Composition for melting of scale-inhibiting alloys, filter material, melting membrane and method for producing same

Abstract

This application relates to the field of scale inhibitor alloys and their smelting technology, and in particular to a composition for smelting scale inhibitor alloys, filter media, smelting membranes, and their preparation methods. This composition has a low nickel content and a relatively high iron content, thereby reducing costs. When this composition for smelting scale inhibitor alloys is smelted by strip spinning, the scale inhibitor alloy exhibits a high degree of grain refinement with no significant segregation, superior corrosion resistance and scale inhibition performance, and improved recovery rate, further reducing costs. A composition for smelting scale inhibitor alloys comprises metallic materials of Fe, Zn, Sn, Ni, and Cu; wherein, in the composition, the mass percentage of Fe is 12%~29.5%, the mass percentage of Zn is 20%~28%, the mass percentage of Sn is 13%~16.5%, the mass percentage of Ni is 3%~6.5%, and the balance is Cu.

Description

Technical Field

[0001] This application relates to the field of scale inhibitor alloys and their smelting technology, and in particular to a composition, filter media, smelting membrane and preparation method for scale inhibitor alloy smelting. Background Technology

[0002] Scale-inhibiting alloy filter media is a scale-inhibiting material with a lifespan of 3-5 years. Different metals in the scale-inhibiting alloy have different electrode potentials, and the combination of these metals can generate an activation current in the water flow. This activation current can alter the movement and distribution of calcium and magnesium ions in the water, thereby inhibiting the formation of scale by calcium and magnesium ions and achieving the scale-inhibiting effect.

[0003] In related technologies, the main component is a quaternary alloy of copper, nickel, zinc and tin, with other trace elements as supplements. The alloy is formed into an ingot through atmospheric melting and casting, and then the ingot is machined to form a scale-inhibiting alloy machining material. After screening and cleaning, it forms a scale-inhibiting alloy filter material.

[0004] To address the issue of poor corrosion resistance in scale-inhibiting alloy filter media caused by significant differences in alloy microstructure due to inconsistent cooling rates between the core and surface layers during atmospheric melting and casting, this scale-inhibiting alloy filter media contains a high amount of nickel, typically requiring an addition of over 10% by mass, resulting in higher costs. Summary of the Invention

[0005] Based on this, some embodiments of this application provide a composition for smelting scale-inhibiting alloys, which has a low nickel content and a relatively high iron content, thereby reducing costs. When this composition for smelting scale-inhibiting alloys is smelted by strip spinning, the scale-inhibiting alloy exhibits a high degree of grain refinement with no significant segregation, superior corrosion resistance and scale inhibition performance, and improved recovery rate, further reducing costs. Other embodiments of this application also provide scale-inhibiting alloy smelting membranes, scale-inhibiting alloy filter media, and methods for preparing scale-inhibiting alloy smelting membranes and filter media using the composition for smelting scale-inhibiting alloys.

[0006] In a first aspect, a composition for smelting scale-inhibiting alloys is provided, the composition comprising metallic materials of Fe, Zn, Sn, Ni and Cu;

[0007] In the composition for smelting scale-inhibiting alloys, the mass percentage of Fe is 12% to 29.5%, the mass percentage of Zn is 20% to 28%, the mass percentage of Sn is 13% to 16.5%, the mass percentage of Ni is 3% to 6.5%, and the balance is Cu.

[0008] Optionally, in the composition for smelting scale-inhibiting alloys, the mass percentages of Fe, Zn, Sn, and Ni are 18.2%, 25.5%, 14.0%, and 4.2%, respectively, with the balance being Cu;

[0009] Optionally, in the composition for smelting scale-inhibiting alloys, the mass percentages of Fe, Zn, Sn, and Ni are 22.6%, 24.0%, 15.2%, and 5.0%, respectively, with the balance being Cu;

[0010] Optionally, in the composition for smelting scale-inhibiting alloys, the mass percentages of Fe, Zn, Sn, and Ni are 14.6%, 22.4%, 16.1%, and 6.0%, respectively, with the balance being Cu;

[0011] Optionally, in the composition for smelting scale-inhibiting alloys, the mass percentages of Fe, Zn, Sn, and Ni are 28.0%, 25.5%, 13.6%, and 3.6%, respectively, with the balance being Cu;

[0012] Optionally, in the composition for smelting scale-inhibiting alloys, the mass percentages of Fe, Zn, Sn, and Ni are 22.9%, 25.8%, 14.7%, and 4.7%, respectively, with the balance being Cu.

[0013] In a second aspect, a scale-inhibiting alloy melting membrane is provided, wherein the scale-inhibiting alloy in the preparation of the scale-inhibiting alloy melting membrane is an alloy material containing Fe, Zn, Sn, Ni and Cu;

[0014] In the scale-inhibiting alloy, the mass percentage of Fe is 12%~29%, the mass percentage of Zn is 20%~25%, the mass percentage of Sn is 13%~16%, the mass percentage of Ni is 3%~6%, and the balance is Cu;

[0015] Optionally, in the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn, and Ni are 17.85%, 24.30%, 13.69%, and 3.82%, respectively, with the balance being Cu;

[0016] Optionally, in the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn, and Ni are 22.26%, 22.73%, 14.87%, and 4.59%, respectively, with the balance being Cu;

[0017] Optionally, in the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn, and Ni are 14.23%, 21.21%, 15.76%, and 5.55%, respectively, with the balance being Cu;

[0018] Optionally, in the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn, and Ni are 27.69%, 24.25%, 13.24%, and 3.23%, respectively, with the balance being Cu;

[0019] Optionally, in the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn and Ni are 22.61%, 24.52%, 14.37% and 4.28%, respectively, with the balance being Cu.

