CN115678288A - Composite flame retardant for improving friction performance of mining flame-retardant steel wire belt roller - Google Patents
Composite flame retardant for improving friction performance of mining flame-retardant steel wire belt roller Download PDFInfo
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- CN115678288A CN115678288A CN202110847374.7A CN202110847374A CN115678288A CN 115678288 A CN115678288 A CN 115678288A CN 202110847374 A CN202110847374 A CN 202110847374A CN 115678288 A CN115678288 A CN 115678288A
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Abstract
The invention discloses a composite flame retardant for improving the friction performance of a roller of a mine flame-retardant steel wire belt, which is characterized in that a silicon flame retardant is taken as a base material, a boron flame retardant, a halogen flame retardant, an antimony flame retardant and other inorganic flame retardants are added, and the friction problem of the roller of the steel wire rope core flame-retardant conveyor belt for a coal mine is better solved by combining a scientific and reasonable formula design. The flame retardant is characterized in that a silicon compound is used as a carrier, and boron, halogen, antimony and other inorganic flame retardants are added by a specific means, so that the flame retardants can be firmly combined with a rubber base material on one hand, and on the other hand, a hardened layer can be rapidly formed on the surface of rubber in the process of a roller friction test, so that the friction coefficient of the surface of the rubber is rapidly reduced, the hardness is further increased along with the test, the rubber is completely carbonized, a steady-state friction state is formed, and the roller friction test temperature is ensured to gradually and steadily decrease after reaching a certain peak value.
Description
Technical Field
The invention relates to the technical field of safety index processing of a steel wire rope core flame-retardant conveying belt for a coal mine, in particular to a composite flame retardant for improving the friction performance of a roller of a mine flame-retardant steel wire belt.
Background
Coal is always the main force of the energy industry, and the energy main position of the coal industry is still irreplaceable at present when the effort of searching new energy is not fundamentally broken through. With the rapid development of the coal industry, the requirements for high-speed and large-capacity coal transportation are greatly increased. The steel cord conveyor belt just meets the requirement, so that the steel cord conveyor belt plays an extremely important role in the process of transporting coal from the underground to the ground at present and even in a quite long period in future.
The steel wire core conveyer belt is made up by using high-performance galvanized steel wire ropes which are longitudinally arranged at a certain interval and are uniformly tensioned as framework materials, and coating core rubber and covering rubber with different performances and thicknesses on the upper side and the lower side and on the two sides of the framework materials through forming and vulcanizing. Has the characteristics of soft belt body, high tensile strength, small elongation, good grooving, flex resistance, fatigue resistance, impact resistance and the like.
In the process of applying the steel wire rope core conveyer belt to the coal mine, the high danger of the underground coal mine is also considered: high coal dust, multiple gas, difficult air circulation and inflammable coal. It is the danger among them that has much, therefore all put forth very high technical requirement to the various materials that the colliery used, implement strict mining safety control to the instrument that some colliery used. Specifically, for the steel wire rope core conveyor belt, four safety indexes are provided: first, the surface resistance is not more than 3X 10 8 Omega, so as to facilitate the charge produced by the friction between the belt and the carrier roller to be released as soon as possible in the running process of the conveying belt, and avoid fire caused by static electricity; second, alcohol burner burning requires a standard sample of about 96The sample is burnt in flame at 0 ℃ for 30s, and the sample is required to be completely self-extinguished within a specified time, so that the conveyer belt has self-extinguishing capability after being passively burnt, and fire disasters are reduced as much as possible; and thirdly, roller friction test, wherein the conveyer belt is required to wind around a steel roller with the diameter of 210mm to rotate the roller and keep the adhesive tape still, the test time is 1 hour, the conditions of flame combustion and flameless combustion cannot occur in the whole test process, and the surface temperature of the roller cannot exceed 325 ℃. The index mainly considers that once the conveyer belt is stuck and can not rotate in the using process of the conveyer belt, the driving roller is rubbed with the conveyer belt, so that sparks can not occur to cause fire, and meanwhile, the temperature can not reach the ignition temperature of coal dust in the pit, namely 325 ℃, so that the aim of actively preventing the fire of the conveyer belt is fulfilled; and fourthly, a tunnel propane combustion test, wherein the test is to simulate the condition that a fire disaster occurs on the site of the conveyer belt, propane flame is applied to one end of a conveyer belt sample, the residual length of the conveyer belt is observed after the specified time is reached, and the burning condition of the adhesive tape is observed in the test process, so that the capability of preventing the fire disaster from spreading after the conveyer belt is passively burned is investigated.
