Method and device for smelting low grade zinc lead material

A low-grade, zinc-lead technology, applied in furnaces, blast furnace details, blast furnaces, etc., can solve the problems of high energy consumption, low production efficiency, and difficulty in realization of zinc oxide ore, and achieve good continuous production and high utilization rate of waste heat. , the effect of convenient operation

Inactive Publication Date: 2008-07-09
KUNMING KUNZHIJIE TRADING
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Problems solved by technology

In the fire treatment process, the rotary kiln treatment of zinc oxide ore consumes a lot of energy, and the production efficiency is low. The collected product is also zinc-lead mixed powder. The electric furnace treatment method and the Webster furnace have strict requirements on the lead content and other impurities in the raw materials. Difficult to implement in actual production
The metal bath melting reduction method is a new low-grade zinc oxide metallurgy method developed in the past 10 years. Research has also been carried out on the use of iron baths and aluminum baths to reduce and volatilize low-grade zinc oxide ores. The separation of zinc and lead has achieved good experimental results. However, due to the large amount of slag and high energy consumption, this method is limited

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  • Method and device for smelting low grade zinc lead material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Zinc oxide ore is mixed with reducing agent, additive and binder to make pellets with a diameter of 60mm; the humidity is 5%; powdered fuel is blown by hot air to carry out blast furnace reduction smelting; Added into the furnace, the height of the material column in the furnace is controlled at 3m, the angle α between the direction of spraying powdered fuel and the vertical line is 15°, the temperature of the molten pool is 1100°C, the temperature of the hot air is 450°C, and the pressure It is 20kpa; the coke rate is 18%; the quaternary alkalinity of the slag type is R=0.55. Primary hot air and powdered fuel are blown in from the bottom air nozzle 7, the reduction temperature is controlled to volatilize a large amount of lead oxide in the zinc oxide pellets, and the zinc oxide and lead oxide are quickly reduced to zinc and lead, so that the lead oxide can be as much as possible before volatilization. Reduced to metallic lead to reduce its volatilization....

Embodiment 2

[0025] Embodiment 2: Mix the dust mineral material of iron and steel plant with reducing agent additive and binding agent to make pellets with a diameter of 50 mm; the humidity is 7%; use hot air to blow powdered fuel to carry out blast furnace reduction smelting; pellets from The feeding port is added to the furnace, the height of the material column in the furnace is controlled at 3m, the angle α between the direction of the hot air spraying the powdered fuel and the vertical line is 20°, the temperature of the molten pool is 1150°C, and the temperature of the hot air is 360°C ℃, the pressure is 18kpa; the coke rate is 20%; the quaternary alkalinity of the slag type is R=0.8. Primary hot air and powdered fuel are blown in from the bottom air nozzle 7, the reduction temperature is controlled to volatilize a large amount of lead oxide in the zinc oxide pellets, and the zinc oxide and lead oxide are quickly reduced to zinc and lead, so that the lead oxide can be as much as possi...

Embodiment 3

[0030] Example 3: Mix smelting waste slag mineral materials with reducing agent additives and binders to make pellets with a diameter of 50mm; the humidity is 7%; hot air is used to blow powdered fuel to carry out blast furnace reduction smelting; Put it into the furnace, the height of the material column in the furnace is controlled at 3m, the temperature of the molten pool is 1150°C, the angle α between the direction of the hot air spraying the powdered fuel and the vertical line is 20°, and the temperature of the hot air is 460°C. The pressure is 18kpa; the coke rate is 25%; the quaternary alkalinity of the slag type is R=1.2. Primary hot air and powdered fuel are blown in from the bottom air nozzle 7, the reduction temperature is controlled to volatilize a large amount of lead oxide in the zinc oxide pellets, and the zinc oxide and lead oxide are quickly reduced to zinc and lead, so that the lead oxide can be as much as possible before volatilization. Reduced to metallic l...

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Abstract

The invention relates to a smelting process of low-grade zinc and lead material and a device, which conduct blast furnace reducing smelting through adopting hot air to blow powdered fuel, directly produce high grade zinc oxide and wet lead, wherein the content of pellet zinc in zinc and lead material is 10%-20%, the content of lead is 2%-8%, the content of sulfur is lower than 2%, moisture is 5%-15%, the height of material column in furnace is remained between 2-3m, the temperature of a molten pool is 1100 DEG C-1250 DEG C, the temperature of hot air is 350 DEG C-480 DEG C, the pressures is 15-25 KPa, the coke yield is 18%-25%, the four alkality of R=0.5-1.2. Double air inlets (3) are arranged on the upper portion and the lower portion of a furnace hearth (2), and a hot air sleeve (4) is arranged on the middle lateral portion of the blast furnace. The invention has the advantages of simple structure, stable and reliable working, excellent continuous production, convenient operation, high recovery rate of zinc and lead and low cost, which can effectively treat low grade zinc and lead material.

Description

Technical field: [0001] The invention relates to a smelting method of nonferrous metallurgy, in particular to a method and a device for directly producing zinc oxide and rough lead by smelting low-grade zinc-lead materials in a blast furnace. Background technique: [0002] The comprehensive utilization of low-grade zinc-lead resources is one of the research hotspots in metallurgical circles at home and abroad. At present, there is no technology and device for directly producing high-grade zinc oxide and crude lead when lead and zinc are separated from low-grade lead-zinc mineral materials. The treatment of dust containing iron, zinc and lead in foreign iron and steel plants has been industrialized. The representative processes are Wazels rotary kiln treatment process and INMETCO annular furnace treatment process. The main purpose is to recover iron, and the by-product obtained is lead. Secondary dust mixed with zinc. [0003] The fire treatment process of low-grade zinc ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/08C22B13/02
CPCY02P10/20
Inventor 赵倩张秀川
Owner KUNMING KUNZHIJIE TRADING
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