[0020] Optionally, the thickness of the scale-inhibiting alloy smelting film is 0.15 mm to 0.6 mm;

[0021] The scale inhibitor alloy contains needle-shaped grains, and in the scale inhibitor alloy smelting film, the angle between the length direction of each needle-shaped grain and the thickness direction of the scale inhibitor alloy smelting film is less than 20°.

[0022] Each of the said needle-like grains has a length of 5 μm to 280 μm and a width of 1 μm to 20 μm.

[0023] Thirdly, a method for preparing a scale-inhibiting alloy smelting film is provided, comprising:

[0024] Provide a composition for scale-inhibiting alloy smelting as described in the first aspect;

[0025] The scale inhibitor alloy smelting composition is processed using a strip spinning smelting process to prepare the scale inhibitor alloy smelting film.

[0026] Optionally, the composition for smelting the scale inhibitor alloy is processed using a strip spinning process to prepare the scale inhibitor alloy smelting film, comprising:

[0027] Remove moisture from each component of the composition for melting the scale-inhibiting alloy;

[0028] Under a protective atmosphere, Fe, Sn, Ni, and Cu, after moisture removal, are vacuum melted to obtain molten metallic materials.

[0029] The molten metal material is cooled down, and Zn after removing moisture is added to the cooled metal material and smelted until Zn melts to obtain the melt material of the scale inhibitor alloy composition.

[0030] The molten material is purified, and the purified molten material is cooled and shaped by a rotating cooling roller to obtain the scale-inhibiting alloy smelting film.

[0031] Optionally, the components in the scale-inhibiting alloy smelting composition are heated under vacuum to remove moisture, wherein the vacuum degree is 100 Pa to 200 Pa, the temperature is 100°C to 150°C, and the time is 15 min to 30 min; and / or,

[0032] The vacuum melting temperature is 1300℃~1600℃, and the gas pressure inside the cavity is 0.05 MPa~0.07 MPa; and / or,

[0033] The temperature of the cooled metal material is 800℃~900℃.

[0034] Optionally, before purifying the melt material, the process further includes: allowing the melt material to stand for 1.5 min to 3 min; and

[0035] Purifying the molten material includes:

[0036] The molten material is passed through an inclined guide plate in the strip melting device to purify it.

[0037] Optionally, when the purified molten material is cooled and shaped by a rotating cooling roller, the diameter of the cooling roller is 30 cm to 50 cm, the temperature of the cooling medium inside the cooling roller is 10°C to 20°C, and the rotation speed of the cooling roller is 2 m / min to 4 m / min.

[0038] Fourthly, a method for preparing scale-inhibiting alloy filter media is provided, comprising:

[0039] The scale-inhibiting alloy filter media is prepared by cutting the scale-inhibiting alloy smelting membrane sheet as described in the second aspect or the scale-inhibiting alloy smelting membrane sheet prepared by the preparation method as described in the third aspect.

[0040] Optionally, the scale-inhibiting alloy filter media is in sheet form, and the single-sided area of ​​the sheet-shaped scale-inhibiting alloy filter media is 0.2 cm². 2 ~1.5cm 2 .

[0041] The beneficial effects of the above-mentioned scale-inhibiting alloy smelting composition, filter media, smelting membrane, and preparation method are as follows:

[0042] In the scale inhibitor alloy smelting composition provided in this application embodiment, the nickel content is low and the iron content is relatively high, thereby reducing costs. By controlling the proportion of metal raw materials in the scale inhibitor alloy smelting composition within the aforementioned range, and preparing the scale inhibitor alloy filter media through a suitable process such as strip spinning, the grain refinement of the scale inhibitor alloy filter media can be effectively improved, resulting in no significant segregation in the filter media. Simultaneously, it can also impart superior corrosion resistance and scale inhibition properties to the filter media. Furthermore, strip spinning can further improve the recovery rate, thereby further reducing costs and solving the technical problem in related technologies where the high nickel content in scale inhibitor alloy filter media leads to high costs. Attached Figure Description

[0043] Figure 1 A schematic flowchart illustrating a method for preparing a scale-inhibiting alloy melting film provided in an embodiment of this application;

[0044] Figure 2 Metallographic diagram of the scale-inhibiting alloy filter media provided in Embodiment 1 of this application;

[0045] Figure 3 Metallographic diagram of the scale-inhibiting alloy filter media provided for Comparative Example 5 of this application. Detailed Implementation

[0046] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0047] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "exemplary," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0048] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and regions is enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched regions shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0049] In this document, terms such as "for example," "like," "example," and "exemplary" are used for descriptive purposes to indicate a connection in the coverage of different technical solutions presented earlier and later. However, they should not be construed as limitations on the preceding technical solution or as restrictions on the scope of protection outlined herein. Unless otherwise specified, in this document, A (e.g., B) indicates that B is a non-limiting example of A, and it can be understood that A is not limited to B.

[0050] In this article, "optionally," "optionally," and "optional" mean that something is optional, that is, it means that it is selected from either "with" or "without." If there are multiple "options" in a technical solution, unless otherwise specified, and there are no contradictions or mutual constraints, then each "option" is independent.

[0051] In this article, descriptions such as "optionally contains" and "optionally includes" indicate whether or not the component X is present. "Optional component X" indicates whether component X is present or absent, or whether or not component X is present.

[0052] In this document, the terms "first aspect," "second aspect," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or quantity, nor should they be construed as implicitly indicating the importance or quantity of the indicated technical features.

[0053] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0054] Unless otherwise defined, 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 application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0055] In this article, the technical features described in an open-ended manner include both closed technical solutions composed of the listed features and open technical solutions that include the listed features.

[0056] In this article, "at least one" means one or more, such as one, two or more. "Multiple" or "several" means at least two, such as two, three, etc.

