CN2354970Y

CN2354970Y - Apparatus for recovering zinc from dregs

Info

Publication number: CN2354970Y
Application number: CN 98207115
Authority: CN
Inventors: 金云龙; 史宝龙
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-07-28
Filing date: 1998-07-28
Publication date: 1999-12-22
Anticipated expiration: 2008-07-28

Abstract

The utility model discloses a device for recovering zinc from waste slag containing zinc, which comprises a furnace, material tanks which stand uprightly and uniformly in the furnace and a dust-removing system. The dust-removing system is composed of a main dust-absorbing pipe, a cyclone dust-removing device, a dust-absorbing pipe, a draught fan, a dust-discharging pipe and a cloth-bag recovering device which are respectively connected. The upper part of the furnace is provided with a chamber, and the lower part is provided with a furnace chamber, furnace grates, a fuel inlet, a central upper-firing port, lower-firing ports of both sides and a blanking slag channel. The upright material tanks are made of silicon carbide, the cross sections of the upright material tanks are elliptical-shaped, and the upright material tanks are composed of an upper part extending to the furnace and a lower part arranged in the furnace. The top is provided with a feeding port, and the periphery is provided with an extended liquid zinc-storing part. When the utility model uses the zinc-rich waste slag as the raw material, the zinc recovering rate is high, the operation is convenient, and the service life is long.

Description

Equipment for extracting zinc from zinc-containing waste residue

The utility model relates to a sintering and distilling device, in particular to a device for extracting zinc from zinc-containing waste residue.

Most of the current industrial waste residues are abandoned, causing remarkable waste and polluting the environment. For several domestic container manufacturers, when the zinc-rich primer is sprayed on the containers, a large amount of waste paint residues fall on the ground. The main components of the waste paint slag are simple substance zinc, micro zinc oxide and high content of carbon, wherein the zinc content can reach about 60-70%. All industrial waste residues are discarded in the past, more than five thousand tons of industrial waste residues can be obtained every year, and the method is astonishing in waste and polluting the environment.

At present, a small number of people use an earth method, namely a horizontal tank furnace to refine zinc in waste paint slag, the recovery rate of the zinc can only reach about 65%, so that zinc resources are not fully recycled, and the problem of environmental pollution is not solved, therefore, the earth method zinc smelting is forbidden by the national plain text regulation. Therefore, no equipment for extracting zinc exists so far, which can fully recycle the zinc in the industrial waste residue and meet the national environmental protection requirement.

An object of the utility model is to solve the above-mentioned problem among the prior art, provide an equipment that can follow high efficiency zinc extraction in the zinciferous waste residue, and this equipment structure is simple, and the operation side makes long service life.

The utility model discloses a zinc-extracting device, which comprises a furnace, a charging bucket and a dust-removing system, wherein the furnace is divided into an upper part and a lower part, the upper part is provided with a cavity for placing the charging bucket, and the lower part is provided with a furnace bore, a furnace bar, a fuel inlet, a central upper fire hole, two side lower fire holes and a discharging slag channel; the charging bucket is a plurality of vertical buckets made of silicon carbide and having oval cross sections, the vertical buckets are uniformly erected in a cavity at the upper part of the furnace, each charging bucket is composed of an upper part extending out of the furnace and a lower part arranged in the furnace, the top of the upper part is a cone with a feeding port, the peripheral surface of the lower part of the cone is provided with an outward extending zinc liquid storage part communicated with the cone, and the bottom of the lower part of the cone is communicated with a blanking slag channel at the lower part of the furnace; the dust removal system comprises a main dust collection pipe, a cyclone dust collector, a dust collection pipe, an induced draft fan, a dust discharge pipe and a cloth bag recoverer which are sequentially connected, wherein a dust collection cap is arranged on the main dust collection pipe and is arranged above the part, extending outwards, of the zinc liquid storage tank, a dust discharge port is formed in the side face of the part, extending outwards, of the zinc liquid storage tank, and an overflow port is formed in the lower portion of the part.

The utility model discloses an equipment for extracting zinc, wherein the material jar is 22, and they are arranged into four lines, and two lines respectively are 6 material jars of equidistance in the middle, lean on two lines respectively for 5 material jars of equidistance outside, and arrange in the middle between two lines of equidistance, the dust absorption cap also is 22.

The utility model discloses the advantage of the equipment of zinc extraction lies in:

1. the equipment adopts the vertical tank which is uniformly erected in the furnace and made of silicon carbide and has an oval cross section, the heat conducting property is good, the heating is uniform, the vertical tank cannot be cracked when the temperature changes rapidly, and the service life of the vertical tank is prolonged to 16 months from 1 month in the prior art;

2. the zinc refining of the equipment is carried out under the synchronization of sintering and distillation, and the raw material ball almost has no oxidation loss, so the recovery rate of zinc in the industrial zinc-containing waste paint slag can reach more than 95 percent.

3. The equipment has a more perfect dust removal system, thereby meeting the national environmental protection requirements.

The following describes in detail a preferred embodiment of the apparatus of the present invention with reference to the accompanying drawings.

FIG. 1 is a front view of a preferred embodiment of the zinc refining apparatus of the present invention.

Fig. 2 is a top view of the embodiment shown in fig. 1.

Fig. 3 is a cross-sectional view at fig. 2A-a.

Fig. 4 is an enlarged sectional view of the 1-bucket portion in the embodiment shown in fig. 1.

