted and recovered, such as Fe, Mn, Cr, Ni, etc. The slag discharge temperature is 1200-1650°C, the enthalpy value is 1.6-1.7GJ / t, and the calorific value per ton of slag is equivalent to 50-60kg standard coal, which has high waste heat resources. With the excessive production capacity of the metallurgical indus...

Claims

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Application Information

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IPC IPC(8): C21B3/06
CPCC21B3/06Y02P10/20Y02W30/50
Inventor 苍大强李宇代文彬赵贵州
Owner 京津冀钢铁联盟(迁安)协同创新研究院有限公司
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