CN109632725B - Method for quickly determining proportion of lubricating oil filter aid for aluminum rolling - Google Patents
Method for quickly determining proportion of lubricating oil filter aid for aluminum rolling Download PDFInfo
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- CN109632725B CN109632725B CN201811522806.1A CN201811522806A CN109632725B CN 109632725 B CN109632725 B CN 109632725B CN 201811522806 A CN201811522806 A CN 201811522806A CN 109632725 B CN109632725 B CN 109632725B
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- light transmittance
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- 238000000034 method Methods 0.000 title claims abstract description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 16
- 238000005096 rolling process Methods 0.000 title claims abstract description 13
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 46
- 238000002834 transmittance Methods 0.000 claims abstract description 34
- 239000003921 oil Substances 0.000 claims abstract description 20
- 230000008859 change Effects 0.000 claims abstract description 19
- 239000010731 rolling oil Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000003828 vacuum filtration Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims abstract description 5
- 239000012065 filter cake Substances 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 238000013329 compounding Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000000843 powder Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 235000011128 aluminium sulphate Nutrition 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
Landscapes
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Filtering Materials (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention belongs to the technical field of aluminum material preparation, and particularly relates to a method for quickly determining the proportion of a lubricating oil filter aid for aluminum rolling. The method comprises the following steps: filter aid is made into filter medium according to different contents, and the filter medium is mixed with rolling oil with 100 percent of light transmittance to form a precoating layer in a vacuum filtration device, and the thickness of the precoating layer is controlled; mixing a filter medium and dirty oil, slowly pouring the mixture into a filter cup for filtering, controlling the filtering pressure in the filtering process, recording the filtering time, and detecting the light transmittance by using a spectrophotometer after the filtered clean oil is filtered; the compounding ratio is determined by the filtration time and the degree of the percent change in light transmittance. The method has simple and easy steps, can effectively and quickly determine the proportion of the filter aid, and has important guidance for determining the proportion of the filter aid in actual production.
Description
Technical Field
The invention belongs to the technical field of aluminum material preparation, and particularly relates to a method for quickly determining the proportion of a lubricating oil filter aid for aluminum rolling.
Background
In the aluminum product rolling process, rolling oil not only plays roles such as lubrication, washing, cooling, dust that falls into in oxide, aluminium bits and the air that produces moreover all can be taken away by rolling oil, if rolling oil can not get effective filtration, then along with rolling going on, the pollution of oil will be more and more serious, and then seriously influence the quality of product, consequently must carry out effectual filtration to rolling oil. At present, most manufacturers filter the rolling oil with plate filters, which are implemented with the aid of a filter medium and a filter aid. The filter medium is filter paper, and the filter paper needs to bear filter cakes, so the filter paper not only needs to have certain porosity, but also needs to have certain strength. Certain voidage ensures that rolling oil passes through but filter aid particles cannot leak, and certain strength ensures that the cracking phenomenon does not occur in the filtering and cleaning processes. In the filtration operation, an auxiliary powder-like substance, called a filter aid, is added to increase the filtration rate or to obtain a highly clarified filtrate in order to reduce the filtration resistance. Filter aids which are commonly used are activated clay, diatomaceous earth, bentonite, activated carbon, activated alumina, sawdust, or lignocellulose. The filter aid for aluminum rolling enterprises is generally formed by combining two or more substances (filtering action and adsorption action) of the substances. The mechanical filtration effect of the filter cake and the adsorption effect of the active substances can keep the rolling oil clean, so that the addition amount of various filter aids is required to be in a certain proportion, different proportions and different filtration effects. The greater the proportion of active substance, the slower the filtration time. The actual amount added will also vary depending on the quality of the various filter aids used. In addition, the proportion of the filter aid should be different in consideration of different oil filtration precisions (both meeting production requirements and saving requirements) required by different rolling mills. In actual production, the type and the proportion of the filter aid can only be determined according to the prior production experience, field production test or the experience of other manufacturers, so that the filter aid not only needs long time and has low efficiency, but also is not necessarily the optimal proportion. Therefore, a method for effectively and quickly determining the proportion of the aluminum rolling lubricating oil filter aid is lacked in the actual production.