[0057] In this document, when referring to numerical intervals (i.e., numerical ranges), unless otherwise specified, the distribution of selectable values ​​within a numerical interval is considered continuous, and includes the two endpoints (i.e., the minimum and maximum values) of the numerical interval, as well as every value between these two endpoints. Unless otherwise specified, when a numerical interval refers only to integers within that interval, it includes the two endpoint integers of the numerical range, as well as every integer between the two endpoints, which is equivalent to directly listing every integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be merged. In other words, unless otherwise specified, the numerical ranges disclosed herein should be understood to include any and all subranges included therein. The "numerical value" in this numerical interval can be any quantitative value, such as a number, percentage, ratio, etc. The term "numerical interval" can be broadly included to include percentage intervals, ratio intervals, proportion intervals, and other numerical interval types.

[0058] Unless otherwise specified, all percentage concentrations mentioned in this article refer to the final concentration. The final concentration refers to the proportion of the added ingredient in the system after the addition of that ingredient.

[0059] In this document, for methods involving multiple steps, unless otherwise explicitly stated herein, there is no strict order constraint on the execution of these steps; they may be executed in any order other than those described. Moreover, any step may include multiple sub-steps or multiple stages, which are not necessarily completed at the same time, but may be executed at different times, and their execution order is not necessarily sequential, but may be executed in turn, alternately, or simultaneously with other steps or parts of the sub-steps or stages of other steps.

[0060] To address the technical problem of high cost caused by high nickel content in scale-inhibiting alloy filter media in related technologies, the specific embodiments of this application are described as follows:

[0061] In a first aspect, some embodiments of this application provide a composition for smelting scale-inhibiting alloys, comprising metallic materials of Fe, Zn, Sn, Ni, and Cu. In the composition, Fe accounts for 12% to 29.5% by mass, Zn accounts for 20% to 28% by mass, Sn accounts for 13% to 16.5% by mass, Ni accounts for 3% to 6.5% by mass, and the balance is Cu.

[0062] The composition for smelting scale-inhibiting alloys can be used as a raw material to prepare scale-inhibiting alloy filter media.

[0063] For example, in the composition for scale-inhibiting alloy smelting, the mass percentage of Fe can be 12%, 13%, 14%, 16%, 18%, 20%, 23%, 25%, 27%, or 29.5%. In this case, the mass percentage of Zn can be 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, or 28%, the mass percentage of Sn can be 13%, 14%, 15%, or 16.5%, and the mass percentage of Ni can be 3%, 4%, 5%, or 6.5%. The sum of the mass percentages of Fe, Zn, Sn, Ni, and Cu is 100%.

[0064] In the scale inhibitor alloy smelting composition provided in this application embodiment, the nickel content is low and the iron content is relatively high, thereby reducing costs. By controlling the proportion of metal materials in the scale inhibitor alloy smelting composition within the aforementioned range, and preparing scale inhibitor alloy filter media through a suitable process such as strip spinning, the grain refinement of the scale inhibitor alloy filter media can be effectively improved, resulting in no significant segregation in the scale inhibitor alloy filter media. At the same time, it can also impart superior corrosion resistance and scale inhibition performance to the scale inhibitor alloy filter media. Furthermore, strip spinning can further improve the recovery rate, thereby further reducing costs and solving the technical problem in related technologies where the high nickel content in scale inhibitor alloy filter media leads to high costs.

[0065] In some embodiments, in the composition for scale-inhibiting alloy smelting, the mass percentages of Fe, Zn, Sn, and Ni are 18.2%, 25.5%, 14.0%, and 4.2%, respectively, with the balance being Cu; or,

[0066] In the composition for scale-inhibiting alloy smelting, the mass percentages of Fe, Zn, Sn, and Ni are 22.6%, 24.0%, 15.2%, and 5.0%, respectively, with the balance being Cu; or,

[0067] In the composition for scale-inhibiting alloy smelting, the mass percentages of Fe, Zn, Sn, and Ni are 14.6%, 22.4%, 16.1%, and 6.0%, respectively, with the balance being Cu; or,

[0068] In the composition for scale-inhibiting alloy smelting, the mass percentages of Fe, Zn, Sn, and Ni are 28.0%, 25.5%, 13.6%, and 3.6%, respectively, with the balance being Cu; or,

[0069] In the composition for scale-inhibiting alloy smelting, the mass percentages of Fe, Zn, Sn and Ni are 22.9%, 25.8%, 14.7% and 4.7%, respectively, with the balance being Cu.

[0070] Secondly, some embodiments of this application provide a scale-inhibiting alloy smelting membrane. The scale-inhibiting alloy used in preparing this smelting membrane is an alloy material comprising Fe, Zn, Sn, Ni, and Cu. In this scale-inhibiting alloy, the mass percentage of Fe is 12% to 29%, the mass percentage of Zn is 20% to 25%, the mass percentage of Sn is 13% to 16%, the mass percentage of Ni is 3% to 6%, and the balance is Cu.

[0071] The scale-inhibiting alloy smelting film can be obtained by smelting a scale-inhibiting alloy smelting composition. The scale-inhibiting alloy smelting composition can be a metallic material containing Fe, Zn, Sn, Ni, and Cu. Specifically, in the scale-inhibiting alloy smelting composition, the mass percentage of Fe is 12%–29.5%, the mass percentage of Zn is 20%–28%, the mass percentage of Sn is 13%–16.5%, the mass percentage of Ni is 3%–6.5%, and the balance is Cu.

[0072] In the scale inhibitor alloy smelting membrane provided in this application embodiment, the scale inhibitor alloy used to prepare the membrane is an alloy material containing Fe, Zn, Sn, Ni, and Cu. In this scale inhibitor alloy, the mass percentage of Fe is 12%~29%, Zn is 20%~25%, Sn is 13%~16%, Ni is 3%~6%, and the balance is Cu. Therefore, the nickel content in this scale inhibitor alloy is low. Preparing a scale inhibitor alloy smelting membrane with Fe partially replacing Ni can reduce costs. Furthermore, through appropriate processes, the corrosion resistance and recovery rate of the scale inhibitor alloy smelting membrane can be improved, thereby further reducing costs.

