CN111015519A - Process method for treating multi-metal dust - Google Patents
Process method for treating multi-metal dust Download PDFInfo
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- CN111015519A CN111015519A CN201911414310.7A CN201911414310A CN111015519A CN 111015519 A CN111015519 A CN 111015519A CN 201911414310 A CN201911414310 A CN 201911414310A CN 111015519 A CN111015519 A CN 111015519A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
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Abstract
The invention relates to the technical field of dust removal processes, in particular to a process method for treating multi-metal dust. A process for treating polymetallic dusts, at least comprising the steps of: (1) the metal dust is sucked into the dust absorption tower body through a negative pressure fan, a water diversion valve is opened, a dedusting agent A component is sprayed out through a spray head, and the metal dust is washed and settled; (2) the metal dust and the dedusting agent A component solution fall into the dedusting agent B component solution at the bottom of the dust collection tower together under the action of gravity; (3) and after the dust removal is finished, opening a drain valve to discharge the liquid in the dust absorption tower. The invention provides a process method for treating multi-metal dust, which can remove dust rapidly and comprehensively, particularly prevent the metal dust generated in the polishing process from remaining, prevent the phenomena of combustion, explosion and the like caused by dust enrichment, prevent the environment from being polluted and prevent the occurrence of inhalation danger of human bodies, and improve the safety.
Description
Technical Field
The invention relates to the technical field of dust removal processes, in particular to a process method for treating multi-metal dust.
Background
The metal powder refers to a group of metal particles having a small size. Including single metal powders, alloy powders, and certain refractory compound powders having metallic properties. Polishing refers to a processing method for reducing the roughness of the surface of a workpiece by using mechanical, chemical or electrochemical actions to obtain a bright and flat surface, is an important process step in many production processes, and most metal products need to be polished to improve the aesthetic feeling of the appearance. However, dust generated in the polishing process causes pollution, and the long-term dust inhalation of human bodies threatens health, so that dust removal treatment is required in the polishing process.
Most of the existing dust removal processes are to draw dust out of a factory building through a negative pressure fan, but the dust is light in weight, easy to disperse and difficult to discharge completely, and large dust generated in the polishing process is difficult to draw out and can remain in the factory building. In addition, since the dust such as magnesium powder and aluminum powder may explode when it is enriched to a certain extent, it is necessary to provide a process for treating the dust of many metals, which can rapidly and completely absorb the dust generated by polishing.
Disclosure of Invention
In order to solve the above technical problem, a first aspect of the present invention provides a process for treating polymetallic dust, comprising at least the following steps:
(1) the metal dust is sucked into the dust absorption tower body through a negative pressure fan, a water diversion valve is opened, a dedusting agent A component is sprayed out through a spray head, and the metal dust is washed and settled;
(2) the metal dust and the dedusting agent A component solution fall into the dedusting agent B component solution at the bottom of the dust collection tower together under the action of gravity;
(3) and after the dust removal is finished, opening a drain valve to discharge the liquid in the dust absorption tower.
As a preferable technical scheme of the invention, the dust absorption tower comprises a tower body 6 and a trapezoidal groove 1; the tower body 6 is connected with the trapezoidal groove 1 through a pipeline 5; a plurality of spray heads 4 are arranged at the part of the pipeline 5 inserted into the tower body; a shunt valve 2 is arranged on the pipeline; the top of the tower body 6 is provided with an emptying pipe 9; the upper part of the tower body 6 is provided with a negative pressure fan 3; the middle part of the tower body 6 is provided with a sample inlet 7; and a drain valve 8 is arranged at the bottom of the tower body 6.
As a preferable technical scheme of the invention, the dedusting agent A component comprises sodium dodecyl sulfate, lauryl glucoside, potassium perfluorobutyl sulfonate, polyanionic cellulose and water, and the weight ratio is (15-25): (20-30): (5-12): (3-80): 100.
as a preferred technical solution of the present invention, the weight ratio of the sodium lauryl sulfate to the lauryl glucoside is 1: (0.8-2).
As a preferable technical solution of the present invention, the weight ratio of the potassium perfluorobutane sulfonate to the polyanionic cellulose is 1: (0.5-1.2).
