Coking inhibitor as well as use method and application of coking inhibitor

Abstract

The invention provides a coking inhibitor as well as a use method and application of the coking inhibitor. The coking inhibitor is prepared from the following components in percentage by mass: 30 to 70 percent of first silicate and 30 to 70 percent of other raw materials, the first silicate comprises one or more of kaolin, metakaolin, washed kaolin and white mud; the other raw materials comprise one or two of second silicate and oxide; the second silicate comprises one or more of chlorite, serpentine, talc, asbestos and vermiculite; the oxide comprises one or two of silicon oxide and iron oxide. Aiming at the coking type of the Kingery model, high-concentration sol formed by electrolyte with high viscosity and large mass points and deposited due to flocculation, the first silicate and other raw materials which are limited according to a specific proportion are compounded as a coking inhibitor, so that the viscosity of the coking product is reduced, the coking body is embrittled and is easy to clean, and the coking effect of the Kingery model is improved. The thickness of the focus hanging body is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of boiler coking inhibition, and in particular to a coking inhibitor, a method for using the coking inhibitor, and an application thereof. Background Art

[0002] With the development of industry, boilers, as important heat energy conversion equipment, have been widely used in various fields. However, the problem of boiler coking has always been a difficult problem that has plagued the industry. Boiler coking refers to the process in which the ash in the fuel melts at high temperature and adheres to the heating surface to form a hard coke body during the operation of the boiler. Boiler coking can cause many hazards, such as reducing the heat transfer efficiency of the boiler. Because the thermal conductivity of the coking layer is poor, the heat absorbed by the heating surface will be reduced, thereby affecting the steam production and quality. Moreover, severe coking may cause damage to the heating surface, such as causing local overheating and deformation of the pipeline or even bursting, increasing maintenance costs and downtime.

[0003] However, traditional coking inhibitors have the problem of poor stability of effect and cannot work well for coking of different sintering types, such as the coking products of the Kingery model in sintering theory. Summary of the invention

[0004] Based on this, the present application provides a coking inhibitor that can be used for sintering coking products formed by Kingery models, and a method for using the coking inhibitor and an application thereof.

[0005] The present application provides a coking inhibitor, which comprises, by mass percentage, 30% to 70% of a first silicate and 30% to 70% of other raw materials;

[0006] The first silicate comprises one or more of kaolin, metakaolin, washed kaolin and white mud;

[0007] The other raw materials include one or two of a second silicate and an oxide;

[0008] The second silicate includes one or more of chlorite, serpentine, talc, asbestos, mica and vermiculite;

[0009] The oxide includes one or both of silicon oxide and iron oxide.

[0010] In one embodiment, the composition of the coking inhibitor includes, by mass percentage, 30% to 70% of the first silicate, 15% to 40% of the second silicate, and 8% to 35% of the oxide.

[0011] In one embodiment, the composition of the coking inhibitor includes, by mass percentage, 50% to 70% of the first silicate, 15% to 25% of the second silicate, and 8% to 25% of the iron oxide.

[0012] In one embodiment, the composition of the coking inhibitor includes, by mass percentage, 30% to 70% of the first silicate, 15% to 40% of the second silicate, and 15% to 35% of the silicon oxide.

[0013] In one embodiment, the composition of the coking inhibitor includes, by mass percentage, 30% to 40% of the first silicate and 60% to 70% of the second silicate.

[0014] In one embodiment, the second silicate includes one or more of talc, vermiculite, serpentine, asbestos and mica.

[0015] In one embodiment, the particle size of the first silicate is 100 mesh to 1300 mesh.

[0016] The present application also provides a method for using a coking inhibitor, comprising the following steps: adding the above-mentioned coking inhibitor into a coked body.

[0017] Furthermore, the present application provides the use of the above-mentioned coking inhibitor in treating coking in the ascending flue or side-blown furnace of a metal smelter.

[0018] Furthermore, the present application provides the use of the above-mentioned coking inhibitor in treating ash accumulation in a waste heat boiler or a side-blown furnace surface cooler of a metal smelter.

[0019] The present application targets the coking type of the Kingery model, which has high viscosity, strong wettability of the solution to solid particles, and contains large-particle electrolytes to form a high-concentration sol, which aggregates and precipitates due to flocculation. The first silicate and other raw materials are compounded in a specific proportion and limited to serve as a coking inhibitor, which effectively reduces the viscosity of the above-mentioned coking products, makes the coking body brittle and easy to clean, and reduces the thickness of the coking body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained like these drawings without paying creative work.