[0073] In some embodiments, in the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn, and Ni are 17.85%, 24.30%, 13.69%, and 3.82%, respectively, with the balance being Cu; or,

[0074] In the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn, and Ni are 22.26%, 22.73%, 14.87%, and 4.59%, respectively, with the balance being Cu; or,

[0075] In the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn, and Ni are 14.23%, 21.21%, 15.76%, and 5.55%, respectively, with the balance being Cu; or,

[0076] In the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn, and Ni are 27.69%, 24.25%, 13.24%, and 3.23%, respectively, with the balance being Cu; or,

[0077] In the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn and Ni are 22.61%, 24.52%, 14.37% and 4.28%, respectively, with the balance being Cu.

[0078] In some embodiments, the thickness of the scale inhibitor alloy melt film is 0.15 mm to 0.6 mm; the grains in the scale inhibitor alloy are needle-shaped grains, and the angle between the length direction of each needle-shaped grain and the thickness direction of the scale inhibitor alloy melt film is less than 20°; the length of each needle-shaped grain is 5 μm to 280 μm, and the width is 1 μm to 20 μm.

[0079] The length of each needle-like grain is 5μm to 280μm, meaning that the lengths of multiple needle-like grains are not uniform, with the smallest reaching 5μm and the largest reaching 280μm. In different scale inhibitor alloy smelting films, the average length of multiple needle-like grains can be 120μm to 140μm. For example, in the same scale inhibitor alloy smelting film, the average length of multiple needle-like grains can be any value between 120μm and 140μm. In different scale inhibitor alloy smelting films, the average length of multiple needle-like grains is related to the preparation process conditions. Similarly, the width of each needle-like grain is 1μm to 20μm, meaning that the width of multiple needle-like grains is not uniform, with a minimum of 1μm and a maximum of 20μm. Similar to the length of multiple needle-like grains, in the same scale inhibitor alloy melting film, the average width of multiple needle-like grains can be any value between 2μm and 6μm. For different scale inhibitor alloy melting films, the average width of multiple needle-like grains will also vary depending on their process parameters.

[0080] In these embodiments, the scale-inhibiting alloy smelted membrane has a suitable thickness, which imparts a finer grain size to the scale-inhibiting alloy and reduces inclusions and segregation in the alloy, thereby improving the scale inhibition rate and activation current of the scale-inhibiting alloy filter media. Simultaneously, since the grains in the scale-inhibiting alloy are needle-shaped, multiple needle-shaped grains tend to align perpendicular to the thickness direction of the membrane, and the angle between the length direction of each needle-shaped grain and the thickness direction of the membrane is less than 20°. Therefore, the scale-inhibiting alloy exhibits a more pronounced crystal orientation, thereby increasing grain anisotropy and further improving the activation current and scale inhibition performance of the filter media.

[0081] Thirdly, some embodiments of this application provide a method for preparing a scale-inhibiting alloy smelting film, such as... Figure 1 As shown, the preparation method includes steps S11) to S12).

[0082] S11) Provide a composition for scale-inhibiting alloy smelting as described in the first aspect.

[0083] S12) The composition for scale inhibitor alloy smelting is processed by a strip spinning process to prepare a scale inhibitor alloy smelting film.

[0084] In some embodiments, the scale inhibitor alloy smelting composition is processed using a strip spinning process to prepare a scale inhibitor alloy smelting film, which may include:

[0085] S121) Remove moisture from each component of the composition for smelting scale-inhibiting alloys;

[0086] For example, a vacuum oven can be used to remove moisture from the components.

[0087] S122) Under a protective atmosphere, Fe, Sn, Ni and Cu after moisture removal are vacuum melted to obtain molten metal material;

[0088] S123) Cool the molten metal material and add the dehydrated Zn to the cooled metal material and continue to melt until Zn melts to obtain the melt material of the scale inhibitor alloy composition;

[0089] S124) The molten material is purified, and the purified molten material is cooled and shaped by a rotating cooling roller to obtain a scale-inhibiting alloy smelting film.

[0090] In these embodiments, by removing moisture from Fe, Sn, Ni, Cu, and Zn, and then melting the moisture-removed Fe, Sn, Ni, and Cu, a molten Fe, Sn, Ni, and Cu metal mixture is obtained. The molten Fe, Sn, Ni, and Cu metal mixture is then cooled, and moisture-removed Zn is added to the cooled Fe, Sn, Ni, and Cu metal mixture. This facilitates the mutual melting of Zn with Fe, Sn, Ni, and Cu at a lower temperature, reducing Zn vaporization loss. Finally, by purifying the molten material and cooling and shaping it using a rotating cooling roller, a scale-inhibiting alloy molten membrane is obtained. The thickness of this scale-inhibiting alloy molten membrane can be controlled by adjusting the rotation speed of the cooling roller, thereby controlling the thickness and grain size of the scale-inhibiting alloy, resulting in a scale-inhibiting alloy filter material with a high degree of grain refinement.

[0091] In this process, by performing strip melting under a protective atmosphere, oxidation during the melting process can be reduced, thereby reducing inclusions and segregation in the scale inhibitor alloy, improving the recovery rate of the scale inhibitor alloy filter media, and further reducing costs. Simultaneously, metallographic analysis of the scale inhibitor alloy smelted membrane revealed that the scale inhibitor alloy grains are needle-shaped, and multiple needle-shaped grains tend to align perpendicular to the thickness direction of the smelted membrane. Furthermore, the angle between the length direction of each needle-shaped grain and the thickness direction of the smelted membrane is less than 20°. This indicates that the scale inhibitor alloy grains in the smelted membrane have a significant crystal orientation, which can improve the anisotropy of the scale inhibitor alloy grains. This anisotropy significantly improves the activation current of the scale inhibitor alloy filter media, thereby further increasing the scale inhibition rate of the filter media.

