CN215887184U - Equipment for recovering zinc in tin smelting smoke dust - Google Patents
Equipment for recovering zinc in tin smelting smoke dust Download PDFInfo
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- CN215887184U CN215887184U CN202121935930.8U CN202121935930U CN215887184U CN 215887184 U CN215887184 U CN 215887184U CN 202121935930 U CN202121935930 U CN 202121935930U CN 215887184 U CN215887184 U CN 215887184U
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Abstract
The utility model discloses a device for recovering zinc in tin smelting smoke dust, which comprises: the device comprises a leaching tank, a corrosion-resistant pump for pumping leaching slurry, a plate-and-frame filter press for leaching slurry solid separation, a slag washing tank, a corrosion-resistant pump for pumping washing slurry, a plate-and-frame filter press for washing slurry solid separation, a replacement tank, a plate-and-frame filter press for separating replacement slag, a plate-and-frame filter press for pumping a mixture of replaced slag and liquid, an extraction and back-extraction tank and an electrolytic tank for recovering zinc by electrodeposition. The utility model realizes the recovery of valuable metal zinc and the purpose of recovering zinc from tin smelting smoke while removing harmful element zinc from the tin smelting smoke.
Description
Technical Field
The utility model relates to the technical field of recovering valuable metals from tin smelting smoke by using a wet process, in particular to equipment for recovering zinc from tin smelting smoke.
Background
With the gradual consumption of tin resources of large-scale tin mines, the relatively large amount of tin ore raw materials with fixed types are gradually reduced, in recent years, the types of tin-containing materials in large-scale tin smelting plants are more and more complex, and particularly, after the proportion of various types of tin secondary raw materials in the tin smelting plants is gradually increased, one or more metal impurities which are not common in the traditional tin smelting field are circularly enriched in a tin smelting process. In order to reduce the influence of the impurity metals on the yield, quality and production efficiency of products in each production section of a tin smelting plant, and based on the principle of comprehensively recovering valuable metals and improving smelting benefits, a process for circularly enriching the impurity metals in the tin smelting process by removing and recovering is urgently needed to be additionally arranged in the tin smelting plant.
In the tin smelting process, tin smoke dust recovered from the flue gas in the smelting process is generally used as a returned product for granulation or humidification to be directly returned to a smelting furnace for smelting due to high tin content (Sn is more than or equal to 30 percent), so that the phenomenon of cyclic enrichment of low-melting-point metal impurities is easily caused in the process. After crude tin smelting production in a certain large tin smelting plant for a period of time, the phenomenon of gradual enrichment of zinc appears in smelting smoke dust, the zinc content of the smoke dust is generally 8-15 wt.%, the phenomena that a flue of a smelting furnace is easy to form nodules and block and the smoke dust in a smoke dust bin is easy to form agglomerates and is difficult to clean are caused, and smelting energy consumption is increased, so that smelting production efficiency is influenced. In addition, the smelting plant generates smoke dust rich in zinc and also generates enrichment of cadmium and chlorine, and the cadmium content is generally 1.5-5 wt%, and the chlorine content is generally 6-12 wt%. The influence of cadmium on tin smelting is similar to that of zinc, and chlorine can corrode smelting equipment, reduce the direct yield of tin smelting and damage the normal operation of a low-concentration sulfur dioxide acid making system in a tail gas treatment part in a smelting process. After phase analysis of tin smelting dust containing harmful impurities of zinc, cadmium and chlorine, zinc exists mostly as oxide, a small amount of zinc exists as chloride, cadmium exists mostly as chloride, and tin is basically oxide. Because most of cadmium in the smoke exists in a chloride state, the smoke is treated by a wet process to recover zinc, and the aim of simultaneously removing cadmium and chlorine can be fulfilled.
In the smelting industry, zinc enriched in smoke dust is generally recovered by adopting a wet leaching method, and a sulfuric acid leaching method is more common, for example, a sulfuric acid leaching-purifying-electrodeposition method is adopted in a lead smelting plant to recover the zinc. However, this method is not suitable for treating low-zinc flue dust (containing about 10% of Zn), and in the case of high content of elements harmful to zinc recovery, such as Fe, As, Cl, etc. Because the low-zinc smoke is treated by a sulfuric acid leaching mode, the concentration of zinc ions in the leaching solution is low, enrichment is difficult, and a large amount of harmful impurity elements such as iron, arsenic, chlorine and the like are introduced into the leaching solution, so that the zinc recovery from the purified solution is very difficult. The zinc content and impurity characteristics of the zinc-containing tin smoke dust produced by tin smelting belong to the situation that the common sulfuric acid is not suitable for direct leaching and recovery, so a new process route for recovering zinc from the tin smelting smoke dust with low zinc content and high impurity content needs to be found.