[0021] Figure 1 This is a comparison diagram before and after the waste heat boiler ash treatment using the coking inhibitor of Example 7.

[0022] Figure 2 This is a comparison chart before and after the treatment of ash accumulation in the side-blowing furnace surface cooler using the coking inhibitor of Example 23. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0025] The term "and / or" used herein includes any one of two or more related listed items, and also includes any and all combinations of the related listed items, wherein the any and all combinations include any combination of two related listed items, any more related listed items, or all related listed items. For example, "A and / or B" includes three parallel solutions: A, B, and "a combination of A and B".

[0026] In this article, unless otherwise specified, "one or more" means any one of the listed items or any combination of the listed items. Similarly, "one or more" and other expressions that mean "one or more" are also understood in the same way unless otherwise specified.

[0027] In this document, "further", "further", "particularly", "for example", "such as", "example", "for example", etc. are used for descriptive purposes, indicating that the previous and subsequent technical solutions are related in terms of the content covered, but should not be understood as limiting the previous technical solution, nor can they be understood as limiting the scope of protection of this document. In this document, unless otherwise specified, A (such as B) means that B is a non-limiting example of A, and it can be understood that A is not limited to B.

[0028] Herein, "optionally", "optional", and "optional" mean optional, that is, any one of the two parallel schemes of "yes" or "no". If multiple "optional" items appear in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "optional" item is independent of each other. In this application, descriptions such as "optionally contain", "optionally include", etc. mean "contain or not contain". "Optional component X" means that component X exists or does not exist, or means that component X is contained or not contained.

[0029] In this document, the terms "first", "second", "third", "fourth", etc. in "the first aspect", "the second aspect", "the third aspect", "the fourth aspect", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or quantity, nor can they be understood as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first", "second", "third", "fourth", etc. only serve the purpose of non-exhaustive enumeration and description, and it should be understood that they do not constitute a closed limitation on quantity.

[0030] In this article, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0031] Herein, when it comes to a numerical interval (i.e., a numerical range), unless otherwise specified, the distribution of the optional numerical values ​​within the numerical interval is considered to be continuous and includes the two numerical endpoints (i.e., the minimum and maximum values) of the numerical interval, and each numerical value between the two numerical endpoints. Unless otherwise specified, when a numerical interval only refers to integers within the numerical interval, including the two endpoint integers of the numerical range, and each integer between the two endpoints, is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be combined. In other words, unless otherwise specified, the numerical ranges disclosed herein should be understood to include any and all sub-ranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. "Numerical interval" allows broadly including numerical interval types such as percentage intervals, ratio intervals, and ratio intervals.

[0032] Herein, the term "room temperature" or "normal temperature" generally refers to 4°C to 35°C, for example, 20°C ± 5°C. In some embodiments herein, "room temperature" or "normal temperature" refers to 10°C to 30°C. In some embodiments herein, "room temperature" or "normal temperature" refers to 20°C to 30°C.

[0033] In this article, if there are multiple steps involved in the method flow, unless there is a clear different description in this article, there is no strict order restriction for the execution of these steps, and they can be executed in other orders than described. Moreover, any step can include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn, alternating or simultaneously with other steps or parts of sub-steps or stages of other steps.

[0034] The present application provides a coking inhibitor, which comprises, by mass percentage, 30% to 70% of a first silicate and 30% to 70% of other raw materials;

[0035] The first silicate includes one or more of kaolin, metakaolin, washed kaolin and white mud;

[0036] Other raw materials include a second silicate and one or two of an oxide;

[0037] The second silicate includes one or more of chlorite, serpentine, talc, asbestos, mica and vermiculite;

[0038] The oxide includes one or both of silicon oxide and iron oxide.

[0039] Kaolin, theoretical chemical formula: Al2 [(OH)4 / Si2O5], is a non-metallic mineral, a type of clay and clay rock mainly composed of kaolinite clay minerals.

[0040] Metakaolin is an anhydrous aluminum silicate (Al2O3·2SiO2, referred to as AS2) formed by dehydration of kaolin (Al2O3·2SiO2·2H2O, referred to as AS2H2) at an appropriate temperature (600-900 ℃).

