Low-carbon total-synthesis roller grinding fluid

Abstract

The invention relates to the technical field of metal working fluids, in particular to a low-carbon total-synthesis roller grinding fluid. The invention discloses a low-carbon total synthesis roller grinding fluid. The low-carbon total synthesis roller grinding fluid is prepared from the following components in percentage by mass: 5%-10% of triethanolamine, 15%-25% of monoisopropanolamine, 8%-12% of a surfactant, 3%-6% of dicarboxylic acid, 5%-8% of organic acylamino acid and 50%-65% of water. The low-carbon total-synthesis roller grinding fluid is good in lubricating performance, long in antirust period, good in antibacterial activity, not prone to deterioration and stink, free of harmful substances, suitable for the requirements of a grinding machining process and good in market application prospect.

Description

Technical Field

[0001] The invention relates to the technical field of metalworking fluids, and in particular to a low-carbon fully synthetic roller grinding fluid. Background Art

[0002] The rolling process has very high requirements for the surface quality of the rolled plate, so the surface quality of the rollers, especially the working rollers, is also very high. Rollers with surface defects will affect the surface quality of the rolled steel plate. Therefore, the grinding process of the grinding machine roller has extremely high requirements for the grinding fluid, and the lubrication, cooling and rust prevention properties of the grinding fluid are required to be very excellent. However, the traditional roller grinding fluid lubrication has the disadvantages of short anti-rust cycle, easy bacteria corruption and odor, and containing harmful substances such as nitrite.

[0003] At present, the most commonly used grinding fluids on the market are fully synthetic grinding fluids, which are generally composed of rust inhibitors, pH adjusters, metal corrosion inhibitors, antibacterial additives, lubricating additives, anti-hard water additives, sedimentation agents and water. Rust-proof additives include chromates, silicates, nitrites, borates and esters. Chromates are good at preventing rust, but they are easy to fail and are harmful to people and the environment, so they have long been banned. Silicates have limited anti-rust effects and are prone to scaling over time. Nitrites are good at preventing rust, but they are easy to crystallize and precipitate, forming white spots, and they are carcinogenic substances, which are harmful to the human body and have gradually withdrawn from industrial production. The disadvantage of using strong alkali sodium hydroxide and potassium hydroxide as pH adjusters is that they are harmful to human health and the environment, and the cost of waste liquid treatment is high. Lubricants with borate esters and sulfonated castor oil as the main components are harmful to people and the environment, and are also prone to hydrolysis and adhesion, which have a great impact on grinding accuracy and cleanliness.

[0004] Therefore, it is an urgent problem to be solved to develop a grinding fluid that has good lubrication performance, long anti-rust period, good antibacterial property, not easy to deteriorate and stink, does not contain harmful substances, and is suitable for the grinding process requirements through component screening and component combination research. Summary of the invention

[0005] In order to solve the above technical problems, the present invention develops a low-carbon fully synthetic roller grinding fluid by studying and screening the components of the fully synthetic roller grinding fluid and further exploring the compatibility performance of each component.

[0006] On the one hand, the present invention provides a low-carbon fully synthetic roller grinding fluid, which is composed of 5% to 10% of triethanolamine, 15% to 25% of monoisopropanolamine, 8% to 12% of surfactant, 3% to 6% of dicarboxylic acid, 5% to 8% of organic acylamino acid and 50% to 65% of water in mass percentage.

[0007] Furthermore, the low-carbon fully synthetic roller grinding fluid is composed of 8% triethanolamine, 19% monoisopropanolamine, 9% surfactant, 4% dicarboxylic acid, 7% organic acylamino acid and 60% water in terms of mass percentage.

[0008] Furthermore, the monoisopropanolamine and triethanolamine in the low-carbon fully synthetic roller grinding fluid provide an alkaline environment and assist in rust prevention.

[0009] Furthermore, the dicarboxylic acid in the low-carbon fully synthetic roller grinding fluid is a rust inhibitor.

[0010] Furthermore, the organic acylamino acid in the low-carbon fully synthetic roller grinding fluid is a rust inhibitor.

[0011] On the other hand, the present invention provides a method for preparing the low-carbon fully synthetic roller grinding fluid, the preparation method comprising the following steps:

[0012] Step 1: Weigh each component of the low-carbon fully synthetic roll grinding fluid according to its mass percentage.