[0092] In some embodiments, S121), the components in the composition for melting scale-inhibiting alloy are heated by vacuum heating to remove moisture. The vacuum degree of vacuum heating is 100 Pa to 200 Pa, the temperature is 100°C to 150°C, and the time is 15 min to 30 min.

[0093] In some embodiments, S122), the temperature of vacuum melting is 1300°C to 1600°C, and the gas pressure inside the cavity is 0.05 MPa to 0.07 MPa.

[0094] In some embodiments, the temperature of the cooled metal material is 800°C to 900°C.

[0095] In some embodiments, before purifying the melt material, the process further includes: allowing the melt material to stand for 1.5 to 3 minutes; and

[0096] Purification of the molten material includes:

[0097] The molten material flows through the inclined guide plate in the belt spinning melting device, and the inclined guide plate is used to purify the molten material.

[0098] In these embodiments, the purification effect of the melt material can be improved, thereby further reducing inclusions and segregation in the scale-inhibiting alloy.

[0099] In some embodiments, when the purified melt material is cooled and shaped by a rotating cooling roller, the diameter of the cooling roller is 30 cm to 50 cm, the temperature of the cooling medium inside the cooling roller is 10°C to 20°C, and the rotation speed of the cooling roller is 2 m / min to 4 m / min.

[0100] In these embodiments, the thickness and grain size of the scale-inhibiting alloy membrane can be controlled to obtain a scale-inhibiting alloy filter media with a high degree of refinement, thereby improving the scale inhibition rate of the scale-inhibiting alloy filter media.

[0101] Fourthly, some embodiments of this application provide a method for preparing scale-inhibiting alloy filter media, the method comprising:

[0102] The scale-inhibiting alloy filter media is prepared by cutting the scale-inhibiting alloy smelting membrane sheet as described in the second aspect or the scale-inhibiting alloy smelting membrane sheet prepared by the preparation method described in the third aspect.

[0103] In the preparation method of scale-inhibiting alloy filter media provided in the embodiments of this application, scale-inhibiting alloy filter media of the required size and shape can be prepared by cutting the scale-inhibiting alloy smelting membrane sheet as described in the second aspect or the scale-inhibiting alloy smelting membrane sheet prepared by the preparation method as described in the third aspect. The preparation method is simple and convenient.

[0104] In some embodiments, a cutting machine may be used to cut the scale-inhibiting alloy melt film as described in the second aspect or the scale-inhibiting alloy melt film prepared by the preparation method as described in the third aspect.

[0105] In some embodiments, the scale-inhibiting alloy filter media is in sheet form;

[0106] In these embodiments, the scale-inhibiting alloy filter media can be obtained by shearing the aforementioned scale-inhibiting alloy smelted membrane, wherein the needle-like grains have the same characteristics as the needle-like grains in the aforementioned scale-inhibiting alloy smelted membrane.

[0107] In some embodiments, the sheet-like scale-inhibiting alloy filter media can be a regular shape such as rectangle, circle, or square, or any other possible irregular shape, and the single-sided area of ​​the sheet-like scale-inhibiting alloy filter media can be 0.2 cm². 2 ~1.5cm 2 .

[0108] The single-sided area of ​​the sheet-shaped scale-inhibiting alloy filter media refers to the area of ​​any one surface of the sheet-shaped scale-inhibiting alloy filter media located on one side of its thickness direction.

[0109] In these embodiments, the scale-inhibiting alloy filter media has a high scale inhibition rate, as well as high corrosion resistance and recovery rate.

[0110] In order to objectively evaluate the technical effects of the embodiments of this application, this application will be described in detail by way of example through the following embodiments and comparative examples.

[0111] In the following examples and comparative examples, all raw materials were commercially available, and to maintain the reliability of the experiments, the raw materials used in the following examples and comparative examples had the same physical and chemical parameters or were prepared by the same processing method.

[0112] Example 1

[0113] The preparation method of the scale-inhibiting alloy filter media provided in Example 1 is as follows:

[0114] Step (1): Remove the surface oxide scale from the metal raw materials of the scale inhibitor alloy smelting composition. The metal raw materials after removing the oxide scale are used to prepare scale inhibitor alloy filter media according to the following proportions: Fe 18.2% by mass, Zn 25.5% by mass, Sn 14.0% by mass, Ni 4.2% by mass, and Cu as the balance.

[0115] Step (2): Place the Fe, Sn, Ni, Cu and Zn in the metal raw materials into a vacuum oven and dry them. The vacuum degree of the oven is 200 Pa, the heating temperature is 120℃, and the holding time is 20 min.

[0116] Step (3): Place the dried Fe, Sn, Ni, and Cu from the scale-inhibiting alloy smelting composition into the crucible of the vacuum smelting furnace, and place Zn into the secondary feeding hopper;

[0117] Step (4): Evacuate the cavity to 2 Pa, then fill the cavity with argon protective gas until the pressure inside the cavity is 0.06 MPa, and raise the temperature to 1550℃ to melt all the metal materials in the crucible. Then cool down to 830℃ and add Zn.

[0118] Step (5): After Zn is completely melted and left to stand for 2 minutes, tilt the crucible so that the melt material flows from the crucible through the inclined guide plate of the tundish and flows onto the water-cooled copper roller. The diameter of the copper roller is 40 cm, the rotation speed is 3 m / min, and the temperature of the cooling water in the copper roller is 15 °C. The rotating copper roller makes the melt material cool down quickly and throw it into the collector to obtain the scale inhibitor alloy melting film.