As a preferred technical scheme of the invention, the dedusting agent B comprises sulfuric acid, phosphoric acid, hydrogen peroxide, ethylene diamine tetraacetic acid, aminoacetic acid and water, and the weight ratio is (5-15): (10-20): (5-10): (10-20): (10-20): 100.
as a preferred technical scheme of the invention, the component B of the dedusting agent also comprises polyethylene glycol; the weight ratio of the polyethylene glycol to the water is (0.5-3): 100.
as a preferred technical scheme of the invention, the molecular weight of the polyethylene glycol is lower than 1000.
The second aspect of the invention provides a dedusting agent, which comprises a dedusting agent A component and a dedusting agent B component; the weight ratio of the dedusting agent A component to the dedusting agent B component is 1: (5-10).
A third aspect of the invention provides the use of the process for treating polymetallic dust as described herein for the treatment of polished metal dust.
Has the advantages that: the invention provides a process method for treating multi-metal dust, which can remove dust rapidly and comprehensively, particularly prevent the metal dust generated in the polishing process from remaining, prevent the phenomena of combustion, explosion and the like caused by dust enrichment, prevent the environment from being polluted and prevent the occurrence of inhalation danger of human bodies, and improve the safety.
Drawings
Fig. 1 is a schematic structural diagram of a dust collection tower.
The meaning of the reference numerals in the diagram shown in fig. 1 is explained in turn as follows:
1 is a trapezoidal groove; 2 is a water pump; 3 is a negative pressure fan; 4 is a spray head; 5 is a pipeline; 6 is a tower body; 7 is a sample inlet; 8 is a blowoff valve; and 9 is an emptying pipe.
Detailed Description
The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
The term "prepared from …" as used herein is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.
Approximating language, as used herein throughout the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes portions that are literally received for modification without substantial change in the basic function to which the invention is related. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.
In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.
In order to solve the above technical problem, a first aspect of the present invention provides a process for treating polymetallic dust, comprising at least the following steps:
(1) the metal dust is sucked into the dust absorption tower body through a negative pressure fan, a water diversion valve is opened, a dedusting agent A component is sprayed out through a spray head, and the metal dust is washed and settled;
(2) the metal dust and the dedusting agent A component solution fall into the dedusting agent B component solution at the bottom of the dust collection tower together under the action of gravity;
(3) and after the dust removal is finished, opening a drain valve to discharge the liquid in the dust absorption tower.
In the invention, the dust absorption tower comprises a tower body 6 and a trapezoidal groove 1; the tower body 6 is connected with the trapezoidal groove 1 through a pipeline 5; a plurality of spray heads 4 are arranged at the part of the pipeline 5 inserted into the tower body; a shunt valve 2 is arranged on the pipeline; the top of the tower body 6 is provided with an emptying pipe 9; the upper part of the tower body 6 is provided with a negative pressure fan 3; the middle part of the tower body 6 is provided with a sample inlet 7; and a drain valve 8 is arranged at the bottom of the tower body 6.
In the invention, the dedusting agent A component comprises sodium dodecyl sulfate, lauryl glucoside, potassium perfluorobutyl sulfonate, polyanionic cellulose and water, and the weight ratio is (15-25): (20-30): (5-12): (3-80): 100.
preferably, the weight ratio of the sodium lauryl sulfate to the lauryl glucoside is 1: (0.8-2).
More preferably, the weight ratio of sodium lauryl sulfate to lauryl glucoside is 1: 1.5.
preferably, the weight ratio of the potassium perfluorobutyl sulfonate to the polyanionic cellulose is 1: (0.5-1.2).
More preferably, the weight ratio of the potassium perfluorobutylsulfonate to the polyanionic cellulose is 1: 0.8.
most preferably, the dedusting agent A component comprises sodium dodecyl sulfate, lauryl glucoside, potassium perfluorobutyl sulfonate, polyanionic cellulose and water in a weight ratio of 18: 27: 10: 8: 100.
the preparation method of the dedusting agent A component comprises the following steps: mixing sodium dodecyl sulfate, lauryl glucoside, potassium perfluorobutyl sulfonate, polyanionic cellulose and water, and stirring.
