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Method for simultaneously smelting zinc dipping slag and zinc kiln slag by using blast furnace

A zinc leaching slag and blast furnace technology, which is applied in the field of extracting valuable metal elements in zinc kiln slag and zinc leaching slag, can solve the problems of sulfur dioxide deterioration treatment environment, unsatisfactory zinc volatilization index, sulfur dioxide pollution environment and other problems, and achieve simple and practical equipment , Good separation effect, environment-friendly effect

Active Publication Date: 2011-04-20
云南云铜锌业股份有限公司
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Problems solved by technology

For the recycling of valuable elements in zinc kiln slag, known literature 2 (Zhou Hongwu, Xu Ziping. Recovering silver from zinc kiln slag by molten pool smelting method [J]. Nonferrous Metals (Smelting Part), 1991 (6): 18 ~20) Recovering valuable elements in zinc kiln slag by melting pool smelting method is only carried out to small scale experiment and the recovery rate of scattered metal is about 40%, and there are follow-up treatment and environmental pollution problems of sulfur dioxide
The known document 3 (Li Changfu. Experimental Research on Smelting Process of Fankou Kiln Slag. Mining and Metallurgy. 2002, 11(3): 56-59) treats zinc kiln slag with pyrite vulcanization technology, which can recover zinc kiln slag Valuable elements in the process, but the process has only been studied in the laboratory and the sulfur dioxide produced in the process will deteriorate the treatment environment
Publicly known literature 4 (Liu Zhihong, Wen Jian, Li Yuhu, etc. Research on Comprehensive Recovery of Valuable Metals from Fankou Kiln Slag Treated by Fusion Chlorination and Volatilization Process [J]. Nonferrous Metals (Smelting Section), 2005(3): 14-15 ) using fusion chlorination method to recover valuable elements in zinc kiln slag from flue dust. The volatilization rate of zinc and copper is low, and the volatilization index of zinc is not ideal. problems; therefore, the efficient separation of valuable elements, environmental friendliness, short process flow and good economic benefits for the treatment of zinc kiln slag and zinc leaching slag have practical significance

Method used

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  • Method for simultaneously smelting zinc dipping slag and zinc kiln slag by using blast furnace

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Experimental program
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Effect test

Embodiment 1

[0026] Get zinc dipping slag (main content is: Zn is 5-20%; Pb is 3.2-3.5%; Cd is 0.2-0.3%; Cu is 1.0%; Fe is 1.8-5%; As is 0.8-1.0%; Sb 0.3-0.3%; Ag is 0.022-0.03%; In is 0.05-0.06%; S is 6-7%) 400kg, the initial particle size -200 mesh accounts for 75%, is mixed with 10% water, and then in the disc system The agglomeration is carried out in the agglomeration machine to obtain the zinc leaching slag agglomerate, which is naturally dried in a ventilated place for 10 hours and then enters the batching process section. Take zinc kiln slag (the main content is: CuO is 1.12%, TFe is 31.36%, Zn is 8.15%, Ag is 119.3g / t, In is 198.4g / t) material 46%, the initial particle size of zinc kiln slag requires + 10 mesh accounts for 75%; add 15% coke with a fixed carbon content of 74%, 5% SiO 2 The content is more than 98% of silica and 34% of zinc leaching slag. The four materials are mixed by a circular mixer and then melted in a blast furnace. The process conditions controlled by the b...

Embodiment 2

[0028] Get zinc dipping slag (main content is: Zn is 5-20%; Pb is 3.2-3.5%; Cd is 0.2-0.3%; Cu is 1.0%; Fe is 1.8-5%; As is 0.8-1.0%; Sb 0.3-0.3%; Ag is 0.022-0.03%; In is 0.05-0.06%; S is 6-7%) 400kg, the initial particle size -200 mesh accounts for 75%, is mixed with 15% of water, and then in the disc system The agglomeration is carried out in the agglomeration machine to obtain the zinc leaching slag agglomerate, which is naturally dried in a ventilated place for 14 hours and then enters the batching process section. Take zinc kiln slag (main content: CuO is 1.12%, TFe is 31.36%, Zn is 8.15%, Ag is 119.3g / t, In is 198.4g / t) material 53%, the initial particle size of zinc kiln slag requires + 10 mesh accounts for 85%; add 15% coke with a fixed carbon content of 74%, 4% SiO 2 The content is more than 98% of silica and 28% of zinc leaching slag. The four materials are mixed by a circular mixer and then melted in a blast furnace. The process conditions controlled by the blast...

