1. The utility model provides a copper smelting white smoke dust step piece-rate system which characterized in that:

a first-stage separation unit: a slurrying tank (10) for receiving white smoke of a copper smelting system, wherein a stirring blade bar (11) is arranged in the slurrying tank (10); a conveying pipeline arranged at the lower part of the slurrying tank (10) is provided with a conveying pump (12) for pumping materials to a downstream separation unit;

a secondary separation unit: a feed inlet of the cyclone separator (20) is connected with a downstream pipeline of the delivery pump (12), a high copper slag groove (50) is arranged below a sand setting nozzle (21) at the bottom of the cyclone separator (20), and overflow liquid or underflow enriching pipe (23) at the lower part of the cyclone separator (20) conveys the underflow liquid to a downstream separation unit through an overflow pipe (22) at the upper part of the cyclone separator (20);

a third-stage separation unit: overflow liquid from an overflow pipe (22) at the upper part of a cyclone separator (20) of the secondary separation unit or enriched underflow liquid from an enriched underflow pipe (23) is conveyed to a shaking table group (30) formed by connecting unit layer shaking tables (31) in parallel, high copper slag containing 30-60% of copper enters a high copper slag groove (50) from the end part of the unit layer shaking tables (31), and ultrafine and small amount of copper-containing particles enter a downstream separation unit along with white slag slurry from the side part of the unit layer shaking tables (31).

2. The copper smelting white smoke stepped separation system according to claim 1, characterized in that: the superfine and small amount of copper-containing particles in the third-stage separation unit enter a fourth-stage separation unit comprising a thickener (60) along with white slag slurry from the side part of the unit layer shaking table (31), and the underflow of the thickener (60) is sent to a reaction tank (70).

3. The copper smelting white smoke stepped separation system according to claim 1, characterized in that: an overflow pipe (22) at the upper part of the cyclone separator (20) selectively conveys overflow liquid to a shaker group (30) in a downstream third-stage separation unit or a thickener (60) in a fourth-stage separation unit.

4. The copper smelting white smoke stepped separation system of claim 3, wherein: the cyclone separator (20) is detachably connected with a sand setting nozzle (21) at the bottom, and the overflow pipe (22) is connected with a flow valve.

5. A copper smelting white smoke dust step separation process comprises the following steps:

primary slurrying and separating: putting white smoke dust from a copper smelting system into a slurrying tank (10), enabling the slurry liquid-solid ratio in the slurrying tank (10) to be 5-6: 1, controlling the stirring rotating speed in the slurrying tank to be 120-160 r/pm, and slurrying for 90-150 min;

secondary cyclone separation: the slurried mixed liquor passes through a cyclone separator (20), the inlet pressure is controlled to be 0.2-0.3 Mpa, the flow is controlled to be 0.5-5 m3/h, a sand setting nozzle is controlled to adjust the distribution ratio of the bottom flow and the upper overflow liquor, the secondary separation of insoluble copper in the slurry is implemented, wherein the bottom flow slag containing 30-60% of copper can be directly sent to a copper smelting system for recycling, and the overflow slurry containing lower copper automatically flows into a third-stage separation;

and (3) three-stage separation: and (3) conveying the upper overflow liquid or the enriched underflow liquid after the secondary cyclone separation to a shaking bed group (30) formed by connecting unit layer shaking tables (31) in parallel, controlling the stroke to be 8-16 mm and the stroke frequency to be 250-350 times/min, enabling the high-copper slag containing 30-60% of copper to enter a high-copper slag groove (50) from the end part, and enabling ultrafine particles containing a small amount of copper to enter a downstream processing unit along with white slag slurry from the side part of the unit layer shaking tables (31).

6. The copper smelting white smoke dust step separation process according to claim 4, characterized in that: and the superfine and small amount of copper-containing particles in the third-stage separation unit enter a fourth-stage separation unit comprising a thickener (60) along with white slag slurry from the side part of the unit layer shaking table (31), the bottom flow of the thickener (60) is sent into a reaction tank (70), the concentration of sulfuric acid in the reaction tank (70) is controlled to be 30-50 g/L, the liquid-solid ratio is 5-10: 1, and the reaction is carried out at normal temperature and pressure for 60-120 min.