[0013] Step 2: Add water, triethanolamine and monoisopropanolamine into a container and stir until all components are dissolved.

[0014] Step 3: Add dicarboxylic acid and organic acylamino acid to the mixture prepared in step 2, and stir until well mixed.

[0015] Step 4: Add the remaining raw materials to the mixture prepared in step 3, and stir until the mixed solution becomes a transparent and uniform liquid, thus obtaining a low-carbon fully synthetic roller grinding fluid.

[0016] Furthermore, the stirring in step three of the preparation method is low-speed stirring, and the stirring speed of the low-speed stirring is 60 to 500 rpm.

[0017] Furthermore, the stirring time in step three of the preparation method is 30 to 60 minutes.

[0018] Furthermore, the stirring in step 4 of the preparation method is low-speed stirring, and the stirring speed of the low-speed stirring is 100 to 300 rpm.

[0019] In addition, the present invention also provides the application of the low-carbon fully synthetic roller grinding fluid in a rolling process.

[0020] Compared with the prior art, the present invention has at least the following advantages or beneficial effects:

[0021] (1) The low-carbon fully synthetic roller grinding fluid provided by the present invention is a rust inhibitor obtained by screening through a large number of formula compatibility tests, which is a combination of dicarboxylic acid and organic acyl amino acid, wherein the mass ratio of dicarboxylic acid to organic acyl amino acid is 3-6:5-8, so that the low-carbon fully synthetic roller grinding fluid has excellent rust prevention performance, and the rust inhibitor avoids the shortcomings of traditional rust inhibitors that are harmful to the human body or pollute the environment.

[0022] (2) The low-carbon fully synthetic roller grinding fluid surfactant provided by the present invention and its addition ratio of 8% to 12% make the grinding fluid have both excellent lubrication and cleaning properties, and at the same time have the advantages of being green and environmentally friendly, easy to degrade, safe for the human body, friendly to the environment, not easy to adhere, low foaming, hard water resistant, and residue-free.

[0023] (3) The low-carbon fully synthetic roller grinding fluid developed by the present invention through component screening and component combination research and development has synergistic effects of various components, good lubrication performance, long anti-rust period, good antibacterial property, not easy to deteriorate and stink, does not contain harmful substances, and is suitable for grinding process requirements. DETAILED DESCRIPTION

[0024] Hereinafter, the technical solution of the present invention will be described in conjunction with embodiments, but the present invention is not limited to the following embodiments.

[0025] The experimental methods and detection methods in the following embodiments are all conventional methods unless otherwise specified; the raw materials and materials are all commercially available unless otherwise specified; the index data are all conventional measurement methods unless otherwise specified.

[0026] Surfactant: Block structure polyether (BASF 2520)

[0027] Dicarboxylic acid: dodecanedioic acid (DDDA)

[0028] Organic acyl amino acid: Organic acyl amino acid rust inhibitor (NEUF 585)

[0029] Example 1

[0030] This embodiment is for preparing a low-carbon fully synthetic roll grinding fluid.

[0031] 9% of triethanolamine, 15% of monoisopropanolamine, 8% of BASF 2520, 3% of DDDA, 5% of NEUF 585 and 65% of water were weighed according to mass percentage and set aside.

[0032] Water, triethanolamine and monoisopropanolamine were added into a container and stirred until the components were dissolved to obtain a mixture 1.

[0033] Add DDDA and NEUF 585 to the mixture 1, stir at 60-500 rpm for 30 minutes to obtain a mixture 2.

[0034] After adding the remaining raw materials 2 to the mixture, stir at a speed of 100 to 300 rpm until the mixed solution becomes a transparent and uniform liquid, thus obtaining a low-carbon fully synthetic roller grinding fluid, which is marked as 1# low-carbon fully synthetic roller grinding fluid and is set aside.

[0035] Example 2

[0036] This embodiment is for preparing a low-carbon fully synthetic roll grinding fluid.

[0037] Weigh 10% triethanolamine, 25% monoisopropanolamine, 10% BASF 2520, 5% DDDA, 6% NEUF 585 and 50% water according to mass percentage and set aside.

[0038] Water, triethanolamine and monoisopropanolamine were added into a container and stirred until the components were dissolved to obtain a mixture 1.