[0119] Step (6): Cut the scale inhibitor alloy smelting film using a cutting machine to obtain a single-sided area of ​​1 cm². 2 Left and right sheet-like scale-inhibiting alloy filter media.

[0120] Example 2

[0121] The preparation method of the scale-inhibiting alloy filter media provided in Example 2 is basically the same as that of the scale-inhibiting alloy filter media provided in Example 1, with the only difference being:

[0122] The composition of the metal raw materials in step (1) is as follows: Fe accounts for 22.6% of the mass, Zn accounts for 24.0% of the mass, Sn accounts for 15.2% of the mass, Ni accounts for 5.0% of the mass, and the balance is Cu.

[0123] Example 3

[0124] The preparation method of the scale-inhibiting alloy filter media provided in Example 3 is basically the same as that of the scale-inhibiting alloy filter media provided in Example 1, with the only difference being:

[0125] The composition of the metal raw materials in step (1) is as follows: Fe accounts for 14.6% of the mass, Zn accounts for 22.4% of the mass, Sn accounts for 16.1% of the mass, Ni accounts for 6.0% of the mass, and the balance is Cu.

[0126] Example 4

[0127] The preparation method of the scale-inhibiting alloy filter media provided in Example 4 is basically the same as that of the scale-inhibiting alloy filter media provided in Example 1, with the only difference being:

[0128] The composition of the metal raw materials in step (1) is as follows: Fe accounts for 28.0% of the mass, Zn accounts for 25.5% of the mass, Sn accounts for 13.6% of the mass, Ni accounts for 3.6% of the mass, and the balance is Cu.

[0129] Example 5

[0130] The preparation method of the scale-inhibiting alloy filter media provided in Example 5 is basically the same as that of the scale-inhibiting alloy filter media provided in Example 1, with the only difference being:

[0131] The composition of the metal raw materials in step (1) is as follows: Fe accounts for 22.9% of the mass, Zn accounts for 25.8% of the mass, Sn accounts for 14.7% of the mass, Ni accounts for 4.7% of the mass, and the balance is Cu.

[0132] Comparative Example 1

[0133] The preparation method of the scale-inhibiting alloy filter media provided in Comparative Example 1 is basically the same as that of the scale-inhibiting alloy filter media provided in Example 1, with the only difference being:

[0134] The composition of the metal raw materials in step (1) is as follows: Fe accounts for 32.5% of the mass, Zn accounts for 26.0% of the mass, Sn accounts for 14.3% of the mass, Ni accounts for 4.5% of the mass, and the balance is Cu.

[0135] Comparative Example 2

[0136] The preparation method of the scale-inhibiting alloy filter media provided in Comparative Example 2 is basically the same as that of the scale-inhibiting alloy filter media provided in Example 1, with the only difference being:

[0137] The composition of the metal raw materials in step (1) is as follows: Fe accounts for 11.1% of the mass, Zn accounts for 25.2% of the mass, Sn accounts for 15.0% of the mass, Ni accounts for 4.7% of the mass, and the balance is Cu.

[0138] Comparative Example 3

[0139] The preparation method of the scale-inhibiting alloy filter media provided in Comparative Example 3 is basically the same as that of the scale-inhibiting alloy filter media provided in Example 1, with the only difference being:

[0140] The composition of the metal raw materials in step (1) is as follows: Fe accounts for 23.5% of the mass, Zn accounts for 25.3% of the mass, Sn accounts for 18.0% of the mass, Ni accounts for 4.5% of the mass, and the balance is Cu.

[0141] Comparative Example 4

[0142] The preparation method of the scale-inhibiting alloy filter media provided in Comparative Example 4 is basically the same as that of the scale-inhibiting alloy filter media provided in Example 1, with the only difference being:

[0143] The composition of the metal raw materials in step (1) is as follows: Fe accounts for 22.4% of the mass, Zn accounts for 25.8% of the mass, Sn accounts for 12.1% of the mass, Ni accounts for 4.6% of the mass, and the balance is Cu.

[0144] Comparative Example 5

[0145] The scale-inhibiting alloy filter material provided in Comparative Example 5 was prepared by atmospheric melting and turning processes, and the composition of the metal raw materials in step (1) was: Fe accounted for 23.1% by mass, Zn accounted for 26.0% by mass, Sn accounted for 15.0% by mass, Ni accounted for 5.4% by mass, and the balance was Cu.

[0146] Comparative Example 6

[0147] The scale-inhibiting alloy filter material provided in Comparative Example 6 was prepared by atmospheric melting and turning processes, and the composition of the metal raw materials in step (1) was: Fe accounted for 5.8% by mass, Zn accounted for 26.0% by mass, Sn accounted for 15.0% by mass, Ni accounted for 15.0% by mass, and the balance was Cu.

[0148] Test case

[0149] 1. The metallographic structure of the scale-inhibiting alloy filter media provided in Example 1 and Comparative Example 5 was observed using a metallographic microscope, and the metallographic structures are shown below. Figure 2 and Figure 3 As shown.

[0150] Compare Figure 2 and Figure 3 It can be seen that the scale-inhibiting alloy filter material provided in this application has a high degree of grain refinement and high anisotropy. For example, from Figure 2 It can be seen that the scale-inhibiting alloy grains in the scale-inhibiting alloy filter media provided in this application are needle-shaped grains. The arrangement of multiple needle-shaped grains tends to be perpendicular to the thickness direction of the scale-inhibiting alloy filter media, and the angle between the length direction of each needle-shaped grain and the thickness direction of the scale-inhibiting alloy smelting film is relatively small, extending essentially along the thickness direction of the scale-inhibiting alloy smelting film. Furthermore, the main phase and grain boundary phase of the scale-inhibiting alloy in the scale-inhibiting alloy filter media provided in this application embodiment are uniformly fine and show no obvious segregation. And from... Figure 3 It can be seen that the scale-inhibiting alloy grains in the scale-inhibiting alloy filter media provided in Comparative Example 5 are relatively coarse and do not have obvious anisotropy.

