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Metallurgical zinc-containing dust removal treatment and utilization device and method

A dust collector and zinc ash technology, applied in the direction of improving process efficiency, can solve the problems of low dezincification rate, high treatment cost, and inability to handle dust removal ash, etc., to improve the quality of molten iron, make full use of waste heat, and reduce heat loss. Effect

Pending Publication Date: 2019-02-05
山西于斯为盛环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dezincification rate of the traditional rotary kiln technology is low, about 1% of the zinc cannot be removed, and the dust removal ash with a zinc content of less than 4% cannot be treated; the investment of the rotary hearth furnace technology is too large, and the treatment cost is high; the small blast furnace belongs to the national decree obsolete technology

Method used

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  • Metallurgical zinc-containing dust removal treatment and utilization device and method
  • Metallurgical zinc-containing dust removal treatment and utilization device and method
  • Metallurgical zinc-containing dust removal treatment and utilization device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The zinc-containing dust ash with 4-6% zinc content is pre-batched in the zinc-containing dust ash pretreatment bin 1, and then granulated with a disc granulator 2 to a particle size of 3-5 mm, and then sent to a dryer 3 for drying. The dried granules are fed into the rotary furnace 5 for reduction and oxidation through the feeder 4 for the first dezincification. The operating temperature of the rotary furnace is 1100-1150°C; the volatilized dust containing more than 55% zinc comes out from the furnace tail and passes through the first dezincification. The dust collection device 6 is collected into the next section for reuse; the high-temperature red slag with a zinc content of less than 1% in the furnace head and a temperature of 800-1000 ° C is subjected to thermal screening and crushing by the red slag screener 9 and the red slag crusher 10, Broken until the particles are less than 8mm; the high-temperature particles at 600 degrees Celsius after being broken are trans...

Embodiment 2

[0056] The zinc-containing dust with 6-8% zinc content is pre-batched in the zinc-containing dust pretreatment system, and then granulated by a tooth stirring granulator, the particle size is 3-5 mm, and then it is dried in a dryer and fed through The machine puts the dried particles into the rotary furnace for reduction and oxidation for the first dezincification. The operating temperature of the rotary furnace is 1150-1200 °C; the dust containing more than 55% zinc comes out of the furnace tail and is collected by the first dust collector into the next section. Reuse; high-temperature red slag with a zinc content of less than 1% in the furnace head and a temperature of 800-1000 °C is subjected to hot screening and crushing, and the particles are crushed to less than 8 mm; The silo is sprayed with a spray gun into the melting reduction furnace of equipment 12 to carry out the second dezincification; the temperature in the melting reduction furnace is controlled at 1400-1450 de...

Embodiment 3

[0060] The zinc-containing dust with 8-10% zinc content is pre-batched in the zinc-containing dust pretreatment bin, and then granulated by a tooth stirring granulator with a particle size of 3-5 mm, and then dried in a dryer, and fed through The machine puts the dried particles into the rotary furnace for reduction and oxidation for the first dezincification. The operating temperature of the rotary furnace is 1150-1200 °C; the dust containing more than 55% zinc comes out of the furnace tail and is collected by the first dust collector into the next section. Reuse; high-temperature red slag at 800-1000°C with a zinc content of less than 1% in the furnace head is subjected to hot screening and crushing until the particles are less than 8mm; The silo is sprayed into the melting reduction furnace with a spray gun for the second dezincification; the temperature in the melting reduction furnace is controlled at 1400-1450 degrees Celsius; at the same time, blue charcoal powder is spr...

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Abstract

The invention discloses a metallurgical zinc-containing dust removal treatment and utilization device and method. The device comprises an integrated operation complete device of which first-stage andsecond-stage fire dezincification devices, namely, a first zinc enrichment device and a second zinc enrichment device are connected. The first-stage dezincification device, namely, the second zinc enrichment device comprises a zinc-containing dust pretreatment bin, a pelletizer, a drying machine, a feeding machine, a rotary furnace and a first dust collection device which are connected in sequence. The second-stage fire dezincification devices, namely, the first zinc enrichment device comprises a red slag screening device, a red slag crushing machine, a low-zinc dust removal preheating furnace, a smelting reduction furnace, a second dust collection device and a molten iron desulfurization tank. According to the metallurgical zinc-containing dust removal treatment and utilization device, onthe basis of a traditional rotary furnace and a traditional smelting reduction furnace, through an improvement on the process and the integrated and innovative technologies, the continuous two-stagedezincification and continuous twice zinc enrichment low-zinc dust removal treatment and utilization production device and method comprising the rotary furnace and the smelting reduction furnace are formed. The brand-new technological breakthrough is realized, and harmless treatment and resource utilization are achieved during metallurgical low-zinc dust removal.

Description

technical field [0001] The invention relates to a device and method for the treatment and utilization of metallurgical zinc-containing dust removal ash, belonging to the technical field of environmental protection and energy saving. Background technique [0002] Due to the use of zinc associated with iron ore and galvanized iron and steel waste, it is inevitable for zinc to enter the iron and steel production process; and because zinc is a harmful element to blast furnaces, blast furnaces in my country are becoming larger and larger and more expensive to manufacture. Today, the open-circuit removal of zinc from the steel production process is increasingly important. Various types of zinc-containing dust ash (electric furnace, converter, blast furnace) produced in China's iron and steel production process (dry dust removal is ash, wet dust removal is mud, collectively referred to as ash in the specification and claims) each year amounts to tens of millions of tons. The zinc c...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B19/30C21C7/064
CPCC21C7/064C22B7/004C22B19/30Y02P10/20
Inventor 汤彦玲骆天荣张建良张华常成明陈亮贾彬
Owner 山西于斯为盛环保科技有限公司
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