[0039] Add DDDA and NEUF 585 to the mixture 1, stir at 60-500 rpm for 40 minutes to obtain a mixture 2.

[0040] After adding the remaining raw materials to the mixture 2, stir at a speed of 100 to 300 rpm until the mixed solution becomes a transparent and uniform liquid, thus preparing a low-carbon fully synthetic roller grinding fluid, which is marked as 2# low-carbon fully synthetic roller grinding fluid and is set aside.

[0041] Example 3

[0042] This embodiment is for preparing a low-carbon fully synthetic roll grinding fluid.

[0043] 5% triethanolamine, 20% monoisopropanolamine, 12% BASF 2520, 6% DDDA, 8% NEUF 585 and 57% water were weighed according to mass percentage and set aside.

[0044] Water, triethanolamine and monoisopropanolamine were added into a container and stirred until the components were dissolved to obtain a mixture 1.

[0045] Add DDDA and NEUF 585 to the mixture 1, stir at 60-500 rpm for 45 minutes to obtain a mixture 2.

[0046] After adding the remaining raw materials 2 to the mixture, stir at a speed of 100 to 300 rpm until the mixed solution becomes a transparent and uniform liquid, thus obtaining a low-carbon fully synthetic roller grinding fluid, which is marked as 3# low-carbon fully synthetic roller grinding fluid and is set aside.

[0047] Example 4

[0048] This embodiment is for preparing a low-carbon fully synthetic roll grinding fluid.

[0049] 8% triethanolamine, 19% monoisopropanolamine, 9% BASF 2520, 4% DDDA, 7% NEUF 585 and 60% water were weighed according to mass percentage and set aside.

[0050] Water, triethanolamine and monoisopropanolamine were added into a container and stirred until the components were dissolved to obtain a mixture 1.

[0051] Add DDDA and NEUF 585 to the mixture 1, stir at 60-500 rpm for 50 minutes to obtain a mixture 2.

[0052] After adding the remaining raw materials to the mixture 2, stir at a speed of 100 to 300 rpm until the mixed solution becomes a transparent and uniform liquid, that is, a low-carbon fully synthetic roller grinding fluid is obtained, marked as 4# low-carbon fully synthetic roller grinding fluid, and set aside.

[0053] Example 5

[0054] This embodiment is for preparing a low-carbon fully synthetic roll grinding fluid.

[0055] 6% triethanolamine, 21% monoisopropanolamine, 12% BASF 2520, 3% DDDA, 8% NEUF 585 and 58% water were weighed according to mass percentage and set aside.

[0056] Water, triethanolamine and monoisopropanolamine were added into a container and stirred until the components were dissolved to obtain a mixture 1.

[0057] Add DDDA and NEUF 585 to the mixture 1, stir at 60-500 rpm for 60 minutes to obtain a mixture 2.

[0058] After adding the remaining raw materials 2 to the mixture, stir at a speed of 100 to 300 rpm until the mixed solution becomes a transparent and uniform liquid, that is, a low-carbon fully synthetic roller grinding fluid is prepared, marked as 5# low-carbon fully synthetic roller grinding fluid, and set aside.

[0059] Example 6

[0060] This example is a test for the stability of a low-carbon fully synthetic roller grinding fluid.

[0061] The room temperature stability, high temperature stability and low temperature stability of the 1#-5# low carbon fully synthetic roller grinding fluids prepared in Examples 1 to 5 were tested respectively.

[0062] The 1#-5# low carbon fully synthetic roller grinding fluids were placed at room temperature (25°C), high and low temperature (50°C and 5°C) for 4 hours to observe whether there was turbidity, stratification or precipitation. The test results are shown in Table 1.

[0063] Table 1 Stability test results of low carbon fully synthetic roll grinding fluid

[0064] Test samples Is there precipitation? Is it turbid? Whether to layer 1# Low carbon fully synthetic roll grinding fluid no no no 2# low carbon fully synthetic roll grinding fluid no no no 3# low carbon fully synthetic roll grinding fluid no no no 4# low carbon fully synthetic roll grinding fluid no no no 5# low carbon fully synthetic roll grinding fluid no no no

[0065] The stability test results show that 1#-5# low carbon fully synthetic roller grinding fluids have good room temperature stability and high and low temperature stability, especially 4# low carbon fully synthetic roller grinding fluid. From the appearance, the appearance of 4# low carbon fully synthetic roller grinding fluid at 50°C and 5°C is no different from that at 25°C, which is the best embodiment of the present invention.