Disclosure of Invention
The invention aims to provide a method for quickly determining the proportion of a lubricating oil filter aid for aluminum rolling; the method has the advantages of simple and easy steps, capability of effectively and quickly determining the proportion of the filter aid and important guidance for determining the proportion of the filter aid in actual production.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for quickly determining the proportion of a filter aid for aluminum rolling lubricating oil comprises the following steps: filter aid is formed into filter medium according to different contents, and a precoating layer is formed in a vacuum filtration device, and the thickness of the precoating layer is controlled. Mixing a small amount of filter medium with dirty oil at the same ratio, slowly pouring into a filter cup for filtering, controlling the filter pressure in the filtering process, recording the filtering time, and detecting the light transmittance by using a spectrophotometer after the filtered clean oil is filtered. The compounding ratio is determined by the filtration time and the degree of the percent change in light transmittance.
The method comprises the following specific steps:
(1) designing a test scheme: different filter aids and content ranges are selected, and the test scheme is designed according to orthogonal experiments.
(2) Preparation: according to the test scheme, different filter aids are respectively weighed by an electronic analytical balance, stirred and mixed into filter media with different weight ratios, and the filter media are respectively poured into beakers.
(3) Preparing a precoat layer: sleeving a non-woven filter cloth (the size is determined according to an actual vacuum filtration device) on a filter element of a filter cup of the vacuum filtration device for later use; weighing 3.8-4.2 g of the mixed filter medium, mixing with 40-60 ml of rolling oil with 100% of light transmittance, uniformly stirring, and slowly pouring into a filter cup along a glass rod to form a precoated filter cake with a certain thickness (determined according to the thickness of the filter cake of an actual production filter system).
(4) And (3) filtering: weighing 0.5g of mixed filter medium, mixing with 50ml of dirty oil, stirring for several minutes (determined according to the flow time of rolling oil of an actual production filter system), pouring 100-200 ml/min into a filter cup along a glass rod, starting a vacuum pump after all the oil is poured, controlling the vacuum pressure at 200mmHg, and recording the finish time of suction to explain the filtering speed.
(5) The filtration capacity was demonstrated by measuring the transmittance of the filtered neat oil using a type 722 spectrophotometer and calculating the percent change in transmittance.
(6) The percentage change of light transmittance and the filtration time are compared to determine the filter aid ratio. The shorter the oil pumping filtration time is, the higher the filtration efficiency is; the greater the percent change in transmittance, the greater the filtration capacity.
(7) Selecting the filter aid ratio with the maximum percentage of light transmittance change; when the percentage change of light transmittance is maximum and the filtration time is longest, the proportion of the filter aid with the percentage change of light transmittance being less than the maximum is selected.
The invention has the following remarkable advantages: the method has simple and easy steps, can effectively and quickly determine the proportion of the filter aid, and has important guidance for determining the proportion of the filter aid in actual production.
Detailed Description
For further disclosure, but not limitation, the present invention is described in further detail below with reference to examples.
Example 1
(1) Designing a test scheme: different filter aids (aluminum slag fine powder, broken straw stalks and oxidation tank micro powder) and content ranges are selected, and a test scheme is designed according to a factor level table (the mixture ratio is detailed in table 1).
(2) Preparation: according to the test scheme, different filter aids are respectively weighed by an electronic analytical balance, stirred and mixed into filter media with different weight ratios, and the filter media are respectively poured into beakers.
(3) Preparing a precoat layer: sleeving a phi 50mm non-woven filter cloth on a filter element of a phi 50mm filter cup of a vacuum filtration device for later use. 4.0g of the mixed filter medium is weighed, poured into a beaker filled with 50ml of rolling oil with 100% of light transmittance, stirred uniformly, and slowly poured into the filter cup along a glass rod to form a precoated filter cake with the thickness of about 3 mm.
(4) And (3) filtering: weighing 0.5g of the mixed filter medium, mixing with 50ml of dirty oil, stirring for 2 minutes, slowly pouring into a filter cup along a glass rod, after all pouring, starting a vacuum pump, controlling the vacuum pressure at 200mmHg for suction, and recording the suction completion time to indicate the speed of filtration.
(5) The filtration capacity was demonstrated by measuring the transmittance of the filtered neat oil using a type 722 spectrophotometer and calculating the percent change in transmittance.
(6) The percentage change of light transmittance and the filtration time are compared to determine the filter aid ratio.
(7) The final ratio was selected as the 4 th test ratio with the greatest percentage change in transmittance.
Table 1 example 1 sample specific information
Remark that the light transmittance of dirty oil is 62.1 percent
Percent change in transmittance = (transmittance after filtration-dirty oil transmittance)/dirty oil transmittance x 100%
Aluminum slag fine powder: the by-product in the aluminum alloy smelting process has the granularity of 100-300 meshes, wide distribution range and larger specific surface area.
Crushing grass stalks: a branch or stem of a plant is cut into pieces with a particle size of 0.2-1 mm.