The inventor thinks that the metal dust is sucked into the dust absorption tower through the negative pressure fan and is washed and settled through the dust remover A component, so that the metal dust is captured and settled, no suspended metal dust is in the dust absorption tower, and the harm caused by the metal dust with too high concentration is avoided. The inventors speculate that the possible reason is that during the falling of the solution of the dedusting agent A component, the sodium dodecyl sulfate and lauryl glucoside molecules automatically shrink in volume along with the entry of air in the solution, so that a spherical cavity with a hydrophilic group facing water and a hydrophobic group facing air is formed, and air and metal dust are wrapped in the interior of the sphere. Meanwhile, the polyanionic cellulose has the functions of thickening, film forming, adhesion, water retention, colloid protection and the like, can stabilize the spherical cavity, and falls into the bottom of the dust collection tower under the action of gravity. In addition, the potassium perfluorobutyl sulfonate molecule is composed of hydrophilic groups and hydrophobic groups, so that the surface tension of water is reduced, the surface of the metal dust can be wetted by water, when the potassium perfluorobutyl sulfonate molecule is contacted with the metal dust, the metal dust is firstly contacted with the hydrophobic groups adsorbed on the water surface layer, the hydrophobic groups contain more fluorine atoms and have high electronegativity, and after the potassium perfluorobutyl sulfonate molecule is compounded with polyanionic cellulose for use, the potassium perfluorobutyl sulfonate molecule is adsorbed with the metal dust through electrostatic interaction, so that the dust catching efficiency of the dust remover is improved, and the dust settling rate reaches over 99%.
Preferably, the component B of the dedusting agent comprises sulfuric acid, phosphoric acid, hydrogen peroxide, ethylene diamine tetraacetic acid, aminoacetic acid and water, and the weight ratio is (5-15): (10-20): (5-10): (10-20): (10-20): 100.
preferably, the sulfuric acid is concentrated sulfuric acid, and the mass fraction of the sulfuric acid is more than 70%.
More preferably, the mass fraction of the sulfuric acid is 98%.
Preferably, the dedusting agent B component also comprises polyethylene glycol; the weight ratio of the polyethylene glycol to the water is (0.5-3): 100.
more preferably, the weight ratio of the polyethylene glycol to water is 1.8: 100.
preferably, the polyethylene glycol has a molecular weight of less than 1000.
In the invention, the polyethylene glycol is polyethylene glycol 200.
Most preferably, the component B of the dedusting agent comprises sulfuric acid, phosphoric acid, hydrogen peroxide, ethylene diamine tetraacetic acid, aminoacetic acid, water and polyethylene glycol, and the weight ratio is 10: 15: 8: 15: 15: 100: 1.8.
the preparation method of the dedusting agent B component comprises the following steps: mixing sulfuric acid, phosphoric acid, hydrogen peroxide, ethylene diamine tetraacetic acid, aminoacetic acid, water and polyethylene glycol, and stirring.
The inventor believes that the component B of the dedusting agent can be well absorbed and can quickly and efficiently convert metal dust ions into metal ions. The inventor conjectures that the metal dust absorbed by the component B of the dedusting agent becomes an ionic state after reacting with components such as sulfuric acid, hydrochloric acid and the like, and the polyhydroxy structures in the ethylenediamine tetraacetic acid and the aminoacetic acid and the metal ions can form a relatively stable complex structure, so that the metal ions in the dedusting agent are reduced, hydrogen ions are continuously ionized, and the activity of the dedusting agent solution is improved, so that the dust absorption speed of the dedusting agent is always kept at a relatively high speed, and the conditions that the surface of the dedusting agent is accumulated and the metal dust absorption effect of the dedusting agent is poor after use are avoided.
The second aspect of the invention provides a dedusting agent, which comprises a dedusting agent A component and a dedusting agent B component; the weight ratio of the dedusting agent A component to the dedusting agent B component is 1: (5-10).
