An adhesive for industrial powder briquetting and a preparation method thereof

Abstract

The application provides an industrial powder ball pressing adhesive and a preparation method, relates to the technical field of industrial coke powder ball production, and comprises the following steps: S1, taking raw materials in proper amounts, wherein the raw materials include starch, a high molecular polymer, a silico-aluminate, water, xanthan gum, calcium oxide, reinforcing strips and an adhesive, and mixing the raw materials to prepare a base material; and S2, mixing the base material with a type A fixing agent and a type B fixing agent respectively to prepare a type A mixture and a type B mixture. The industrial powder ball pressing adhesive and the preparation method can mix the type A reinforcing agent and the type B reinforcing agent with coke powder, can effectively improve the hardness of the carbon-containing ball, can quickly decompose at high temperatures in the subsequent use process to improve the use efficiency of the carbon-containing ball, and can effectively improve the internal structure of the carbon-containing ball by adding the reinforcing strips in the processing process.

Description

Technical Field

[0001] This invention relates to the field of industrial coke powder pelletizing technology, specifically to an adhesive for industrial powder pelletizing and its preparation method. Background Technology

[0002] Coke powder pellets are coal products made from pulverized coal as the main raw material. They are produced by mechanical processing and pressing according to the specific proportions, mechanical strength, and shape and size required for the application. They have a certain strength and various sizes and shapes. They are often used in steelmaking and ironmaking in industrial production. During the refining process, they can reduce production costs and quickly carry out oxidation-reduction reactions with iron powder.

[0003] However, in actual use, the production and finished products of carbon-containing pellets commonly found on the market currently have two major defects. First, the overall hardness is low. After the carbon-containing pellets are produced, they need to be transported and used in boilers. However, the low hardness of the carbon-containing pellets during handling means that the accumulation of a large number of carbon-containing pellets will cause the lower-lying pellets to bear greater pressure and become damaged. Second, the internal toughness of carbon-containing pellets is low. They are easily broken when they collide with each other during transportation and use. Due to these two defects, common carbon-containing pellets are inconvenient to transport and have a high rate of damage during transportation. Summary of the Invention

[0004] The present invention aims to overcome the shortcomings of the prior art by providing an adhesive for industrial powder briquetting and its preparation method, thereby solving the problem of common carbon-containing pellets being easily damaged due to their low hardness and toughness.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an adhesive for industrial powder briquetting and its preparation method, comprising:

[0006] S1. Take appropriate amounts of raw materials, including starch, polymer, aluminosilicate, water, xanthan gum, calcium oxide, reinforcing strips and adhesives, and mix them to form a base material by weight.

[0007] S2. Mix the above base material with type A fixative and type B fixative respectively to form type A mixture and type B mixture respectively;

[0008] S3. The coke powder is sieved and the coke powder with excessively large particles is ground into finer particles to control the particle size of the coke powder.

[0009] S4. Coke powder is separately mixed with type A mixture and type B mixture to prepare type A raw material and type B raw material respectively, and the mixture is stirred thoroughly.

[0010] S5. Mix raw materials of type A and type B together in a 1:1 ratio to form a mixed raw material;

[0011] S6. Press the mixed raw materials into the mold, apply pressure and heat to 60°C, and complete the molding process in 20 minutes.

[0012] Step S1 specifically includes the following steps:

[0013] S11. The raw material ratio of the mixed base material is as follows, measured by weight: starch 10-15 parts, polymer 3-5 parts, aluminosilicate 4-7 parts, water 2-4 parts, xanthan gum 5-7 parts, calcium oxide 10-12 parts, and reinforcing strip 2-4 parts.

[0014] S12. The material of the reinforcing strip is wood fiber material such as paper or bark. The wood fiber material is torn into strips using a paper shredder or strip tearing method.

[0015] S13. The raw material ratio of the adhesive is as follows, measured by weight: 20-100 parts water, 3-6 parts water-soluble flocculant, 3-5 parts carbon monoxide combustion aid RH series, 20-50 parts clay, 10-30 parts calcium oxide, 12-30 parts carboxymethyl cellulose, and 5-30 parts desiccant.