Among the above four indexes, the roller friction test is an important index. Although various detection and control means are advanced along with the advancement of the technology, the abnormity occurring in the running process of the conveying belt can be found in time, and the stopping can be theoretically carried out in time when the problem is found, in reality, the interference may occur, so that the timely starting of the monitoring means is influenced, and the great loss is caused. Therefore, from the perspective of the conveyor belt, a new technology is actively explored, so that the conveyor belt has a certain safety function under the condition that other means fail, and disasters are avoided and delayed as much as possible.
Disclosure of Invention
The invention aims to provide a composite flame retardant for improving the friction performance of a mine flame-retardant steel wire belt roller, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a composite flame retardant for improving the friction performance of a roller of a mining flame-retardant steel wire belt comprises the following components in percentage by weight: 40-45 parts of silicon flame retardant; 10-12 parts of boron flame retardant; halogen-based flame retardant: 30-35 parts of chlorinated paraffin; 10-12 parts of antimony flame retardant; 2-10 parts of inorganic flame retardant.
As a still further scheme of the invention: the silicon flame retardant is fumed silica; the boron flame retardant is zinc borate; the halogen flame retardant is chlorinated paraffin; the antimony flame retardant is antimony trioxide; the inorganic flame retardant is magnesium hydroxide.
As a still further scheme of the invention: the composite silicon flame retardant is prepared by taking a silicon flame retardant as a carrier, and adding boron, halogen, antimony and other inorganic flame retardants by a method of simultaneously carrying out surface activation on the carrier and the flame retardant; wherein, the silicon flame retardant plays a role in flame retardance on one hand and plays a role in bridging rubber and other flame retardants on the other hand; the silicon, boron, halogen and inorganic flame retardant plays a role in quickly hardening the rubber surface in the process of the roller friction test; the silicon flame retardant is a nano-scale silicon-containing compound similar to white carbon black, and has extremely high specific surface area and more surface hydroxyl groups.
As a still further scheme of the invention: the specific gravity of the composite flame retardant is 1300-1400 g/L.
The preparation process of the composite flame retardant adopts a two-step process, and specifically comprises the following steps:
(1) Putting the silicon flame retardant base material into a stirring kettle with an atomization function, spraying the atomized silane coupling agent at the temperature of 60-70 ℃, and continuously stirring for 30min.
(2) Standing the silicon flame retardant base material obtained in the step (1) for 2 hours or cooling the temperature to below 30 ℃, restarting stirring, starting heating, continuously adding the boron flame retardant, the halogen flame retardant, the antimony flame retardant and the inorganic flame retardant into the stirring kettle according to the proportion, continuously stirring, heating to 60-70 ℃, keeping for 10min, starting cooling, stopping stirring, discharging and packaging.
When the steel wire rope core flame-retardant conveying belt covering rubber is prepared, the currently common natural rubber and styrene butadiene rubber can be used.
As a still further scheme of the invention: when the composite flame retardant is used, 100 kg of raw rubber needs to be added, and the amount of the flame retardant is about 35-50 kg.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention comprehensively applies various types of flame retardants, and combines the flame retardants together according to a specific proportion to generate a strong flame retardant effect. The chloroprene rubber is added into general rubber (such as natural rubber, styrene-butadiene rubber and the like), chloroprene rubber is not needed completely, complex process difficulty and uncontrollable property in the production process of the chloroprene rubber can be avoided, and meanwhile, the formula cost can be greatly reduced, and the market competitiveness is improved.