[0041] Washed kaolin is a type of kaolin that has been washed. Kaolin is clay or clay rock mainly composed of kaolinite clay minerals. The washing process is mainly to remove impurities in kaolin, such as quartz, feldspar, mica and other mineral impurities as well as some organic impurities.

[0042] White mud minerals are composed of kaolinite cluster minerals such as kaolinite, dickite, nacre, and halloysite, with kaolinite being the main mineral component.

[0043] Chlorite can be expressed as Y3[Z4O 10 ](OH)2·Y3(OH)6, a general term for a family of layered silicate minerals with monoclinic, triclinic or orthorhombic crystal systems. In the chemical formula, Y mainly represents Mg 2+ , Fe 2+ 、Al 3+ and Fe 3+ In some mineral species (such as nickel chlorite, manganese chlorite, lithium borate chlorite, etc.), it can also be Cr, Ni, Mn, V, Cu or Li; Z is mainly Si and Al, and occasionally Fe 3+ or B 3+ .

[0044] Serpentine mainly contains (Mg, Fe, Ni)3Si2O5(OH)4, and common associated minerals include calcite, talc, magnetite, etc.

[0045] Talc mainly contains hydrous magnesium silicate, which is a trioctahedral mineral with the structural formula (Mg6)[Si8]O 20 (OH)4.

[0046] Asbestos, also known as "asbestos fiber", is a general term for certain silicate minerals that can be split into elastic fibers. Chemical formula: 3MgO·2SiO2·2H2O, fibrous, green-yellow or white.

[0047] Vermiculite is a hydrous aluminum silicate mineral with complex chemical composition. The chemical formula is: (Mg, Ca) 0.7 (Mg,Fe 3+ ,Al)6[(Si,Al)8O 20 ](OH)4·8H2O. It contains chemical components MgO, Fe2O3, FeO, SiO2, Al2O3, H2O, K2O, as well as Li, Ti, Cr, Ni, etc.

[0048] In a specific example, the composition of the coking inhibitor includes, by mass percentage, 30% to 70% of the first silicate, 15% to 40% of the second silicate, and 8% to 35% of the oxide.

[0049] In a specific example, the composition of the coking inhibitor includes, by mass percentage, 50% to 70% of the first silicate, 15% to 25% of the second silicate, and 8% to 25% of iron oxide. Further, the second silicate may be, but is not limited to, chlorite.

[0050] It can be understood that the iron oxide includes one or both of ferric oxide and ferrous oxide.

[0051] The particle size of the iron oxide is 400 mesh to 1300 mesh. Specifically, the particle size of the iron oxide can be, but is not limited to, 400 mesh, 500 mesh, 600 mesh, 700 mesh, 800 mesh, 900 mesh, 1000 mesh, 1100 mesh, 1200 mesh, 1250 mesh or 1300 mesh.

[0052] In a specific example, the composition of the coking inhibitor includes, by mass percentage, 30% to 70% of a first silicate, 15% to 40% of a second silicate, and 15% to 35% of silicon oxide. Further, the second silicate may be, but is not limited to, one or both of serpentine and chlorite.

[0053] It can be understood that silicon oxide includes one or more of silicon dioxide, microsilica powder, powdered quartz and fused quartz.

[0054] Microsilica powder, also known as silica fume, is a powder material with amorphous silicon dioxide as the main component obtained by oxidizing the silicon vapor discharged through the flue during the smelting of ferrosilicon alloy or industrial silicon and collecting it through a dust collector.

[0055] Powdered quartz is a natural powdered quartz with extremely fine particles and high silicon dioxide content. Compared with traditional siliceous rock, it has the characteristics of fine particle size, loose structure and easy processing. The chemical composition is mainly silicon dioxide, the content of which can generally reach 95%-98%, followed by impurities such as iron, magnesium, aluminum and calcium.

[0056] Fused quartz is an amorphous (glassy) form of silicon oxide (quartz, silica).

[0057] The particle size of silicon oxide is 300-9000 mesh. Specifically, the particle size of silicon oxide can be, but is not limited to, 300 mesh, 325 mesh, 350 mesh, 400 mesh, 450 mesh, 500 mesh, 600 mesh, 700 mesh, 800 mesh, 1000 mesh, 2000 mesh, 3000 mesh, 4000 mesh, 5000 mesh, 6000 mesh, 7000 mesh, 8000 mesh or 9000 mesh.