[0151] 2. The scale-inhibiting alloy filter media provided in Examples 1-5 and Comparative Examples 1-6 were loaded into filter tanks with equal mass and connected to the circulating water device respectively. The flow rate was set to 8L / min. The ohmmeter was adjusted to the μA range, with the positive electrode connected to the filter tank containing the scale-inhibiting alloy filter media and the distance between the negative electrode and the positive electrode being 20cm. The value of the ohmmeter 10 minutes after the circulating water was turned on was taken as the magnitude of the activation current. The specific test results are shown in Table 1 below.

[0152] 3. The scale-inhibiting alloy filter media provided in Examples 1-5 and Comparative Examples 1-6 were dried under the same conditions, cooled, weighed to the same weight, and placed into filter tanks. They were then connected to a 5wt% sodium chloride circulating water device. The flow rate of the 5wt% sodium chloride circulating water was set to 8L / min. When the flow rate was 200m³, the scale-inhibiting alloy filter media provided in each example and comparative example were taken out, washed with pure water, dried, cooled, and weighed after testing. The weight loss rate of the scale-inhibiting alloy filter media provided in each example and comparative example was calculated as the corrosion resistance evaluation index. The specific test results are shown in Table 1 below.

[0153] 4. The scale-inhibiting alloy filter media provided in Examples 1-5 and Comparative Examples 1-6 were used to prepare filter cartridges of the same specifications. Test water with a total hardness of 350 mg / L and a total alkalinity of 160 mg / L was prepared using pure water, anhydrous calcium chloride, and sodium bicarbonate. The test water was flowed through the filter cartridges with scale-inhibiting alloy filter media at a rate of 6 L / min. Water samples were obtained after 10 min. The scale inhibition performance of the scale-inhibiting alloy filter media provided in each example and comparative example was tested according to GB / T 16631-2019. The test results are shown in Table 1 below.

[0154] 5. Weigh the scale-inhibiting alloy filter media provided in Examples 1-5 and Comparative Examples 1-6 by weight m1, and calculate the recovery rate of the scale-inhibiting alloy filter media in each example and comparative example by dividing the weight m1 by the weight m2 of the raw materials input in the corresponding example and comparative example. The calculation results are shown in Table 1 below.

[0155] Table 1

[0156]

[0157] As shown in Table 1, under the same atmosphere protection and strip melting conditions, the scale-inhibiting alloy filter media provided in Examples 1-5 have significantly higher recovery rates. High levels of iron do not cause a large corrosion loss rate of the scale-inhibiting alloy filter media. Under the strengthening effect of the anisotropy of oriented crystal grains, the activation current and scale inhibition rate of the scale-inhibiting alloy filter media are significantly improved.

[0158] Compared with Examples 1-5 and Comparative Examples 1-6, the scale-inhibiting alloy filter media prepared by the atmosphere-protected belt spinning process has a significantly higher recovery rate.

[0159] Comparing Examples 1-5 with Comparative Example 1, it can be seen that when the Fe content is too high, the corrosion resistance is poor.

[0160] Comparing Examples 1-5 with Comparative Example 2, it can be seen that when the Fe content is too low, the activation current is smaller and the scale inhibition rate becomes lower.

[0161] Comparing Examples 1-5 with Comparative Example 3, it can be seen that when the Sn content is too high, the material is brittle and breaks during cutting, resulting in a low recovery rate.

[0162] Comparing Examples 1-5 with Comparative Example 4, it can be seen that when the Sn content is too low, the activation current is smaller and the scale inhibition rate becomes lower.

[0163] Comparing Example 5 and Comparative Example 5, it can be seen that when atmospheric melting is used, the recovery rate, activation current, scale inhibition rate are all lower, and the corrosion resistance is worse.

[0164] Comparing Comparative Example 6 with Comparative Example 5, it can be seen that when using alloys with high Ni content smelted in the atmosphere, although the corrosion loss rate is <15%, the recovery rate is low.

[0165] In summary, the embodiments of this application can prepare scale-inhibiting alloy filter media with a high tendency for oriented crystallization and high grain anisotropy. The activation current increases with the increase of material anisotropy. Furthermore, the use of atmosphere-protected strip melting process reduces inclusions, segregation, and oxidation in the scale-inhibiting alloy filter media, allowing the scale-inhibiting alloy filter media to be directly cut from scale-inhibiting alloy melting membranes, resulting in high recovery rate and low cost. In addition, the scale-inhibiting alloy filter media provided by the embodiments of this application has a high degree of grain refinement, which can improve the activation current and scale inhibition rate of the scale-inhibiting alloy filter media. Moreover, by using iron instead of nickel and refining the grains through strip melting, the cost of raw materials can be reduced without sacrificing corrosion resistance.

[0166] It is evident that the scale-inhibiting alloy filter material provided in this application embodiment has advantages such as low cost, strong corrosion resistance, and high comprehensive performance levels including scale inhibition rate and activation current.

[0167] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0168] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A composition for smelting scale-inhibiting alloys, characterized in that, The composition for smelting scale-inhibiting alloys includes metallic materials of Fe, Zn, Sn, Ni, and Cu; In the composition for smelting scale-inhibiting alloys, the mass percentage of Fe is 12% to 29.5%, the mass percentage of Zn is 20% to 28%, the mass percentage of Sn is 13% to 16.5%, the mass percentage of Ni is 3% to 6.5%, and the balance is Cu.

2. The composition for scale-inhibiting alloy smelting according to claim 1, characterized in that, In the composition for smelting scale-inhibiting alloys, the mass percentages of Fe, Zn, Sn, and Ni are 18.2%, 25.5%, 14.0%, and 4.2%, respectively, with the balance being Cu.

