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A method for starting a fuming furnace with a waste heat boiler

A waste heat boiler and smoke furnace technology, which is applied in the metallurgical field, can solve the problems that the waste heat boiler cannot withstand and the temperature rise cannot exceed 40°C, etc., and achieves the effect of a safe and easy method of opening the furnace, realizing safe operation, and ensuring safe operation.

Active Publication Date: 2018-05-18
YUNNAN CHIHONG ZINC & GERMANIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional heating method of fuming furnace is to use reduction furnace or electric furnace hot slag (t ≥ 1100 ℃) to directly feed into the fuming furnace through the hot feeding port. When the third tuyere is slightly red, first add a small amount of pulverized coal to ignite. Within 10 to 20 minutes, it can rise from room temperature to about 1150°C. Such a temperature gradient cannot be tolerated by the waste heat boiler. The temperature rise of the waste heat boiler water cannot exceed 40°C per hour. For the safe operation of the fuming furnace, other temperature rises must be considered Way

Method used

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  • A method for starting a fuming furnace with a waste heat boiler

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Comparison scheme
Effect test

Embodiment 1

[0029] First, connect the external high-pressure steam pipe to the waste heat boiler drum of the fuming furnace, start the forced circulation pump of the fuming furnace, pay attention to the change of the water level of the drum during the heating process, and adjust the water level regulating valve to maintain the normal water level of the waste heat boiler drum of the fuming furnace .

[0030] Then, open the external high-pressure steam pipe to heat the steam pipe, increase the temperature at 10°C / h for 11 hours, keep the temperature of the furnace water at 140°C, and raise the pressure to 0.36MPa, open the main steam valve to 3%, and warm the steam pipe .

[0031] Add lead-zinc symbiotic ore (components Pb: 2%, Zn: 25%, S: 0.3%, SiO 2 : 10%, CaO: 10%), zinc wet slag (composition Pb: 4%, Zn: 16%, S: 8%, SiO 2 : 3%, CaO: 1%) and other zinc-containing materials 5t spread furnace bottom. Put 2 tons of firewood into the fuming furnace, ignite with cotton yarn and diesel oil, ...

Embodiment 2

[0033] First, connect the external high-pressure steam pipe to the waste heat boiler drum of the fuming furnace, start the forced circulation pump of the fuming furnace, pay attention to the change of the water level of the drum during the heating process, and adjust the water level regulating valve to maintain the normal water level of the waste heat boiler drum of the fuming furnace .

[0034] Then, open the external high-pressure steam pipe to heat the steam pipe, raise the temperature at 20°C / h for 6 hours, keep the furnace water temperature at 150°C, and raise the pressure to 0.48MPa, open the main steam valve to 4%, and warm the steam pipe .

[0035] Add lead-zinc symbiotic ore (components Pb: 3%, Zn: 18%, S: 0.7%, SiO 2 : 12%, CaO: 12%), zinc wet slag (composition Pb: 6%, Zn: 20%, S: 6%, SiO 2 : 5%, CaO: 1.5%) and other zinc-containing materials 15t spread furnace bottom. Put 3 tons of firewood into the fuming furnace, ignite with cotton yarn and diesel oil, raise th...

Embodiment 3

[0037] First, connect the external high-pressure steam pipe to the waste heat boiler drum of the fuming furnace, start the forced circulation pump of the fuming furnace, pay attention to the change of the water level of the drum during the heating process, and adjust the water level regulating valve to maintain the normal water level of the waste heat boiler drum of the fuming furnace .

[0038] Then, open the external high-pressure steam pipe to heat the steam pipe, increase the temperature at 30°C / h for 4.5h, keep the temperature of the furnace water at 160°C, and raise the pressure to 0.62MPa, open the main steam valve to 5% to warm the steam pipe Tube.

[0039] Add lead-zinc symbiotic ore (components Pb: 5%, Zn: 11%, S: 1%, SiO2) from the cold material port of the fuming furnace 2 : 13%, CaO: 14%), zinc wet slag (composition Pb: 8%, Zn: 22%, S: 4%, SiO 2 : 8%, CaO: 2%) and other zinc-containing materials 20t spread furnace bottom. Put 5 tons of firewood into the fuming ...

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Abstract

The invention discloses a furnace opening method of a fuming furnace of a boiler with afterheat. The method heats water of the boiler with the afterheat of the fuming furnace through high-pressure steam, then, uses pulverized coals for heating, and finally, directly adds hot melting slag to realize safe opening of the fuming furnace of the boiler with the afterheat. The furnace opening method is safe and feasible, effectively realizes safe opening of the fuming furnace of the boiler with the afterheat, and meanwhile, realizes safe operation of the boiler with the afterheat; and the method adopts an external high-pressure steam pipe to add in a pan cylinder of the boiler with the afterheat of the fuming furnace, is short in time and low in energy consumption compared with firewood and coke heating, and meanwhile, can guarantee safe operation of the boiler with the afterheat of the fuming furnace.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for starting a fuming furnace with a waste heat boiler. Background technique [0002] For zinc-containing materials such as lead-zinc symbiotic ore and zinc wet slag, the subsequent fire treatment methods mainly include rotary kiln method and fuming furnace method. The use of rotary kiln treatment has problems such as low bed capacity, high energy consumption, large environmental pollution, and difficult recovery of waste heat. At present, the technology of volatilizing lead and zinc metals by fuming furnace method has gradually become the mainstream technology. In recent years, fuming furnaces have become increasingly mature in metallurgical fields such as lead, copper, tin, nickel and steel. The method of making molten pool with all cold material in side blowing furnace has been reported. There is no report on the start-up method of the fuming furnace...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B5/16C22B7/00C22B19/04C22B19/30C22B13/02
CPCC22B5/16C22B7/001C22B13/02C22B13/025C22B19/04C22B19/30Y02P10/20
Inventor 贾著红吴红林马雁鸿蒋荣生俞兵王勇马绍斌刘俊
Owner YUNNAN CHIHONG ZINC & GERMANIUM