[0058] In a specific example, the composition of the coking inhibitor includes 30% to 40% of the first silicate and 60% to 70% of the second silicate by mass percentage. Further, the composition of the coking inhibitor includes 30% to 35% of the first silicate and 65% to 70% of the second silicate by mass percentage.

[0059] In a specific example, the second silicate includes one or more of talc, vermiculite, serpentine, asbestos, and mica.

[0060] Specifically, the second silicate includes one of talc and vermiculite, talc and asbestos, vermiculite and asbestos, serpentine and asbestos, serpentine and talc, talc and mica, vermiculite and serpentine, mica and asbestos, and a combination of serpentine and mica in a mass ratio of (1~3): (1~3).

[0061] In a specific example, the particle size of the first silicate is 100 mesh to 1300 mesh. The particle size of the first silicate may be, but is not limited to, 100 mesh, 200 mesh, 300 mesh, 400 mesh, 500 mesh, 600 mesh, 700 mesh, 800 mesh, 900 mesh, 1000 mesh, 1100 mesh, 1150 mesh, 1200 mesh, 1250 mesh or 1300 mesh.

[0062] The present application also provides a method for using a coking inhibitor, comprising the following steps: adding the above-mentioned coking inhibitor into a coked body.

[0063] In a specific example, the mass ratio of the amount of coking inhibitor added to the fuel is (0.3~1):1000. It can be understood that the coking inhibitor is sprayed into the coking body by compressed air, wherein the mass ratio of the amount of coking inhibitor added to the fuel is (0.3~1):1000. Further, the mass ratio of the amount of coking inhibitor added to the fuel may be, but is not limited to, 0.3:1000, 0.4:1000, 0.5:1000, 0.6:1000, 0.7:1000, 0.8:1000, 0.9:1000 or 1:1000. The above-mentioned fuel may be, but is not limited to, one or more of coal, mineral material and garbage, for example, coal burning means that the fuel is coal, metallurgical furnace means that the fuel is mineral material, and garbage incinerator means that the fuel is garbage.

[0064] Furthermore, the present application provides the use of the above-mentioned coking inhibitor in treating coking in the ascending flue or side-blown furnace of a metal smelter.

[0065] Specifically, the present application provides the use of the above-mentioned coking inhibitor in treating coking at the inlet of a side-blown furnace.

[0066] Furthermore, the present application provides the use of the above-mentioned coking inhibitor in treating ash accumulation in a waste heat boiler or a side-blown furnace surface cooler of a metal smelter.

[0067] Specifically, the present application provides the use of the above-mentioned coking inhibitor in treating ash accumulation at the inlet of the surface cooler of a side-blown furnace.

[0068] It can be understood that coke bodies include coke and ash accumulation. Specifically, boiler coke: has a hard texture and is difficult to remove. It appears as a relatively hard and sticky block, which may form a continuous layered structure and firmly adhere to the heating surface or furnace wall. Boiler ash accumulation: is relatively loose and relatively easy to remove. It is mostly a loose accumulation of ash particles with relatively irregular shapes and weak adhesion.

[0069] The present application targets the coking type of the Kingery model, which has high viscosity, strong wettability of the solution to solid particles, and contains large-particle electrolytes to form a high-concentration sol, which aggregates and precipitates due to flocculation. The first silicate and other raw materials are compounded in a specific proportion and limited to serve as a coking inhibitor, which effectively reduces the viscosity of the above-mentioned coking products, makes the coking body brittle and easy to clean, and reduces the thickness of the coking body.

[0070] The following further specific examples are provided to explain the present application in detail. It should also be understood that the following examples are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Some non-essential improvements and adjustments made by those skilled in the art such as the above content of the present application belong to the scope of protection of the present application. The specific process parameters of the following embodiments are also only an example within a suitable range, that is, those skilled in the art can make a selection within a suitable range through the description herein, and are not necessarily limited to the specific values ​​of the embodiments below.