Preferably, the weight ratio of the dedusting agent A component to the dedusting agent B component is 1: 8.
the inventor believes that the metal dust is settled to the component B of the dust removing agent, and the absorption speed of the dust removing agent to the metal dust, particularly the metal dust generated in the polishing of aluminum alloy and magnesium alloy, is improved to a certain extent. The inventor conjectures that the metal dust falls into the dedusting agent component B and then introduces a perturbation effect, the metal dust is adsorbed on the surface of a liquid film as a third phase substance, and because the polyethylene glycol 200 has good dispersibility and surface activity, the metal dust particles can be effectively dispersed, the contact area between the metal dust and the dedusting agent is increased, the diffusion and adsorption of the dust to the interior of the dedusting agent are promoted, and the metal dust in the environment can be rapidly and continuously absorbed by the dedusting agent. In addition, due to the presence of the surface active substance, repulsive force is generated between the fine particles, so that the fine particles cannot come into contact, thereby preventing the occurrence of agglomeration, rapidly converting the metal dust particles into metal ions, and preventing the aggregation of bubbles. In addition, the polyethylene glycol 200 has the effect of improving the formation and stability of microbubbles, improves the gas content and the retention time of bubbles, partially counteracts the adverse effect of the polyethylene glycol on the mass transfer process of hydrogen, reduces the surface tension of a liquid film, reduces the resistance of the liquid film, is beneficial to the mass transfer of the hydrogen from the liquid to the bubbles, and thus effectively improves the rate of converting metal dust into metal ions.
The dust remover provided by the invention has stable property, uniform diffusion and good dust removal effect, can purify the air at the top of the dust collection tower, reduce the harm of dust caused by overlarge dust density in the tower, quickly reduce metal dust and convert the metal dust into metal ions, is scientific and effective in preparation method, and is suitable for large-scale industrial popularization.
A third aspect of the invention provides the use of the process for treating polymetallic dust as described herein for the treatment of polished metal dust.
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the starting materials used are all commercially available, unless otherwise specified.
Examples
The embodiment provides a schematic structural diagram of a dust collection tower, which is shown in figure 1.
The dust absorption tower comprises a tower body 6 and a trapezoidal groove 1; the tower body 6 is connected with the trapezoidal groove 1 through a pipeline 5; a plurality of spray heads 4 are arranged at the part of the pipeline 5 inserted into the tower body; a shunt valve 2 is arranged on the pipeline; the top of the tower body 6 is provided with an emptying pipe 9; the upper part of the tower body 6 is provided with a negative pressure fan 3; the middle part of the tower body 6 is provided with a sample inlet 7; and a drain valve 8 is arranged at the bottom of the tower body 6.
Example 1
Embodiment 1 provides a process for treating multi-metal dust comprising the steps of:
(1) the metal dust is sucked into the dust absorption tower body through a negative pressure fan, a water diversion valve is opened, a dedusting agent A component is sprayed out through a spray head, and the metal dust is washed and settled;
(2) the metal dust and the dedusting agent A component solution fall into the dedusting agent B component solution at the bottom of the dust collection tower together under the action of gravity;
(3) and after the dust removal is finished, opening a drain valve to discharge the liquid in the dust absorption tower.
The dedusting agent A comprises sodium dodecyl sulfate, lauryl glucoside, potassium perfluorobutyl sulfonate, polyanionic cellulose and water, and the weight ratio is 18: 27: 10: 8: 100.
the preparation method of the dedusting agent A component comprises the following steps: mixing sodium dodecyl sulfate, lauryl glucoside, potassium perfluorobutyl sulfonate, polyanionic cellulose and water, and stirring.
The dedusting agent B comprises sulfuric acid, phosphoric acid, hydrogen peroxide, ethylene diamine tetraacetic acid, aminoacetic acid, water and polyethylene glycol, and the weight ratio is 10: 15: 8: 15: 15: 100: 1.8; the mass fraction of the sulfuric acid is 98 percent; the polyethylene glycol is polyethylene glycol 200.
The preparation method of the dedusting agent B component comprises the following steps: mixing sulfuric acid, phosphoric acid, hydrogen peroxide, ethylene diamine tetraacetic acid, aminoacetic acid, water and polyethylene glycol, and stirring.