7. The copper smelting white smoke stepped separation system of claim 5, characterized in that: an overflow pipe (22) at the upper part of the cyclone separator (20) selectively conveys overflow liquid to a shaker group (30) in a downstream third-stage separation unit or a thickener (60) in a fourth-stage separation unit.

Background

The white smoke produced in the copper smelting process contains valuable elements such as copper, lead, zinc and the like, but because the components are complex and have large fluctuation, the grain diameter of less than 0.2 mu m accounts for more than 70 percent, the separation by a simple physical or chemical method cannot achieve an ideal effect, and the utilization rate is low. At present, the major pyrometallurgical, pyrometallurgical-hydrometallurgical combined and total wet process technologies which are used for separating or comprehensively utilizing copper in white smoke dust in China are mostly adopted, along with the increasing of the requirements of environmental protection and cost reduction and efficiency improvement, the pyrometallurgical treatment process with high environmental pollution and high energy consumption is gradually replaced by a new process, and the existing total wet process technology has poor adaptability to large-amplitude fluctuation of the copper grade in the white smoke dust, low separation efficiency and high energy consumption. How to realize the high-efficiency separation of valuable elements such as copper, zinc and the like in the white smoke dust at lower cost is a difficult problem faced by various smelting enterprises at present.

Disclosure of Invention

The invention aims to provide a step separation system for white smoke dust, which improves the adaptability of white smoke dust separation and strengthens the separation effect of valuable elements.

In order to achieve the purpose, the invention adopts the following technical scheme,

the utility model provides a copper smelting white smoke dust step piece-rate system which characterized in that:

a first-stage separation unit: the slurrying tank is used for receiving white smoke of the copper smelting system, and a stirring blade rod is arranged in the slurrying tank; a conveying pipeline arranged at the lower part of the pulping tank is provided with a conveying pump for pumping materials to a downstream separation unit;

a secondary separation unit: a feeding port of the cyclone separator is connected with a downstream pipeline of the delivery pump, a high copper slag groove is arranged below a sand setting nozzle at the bottom of the cyclone separator, and overflow liquid or an enriched underflow pipe at the lower part of the cyclone separator conveys underflow liquid to a downstream separation unit through an overflow pipe at the upper part of the cyclone separator;

a third-stage separation unit: and the overflow liquid from the overflow pipe at the upper part of the cyclone separator of the second-stage separation unit or the enriched underflow liquid of the enriched underflow pipe is conveyed to a table concentrator group formed by connecting unit layer table concentrators in parallel, the copper-containing high-copper slag with the concentration of 30-60% enters a high-copper slag groove from the end part of the unit layer table concentrator, and the ultrafine and small copper-containing particles enter a downstream separation unit along with white slag slurry from the side part of the unit layer table concentrator.

The invention also aims to provide a copper smelting white smoke dust step separation process, which comprises the following steps:

primary slurrying and separating: putting white smoke dust from a copper smelting system into a slurrying tank, enabling the liquid-solid ratio of slurry in the slurrying tank to be 5-6: 1, controlling the stirring rotating speed in the slurrying tank to be 120-160 r/pm, and slurrying for 90-150 min;

secondary cyclone separation: enabling the slurried mixed liquor to pass through a cyclone separator, controlling the inlet pressure to be 0.2-0.3 Mpa and the flow to be 0.5-5 m3/h through frequency conversion, controlling a sand settling nozzle to adjust the distribution ratio of the underflow and the upper overflow liquor to implement secondary separation of insoluble copper in the slurry, wherein the underflow slag containing 30-60% of copper can be directly sent to a copper smelting system for recycling, and the overflow slurry containing lower copper automatically flows into three-stage separation;

and (3) three-stage separation: and (3) conveying the upper overflow liquid or the enriched underflow liquid after the second-stage cyclone separation to a table concentrator group formed by connecting unit-layer table concentrators in parallel, controlling the stroke to be 8-16 mm and the stroke frequency to be 250-350 times/min, enabling the high-copper slag containing 30-60% of copper to enter a high-copper slag groove from the end part, and enabling ultrafine and small-amount copper-containing particles to enter a downstream processing unit along with white slag slurry from the side part of the unit-layer table concentrator.