[0071] Kaolin was purchased from Hengda Kaolin Material Factory, Xiangcheng District, Suzhou, with a particle size of 200 mesh; metakaolin was purchased from Yukun Mining Co., Ltd., Jiaozuo, with a particle size of 1250 mesh; washed kaolin was purchased from Chengdu Tongdeli Technology Co., Ltd., with a particle size of 1000 mesh; white mud was purchased from Jinpinwang Mining Co., Ltd., Nanning, Guangxi, with a particle size of 200 mesh; chlorite was purchased from Haicheng Hetai Powder Technology Co., Ltd., with a particle size of 600 mesh; ferric oxide: Zibo Zichuan Liqiang Pigment Co., Ltd., with a particle size of 500 mesh; ferrous oxide was purchased from Daye Jinpeng Friction Material Co., Ltd., with a particle size of 1250 mesh; talc was purchased from Chengxin Microfine Stone Powder Factory, Haicheng, with a particle size of 800 mesh; vermiculite was purchased from Shijiazhuang Chenxing Industrial Co., Ltd., with a particle size of 325 mesh; The mother stone was purchased from Hebei Huayuan Mining Co., Ltd. with a particle size of 400 mesh; serpentine was purchased from Jiangxi Yiyang Zhongya Mining Co., Ltd. with a particle size of 200 mesh; asbestos was purchased from Dunhuang Senxin Mining Co., Ltd. with a particle size of 400 mesh; silicon dioxide was purchased from Yifeng Mining Technology (Dongyuan) Co., Ltd. with a particle size of 600 mesh; microsilica was purchased from Chengdu Donglanxing Technology Development Co., Ltd. with a particle size of 8000 mesh; powder quartz was purchased from Majiang County Jingfa Mining Co., Ltd. with a particle size of 325 mesh; fused quartz was purchased from Lianyungang Hongding Quartz Co., Ltd. with a particle size of 400 mesh; bentonite was purchased from Gansu Hongquan Bentonite Co., Ltd. with a particle size of 200 mesh; montmorillonite was purchased from Inner Mongolia Ningcheng Tianyu Bentonite Technology Co., Ltd. with a particle size of 325 mesh.

[0072] Example 1

[0073] The composition of the coking inhibitor provided in this embodiment includes, by mass percentage, 60% kaolin, 20% chlorite and 20% ferric oxide. The above raw materials are prepared and put into a mixer for uniform mixing.

[0074] The formulas of other embodiments and comparative examples are shown in Table 1 below. The preparation method is the same as that of Example 1. The coking inhibitors of the above embodiments and comparative examples are respectively sprayed onto the coked body in the coking area by compressed air at a ratio of 0.5:1000. It can be understood that the difference between each embodiment and comparative example is only the composition of the coking inhibitor.

[0075] Table 1

[0076]

[0077] The data of the above-mentioned coking inhibitors after being used in the coking area are summarized in Table 2 and Table 3, where the data in the ascending flue of the lead smelter in Table 2 and Table 3 specifically refer to the coking thickness corresponding to the ascending flue and the flue outlet temperature. The lower the flue outlet temperature and the smaller the coking thickness formed, the better the effect. For the operation cycle of the zinc smelting boiling furnace waste heat boiler and the cleaning time required in the corresponding operation cycle. The longer the operation time but the shorter the time required for cleaning, the better the effect of the coking inhibitor. For the scraper ash morphology and scraper ash color in a certain secondary lead side-blown furnace boiler, the lower the ash hardness, the better the effect when it turns gray or white. For the precious metal side-blown furnace surface cooler inlet diameter of about 150cm, the larger the residual channel for ash accumulation, the easier it is, and the longer the operation time, the better the effect of the coking inhibitor.

[0078] Table 2

[0079]

[0080] Table 3

[0081]

[0082] Before the coking inhibitor provided by this application was tested, the ascending flue was severely coked, the coke blocks were hard, and they adhered too strongly to the flue wall, affecting the heat exchange efficiency. When the furnace was started, the flue outlet temperature was about 770°C. After running for about 7 days, the flue outlet temperature was as high as 830°C due to coking in the flue. After adding the coking inhibitor of this application, the heat exchange efficiency was significantly improved, the operation cycle was extended, and the flue outlet temperature could be stabilized below 800°C. Moreover, after the furnace was shut down, the coke blocks in the flue became very thin (from the original 50cm to 5cm), the coke blocks became brittle, had low adhesion, and were easy to clean.

