JPH03179234A - Measurement of oil component in soluble oil - Google Patents

Abstract

PURPOSE:To reduce measurement of an oil component remarkably while ena bling prevention of changes in quality of a treating material as caused by deteri oration in the oil by a method wherein a soluble oil is held into a container, mineral acid is added thereto and then, the oil component is separated by centrif ugal separation. CONSTITUTION:A soluble oil (for example, a part of a soluble oil used is taken out) is held into a container and for example, one or two or more of hydrochloric acid, sulfuric acid, phosphoric acid, nitric acid and the like are added thereto as mineral acid. Then, the container is set into a centrifugal separator to separate an oil component of the soluble oil within the container. In such an arrangement, with the addition of the mineral acid, iron components or the like in the oil are dissolved while the oil component is separated in a scum. At the same time, separation in the container by the centrifugal separation ensures the separation. Then, the oil component separated is shifted to an another container to measure an amount of the oil component (by capacity ratio). Here, the use of a transparent container with a graduation makes the measurement even quicker.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for measuring oil content in soluble oil.

Conventional technology As a soluble oil, for example, cold rolling oil for copper strip, etc. improves the rolling performance of the rolling machine and also provides a simple rust prevention function between processes, and the oil content in the rolling oil is important for fully demonstrating the above functions.

Therefore, a part of the rolling oil is extracted during rolling and the oil content is measured. For example, as in JP-A-51-118080, rolling oil is poured into a cell and the critical angle of total reflection of the rolling oil is measured. A method is disclosed for measuring oil content by observing changes in oil content using a bendometer.

However, this measurement method requires large-scale equipment and is not suitable for on-site use, so generally a portion of the rolling oil during rolling is taken out and stored in a flask for approximately 30 minutes.
The oil content during rolling is measured by heating and decomposing the product for about 90 minutes in hot water of about 80°C to separate the oil content, which takes about 120 minutes.

However, in the case of continuous cold rolling of copper strips, the average rolling time is about 20 minutes with a 40 t coil, and as much as 6 pieces (240 t) are rolled with the 40 t coil while the rolling oil is being measured. For example, if the rolling oil in the rolling oil (used in circulation) has deteriorated and the oil content is below the specified level, rolling friction will increase, roll wear will progress rapidly, and the rolls or rolling mill may be damaged. Occur. Furthermore, it is accompanied by major drawbacks such as deterioration in rust prevention ability and the possibility of rust formation between processes.

In addition, when cutting steel materials, etc., a portion of the cutting oil is extracted and the oil content in the oil is similarly measured, which requires a long time. This method is accompanied by drawbacks such as surface flaws and uneven cutting surfaces.

Problems to be Solved by the Invention The present invention has been made in order to reliably solve the drawbacks of the prior art, in which oil and wood are in a suspended state.
This provides a method for quickly measuring the oil content in soluble oils, which are generally referred to as soluble oils.

Means for Solving the Problems The present invention is characterized in that soluble oil is stored in a container, mineral acid is added to the soluble oil, and then the oil is separated by centrifugation. This invention relates to a method for measuring oil content in oil.

That is, in the present invention, for example, a part of the soluble oil in use ((FI ring used) is taken out, it is stored in a container, and a mineral acid such as hydrochloric acid, sulfuric acid, phosphoric acid, nitric acid, etc. is added to the oil. One type or two or more types are added, and the -F component is generally commercially available.

Among the L mineral acids, WL acid and phosphoric acid have an exothermic effect and promote the reaction, but hydrochloric acid and nitric acid have almost no exothermic effect, and therefore it is preferable to carry out the reaction while heating.

As for the addition method, in the case of a mixture of two or more of the above, adding an acid with an exothermic effect and an acid with almost no exothermic effect as a mixture will deteriorate the exothermic effect, so in such cases, heating is not recommended. It is preferable to carry out the reaction simultaneously.

The amount added may be about 20 cc for 100 cc of soluble oil, and the addition of mineral acid dissolves iron and the like in the oil and separates the oil in the bran.

At the same time, the oil is separated by centrifugation. In other words, the container is placed in a centrifuge, and the oil content of the soluble oil is separated within the container by centrifugation.
Reliable separation can be achieved by processing at 1000 rpm at 2000 rpm.

As mentioned above, when the temperature of the soluble oil is 20 to 40°C, it is preferable to add the mineral acid almost evenly at 8G-150 seconds.If the addition rate is too fast, bumping may occur. Also, if the addition rate is slow, the reaction may not be sufficient and oil separation may be insufficient, which is not preferable.

Transfer the oil separated in this way to a separate container and measure the oil gk (volume ratio), or a more rapid method is 1, for example, attach a scale to the container, and the container itself measures the oil content in the soluble oil Resins, etc. that have enough transparency to distinguish them from other substances.

A glass container is used, and when the container is taken out from a centrifuge, the oil content is measured visually or by reading an image, etc., and the results are marked with an X and measures such as oil replenishment are taken as necessary.

Examples of soluble oils whose oil content can be measured in this way include cold rolling oil for steel strips and cutting oil for cutting.

There are press oils for press molding, mold release oils for press molds, dispersion type oils such as molding oils for remolding, emulsification type oils, etc.

Example Next, examples of the present invention will be listed together with comparative examples.