[0016] S14. Add water to the reactor and heat to 60 degrees Celsius. Then add clay, calcium oxide, and carboxymethyl cellulose evenly to the reactor and stir. Heat to 80-90 degrees Celsius. After 30 minutes, add carbon monoxide combustion aid and continue heating for 15 minutes. Cool down to 60 degrees Celsius, add the weighed water-soluble flocculant and continue heating for 20 minutes. When the temperature in the reactor drops to room temperature, add desiccant and grind to an appropriate particle size to obtain the adhesive.

[0017] Step S2 specifically includes the following steps:

[0018] S21. By weight, the raw material of the Class A fixative is 20-24 parts epoxy resin and 1-5 parts filler, and the filler can be made of silica gel, glass beads, alumina powder and aluminum foil powder as raw materials for grinding.

[0019] S22. By weight, the raw materials of the Class B fixative are 40-50 parts of curing agent and 1-2 parts of additives. The curing agent can be an amine, anhydride or amide, and the additives can be accelerators, diluents, antioxidants and anti-precipitants.

[0020] Step S3 specifically includes the following steps:

[0021] S31. Sieve the coke powder through an 800-mesh filter to separate the sieved powder from the non-sieved powder.

[0022] S32. Put the non-sieved powder into the grinder and grind it at 5000 r / min for 5 min to obtain fine coke powder. Then sieve the coke powder again and repeat the above process until all the coke powder is sieved.

[0023] Step S4 specifically includes the following steps:

[0024] S41. Divide the coke powder into two equal weight portions in a 1:1 ratio using a weight-bearing method;

[0025] S42. Mix the two portions of coke powder with type A fixative and type B fixative respectively, and put them into a mixer and stir at 1000 r / min for 10 min.

[0026] Step S6 specifically includes the following steps:

[0027] S61. The mold adopts an elliptical spherical mold, and the major axis of the ellipse is less than 6cm;

[0028] S62. The pressure applied after filling the mold is 80-100 MPa.

[0029] This invention provides an adhesive for industrial powder briquetting and its preparation method, which has the following beneficial effects:

[0030] The advantage of this invention is that by mixing type A and type B reinforcing agents with coke powder, the hardness of carbon-containing pellets can be effectively improved. At the same time, they can also be rapidly decomposed at high temperatures during subsequent use to improve the utilization efficiency of carbon-containing pellets.

[0031] Secondly, reinforcing strips are added during the processing and mixing. Under effective proportions, the internal structure of the carbon-containing pellets can have a mutual traction effect, making them less prone to cracking. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall process of the present invention.

[0033] Figure 2 This is a schematic diagram of the S1 process of the present invention.

[0034] Figure 3 This is a schematic diagram of the S2 process of the present invention.

[0035] Figure 4 This is a schematic diagram of the S3 process of the present invention.

[0036] Figure 5 This is a schematic diagram of the S4 process of the present invention.

[0037] Figure 6 This is a schematic diagram of the S6 process of the present invention. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0039] This application provides an adhesive for industrial powder briquetting and its preparation method. This adhesive and method utilize a mixture of type A and type B reinforcing agents with coke powder to effectively improve the hardness of carbon-containing briquettes. Furthermore, during subsequent use, it rapidly decomposes at high temperatures, enhancing the efficiency of the carbon-containing briquettes. The addition of reinforcing strips during the manufacturing and mixing process, under appropriate proportions, allows the internal structure of the carbon-containing briquettes to have mutual traction, reducing the likelihood of breakage. The following provides a detailed description of the adhesive and its preparation method for industrial powder briquetting. It should be noted that the order of description in the following embodiments is not intended to limit the preferred order of the embodiments.

[0040] This application will now be described in detail with reference to the accompanying drawings and specific embodiments. Please refer to... Figure 1-6 This embodiment provides an adhesive for industrial powder briquetting and its preparation method, comprising:

[0041] S1. Take appropriate amounts of raw materials, including starch, polymer, aluminosilicate, water, xanthan gum, calcium oxide, reinforcing strips and adhesives, and mix them to form a base material by weight.