[0083] The coking inhibitor provided by the present application was used to conduct an experiment on the treatment of ash accumulation in the waste heat boiler of a zinc smelting boiling furnace. Compared with the coking body before the experiment, it became loose and easy to clean. The old coke accumulated during the operation became thinner as a whole in the test tube bundle, and there was an obvious shedding phenomenon. The time consumption for cleaning was reduced. Before the test, in order to maintain normal production, manual cleaning was required after about 7 days of operation, and each time took 6 to 8 hours. After the test using the coking inhibitor of the present application, no manual cleaning was required. The operation cycle was extended. By adding the coking inhibitor of the present application, the boiler was guaranteed to operate continuously for 17 days without dust removal. If there are no other external factors causing the shutdown, the boiler can continue to operate. The safety risk is reduced. Manual dust cleaning is prone to personal safety accidents, and the intensity of cleaning work is reduced, which fundamentally reduces safety hazards.

[0084] The coking inhibitor provided in the present application was used to carry out an experiment on treating ash accumulation in a waste heat boiler of a lead regeneration side-blown furnace. The coking treatment was carried out on the slope at the inlet of the waste heat boiler. The hardness of the slag blocks was reduced, becoming crisp and dry, and the large hard slag blocks were turned into small slag blocks or even powdered slag. No large slag blocks fell in the later stage of the experiment, and the color of the ash slag also changed from black before the experiment to gray or white, making it easy to clean.

[0085] The coking inhibitor provided in this application has a small inlet diameter of about 150 cm for the surface cooler, which is easy to be blocked by dust accumulation. In severe cases, the furnace is shut down after only 4.5 days of operation, and the inlet diameter is only 40 cm. After adding the coking inhibitor, the ash slag changes from the original ash particles and blocks to ash. The furnace is shut down due to other problems after 16 days of operation, and the inlet diameter is still 120 cm.

[0086] like Figure 1 as well as Figure 2 As shown, there are pictures of the changes in the coking bodies before and after the coking inhibitor of the present application is added in Example 7 and Example 23. It can be seen that the coking inhibitor provided by the present application can effectively remove the coking bodies.

[0087] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The above-described embodiments only express several implementation methods of the present application, which is convenient for understanding the technical solution of the present application in detail, but it cannot be understood as limiting the scope of protection of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the scope of protection of the present application. It should be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the technical solutions provided in the present application are all within the scope of protection of the claims attached to the present application. Therefore, the scope of protection of the patent of this application shall be based on the content of the attached claims, and the description can be used to interpret the content of the claims.

Claims

1. A coking inhibitor, characterized in that: The composition comprises 30% to 70% of a first silicate and 30% to 70% of other raw materials in terms of mass percentage; The first silicate comprises one or more of kaolin, metakaolin, washed kaolin and white mud; The other raw materials include one or two of a second silicate and an oxide; The second silicate includes one or more of chlorite, serpentine, talc, asbestos, mica and vermiculite; The oxide includes one or both of silicon oxide and iron oxide.

2. The coking inhibitor according to claim 1, characterized in that The coking inhibitor comprises, by mass percentage, 30% to 70% of the first silicate, 15% to 40% of the second silicate, and 8% to 35% of the oxide.

3. The coking inhibitor according to claim 2, characterized in that The coking inhibitor comprises, by mass percentage, 50% to 70% of the first silicate, 15% to 25% of the second silicate, and 8% to 25% of the iron oxide.

4. The coking inhibitor according to claim 2, characterized in that The coking inhibitor comprises, by mass percentage, 30% to 70% of the first silicate, 15% to 40% of the second silicate, and 15% to 35% of the silicon oxide.

5. The coking inhibitor according to claim 1, characterized in that 30% to 40% of the first silicate and 60% to 70% of the second silicate.

6. The coking inhibitor according to claim 5, characterized in that The second silicate includes one or more of talc, vermiculite, serpentine, asbestos and mica.

7. The coking inhibitor according to any one of claims 1 to 6, characterized in that The particle size of the first silicate is 100 mesh to 1300 mesh.

8. A method for using a coking inhibitor, characterized in that: The method comprises the following steps: adding the coking inhibitor according to any one of claims 1 to 7 into the coking body.

9. Use of the coking inhibitor according to any one of claims 1 to 7 in treating coking in an ascending flue or a side-blown furnace of a metal smelter.

10. Use of the coking inhibitor according to any one of claims 1 to 7 in treating dust accumulation in a waste heat boiler or a side-blown furnace surface cooler of a metal smelting plant.

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