Example 1 100 cc (40 cc) of rolling oil (rolling oil in circulation) during copper strip rolling in a continuous cold rolling mill for copper strips was placed in a graduated container.
℃), and added 19 cc of sulfuric acid (95%) as a mineral acid over 120 seconds at an almost constant rate, and then processed in a centrifuge at 2000 rpm for 8 minutes.The oil content was measured to be 3.0 cc, and the required time was It took 15 minutes, including storing the rolling oil and setting the centrifuge. At this time, F
Met.

Example 2 While supplying cutting oil to the surface of the steel material using a grinder, 100 cc (room temperature) of the cutting oil during cutting was stored in a graduated container, and phosphoric acid (85%) was added as a mineral acid at an approximately constant rate of 90 cc.
Add 30cc in seconds, then centrifuge at 2000r
It was treated with PIl for 10 minutes, and the oil content was measured to be 3.0 cc, and the required time was 17 minutes, including storage of cutting oil, loading the centrifuge, etc. Analysis of the cutting oil at this time revealed that it was 80% mineral oil, 9% surfactant, 5% fatty acid, and 4% amines.
%, and the antibacterial agent was 2% during antibacterial control.

Example 3 i1 of steel Hf! 100 cc of normal feed oil (rolling oil during circulating use) during steel strip rolling in a cold rolling mill is placed in a container with a scale.
(40℃) and add 20c of m acid (35%) as mineral acid.
c, and boil it at 200O in a centrifuge.
rpm for 8 minutes, and the oil content was measured to be 3.0cc.
It was 5 minutes.

Analysis of the rolling oil at this time revealed that it contained 50% mineral oil, 40% synthetic esters and oils, 3% fatty acids, 4% emulsifier, 1% antioxidant, and 2% plum pressure agent.

Example 4 100 cc (100 cc) of rolling oil (rolling oil being used in circulation) during copper strip rolling in a continuous cold rolling mill for steel (1) was placed in a graduated container.
40℃) and 15cc of sulfuric acid (95%) as a mineral acid.
A mixture of 15 cc of
The oil content was measured to be 3.0 cc, and the required time was 16 minutes, taking into account the storage of rolling oil, setting in the centrifuge, etc. Analysis of the rolling oil at this time revealed that it was mineral oil. 51%, synthetic esters and fats and oils 40%, fatty acids 2%, emulsifiers 4%, antioxidants 1%, and extreme pressure agents 2%.

Example 5 Addition of sulfuric acid (95 $) as a mineral acid to the rolling oil of Example 4 1.5
Add a mixture of cc and 15 cc of nitric acid, boil this for 4 hours,
Then, as a result of similar separation treatment and analysis, it was found that 50% mineral oil
, synthetic ester and fat 40%, fatty acid 3%, emulsifier 4%
, 1% antioxidant, and 2% extreme pressure agent. Moreover, the required time was 21 minutes.

Comparative Example 1 100cc of rolling oil was used during rolling under the same conditions as in Example 1.
A total of 200 cc (combined with the amount of Example 1 to be taken out) was stored in a container, and 20 cc of sulfuric acid (95%) and 130 cc of magnesium sulfate (30%) were added to the rolling oil, followed by decomposition treatment by boiling heat treatment for 30 minutes. 90 in 80℃ warm water
The oil content was separated by heating and standing for several minutes, and the oil content was measured to be 3.0 cc, and the time required was 123 minutes, which included storage of rolling oil, thermal decomposition, transition to heating and standing, etc.

Analysis of the rolling oil at this time revealed that it was 50% mineral oil, 40% synthetic polyester and oil, 3% fatty acid, and 4% emulsifier.
The antioxidant content was 1% and the extreme pressure agent was 2%.

Comparative Example 2 Under the same conditions as Example 2, take out 100 cc of the cutting oil during cutting. Combine with the amount in Example 2 and extract 200 cc) and store it in a container, add 30 cc of phosphoric acid (85%) to the cutting oil and hydrogen phosphate. Add 120cc of dipotassium (60%), decompose it by boiling for 30 minutes, then boil it for 9 hours in 80℃ hot water.
The oil content was separated by heating and standing for 0 minutes, and the oil content was measured to be 3.0 cc, and the time required was 125 minutes, including oil storage, thermal decomposition, and transition to heating and standing. Analysis of the cutting oil at this time revealed that it contained 80% mineral oil, 9% surfactant, 5% fatty acid, 4% amines, and 2% antibacterial agent.

Effects of the Invention According to the present invention, the measurement of oil content in soluble oil can be significantly shortened, and deterioration in the quality of treated materials due to careless deterioration can be prevented.

Furthermore, the yield of treated materials can be improved.

Furthermore, roll replacement due to wear of the rolling rolls can be extended, and the roll unit consumption can be improved.

Historically, it has the effect of reducing wear on cutting tools such as grinders, lowering costs, and reducing the occurrence of scratches on treated materials, improving quality.

Claims (2)

[Claims] (1) A method for measuring oil content in soluble oil, which comprises storing soluble oil in a container, adding mineral acid to the soluble oil, and then separating the oil content by centrifugation. (2) The method for measuring oil content in soluble oil according to claim (1), wherein one or a mixture of two or more of hydrochloric acid, sulfuric acid, phosphoric acid, and nitric acid is used as the mineral acid.