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A method for combined treatment of zinc-containing materials by side-blowing material-fume blowing

A technology of joint processing and mixing materials, which is applied in the field of metallurgy to achieve the effect of reducing costs

Active Publication Date: 2020-02-21
YUNNAN CHIHONG ZINC & GERMANIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent CN 201510188785.4 "A method of treating zinc hydrosmelting slag with hot slag side-blown reduction furnace" is used to treat lead-rich slag and zinc hydrosmelting slag, and is not suitable for processing all zinc-containing materials; this process is a reduction process and product crude lead, not oxidation process and product zinc oxide fume

Method used

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  • A method for combined treatment of zinc-containing materials by side-blowing material-fume blowing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The bed area is 15m 2 side-blown furnace, first lead-zinc symbiotic ore (Pb: 3%, Zn: 15%, S: 3%, F: 0.06%, Cl: 0.01%, As: 0.1%) and zinc leaching slag (Pb: 5 %, Zn: 16%, S: 6%, F: 0.03%, Cl: 0.03%, As: 0.2%), according to the ratio of 1:5 to form the mixed material, according to 400t / d into the side blowing furnace, evenly added within 1h Mixed ingredients. Inject oxygen-enriched air, natural gas or pulverized coal from the side-blowing lance, the volume ratio of oxygen-enriched air is 40%, the temperature is 1250°C, the excess air coefficient is 0.9, and the side-blown slag (Pb: 1%, Zn: 15%, S: 0.7%, F: 0.02%, Cl: 0.01%, As: 0.05%), the slagging time is 15min, and it is directly put into the fuming furnace through the chute;

[0025] After the flue gas is cooled by the waste heat boiler, air cooler, and bag filter, it produces zinc oxide dust with high F, Cl, and As (Pb: 30%, Zn: 25%, S: 2%, F: 0.08% , Cl: 0.03%, As: 0.4%), after the flue gas with 1% sulfur content ...

Embodiment 2

[0029] The bed area is 15m 2 side-blown furnace, first lead-zinc symbiotic ore (Pb: 4.5%, Zn: 17%, S: 4%, F: 0.09%, Cl: 0.03%, As: 0.3%) and zinc leaching slag (Pb: 7 %, Zn: 18%, S: 8%, F: 0.06%, Cl: 0.06%, As: 0.4%), according to the ratio of 1:1 to form the mixed material, according to 600t / d into the side blowing furnace, evenly added within 2h Mixed ingredients. Inject oxygen-enriched air, natural gas or pulverized coal from the side-blowing lance, the volume ratio of oxygen-enriched air to oxygen is 50%, the temperature is 1300°C, the excess air coefficient is 1.0, and the side-blown slag (Pb:3%, Zn: 17%, S: 0.9%, F: 0.03%, Cl: 0.02%, As: 0.07%), the slag discharge time is 20 minutes, and it is directly put into the fuming furnace through the chute;

[0030] After the flue gas is cooled by the waste heat boiler, air cooler, and bag filter, it produces zinc oxide dust with high F, Cl, and As (Pb: 35%, Zn: 30%, S: 3%, F: 0.11% , Cl: 0.05%, As: 0.6%), after desulfurizatio...

Embodiment 3

[0034] The bed area is 15m 2side-blown furnace, first lead-zinc symbiotic ore (Pb: 6%, Zn: 19%, S: 6%, F: 0.12%, Cl: 0.05%, As: 0.5%) and zinc leaching slag (Pb: 9 %, Zn: 20%, S: 10%, F: 0.09%, Cl: 0.09%, As: 0.6%), according to the ratio of 5:1 to form the mixed material, according to 800t / d into the side blowing furnace, evenly added within 3h Mixed ingredients. Inject oxygen-enriched air, natural gas or pulverized coal from the side-blowing lance, the volume ratio of oxygen-enriched air to oxygen is 60%, the temperature is 1350°C, the excess air coefficient is 1.1, and the side-blown slag (Pb:5%, Zn: 19%, S: 1.1%, F: 0.04%, Cl: 0.03%, As: 0.09%), the slag discharge time is 30 minutes, and it is directly put into the fuming furnace through the chute;

[0035] After the flue gas is cooled by the waste heat boiler, air cooler, and bag filter, it produces zinc oxide dust with high F, Cl, and As (Pb: 40%, Zn: 35%, S: 4%, F: 0.14% , Cl: 0.07%, As: 0.8%), after the flue gas wit...

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Abstract

The invention discloses a method for treating zinc-containing materials by combining side blowing material melting-fuming blowing. The method comprises the following steps: preparing the zinc-containing materials including lead-zinc paragenous minerals, zinc leaching residues and the like into a mixed material according to any ratio; adding the mixed material into a side blowing furnace and carrying out material melting; treating flue gas of the side blowing furnace to obtain zinc oxide smoke dust and flue gas, which have high F, Cl and As content; after desulfurizing the flue gas to reach standards, discharging the flue gas; directly putting furnace slag into a fuming furnace and carrying out blowing to obtain the furnace slag, wherein the obtained furnace slag can be directly sold afterbeing subjected to water quenching treatment; treating the flue gas of the fuming furnace to obtain zinc oxide smoke dust and flue gas, which have high F, Cl and As content, and directly discharging the flue gas after the flue gas reaches the standards. According to the method disclosed by the invention, continuous oxidization of the zinc-containing materials is realized; the bed capacity is highand low-concentration SO2 in the flue gas is stable; meanwhile, the zinc oxide smoke dust which has the high F, Cl and As content and the zinc oxide smoke dust which has the low F, Cl and As content are separated, so that zinc oxide is easy to treat separately in the next step and the cost can be reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for jointly treating zinc-containing materials by side-blowing chemical materials and fuming blowing. Background technique [0002] For zinc-containing materials such as lead-zinc symbiotic ore and zinc leaching slag, the treatment methods mainly include rotary kiln process, top blowing process and fuming process. The rotary kiln process is a commonly used treatment process at present, with mature technology and simple operation, but the labor intensity of kiln cleaning is relatively high, the operation rate is low, the recovery rate of precious metals is low, the processing capacity is low, and the energy consumption and production cost are high. The top-blown furnace process uses oxygen-enriched smelting to process zinc-containing materials, and separate furnaces are operated. The coal rate is high, the bed capacity is high, and the recovery rate of prec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/22C22B19/34
CPCC22B1/22C22B19/34
Inventor 马雁鸿吴红林罗永光蒋荣生俞兵王勇马绍斌代龙果
Owner YUNNAN CHIHONG ZINC & GERMANIUM
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