The utility model provides a device for recovering zinc from tin smelting smoke dust. The problem that impurity zinc in the smelting smoke dust is circularly enriched in the smelting smoke dust to have adverse effect on the smelting process of tin is solved, and the problem that zinc is more effectively recovered is urgently needed to be solved by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of the above, the utility model provides a device for recovering zinc from tin smelting smoke dust based on the harm of zinc enrichment in tin smelting smoke dust to the tin smelting production process, which can realize the recovery of valuable metal zinc and the recovery of zinc from tin smelting smoke dust while removing harmful element zinc from tin smelting smoke dust.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
a device for recovering zinc in tin smelting smoke dust comprises: the device comprises a leaching tank, a corrosion-resistant pump for pumping leaching slurry, a plate-and-frame filter press for leaching slurry solid separation, a slag washing tank, a corrosion-resistant pump for pumping washing slurry, a plate-and-frame filter press for washing slurry solid separation, a replacement tank, a plate-and-frame filter press for separating replacement slag, a plate-and-frame filter press for pumping a replaced slag-liquid mixture, an extraction and back-extraction tank and an electrolytic tank for recovering zinc by electrodeposition;
wherein the leaching tank is connected with a corrosion-resistant pump for pumping leaching slurry through a pipeline, the corrosion-resistant pump for pumping leaching slurry is connected with a plate-and-frame filter press for leaching slurry-solid separation through a pipeline, a discharge port of the plate-and-frame filter press for leaching slurry-solid separation is connected with a slag washing tank through a pipeline, the slag washing tank is connected with a corrosion-resistant pump for pumping slag washing slurry through a pipeline, the corrosion-resistant pump for pumping slag washing slurry is connected with the plate-and-frame filter press for washing slag slurry-solid separation through a pipeline, a liquid outlet of the plate-and-frame filter press for leaching slurry-solid separation is connected with a replacement tank through a pipeline, the replacement tank is connected with a plate-and-frame filter press for pumping replacement slag-liquid mixture through a pipeline, the plate-and-frame filter press for pumping replacement slag-liquid mixture is connected with a plate-and frame filter press for separating replacement slag through a pipeline, and the plate-and filter press for separating replacement slag is connected with an extraction tank and a back-extraction tank through a pipeline, the extraction and back-extraction tank is connected with an electrolytic tank for recovering zinc by electrodeposition through a pipeline.
By adopting the preferable scheme, the utility model has the beneficial effects that:
the equipment for recovering zinc in tin smelting smoke can further accelerate the zinc leaching rate and improve the zinc leaching rate, and can remove most of cadmium and chlorine harmful to the tin smelting process while removing zinc in the tin smelting smoke, so that the smoke is returned to the smelting process after being treated and is easier to treat, and the extracted organic phase can be recycled, so that the solution utilization rate of each section is higher, and the waste water amount is less; the equipment can effectively enrich zinc in the zinc-containing leachate with low concentration, so that the zinc obtained by leaching is easier to recover in a metal zinc product mode with higher value. The utility model has short flow, less used equipment and simple equipment operation, and is suitable for the popularization and application of various small-sized industrial production of large and medium-sized settings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a drawing showing the connection of an apparatus according to embodiment 1 of the present invention;
in the figure: 1-leaching tank, 2-corrosion-resistant pump for pumping leaching slurry, 3-plate-and-frame filter press for leaching slurry solid separation, 4-slag washing tank, 5-corrosion-resistant pump for pumping slag washing slurry, 6-plate-and-frame filter press for washing slurry solid separation, 7-replacement tank, 8-plate-and-frame filter press for separating replacement slag, 9-plate-and-frame filter press for pumping replaced slag-liquid mixture, 10-extraction and back-extraction tank, and 11-electrolytic tank for recovering zinc by electrodeposition.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the embodiment 1 of the utility model discloses equipment for recovering zinc in tin smelting smoke dust, and as shown in figure 1, the adopted technical scheme is as follows:
a device for recovering zinc in tin smelting smoke dust comprises: the device comprises a leaching tank 1, a corrosion-resistant pump 2 for pumping leaching slurry, a plate-and-frame filter press 3 for solid separation of leaching slurry, a slag washing tank 4, a corrosion-resistant pump 5 for pumping washing slurry, a plate-and-frame filter press 6 for solid separation of washing slurry, a replacement tank 7, a plate-and-frame filter press 8 for separating replacement slag, a plate-and-frame filter press 9 for pumping a mixture of replaced slag and liquid, an extraction and back-extraction tank 10 and an electrolytic tank 11 for recovering zinc by electrodeposition;
wherein, the leaching tank 1 is connected with a corrosion-resistant pump 2 for pumping leaching slurry through a pipeline, the corrosion-resistant pump 2 for pumping leaching slurry is connected with a plate-and-frame filter press 3 for leaching slurry-solid separation through a pipeline, a discharge port of the plate-and-frame filter press 3 for leaching slurry-solid separation is connected with a slag washing tank 4 through a pipeline, the slag washing tank 4 is connected with a corrosion-resistant pump 5 for pumping slag washing slurry through a pipeline, the corrosion-resistant pump 5 for pumping slag washing slurry is connected with a plate-and-frame filter press 6 for washing slurry-solid separation through a pipeline, a liquid outlet of the plate-and-frame filter press 3 for leaching slurry-solid separation is connected with a replacement tank 7 through a pipeline, the replacement tank 7 is connected with a plate-and-frame filter press 9 for pumping replacement slag-liquid mixture through a pipeline, the plate-and-frame filter press 9 for pumping replacement slag mixture is connected with a plate-and frame filter press 8 for separating replacement slag through a pipeline, the plate-frame filter press 8 for separating replacement slag is connected with an extraction and back-extraction tank 10 through a pipeline, the extraction and back-extraction tank 10 is connected with an electrolytic bath 11 for recovering zinc by electrodeposition through a pipeline.