Micro powder in an oxidation tank: a crystallized product of the solution in sulfuric acid oxidizing tank after reaction with aluminium alloy is prepared from aluminium sulfate through drying in constant-temp oven at 105 deg.C for 3-5 hr, grinding and sieving.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (2)
1. A method for quickly determining the proportion of a lubricating oil filter aid for aluminum rolling is characterized by comprising the following steps: the method comprises the following steps: filter aid is made into filter medium according to different contents, and the filter medium is mixed with rolling oil with 100 percent of light transmittance to form a precoating layer in a vacuum filtration device, and the thickness of the precoating layer is controlled; mixing a filter medium and dirty oil, slowly pouring the mixture into a filter cup for filtering, controlling the filtering pressure in the filtering process, recording the filtering time, and detecting the light transmittance by using a spectrophotometer after the filtered clean oil is filtered; determining the proportion by using the filtration time and the change percentage of the light transmittance; the method comprises the following specific steps:
(1) designing a test scheme: selecting different filter aids and content ranges, and designing a test scheme according to an orthogonal test;
(2) preparation: according to the test scheme, different filter aids are respectively weighed by an electronic analytical balance, stirred and mixed into filter media with different weight ratios, and the filter media are respectively poured into beakers;
(3) preparing a precoat layer: sleeving the non-woven filter cloth on a filter element of a filter cup of a vacuum filtration device for later use; weighing 3.8-4.2 g of the mixed filter medium, mixing with 40-60 ml of rolling oil with 100% of light transmittance, uniformly stirring, and slowly pouring into a filter cup along a glass rod to form a precoated filter cake with a certain thickness;
(4) and (3) filtering: weighing 0.5g of mixed filter medium, mixing with 50ml of dirty oil, stirring, pouring 100-200 ml/min of the mixture into a filter cup along a glass rod, starting a vacuum pump after all the mixture is poured, sucking under the vacuum pressure of 200mmHg, and recording the sucking completion time to explain the filtering speed;
(5) detecting the light transmittance of the filtered absolute oil by using a type 722 spectrophotometer, and calculating the percentage change of the light transmittance to indicate the filtering capacity;
(6) comparing the percentage change of the light transmittance with the filtration time to determine the proportion of the filter aid; the shorter the oil pumping filtration time is, the higher the filtration efficiency is; the percent change of the light transmittance is large, and the filtering capacity is large;
(7) selecting the filter aid ratio with the maximum percentage of light transmittance change; when the percentage change of light transmittance is maximum and the filtration time is longest, the proportion of the filter aid with the percentage change of light transmittance being less than the maximum is selected.
2. The method for rapidly determining the proportion of the filter aid for the aluminum rolling lubricating oil according to claim 1, which is characterized in that: and (4) determining the certain thickness in the step (3) according to the thickness of a filter cake of an actual production filtering system.
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| CN201811522806.1A CN109632725B (en) | 2018-12-13 | 2018-12-13 | Method for quickly determining proportion of lubricating oil filter aid for aluminum rolling |
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| CN201811522806.1A CN109632725B (en) | 2018-12-13 | 2018-12-13 | Method for quickly determining proportion of lubricating oil filter aid for aluminum rolling |
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| CN110893296B (en) * | 2019-11-29 | 2021-12-31 | 江苏大亚铝业有限公司 | Filter aid for aluminum foil rolling oil and use method thereof |
| CN111308021A (en) * | 2020-03-31 | 2020-06-19 | 龙佰四川钛业有限公司 | Method for detecting filtering performance of titanium liquid filter aid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103265995A (en) * | 2013-05-18 | 2013-08-28 | 黄山学院 | Preparation method of lubricating oil detergent |
| CN106669622A (en) * | 2017-01-23 | 2017-05-17 | 上海应用技术大学 | Lubricating oil composite filter aid and preparation method thereof |
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| US7396803B2 (en) * | 2003-04-24 | 2008-07-08 | Croda Uniqema, Inc. | Low foaming, lubricating, water based emulsions |
| JP5270511B2 (en) * | 2008-10-22 | 2013-08-21 | 日本ポリプロ株式会社 | Propylene-based resin composition and molded product thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103265995A (en) * | 2013-05-18 | 2013-08-28 | 黄山学院 | Preparation method of lubricating oil detergent |
| CN106669622A (en) * | 2017-01-23 | 2017-05-17 | 上海应用技术大学 | Lubricating oil composite filter aid and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 板带箔轧制工艺润滑油过滤用助滤剂;管连仲;《轻合金加工技术》;19990720 * |
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