Referring to fig. 1 to 4, the zinc refining apparatus of the present invention comprises a furnace 1, 22 charging pots 2 uniformly erected in the chamber of the furnace 1, and a dust removing system consisting of a main dust suction pipe 12, a cyclone 13, a dust suction pipe 14, an induced draft fan 15, a dust exhaust pipe 16 and a cloth bag recoverer 17 which are connected in sequence. The furnace 1 is divided into an upper part and a lower part, wherein the upper part is a chamber, and the lower part is provided with a hearth 3, a fire bar 4, a fuel inlet 5, a central upper fire hole 6, two side lower fire holes 7 and a discharging slag channel 8. The 22 vertical charging pots 2 are made of silicon carbide material, have oval cross sections and are respectively composed of an upper part extending out of the furnace and a lower part arranged in the furnace. The top of the upper part of the device is provided with a cone 10 with a feeding port 9, and the peripheral surface of the lower part of the cone is provided with an outward extending zinc liquid storage part 11 communicated with the cone; the bottom of the tank at the lower part is communicated with a blanking slag channel 8 at the lower part of the furnace 1. The main dust suction pipe 12 is provided with 22 dust suction caps 18 which are arranged above the zinc liquid storage part 11 extending out of 22 charging pots 2. The side surface of the extended zinc liquid storage part 11 is provided with a dust discharge port 19, and the lower part is provided with an overflow port 20. And discharging waste slag from a slag removing port of the blanking slag channel 8 every 2 hours, and simultaneously filling dried raw material balls from a feeding port 9 until the furnace 1 is overhauled.

When the device of the utility model is used, firstly, 22 verticalcharging pots 2 in the furnace 1 are filled with the dried raw material balls containing zinc, such as zinc-rich primer waste balls, then the fire coal is filled from the fuel inlet 5 at the lower part of the furnace 1, the furnace is gradually heated to 1300 ℃, and the raw material balls in the lower part of the charging pots 2 are subjected to oxidation-reduction reaction (the utility model discloses a ) While the raw material pellets in the upper part of the charging bucket 2 are gasified, liquefied, sintered and preheated from bottom to top. Wherein, the gasification means that solid zinc in the raw material ball is converted into zinc gas at 1000 ℃; the liquefaction means that the zinc gas enters the overhanging zinc liquid storage part 11 and is naturally cooled to 800-500 ℃ to become zinc liquid; sintering refers to sintering the raw material balls by using the waste heat of 700 ℃ in a gasification zone; preheating means preheating the raw material balls by using the waste heat of 300-700 ℃ in a sintering zone. The zinc liquid flows out from the overflow port 20 and is cast into a zinc ingot.

The micro zinc oxide, dust and carbon dioxide which are removed in the using process of the equipment are discharged and recovered through a dust removing system of the equipment, namely a main dust pipe 12, a cyclone dust collector 13, a dust collecting pipe 14, an induced draft fan 15, a dust discharging pipe 16, a cloth bag recoverer 17 and a suction hood 18 on the main dust collecting pipe which are sequentially connected.

If four furnaces are built, 160 kg of zinc ingots can be produced by using 1 vertical charging bucket for 24 hours to extract zinc liquid, 14 tons of zinc ingots can be produced by using the four furnaces every day, and 4200 tons of zinc ingots No. 1 can be produced by calculating 300 working days in the whole year. The equipment does not compete with large-scale enterprises in China for resources, can change waste materials into zinc with industrial utilization value, and does not pollute the environment.

Claims

1. The equipment for extracting zinc from the zinc-containing waste residue comprises a furnace (1) and a charging bucket (2), and is characterized in that: the furnace is characterized by also comprising a dust removal system, wherein the furnace (1) is divided into an upper part and a lower part, the upper part is provided with a cavity for placing the charging bucket (2), and the lower part is provided with a furnace bore (3), a grate bar (4), a fuel inlet (5), a central upper fire hole (6), two side lower fire holes (7) and a discharging slag channel (8); the charging pots (2) are a plurality of vertical pots which are made of silicon carbide and have oval cross sections, the vertical pots are uniformly erected in a cavity at the upper part of the furnace (1), each charging pot (2) consists of an upper part extending out of the furnace and a lower part arranged in the furnace, the top of the upper part is a cone (10) with a feeding port (9), the peripheral surface of the lower part of the cone is provided with an outward extending zinc liquid storage part (11) communicated with the cone, and the bottom of the lower part of the charging pot is communicated with a blanking slag channel (8) at the lower part of the furnace (1); the dust removal system comprises a main dust collection pipe (12), a cyclone dust collector (13), a dust collection pipe (14), an induced draft fan (15), a dust discharge pipe (16) and a cloth bag recoverer (17) which are sequentially connected, wherein a dust collection cap (18) is arranged above an overhanging zinc liquid storage part (11) of the charging bucket (2) on the main dust collection pipe (12), a dust discharge port (19) is formed in the side surface of the overhanging zinc liquid storage part (11), and an overflow port (20) is formed in the lower part of the overhanging zinc liquid storage part.

2. An apparatus for extracting zinc from zinc containing slag according to claim 1, wherein: the material jar (2) are 22, and they are arranged into four lines, and two lines respectively are 6 material jars of equidistance in the middle, lean on two outer lines respectively to be 5 material jars of equidistance, and arrange in the equidistance of two lines in the middle in, dust absorption cap (18) also are 22.