Compared with the original formula using chloroprene rubber, the formula cost is reduced by 4.00 yuan/kg; the specific gravity of the rubber is reduced from 1.48g/l to 1.33g/l, so that the manufacturing cost is greatly reduced, and the power consumption in the operation process can be greatly reduced.
2. The fire retardant is added into the general rubber, so that the safety index requirements of the coal department on the steel wire rope core fire-retardant conveying belt, especially the roller friction technical index requirements, can be easily met.
3. The flame retardant of the invention can be easily mixed into rubber base materials, has very good compatibility with rubber and simple process control. In particular, the rubber material has no high requirement for rubber material parking and no scorching risk.
4. The flame retardant can be well combined with rubber through the silicon substrate in the rubber vulcanization process, so that the influence on the physical and mechanical properties of the rubber is extremely small; the advantage is greatly produced in the roller test process, namely in the test process, the surface of the conveying belt is not easy to damage, peel off and the like, and rubber materials can be further crosslinked along with the friction, so that the surface hardness of the conveying belt can be quickly improved, the rubber material carbonization process is accelerated, and finally the trafficability of the test item can be well ensured.
5. The sizing material produced by using the flame retardant has higher performance than the sizing material using the original neoprene adhesive, and the formula cost is obviously reduced; and the specific gravity of the rubber material is obviously lower than that of the rubber material using chloroprene rubber, and the reduction amplitude is about 10 percent, so that the purposes of energy conservation and consumption reduction are achieved in the long-term use process, and the rubber material has high social benefit and economic benefit.
Drawings
Fig. 1 shows the roller friction test of the present invention performed for 9 minutes and 55 seconds, and it can be seen that the surface temperature of the roller has been slowly decreased from the high temperature point of 214 c to 196 c.
FIG. 2 is a temperature profile of a one hour roller rub test of the present invention.
Fig. 3 shows that the carbonization condition of the surface of the conveyer belt after roller friction is very ideal after the test of the invention is finished, and the temperature is finally reduced to 173 ℃ after 1 hour of roller friction test, which is far lower than the technical requirement of 325 ℃.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
A composite flame retardant for improving the friction performance of a mining flame-retardant steel wire belt roller comprises the following components in parts by weight: 40-45 parts of silicon flame retardant; 10-12 parts of boron flame retardant; halogen-based flame retardant: 30-35 parts of chlorinated paraffin; 10-12 parts of antimony flame retardant; 2-10 parts of an inorganic flame retardant.
The silicon flame retardant is fumed silica; the boron flame retardant is zinc borate; the halogen flame retardant is chlorinated paraffin; the antimony flame retardant is antimony trioxide; the inorganic flame retardant is magnesium hydroxide.
The composite silicon flame retardant is prepared by taking a silicon flame retardant as a carrier, and adding boron, halogen, antimony and other inorganic flame retardants by a method of simultaneously carrying out surface activation on the carrier and the flame retardant; wherein, the silicon flame retardant plays a role in flame retardance on one hand and plays a role in bridging rubber and other flame retardants on the other hand; the silicon, boron, halogen and inorganic flame retardant plays a role in quickly hardening the rubber surface in the process of the roller friction test; the silicon flame retardant is a nano-scale silicon-containing compound similar to white carbon black, and has extremely high specific surface area and more surface hydroxyl groups.
The specific gravity of the composite flame retardant is 1300-1400 g/L.
The preparation process of the composite flame retardant adopts a two-step process, which comprises the following steps:
(1) Putting the silicon flame retardant base material into a stirring kettle with an atomization function, spraying the atomized silane coupling agent at the temperature of 60-70 ℃, and continuously stirring for 30min.
(2) Standing the silicon flame retardant base material obtained in the step (1) for 2 hours or cooling the temperature to below 30 ℃, restarting stirring, starting heating, continuously adding the boron flame retardant, the halogen flame retardant, the antimony flame retardant and the inorganic flame retardant into the stirring kettle according to the proportion, continuously stirring, heating to 60-70 ℃, keeping for 10min, starting cooling, stopping stirring, discharging and packaging.
When the steel wire rope core flame-retardant conveyor belt covering rubber is prepared, the currently common natural rubber and styrene butadiene rubber can be used.