3. The composition for scale-inhibiting alloy smelting according to claim 1, characterized in that, In the composition for smelting scale-inhibiting alloys, the mass percentages of Fe, Zn, Sn, and Ni are 22.6%, 24.0%, 15.2%, and 5.0%, respectively, with the balance being Cu.

4. The composition for scale-inhibiting alloy smelting according to claim 1, characterized in that, In the composition for smelting scale-inhibiting alloys, the mass percentages of Fe, Zn, Sn, and Ni are 14.6%, 22.4%, 16.1%, and 6.0%, respectively, with the balance being Cu.

5. The composition for scale-inhibiting alloy smelting according to claim 1, characterized in that, In the composition for smelting scale-inhibiting alloys, the mass percentages of Fe, Zn, Sn, and Ni are 28.0%, 25.5%, 13.6%, and 3.6%, respectively, with the balance being Cu.

6. The composition for scale-inhibiting alloy smelting according to claim 1, characterized in that, In the composition for smelting scale-inhibiting alloys, the mass percentages of Fe, Zn, Sn, and Ni are 22.9%, 25.8%, 14.7%, and 4.7%, respectively, with the balance being Cu.

7. A scale-inhibiting alloy smelting diaphragm, characterized in that, The scale-inhibiting alloy used in preparing the scale-inhibiting alloy smelting film is an alloy material containing Fe, Zn, Sn, Ni and Cu; In the scale-inhibiting alloy, the mass percentage of Fe is 12%~29%, the mass percentage of Zn is 20%~25%, the mass percentage of Sn is 13%~16%, the mass percentage of Ni is 3%~6%, and the balance is Cu.

8. The scale-inhibiting alloy smelting diaphragm according to claim 7, characterized in that, In the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn and Ni are 17.85%, 24.30%, 13.69% and 3.82%, respectively, with the balance being Cu.

9. The scale-inhibiting alloy smelting diaphragm according to claim 7, characterized in that, In the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn and Ni are 22.26%, 22.73%, 14.87% and 4.59%, respectively, with the balance being Cu.

10. The scale-inhibiting alloy smelting diaphragm according to claim 7, characterized in that, In the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn and Ni are 14.23%, 21.21%, 15.76% and 5.55%, respectively, with the balance being Cu.

11. The scale-inhibiting alloy smelting diaphragm according to claim 7, characterized in that, In the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn and Ni are 27.69%, 24.25%, 13.24% and 3.23%, respectively, with the balance being Cu.

12. The scale-inhibiting alloy smelting diaphragm according to claim 7, characterized in that, In the scale-inhibiting alloy, the mass percentages of Fe, Zn, Sn and Ni are 22.61%, 24.52%, 14.37% and 4.28%, respectively, with the balance being Cu.

13. The scale-inhibiting alloy smelting diaphragm according to claim 7, characterized in that, The thickness of the scale-inhibiting alloy smelting film is 0.15mm~0.6mm; The scale inhibitor alloy contains needle-shaped grains, and in the scale inhibitor alloy smelting film, the angle between the length direction of each needle-shaped grain and the thickness direction of the scale inhibitor alloy smelting film is less than 20°. Each of the needle-like grains has a length of 5 μm to 280 μm and a width of 1 μm to 20 μm.

14. A method for preparing a scale-inhibiting alloy smelting diaphragm, characterized in that, include: Provide a composition for smelting scale-inhibiting alloys as described in any one of claims 1 to 6; The scale inhibitor alloy smelting composition is processed using a strip spinning smelting process to prepare the scale inhibitor alloy smelting film.

15. The preparation method according to claim 14, characterized in that, The scale inhibitor alloy smelting composition is processed using a strip spinning smelting process to prepare the scale inhibitor alloy smelting film, comprising: Remove moisture from each component of the composition for melting the scale-inhibiting alloy; Under a protective atmosphere, Fe, Sn, Ni, and Cu, after moisture removal, are vacuum melted to obtain molten metallic materials. The molten metal material is cooled down, and Zn after removing moisture is added to the cooled metal material and smelted until Zn melts to obtain the melt material of the scale inhibitor alloy composition. The molten material is purified, and the purified molten material is cooled and shaped by a rotating cooling roller to obtain the scale-inhibiting alloy smelting film.

16. The preparation method according to claim 15, characterized in that, The components of the scale-inhibiting alloy smelting composition are heated under vacuum to remove moisture, wherein the vacuum degree is 100 Pa to 200 Pa, the temperature is 100 °C to 150 °C, and the time is 15 min to 30 min; and / or, The vacuum melting temperature is 1300℃~1600℃, and the gas pressure inside the cavity is 0.05MPa~0.07MPa; and / or, The temperature of the cooled metal material is 800℃~900℃.

17. The preparation method according to claim 15, characterized in that, Before purifying the molten material, the process further includes: allowing the molten material to stand for 1.5 min to 3 min; and Purifying the molten material includes: The molten material is passed through an inclined guide plate in the strip melting device to purify it.

18. The preparation method according to claim 15, characterized in that, When the purified molten material is cooled and shaped by a rotating cooling roller, the diameter of the cooling roller is 30cm to 50cm, the temperature of the cooling medium inside the cooling roller is 10℃ to 20℃, and the rotation speed of the cooling roller is 2m / min to 4m / min.

19. A method for preparing a scale-inhibiting alloy filter media, characterized in that, include: The scale-inhibiting alloy smelting membrane sheet prepared according to any one of claims 7 to 13 or the preparation method according to any one of claims 14 to 18 is cut to prepare the scale-inhibiting alloy filter material.

20. The preparation method according to claim 19, characterized in that, The scale-inhibiting alloy filter media is in sheet form, and the single-sided area of ​​the sheet-shaped scale-inhibiting alloy filter media is 0.2 cm². 2 ~1.5cm 2 .

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