Clean mining steel wire rope grease and preparation method thereof

Abstract

The invention discloses cleaning type mine steel wire rope grease which comprises the following components in percentage by mass: 20-40% of an adhesive, 8-15% of a thickening agent, 15-25% of microcrystalline wax, 2-8% of an anti-dust agent, 0.2-1% of an antioxidant, 1-3% of an anti-rust agent and the balance of base oil, and the sum of the mass percentages of the components is 100%. The preparation method specifically comprises the following steps: mixing the base oil, the adhesive, the thickening agent, the microcrystalline wax and the dustproof agent, putting into a blending kettle, heating and stirring, cooling after complete dissolution, adding the antioxidant and the antirust agent, stirring, and discharging from the kettle. The mining steel wire rope grease remover not only has excellent sealing, isolating and anti-corrosion performance, but also has excellent self-cleaning performance, and an elastic solid oil film can be formed on the surface of a steel wire rope.

Description

Technical Field

[0001] The invention belongs to the technical field of lubricating grease preparation, and in particular relates to a clean mining steel wire rope grease, and also relates to a preparation method of the clean mining steel wire rope grease. Background Art

[0002] Mining wire rope is an important part of mine hoisting equipment, and plays an important role in ensuring the safety and economy of hoisting operations. Due to the particularity of coal mine production conditions, most coal mines have many disaster factors, often with high air humidity, high proportion of mine dust, high wind speed in the shaft, high content of highly corrosive gases such as carbon monoxide, nitrogen dioxide and gas, etc. These special environments always threaten the safety of using mining wire ropes. Mining wire rope grease is the only protective product that can effectively increase the service life of wire ropes in addition to its own quality assurance. It must be developed and produced to meet its targeted environment. Mining wire rope grease is required to have good sealing and isolation of the surrounding environment and anti-corrosion effects. It should also avoid the embedding of mine dust between the strands during the movement of the wire rope, increase the wear between the strands and between the wire rope and the pulley during the force of the wire rope, and cause the wire rope to break prematurely.

[0003] There are few studies and literature reports on the formula of wire rope grease in China. In terms of formula, the base oil is mainly extracted oil and wax oil, and the thickener is mainly phenolic resin, petroleum resin, and polyethylene wax. In terms of product performance, the product's protection requirements against highly corrosive gases and high mineral dust ratios are not given much consideration. Summary of the invention

[0004] The purpose of the present invention is to provide a clean mining steel wire rope grease which has excellent self-cleaning performance and can form a protective oil film on the surface of the steel wire rope.

[0005] Another object of the present invention is to provide a method for preparing clean mining steel wire rope grease.

[0006] The technical solution adopted by the present invention is that the clean mining wire rope grease includes the following components by mass percentage: 20-40% of adhesive, 8-15% of thickener, 15-25% of microcrystalline wax, 2-8% of dust inhibitor, 0.2-1% of antioxidant, 1-3% of rust inhibitor, and the balance is base oil, and the sum of the mass percentages of the above components is 100%.

[0007] The present invention is also characterized in that:

[0008] The base oil is an intermediate non-hydrogenated mineral oil with a kinematic viscosity of 20 to 40 mm at 100°C. 2 / s.

[0009] The adhesive is PIB, with a molecular weight between 1000 and 3000, and a kinematic viscosity at 40°C between 20000 and 220000 mm 2 / s.

[0010] The thickener is Fischer-Tropsch wax, with a molecular weight between 500 and 1000 and a melting point between 95 and 120°C.

[0011] The dust suppressant is solid oxidized polyethylene wax with a molecular weight between 95 and 120°C.

[0012] The antioxidant is di-tert-butyl-p-cresol or di-tert-cresol.

[0013] The rust inhibitors are alkaline rust inhibitor T701 and acidic rust inhibitor T746, and the mass ratio of the alkaline rust inhibitor T701 to the acidic rust inhibitor T746 is 1:1.

[0014] Another technical solution adopted by the present invention is a method for preparing a clean mining steel wire rope grease, which is specifically: mixing the base oil, adhesive, thickener, microcrystalline wax and dust suppressant, putting them into a blending kettle, heating them to between 120 and 130°C, mechanically stirring them for 2 hours, and after they are completely dissolved, cooling them to 100°C, adding antioxidants and rust inhibitors, continuing to stir for 2 hours, and removing them from the kettle to obtain a clean mining steel wire rope grease.