The weight ratio of the dedusting agent A component to the dedusting agent B component is 1: 8.
example 2
Embodiment 2 provides a process for treating multi-metal dust, comprising the steps of:
(1) the metal dust is sucked into the dust absorption tower body through a negative pressure fan, a water diversion valve is opened, a dedusting agent A component is sprayed out through a spray head, and the metal dust is washed and settled;
(2) the metal dust and the dedusting agent A component solution fall into the dedusting agent B component solution at the bottom of the dust collection tower together under the action of gravity;
(3) and after the dust removal is finished, opening a drain valve to discharge the liquid in the dust absorption tower.
The dedusting agent A comprises sodium dodecyl sulfate, lauryl glucoside, potassium perfluorobutyl sulfonate, polyanionic cellulose and water, and the weight ratio is 15: 30: 5: 6: 100.
the preparation method of the dedusting agent A component comprises the following steps: mixing sodium dodecyl sulfate, lauryl glucoside, potassium perfluorobutyl sulfonate, polyanionic cellulose and water, and stirring.
The dedusting agent B comprises sulfuric acid, phosphoric acid, hydrogen peroxide, ethylene diamine tetraacetic acid, aminoacetic acid, water and polyethylene glycol, and the weight ratio is 5: 10: 5: 10: 10: 100: 0.5; the mass fraction of the sulfuric acid is 98 percent; the polyethylene glycol is polyethylene glycol 200.
The preparation method of the dedusting agent B component comprises the following steps: mixing sulfuric acid, phosphoric acid, hydrogen peroxide, ethylene diamine tetraacetic acid, aminoacetic acid, water and polyethylene glycol, and stirring.
The weight ratio of the dedusting agent A component to the dedusting agent B component is 1: 5.
example 3
Embodiment 3 provides a process for treating multi-metal dust, comprising the steps of:
(1) the metal dust is sucked into the dust absorption tower body through a negative pressure fan, a water diversion valve is opened, a dedusting agent A component is sprayed out through a spray head, and the metal dust is washed and settled;
(2) the metal dust and the dedusting agent A component solution fall into the dedusting agent B component solution at the bottom of the dust collection tower together under the action of gravity;
(3) and after the dust removal is finished, opening a drain valve to discharge the liquid in the dust absorption tower.
The dedusting agent A comprises sodium dodecyl sulfate, lauryl glucoside, potassium perfluorobutyl sulfonate, polyanionic cellulose and water, and the weight ratio is 25: 20: 12: 6: 100.
the preparation method of the dedusting agent A component comprises the following steps: mixing sodium dodecyl sulfate, lauryl glucoside, potassium perfluorobutyl sulfonate, polyanionic cellulose and water, and stirring.
The dedusting agent B comprises sulfuric acid, phosphoric acid, hydrogen peroxide, ethylene diamine tetraacetic acid, aminoacetic acid, water and polyethylene glycol, and the weight ratio is 15: 20: 10: 20: 20: 100: 3; the mass fraction of the sulfuric acid is 98 percent; the polyethylene glycol is polyethylene glycol 200.
The preparation method of the dedusting agent B component comprises the following steps: mixing sulfuric acid, phosphoric acid, hydrogen peroxide, ethylene diamine tetraacetic acid, aminoacetic acid, water and polyethylene glycol, and stirring.
The weight ratio of the dedusting agent A component to the dedusting agent B component is 1: 10.
example 4
Example 4 differs from example 1 in that in the dedusting agent a component, sodium lauryl sulfate was replaced with sodium hexacosanyl sulfate.
Example 5
Example 5 differs from example 1 in that in the dedusting agent a component, sodium lauryl sulfate was replaced with sodium n-hexyl sulfate.
Example 6
Example 6 differs from example 1 in that in the dusting agent a component, the lauryl glucoside was replaced with n-hexyl glucoside.
Example 7
Example 7 differs from example 1 in that the dedusting agent a component does not contain polyanionic cellulose.
Example 8
Example 8 differs from example 1 in that the dedusting agent a component does not contain potassium perfluorobutane sulfonate.
Example 9
Example 9 differs from example 1 in that the dedusting agent B component does not contain polyethylene glycol.