The composite flame retardant is used, 100 kg of raw rubber is used, and the amount of the flame retardant is about 35-50 kg.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The composite flame retardant for improving the friction performance of the mining flame-retardant steel wire belt roller is characterized by comprising the following components in parts by weight: 40-45 parts of silicon flame retardant; 10-12 parts of boron flame retardant; halogen flame retardant: 30-35 parts of chlorinated paraffin; 10-12 parts of antimony flame retardant; 2-10 parts of inorganic flame retardant.
2. The composite flame retardant for improving the friction performance of a roller of a mining flame-retardant steel wire belt according to claim 1, wherein the silicon-based flame retardant is fumed silica; the boron flame retardant is zinc borate; the halogen flame retardant is chlorinated paraffin; the antimony flame retardant is antimony trioxide; the inorganic flame retardant is magnesium hydroxide.
3. The composite flame retardant for improving the friction performance of the roller of the mining flame-retardant steel wire belt according to claim 1, which is characterized in that the composite silicon flame retardant is prepared by adding boron flame retardants, halogen flame retardants, antimony flame retardants and other inorganic flame retardants by using a silicon flame retardant as a carrier and simultaneously carrying out surface activation on the carrier and the flame retardant; wherein, the silicon flame retardant plays a role in flame retardance on one hand and plays a role in bridging rubber and other flame retardants on the other hand; the silicon, boron, halogen and inorganic flame retardant plays a role in quickly hardening the rubber surface in the friction test process of the roller; the silicon flame retardant is a nano-scale silicon-containing compound similar to white carbon black, and has extremely high specific surface area and more surface hydroxyl groups.
4. The composite flame retardant for improving the friction performance of the roller of the flame-retardant steel wire belt for mines according to claim 1, wherein the specific gravity of the composite flame retardant is 1300-1400 g/L.
5. The preparation method of the composite flame retardant for improving the friction performance of the roller of the flame-retardant steel wire belt for mines according to any one of claims 1 to 4, wherein the preparation process of the composite flame retardant adopts a two-step process, and specifically comprises the following steps:
(1) Putting the silicon flame retardant base material into a stirring kettle with an atomization function, spraying a mist silane coupling agent at the temperature of 60-70 ℃, and continuously stirring for 30min;
(2) Standing the silicon flame retardant base material obtained in the step (1) for 2 hours or cooling the temperature to below 30 ℃, restarting stirring, starting heating, continuously adding the boron flame retardant, the halogen flame retardant, the antimony flame retardant and the inorganic flame retardant into the stirring kettle according to the proportion, continuously stirring, heating to 60-70 ℃, keeping for 10min, starting cooling, stopping stirring, discharging and packaging.
6. The preparation method of the composite flame retardant for improving the friction performance of the roller of the mining flame-retardant steel wire belt according to claim 1, wherein when the covering rubber of the steel wire rope core flame-retardant conveying belt is prepared, the currently common natural rubber and styrene butadiene rubber can be used.
7. The use method of the composite flame retardant for improving the friction performance of the roller of the flame-retardant steel wire belt for mines according to any one of claims 1 to 4, wherein 100 kg of raw rubber is used, and the amount of the flame retardant is about 35 to 50 kg.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110847374.7A CN115678288A (en) | 2021-07-21 | 2021-07-21 | Composite flame retardant for improving friction performance of mining flame-retardant steel wire belt roller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110847374.7A CN115678288A (en) | 2021-07-21 | 2021-07-21 | Composite flame retardant for improving friction performance of mining flame-retardant steel wire belt roller |
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| CN115678288A true CN115678288A (en) | 2023-02-03 |
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| CN202110847374.7A Pending CN115678288A (en) | 2021-07-21 | 2021-07-21 | Composite flame retardant for improving friction performance of mining flame-retardant steel wire belt roller |
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| CN102516617A (en) * | 2011-12-08 | 2012-06-27 | 无锡宝通带业股份有限公司 | High-strength laminated fire-retarding conveyer belt coating rubber, and preparation method thereof |
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