[0015] The beneficial effects of the present invention are as follows: the mining wire rope degreasing agent of the present invention not only has excellent sealing, isolation and anti-corrosion performance, but also has excellent self-cleaning performance, and can form an elastic solid oil film on the surface of the wire rope, which can not only seal but also remove sand and gravel from the surface of the wire rope when the wire rope vibrates. The protective oil film formed on the surface of the wire rope has a large consistency and hardness, and even if sand grains stick to the surface of the wire rope due to the environment or other reasons, they will not enter the strands or the interior of the wire rope, and larger sand grains will automatically fall off during the operation of the wire rope, avoiding scratches or increased wear on the wire rope. DETAILED DESCRIPTION

[0016] The present invention is described in detail below in conjunction with specific implementation modes.

[0017] The clean mining steel wire rope grease of the present invention comprises the following components by mass percentage: 20-40% of adhesive, 8-15% of thickener, 15-25% of microcrystalline wax, 2-8% of dust suppressant, 0.2-1% of antioxidant, 1-3% of rust inhibitor, and the balance is base oil, and the sum of the mass percentages of the above components is 100%.

[0018] The base oil is a high viscosity intermediate base non-hydrogenated mineral oil with a kinematic viscosity of 20-40 mm at 100°C. 2 / s; Intermediate base non-hydrogenated mineral oil has good solubility for polymer adhesives and thickeners, which not only gives the product excellent lubrication properties, but also ensures the stability of the product system, making the oil film of the wire rope grease more uniform;

[0019] The adhesive is PIB, with a molecular weight between 1000 and 3000, and a kinematic viscosity at 40°C between 20000 and 220000 mm 2 / s; The application of adhesive is to better improve the kinematic viscosity of the product, thereby improving the strength of the wire rope lipid film and preventing the lipid film from rupture when squeezed by external force;

[0020] The thickener is Fischer-Tropsch wax, with a molecular weight of 500-1000 and a melting point of 95-120°C. The drop melting point of microcrystalline wax is 60-100°C; using Fischer-Tropsch wax as a thickener is mainly to give the wire rope grease good high-temperature performance; adding polyethylene wax as a dust-proof agent is mainly to ensure that the solid oil film of the product has a certain elasticity, and to help the gravel fall off when the wire rope vibrates;

[0021] The dust suppressant is solid oxidized polyethylene wax with a molecular weight between 95 and 120°C;

[0022] The antioxidant is di-tert-butyl-p-cresol or di-tert-cresol, with a melting point between 60 and 75°C;

[0023] The rust inhibitors are alkaline rust inhibitor T701 and acidic rust inhibitor T746, and the mass ratio of alkaline rust inhibitor T701 to acidic rust inhibitor T746 is 1:1;

[0024] The addition of antioxidants and rust inhibitors can effectively improve the antioxidant and rust-proof capabilities of wire rope grease. The above components are dispersed at high temperature and high speed to form a uniform and stable thickening system, which is evenly covered on the surface of wire ropes, strands and finished ropes by hot coating, which can seal and isolate harmful gases and dust for mine wire ropes, and effectively extend the service life of wire ropes.

[0025] The preparation method of the clean mining steel wire rope grease of the present invention is specifically as follows: base oil, adhesive, thickener, microcrystalline wax and dustproof agent are mixed, put into a blending kettle, heated to between 120 and 130° C., mechanically stirred for 2 hours, after complete dissolution, cooled to 100° C., antioxidant and rust inhibitor are added, stirring is continued for 2 hours, and the kettle is taken out to obtain the clean mining steel wire rope grease.

[0026] Example 1

[0027] The preparation method of the clean mining steel wire rope grease of the present invention is specifically as follows:

[0028] Put 25g of base oil, 25g of adhesive, 9g of thickener, 15g of microcrystalline wax and 3g of dust suppressant into a blending kettle, heat to 120°C, stir mechanically for more than 2 hours, and after complete dissolution, cool to 100°C, add 0.5g of antioxidant and 1g of rust inhibitor, continue stirring for 2 hours, and remove from the kettle.

[0029] Example 2

[0030] The preparation method of the clean mining steel wire rope grease of the present invention is specifically as follows:

[0031] Put 35g of base oil, 30g of adhesive, 12g of thickener, 20g of microcrystalline wax and 6g of dust suppressant into a blending kettle, heat to 125°C, stir mechanically for more than 2 hours, and after complete dissolution, cool to 100°C, add 0.8g of antioxidant and 2g of rust inhibitor, continue stirring for 2 hours, and remove from the kettle.