The operation process is as follows:
after the zinc and tin containing smoke dust finishes leaching reaction in a leaching tank 1, pumping the leaching slurry into a plate and frame filter press 3 for leaching slurry and solid separation by using a corrosion-resistant pump 2 for pumping the leaching slurry, completing solid-liquid separation, transferring filter residues obtained by filter pressing of the leaching slurry into a residue washing tank 4 for washing through a discharge port of the plate and frame filter press 3 for leaching slurry and solid separation, pumping the filter residues into a plate and frame filter press 6 for washing slurry and solid separation by using a corrosion-resistant pump 5 for pumping the residue washing slurry after washing, filtering the filter residues for 5 times by repeatedly washing the filter residues, pumping the filter residues back to the leaching step for preparing leaching solution, and obtaining the filter residues after washing and filter pressing as zinc and tin removing smoke dust; filtrate obtained by filter pressing of the leached slurry flows into a replacement tank 7 through a liquid outlet of a plate-and-frame filter press 3 for solid separation of the leached slurry, zinc powder is added for replacement, the filtrate is pumped into a plate-and-frame filter press 8 for separating and replacing slag by using a plate-and-frame filter press 9 for pumping a mixture of slag and liquid after replacement, the obtained filter residue is sponge cadmium, the obtained filtrate flows into an extraction and back-extraction tank 10 through a pipeline to complete extraction and back-extraction operations, and back-extraction liquid is conveyed to an electrolytic tank 11 for recovering zinc by electrodeposition through a pipeline to complete zinc recovery by electrodeposition.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
1. The equipment for recovering zinc in tin smelting smoke dust is characterized by comprising the following components: the device comprises a leaching tank (1), a corrosion-resistant pump (2) for pumping leaching slurry, a plate-and-frame filter press (3) for separating leaching slurry from solid, a slag washing tank (4), a corrosion-resistant pump (5) for pumping the slag washing slurry, a plate-and-frame filter press (6) for separating slag washing slurry from solid, a replacement tank (7), a plate-and-frame filter press (8) for separating replacement slag, a plate-and-frame filter press (9) for pumping a mixture of replaced slag and liquid, an extraction and back-extraction tank (10), and an electrolytic tank (11) for recovering zinc by electrodeposition;
wherein the leaching tank (1) is connected with a corrosion-resistant pump (2) for pumping the leaching slurry through a pipeline, the corrosion-resistant pump (2) for pumping the leaching slurry is connected with a plate-and-frame filter press (3) for leaching slurry-solid separation through a pipeline, a discharge port of the plate-and-frame filter press (3) for leaching slurry-solid separation is connected with a slag washing tank (4) through a pipeline, the slag washing tank (4) is connected with a corrosion-resistant pump (5) for pumping the slag washing slurry through a pipeline, the corrosion-resistant pump (5) for pumping the slag washing slurry is connected with a plate-and-frame filter press (6) for washing slag slurry-solid separation through a pipeline, a liquid outlet of the plate-and-frame filter press (3) for leaching slurry-solid separation is connected with a replacement tank (7) through a pipeline, the replacement tank (7) is connected with a plate-and-frame filter press (9) for pumping the replaced slag-liquid mixture through a pipeline, the plate-and frame filter press (9) for pumping the replaced slag-liquid mixture is connected with a plate-and filter press (8) for separating and replacing slag through a pipeline, the plate-and-frame filter press (8) for separating and replacing slag is connected with an extraction and back-extraction tank (10) through a pipeline, and the extraction and back-extraction tank (10) is connected with an electrolytic bath (11) for recovering zinc through electrodeposition through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121935930.8U CN215887184U (en) | 2021-08-17 | 2021-08-17 | Equipment for recovering zinc in tin smelting smoke dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121935930.8U CN215887184U (en) | 2021-08-17 | 2021-08-17 | Equipment for recovering zinc in tin smelting smoke dust |
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| Publication Number | Publication Date |
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| CN215887184U true CN215887184U (en) | 2022-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121935930.8U Active CN215887184U (en) | 2021-08-17 | 2021-08-17 | Equipment for recovering zinc in tin smelting smoke dust |
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| CN (1) | CN215887184U (en) |
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- 2021-08-17 CN CN202121935930.8U patent/CN215887184U/en active Active
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