Example 10
Example 10 differs from example 1 in that polyethylene glycol 200 in the dedusting agent B component is replaced with polyethylene glycol 2000.
Performance testing
And (4) testing the dust fall rate: at 25 ℃, under normal pressure, the same amount of the dedusting agent A component (5Kg) and the dedusting agent B component provided in the embodiments 1-10 are respectively added into the trapezoid groove and the bottom of the tower body of the dust absorption tower; introducing 30s of dust generated during polishing of magnesium alloy and aluminum alloy at the speed of 60mL/min, and testing the dust concentration at the upper part of the tower body; and then opening the shunt valve, removing dust according to the process method for treating the multi-metal dust provided by the invention, testing the dust concentration at the upper part of the dust absorption tower after the spraying of the dedusting agent component A is finished, and calculating the dust fall rate of the dedusting agent component A.
The test results are shown in Table 1.
TABLE 1 test results of dust fall rate in examples 1-8.
In examples 1 to 3, the dust remover has a high absorption rate of metal dust, uniform diffusion and a good dust removal effect.
In example 9, the dust-removing agent absorbed metal dust at a low speed, suspended metal was present on the surface, and the metal dust in the interior was not uniformly diffused and easily accumulated.
In example 10, metal dust was accumulated on the surface of the dust remover, and the dust remover had a slow absorption rate of metal dust, and the dust removal effect was poor.
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.
Claims (10)
1. A process for treating polymetallic dusts, characterized in that it comprises at least the following steps:
(1) the metal dust is sucked into the dust absorption tower body through a negative pressure fan, a water diversion valve is opened, a dedusting agent A component is sprayed out through a spray head, and the metal dust is washed and settled;
(2) the metal dust and the dedusting agent A component solution fall into the dedusting agent B component solution at the bottom of the dust collection tower together under the action of gravity;
(3) and after the dust removal is finished, opening a drain valve to discharge the liquid in the dust absorption tower.
2. A process for handling polymetallic dust according to claim 1, wherein the dust absorption tower comprises a tower body (6) and a trapezoidal shaped slot (1); the tower body (6) is connected with the trapezoidal groove (1) through a pipeline (5); a plurality of spray heads (4) are arranged at the part of the pipeline (5) inserted into the tower body; a shunt valve (2) is arranged on the pipeline; the top of the tower body (6) is provided with an emptying pipe (9); the upper part of the tower body (6) is provided with a negative pressure fan (3); the middle part of the tower body (6) is provided with a sample inlet (7); and a drain valve (8) is arranged at the bottom of the tower body (6).
3. A process of treating polymetallic dust according to claim 1 wherein said dedusting agent a component comprises sodium lauryl sulfate, lauryl glucoside, potassium perfluorobutyl sulfonate, polyanionic cellulose and water in the weight ratio of (15-25): (20-30): (5-12): (3-80): 100.
4. a process of handling polymetallic dust according to claim 3 wherein the weight ratio of sodium lauryl sulfate to lauryl glucoside is 1: (0.8-2).
5. A process according to claim 3, wherein the weight ratio of potassium perfluorobutylsulfonate to polyanionic cellulose is 1: (0.5-1.2).
6. The process method for treating multi-metal dust according to claim 1, wherein the dedusting agent B comprises sulfuric acid, phosphoric acid, hydrogen peroxide, ethylene diamine tetraacetic acid, aminoacetic acid and water in a weight ratio of (5-15): (10-20): (5-10): (10-20): (10-20): 100.
7. a process according to claim 6, wherein said dedusting agent B component further comprises polyethylene glycol; the weight ratio of the polyethylene glycol to the water is (0.5-3): 100.
8. a process of handling polymetallic dust according to claim 7 wherein the polyethylene glycol has a molecular weight not higher than 1000.
9. A dust-removing agent characterized by comprising the dust-removing agent a component of any one of claims 3 to 5 and the dust-removing agent B component of any one of claims 6 to 8; the weight ratio of the dedusting agent A component to the dedusting agent B component is 1: (5-10).
10. Use of a process for the treatment of polymetallic dusts according to any of claims 1 to 8, characterized in that it is used in the treatment of polished metal dusts.
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