[0066] Example 6

[0067] This example is a test of the anti-rust performance of a low-carbon fully synthetic roller grinding fluid.

[0068] Referring to the anti-rust test method for water-based materials in JB / T 9189-2016, the 1#-5# low-carbon fully synthetic roller grinding fluid was diluted 20 times with tap water to perform a cast iron chip immersion test (4h at room temperature) to observe whether there are rust spots; the commercially available Castrol 9930C grinding fluid was used as a comparative agent to test its anti-rust performance. The test method was the same as the test method for 1#-5# low-carbon fully synthetic roller grinding fluid. The test results are shown in Table 2.

[0069] Table 2 Test results of anti-rust performance of low carbon fully synthetic roller grinding fluid

[0070] Test samples Rust resistance 1# Low carbon fully synthetic roll grinding fluid Level 0 2# low carbon fully synthetic roll grinding fluid Level 0 3# low carbon fully synthetic roll grinding fluid Level 0 4# low carbon fully synthetic roll grinding fluid Level 0 5# low carbon fully synthetic roll grinding fluid Level 0 Contrast agent (Castrol 9930C) Level 2

[0071] The test results show that the anti-rust performance of 1#-5# low-carbon fully synthetic roller grinding fluids is better than that of the comparison agent, indicating that the low-carbon fully synthetic roller grinding fluid provided by the present invention has excellent anti-rust performance.

[0072] As described above, the present invention can be well implemented. The above embodiments only describe the preferred implementation methods of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various changes and improvements made to the technical scheme of the present invention by ordinary technicians in this field should fall within the protection scope determined by the present invention.

Claims

1. A low-carbon fully synthetic roll grinding fluid, characterized in that: The low-carbon fully synthetic roller grinding fluid consists of 5% to 10% of triethanolamine, 15% to 25% of monoisopropanolamine, 8% to 12% of surfactant, 3% to 6% of dicarboxylic acid, 5% to 8% of organic acylamino acid and 50% to 65% of water in terms of mass percentage.

2. The low-carbon fully synthetic roll grinding fluid according to claim 1, characterized in that: The low-carbon fully synthetic roller grinding fluid consists of 8% of triethanolamine, 19% of monoisopropanolamine, 9% of surfactant, 4% of dicarboxylic acid, 7% of organic acylamino acid and 60% of water in terms of mass percentage.

3. The low-carbon fully synthetic roll grinding fluid according to claim 1, characterized in that: The monoisopropanolamine and triethanolamine provide an alkaline environment and assist in rust prevention.

4. The low-carbon fully synthetic roll grinding fluid according to claim 1, characterized in that: The dicarboxylic acid is a rust inhibitor.

5. The low-carbon fully synthetic roll grinding fluid according to claim 1, characterized in that: The organic acyl amino acid is a rust inhibitor.

6. The method for preparing the low-carbon fully synthetic roller grinding fluid according to any one of claims 1 to 5, characterized in that: The following steps are included: Step 1: Weigh each component of the low-carbon fully synthetic roll grinding fluid according to its mass percentage. Step 2: Add water, triethanolamine and monoisopropanolamine into a container and stir until all components are dissolved. Step 3: Add dicarboxylic acid and organic acylamino acid to the mixture prepared in step 2, and stir until well mixed. Step 4: Add the remaining raw materials to the mixture prepared in step 3, and stir until the mixed solution becomes a transparent and uniform liquid, thus obtaining a low-carbon fully synthetic roller grinding fluid.

7. The preparation method according to claim 6, characterized in that: The stirring in step three is low-speed stirring, and the stirring speed of the low-speed stirring is 60 to 500 rpm.

8. The preparation method according to claim 6, characterized in that: The stirring time in step 3 is 30 to 60 minutes.

9. The preparation method according to claim 6, characterized in that: The stirring in step 4 is low-speed stirring, and the stirring speed of the low-speed stirring is 100 to 300 revolutions per minute.

10. The low-carbon fully synthetic roll grinding fluid according to claims 1 to 5 is used in a rolling process.