Embodiment 3

[0030] Get zinc dipping slag (main content is: Zn is 5-20%; Pb is 3.2-3.5%; Cd is 0.2-0.3%; Cu is 1.0%; Fe is 1.8-5%; As is 0.8-1.0%; Sb Ag is 0.3-0.3%; Ag is 0.022-0.03%; In is 0.05-0.06%; S is 6-7%) 400kg, the initial particle size -200 mesh accounts for 75%, is mixed with 20% of water, and then in the disc system The agglomeration is carried out in the agglomeration machine to obtain the zinc leaching slag agglomerate, which is naturally dried in a ventilated place for 16 hours and then enters the batching process section. Take zinc kiln slag (main content: CuO is 1.12%, TFe is 31.36%, Zn is 8.15%, Ag is 119.3g / t, In is 198.4g / t) material 60%, the initial particle size of zinc kiln slag requires + 10 mesh accounts for 95%; add 15% coke with a fixed carbon content of 74%, 2% SiO 2 The content is more than 98% of silica and 23% of zinc leaching slag. The four materials are mixed by a circular mixer and then melted in a blast furnace. The process conditions controlled by the...

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Abstract

The invention relates to a method for simultaneously smelting zinc dipping slag and zinc kiln slag by using a blast furnace, which belongs to the technical field of metal smelting. The method comprises the following steps: a, taking a certain amount of zinc dipping slag, adding 10 to 20 percent of water into the zinc dipping slag to form a zinc dipping slag briquette, and naturally drying the zinc dipping slag briquette for 10 to 16 hours at a ventilated place for later use; b, taking 46 to 60 percent of zinc kiln slag of which over 75 percent meets the initial granularity requirement of 10 meshes, adding 22 to 34 percent of zinc dipping slag briquette, 15 percent of coke and 2 to 5 percent of silica into the zinc kiln slag, mixing the four materials and smelting the mixture; c, smelting the mixture in the blast furnace, wherein the smelting temperature is between 600 and 1,350 DEG C, the smelting period is 40 to 80 minutes and the tuyere ratio distribution range of the blast furnace is 4.5 to 6.1 percent; and d, obtaining a copper matte phase, a soot phase and a slag phase after the mixture is smelted in the blast furnace. Reclaimed copper, gold and silver phases in the copper matte phase are directly used as raw materials for smelting copper; reclaimed zinc and lead valuable elements in the soot phase are directly used as raw materials for smelting zinc and lead; and the slag phase is directly used as a raw material for producing cement. The method has the advantages of simultaneously obtaining the copper matte, the slag phase and the soot serving as primary products through one process, realizing efficient separation and zero emission of the valuable elements, along with environment protection.

Description

Technical field: [0001] The present invention relates to a method for extracting valuable metal elements in zinc kiln slag and zinc leaching slag, specifically, a method of jointly melting zinc kiln slag and zinc leaching slag by blast furnace to obtain matte phase, soot phase and slag phase . It belongs to the technical field of metal smelting. Background technique: [0002] Zinc leaching slag is a solid waste slag produced in the process of hydrometallurgy, which contains valuable metal elements such as zinc, lead, copper, iron, gallium, germanium, indium and silver, and has great comprehensive utilization value. Zinc kiln slag is the waste slag after zinc, lead and other metals are extracted under high temperature in the rotary kiln after adding 40-50% coke powder to the leaching slag of zinc hydrometallurgy. Under normal circumstances, many valuable metals such as iron, zinc, copper, lead, silver, and gold will be retained, which is a comprehensive recycling raw materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B19/30C22B11/02C22B15/02
CPCY02P10/20
Inventor 牛皓张放戴兴征杨美彦黄江张会林杨建军吕萍张国莹王林曾鹏黄孟阳
Owner 云南云铜锌业股份有限公司
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