Method and equipment for continuous smelting of lead sulphide concentrate

Abstract

A lead sulfide ore concentrate continuous smelting method and equipment thereof are provided. The invention relates to a pyrometallurgical process of lead sulfide ore concentrate and the equipment adopted for realizing the process. In the device, a partition wall is arranged in the space above the liquid slag layer of the molten pool of the furnace body, which separates the device into three regions of an oxidation region, a reduction region and a fuming region that are not communicated. The top of every region is equipped with a flue gas outlet and is respectively equipped with a spray gun. A material smelting inlet is arranged on the top part of the oxidation region. A siphon discharging outlet is arranged on a crude lead layer on the bottom of the furnace body. A slag discharging outlet is arranged on the liquid slag layer of the fuming region. The smelting materials are continuously fed in the furnace from the top of the oxidation region. The liquid metal lead is continuously discharged out of the furnace from the siphon discharging outlet. SO2 obtained in the oxidation area is used for preparing sulfate acid. Valuable metal smoke dust such as high zinc that is obtained in the fuming region is reused. The invention has the advantages of short process line, fully utilization of slag heat, obvious energy saving effect, less investment in the metallurgical furnace equipment, low activity-based cost, small concentration fluctuation of SO2, cheap reducing agent and wide resources.

Description

technical field

[0001] The invention relates to non-ferrous metal metallurgical technology, in particular to the pyrometallurgy of lead sulfide concentrate and the special equipment used to realize the process. Background technique

[0002] Lead smelting methods can be summarized into two categories: traditional lead smelting method and direct lead smelting method. The traditional lead smelting method is the sintering machine-blast furnace smelting method; the direct lead smelting method is to cancel the sintering process of the lead sulfide concentrate, and the raw concentrate is directly smelted in the furnace. For many years, the traditional method has been the main production method of lead. However, with the continuous improvement of human awareness and requirements for environmental protection and energy conservation, the shortcomings of the traditional lead smelting method have become increasingly prominent. Many lead smelters in the world have gradually adopted direc...

Examples

Embodiment

[0019] Referring to Fig. 1, in the liquid slag layer 6 of the molten pool of this lead sulfide concentrate continuous smelting furnace, partition walls 8 and 11 are arranged above the smelting space, and the part and the upper space of the liquid slag layer 6 are separated into mutually disconnected oxidation zones. Area 5, reduction area 9, and fuming area 14 are three areas, and the top of each area has its own flue gas outlet, that is, flue gas outlet 1 in the oxidation area, flue gas outlet 15 in the fuming area, flue gas outlet 17 in the reduction area, Each is equipped with spray guns 2, 16 and 18, the smelting material inlet 3 is set at the top of the oxidation zone 5, a siphon discharge port 10 is provided at the crude lead layer 7 at the bottom of the furnace body, and the slag discharge port 13 is provided at the fuming zone 14 6 places of the liquid slag layer. The fuming zone 14 at the bottom of the furnace body of the present invention is provided with a slope, so...

technical field

[0001] The invention relates to non-ferrous metal metallurgical technology, in particular to the pyrometallurgy of lead sulfide concentrate and the special equipment used to realize the process. Background technique

[0002] Lead smelting methods can be summarized into two categories: traditional lead smelting method and direct lead smelting method. The traditional lead smelting method is the sintering machine-blast furnace smelting method; the direct lead smelting method is to cancel the sintering process of the lead sulfide concentrate, and the raw concentrate is directly smelted in the furnace. For many years, the traditional method has been the main production method of lead. However, with the continuous improvement of human awareness and requirements for environmental protection and energy conservation, the shortcomings of the traditional lead smelting method have become increasingly prominent. Many lead smelters in the world have gradually adopted direc...

Examples

Embodiment

[0019] Referring to Fig. 1, in the liquid slag layer 6 of the molten pool of this lead sulfide concentrate continuous smelting furnace, partition walls 8 and 11 are arranged above the smelting space, and the part and the upper space of the liquid slag layer 6 are separated into mutually disconnected oxidation zones. Area 5, reduction area 9, and fuming area 14 are three areas, and the top of each area has its own flue gas outlet, that is, flue gas outlet 1 in the oxidation area, flue gas outlet 15 in the fuming area, flue gas outlet 17 in the reduction area, Each is equipped with spray guns 2, 16 and 18, the smelting material inlet 3 is set at the top of the oxidation zone 5, a siphon discharge port 10 is provided at the crude lead layer 7 at the bottom of the furnace body, and the slag discharge port 13 is provided at the fuming zone 14 6 places of the liquid slag layer. The fuming zone 14 at the bottom of the furnace body of the present invention is provided with a slope, so...

Images