The invention adopts a step-by-step, namely stepped separation system and a corresponding process, effectively treats the copper smelting white smoke dust, and has the advantages of simple process and operation, low energy consumption and less investment.

Drawings

FIG. 1 is a system schematic of the present invention.

Detailed Description

Example 1

As shown in figure 1, the copper smelting white smoke step separation system comprises the following components:

a first-stage separation unit: a slurrying tank 10 for receiving white smoke of the copper smelting system, wherein a stirring blade bar 11 is arranged in the slurrying tank 10; a conveying pipeline arranged at the lower part of the slurrying tank 10 is provided with a conveying pump 12 for pumping materials to a downstream separation unit; the primary separation unit can also be regarded as a primary slurrying separation unit, white smoke dust from a copper smelting system is fed into the slurrying tank 10, a basic place is provided for ensuring accumulation of specific gravity particles at the bottom of the tank, and soluble copper and zinc in the smoke dust are separated from a solid phase and enter a solution after materials in the slurrying tank 10 are slurried at a proper rotating speed for a proper time, so that primary separation of a soluble part of valuable elements is realized;

a secondary separation unit: a feeding port of the cyclone separator 20 is connected with a downstream pipeline of the delivery pump 12, a high copper slag groove 50 is arranged below a sand setting nozzle 21 at the bottom of the cyclone separator 20, and overflow liquid is conveyed to a downstream separation unit by an overflow pipe 22 at the upper part of the cyclone separator 20 or underflow liquid is conveyed to an enrichment underflow pipe 23 at the lower part of the cyclone separator 20; the cyclone separator 20 is detachably connected with a sand setting nozzle 21 at the bottom, and a flow valve is connected to an overflow pipe 22. When the system is operated, the sand setting nozzle which can be changed in time adjusts the distribution proportion of the underflow and the overflow liquid at the upper part, so as to realize the secondary separation of insoluble copper in the slurry, wherein, the underflow slag containing 30 to 60 percent of copper can be directly sent to a copper smelting system for recycling, and the overflow slurry containing lower copper automatically flows into a third-stage separation unit;

a third-stage separation unit: overflow pipe 22 overflow liquid or enriched underflow liquid from the upper part of the cyclone separator 20 of the second-stage separation unit is conveyed to a shaking table group 30 formed by connecting unit layer shaking tables 31 in parallel, and high copper slag containing 30-60% of copper enters a high copper slag groove 50 from the end part of the unit layer shaking table 31 and can directly return to a copper smelting system for comprehensive utilization; the extremely fine and small amount of copper-containing particles enter the downstream separation unit with the white slag slurry from the side of the unit layer cradle 31.

Preferably, the very fine and small amount of copper-containing particles in the third stage separation unit enter the fourth stage separation unit including the thickener 60 with the white slag slurry from the side of the unit layer table 31, and the underflow of the thickener 60 is fed to the reaction tank 70.

A small amount of insoluble copper, zinc and the like which cannot be completely separated in the first, second and third-stage separation are dissolved and enter a solution to be separated from solid slag through a thickener 60, the solid slag rich in lead and bismuth after solid-liquid separation is used as a raw material for extracting lead and bismuth, and the solution containing copper and zinc can be respectively subjected to a chemical precipitation method through a reaction tank 70 to produce byproducts for further purification or direct sale.

More preferably, the overflow pipe 22 at the upper part of the cyclone separator 20 selectively transfers overflow liquid to the shaking table set 30 in the downstream third separation unit or the thickener 60 in the fourth separation unit. Wherein, the underflow slag containing 30 to 60 percent of copper can be directly sent to a copper smelting system for recycling, and the overflow slurry containing lower copper automatically flows into the third-stage separation. The process can also realize the enrichment of valuable elements in the underflow liquid and send the enriched valuable elements into the third-stage separation unit through valve adjustment and sand setting nozzle conversion, and the overflow liquid with extremely low copper content is directly subjected to the process from the open circuit to the fourth-stage separation unit, so that the adaptability of the process to the content of valuable metals and the granularity of smoke dust in the raw materials is greatly improved.