[0032] Example 3

[0033] The preparation method of the clean mining steel wire rope grease of the present invention is specifically as follows:

[0034] Put 45g of base oil, 38g of adhesive, 15g of thickener, 25g of microcrystalline wax and 7g of dust suppressant into a blending kettle in proportion, heat to 130°C, stir mechanically for more than 2 hours, and after complete dissolution, cool to 100°C, add 1g of antioxidant and 3g of rust inhibitor, continue stirring for 2 hours, and remove from the kettle.

[0035] Comparative Example

[0036] Taking ordinary wire rope grease as a comparative example, its composition is high viscosity mineral oil, petroleum wax paste, microcrystalline wax and anti-rust additives, and typical data are shown in Table 1. It can be seen that the adhesion performance, corrosion performance and low temperature performance of the wire rope grease of the present invention are better than those of the wire rope grease in the comparative example.

[0037] Table 1 Test data of example samples and typical data of comparative examples

[0038]

[0039]

[0040] The present invention adopts high-viscosity intermediate-base non-hydrogenated mineral oil mainly to ensure that the product has good solubility in solid thickeners; and together with the adhesive, it gives the product oil film good load-bearing capacity, and the oil film does not break when the rope strands are stressed and encounter sand and gravel impact; Fischer-Tropsch wax is used as a thickener to better give the product stable high-temperature performance and adhesion; solid oxidized polyethylene wax is used as a dust inhibitor to better disperse it in the product system, increase the elasticity of the wire rope grease film, and better help the sand and dust fall off; phenolic antioxidants are used as antioxidants to prevent the wire rope grease film from aging prematurely and producing corrosive substances; alkaline and acidic rust inhibitors are reasonably matched as rust inhibitors to better form a dense oil film on the surface of the wire rope, which plays a role in preventing corrosive substances from entering the main surface of the wire rope and causing rust.

[0041] The clean mining wire rope grease product of the present invention has excellent sealing, isolation and corrosion resistance as well as excellent self-cleaning performance. The protective oil film formed on the surface of the wire rope has greater viscosity and hardness, which prevents sand from entering the wire rope strands or the interior due to the environment or other reasons. Larger sand will also automatically fall off during the operation of the wire rope, thus avoiding scratches or increased wear on the wire rope.

Claims

1. Clean type mining wire rope grease, characterized by: The composition comprises the following components by mass percentage: 20-40% of adhesive, 8-15% of thickener, 15-25% of microcrystalline wax, 2-8% of dust suppressant, 0.2-1% of antioxidant, 1-3% of rust inhibitor, and the balance is base oil. The sum of the mass percentages of the above components is 100%.

2. The clean mining wire rope grease according to claim 1, characterized in that: The base oil is an intermediate non-hydrogenated mineral oil with a kinematic viscosity of 20 to 40 mm at 100°C. 2 / s.

3. The clean mining wire rope grease according to claim 1, characterized in that: The adhesive is PIB, with a molecular weight between 1000 and 3000, and a kinematic viscosity at 40°C between 20000 and 220000 mm 2 / s.

4. The clean mining wire rope grease according to claim 1, characterized in that: The thickener is Fischer-Tropsch wax, with a molecular weight of 500 to 1000 and a melting point of 95 to 120°C.

5. The clean mining steel wire rope grease according to claim 1, characterized in that: The dust-proof agent is solid oxidized polyethylene wax with a molecular weight between 95 and 120 °C.

6. The clean mining steel wire rope grease according to claim 1, characterized in that: The antioxidant is di-tert-butyl-p-cresol or di-tert-cresol.

7. The clean mining wire rope grease according to claim 1, characterized in that: The rust inhibitors are alkaline rust inhibitor T701 and acidic rust inhibitor T746, and the mass ratio of the alkaline rust inhibitor T701 to the acidic rust inhibitor T746 is 1:

1.

8. The method for preparing the clean mining steel wire rope grease according to any one of claims 1 to 7, characterized in that: Specifically: mix the base oil, adhesive, thickener, microcrystalline wax and dust suppressant, put them into a blending kettle, heat to between 120 and 130°C, stir mechanically for 2 hours, and after they are completely dissolved, cool to 100°C, add antioxidant and rust inhibitor, continue stirring for 2 hours, and remove from the kettle to obtain clean mining wire rope grease.

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