Example 2

A copper smelting white smoke dust step separation process comprises the following steps:

primary slurrying and separating: putting white smoke dust from a copper smelting system into a slurrying tank 10, enabling the slurry liquid-solid ratio in the slurrying tank 10 to be 5-6: 1, controlling the stirring rotating speed in the slurrying tank 10 to be 120-160 r/pm, and enabling the slurrying time to be 90-150 min; separating soluble copper and zinc in the smoke from the solid phase, and enabling the soluble copper and the soluble zinc to enter a solution, thereby realizing the preliminary separation of a soluble part of valuable elements;

secondary cyclone separation: the slurried mixed liquor passes through a cyclone separator 20, the inlet pressure is controlled to be 0.2-0.3 Mpa through frequency conversion, the flow is controlled to be 0.5-5 m3/h, a sand settling nozzle is controlled to adjust the distribution ratio of the bottom flow and the upper overflow liquor, the secondary separation of insoluble copper in the slurry is implemented, wherein the bottom flow slag containing 30-60% of copper can be directly sent to a copper smelting system for recycling, and the overflow slurry containing lower copper automatically flows into a third-stage separation;

and (3) three-stage separation: and (3) conveying the upper overflow liquid or the enriched underflow liquid after the second-stage cyclone separation to a table concentrator group 30 formed by connecting unit layer table concentrators 31 in parallel, controlling the stroke to be 8-16 mm and the stroke to be 250-350 times/min, enabling the high-copper slag containing 30-60% of copper to enter a high-copper slag groove 50 from the end part, and enabling the ultrafine and small amount of copper-containing particles to enter a next-stage separation unit along with white slag slurry from the side part of the unit layer table concentrator 31.

And (3) leading the ultrafine and small amount of copper-containing particles in the third-stage separation unit to enter a fourth-stage separation unit comprising a thickener 60 from the side part of the unit layer shaking table 31 along with the white slag slurry, feeding the bottom flow of the thickener 60 into a reaction tank 70, controlling the concentration of sulfuric acid in the reaction tank 70 to be 30-50 g/L, controlling the liquid-solid ratio to be 5-10: 1, and reacting at normal temperature and pressure for 60-120 min. A small amount of insoluble copper, zinc and the like which cannot be completely separated in the first, second and third-stage separation are dissolved and enter a solution to be separated from solid slag through a thickener 60, the solid slag rich in lead and bismuth after solid-liquid separation is used as a raw material for extracting lead and bismuth, and the solution containing copper and zinc can be respectively subjected to a chemical precipitation method through a reaction tank 70 to produce byproducts for further purification or direct sale.

An overflow pipe 22 at the upper part of the cyclone separator 20 selectively conveys overflow liquid to a shaking table group 30 in a downstream three-stage separation unit or a thickener 60 in a four-stage separation unit. The process steps can realize the enrichment of valuable elements in the underflow liquid and send the enriched valuable elements into the third-stage separation through valve adjustment and sand setting nozzle conversion, and the overflow liquid with extremely low copper content is directly subjected to the process from open circuit to the fourth-stage separation, so that the adaptability of the process to the content of valuable metals and the granularity of smoke dust in the raw materials is greatly improved.

The technical effects of the invention are concentrated in the following aspects:

(1) the process forms a brand-new white smoke dust step separation process by the development of new equipment and related matched combination, and has the advantages of simple process and operation, low energy consumption and less investment;

(2) the white smoke dust with different properties and 3-20% of copper content can be efficiently separated through timely adjustment and process route transformation, and compared with the traditional wet process, the process has the advantages that the application range is greatly widened;

(3) the process basically does not need other energy and auxiliary material consumption except less water and electricity, more than 80 percent of water can be recycled, and the whole operation is clean, so compared with the traditional fire method and wet method, the process has the remarkable characteristics of low operation cost and good environmental benefit.