[0042] S2. Mix the above base material with type A fixative and type B fixative respectively to form type A mixture and type B mixture respectively;

[0043] S3. The coke powder is sieved and the coke powder with excessively large particles is ground into finer particles to control the particle size of the coke powder.

[0044] S4. Coke powder is separately mixed with type A mixture and type B mixture to prepare type A raw material and type B raw material respectively, and the mixture is stirred thoroughly.

[0045] S5. Mix raw materials of type A and type B together in a 1:1 ratio to form a mixed raw material;

[0046] S6. Press the mixed raw materials into the mold, apply pressure and heat to 60°C, and complete the molding process in 20 minutes.

[0047] Step S1 specifically includes the following steps:

[0048] S11. The raw material ratio of the mixed base material is as follows, measured by weight: starch 10-15 parts, polymer 3-5 parts, aluminosilicate 4-7 parts, water 2-4 parts, xanthan gum 5-7 parts, calcium oxide 10-12 parts, and reinforcing strip 2-4 parts.

[0049] S12. The material of the reinforcing strip is wood fiber material such as paper or bark. The wood fiber material is torn into strips using a paper shredder or strip tearing method.

[0050] After the mixing process is completed, the strip-shaped wood material will be mixed inside the carbon powder ball. At this time, the reinforcing strip can provide traction. When the carbon ball is transported and squeezed, mutual traction force will be generated inside. Under the action of traction force, the carbon ball is less likely to separate and break, thus improving the overall strength of the carbon ball.

[0051] S13. The raw material ratio of the adhesive is as follows, measured by weight: 20-100 parts water, 3-6 parts water-soluble flocculant, 3-5 parts carbon monoxide combustion aid RH series, 20-50 parts clay, 10-30 parts calcium oxide, 12-30 parts carboxymethyl cellulose, and 5-30 parts desiccant.

[0052] S14. Add water to the reactor and heat to 60 degrees Celsius. Then add clay, calcium oxide, and carboxymethyl cellulose evenly to the reactor and stir. Heat to 80-90 degrees Celsius. After 30 minutes, add carbon monoxide combustion aid and continue heating for 15 minutes. Cool down to 60 degrees Celsius, add the weighed water-soluble flocculant and continue heating for 20 minutes. When the temperature in the reactor drops to room temperature, add desiccant and grind to an appropriate particle size to obtain the adhesive.

[0053] Step S2 specifically includes the following steps:

[0054] S21. By weight, the raw material of the Class A fixative is 20-24 parts epoxy resin and 1-5 parts filler, and the filler can be made of silica gel, glass beads, alumina powder and aluminum foil powder as raw materials for grinding.

[0055] Using epoxy resin as the main component of Class A fixative provides good adhesion, while fillers can increase the stability and overall toughness of Class A fixative.

[0056] S22. By weight, the raw materials of the Class B fixative are 40-50 parts of curing agent and 1-2 parts of additives. The curing agent can be an amine, anhydride or amide, and the additives can be accelerators, diluents, antioxidants and anti-precipitants.

[0057] Step S3 specifically includes the following steps:

[0058] S31. Sieve the coke powder through an 800-mesh filter to separate the sieved powder from the non-sieved powder.

[0059] S32. Put the non-sieved powder into the grinder and grind it at 5000r / min for 5min to obtain fine coke powder. Then sieve the coke powder again and repeat the above process until all the coke powder is sieved.

[0060] By continuously sieving coke powder through the above process, sufficiently refined coke powder material can be obtained. In subsequent use, when the coke powder material is broken down, it can participate more quickly in the reduction reaction of iron ore powder.

[0061] Step S4 specifically includes the following steps:

[0062] S41. Divide the coke powder into two equal weight portions in a 1:1 ratio using a weight-bearing method;

[0063] S42. Mix the two portions of coke powder with type A fixative and type B fixative respectively, and put them into a mixer and stir at 1000 r / min for 10 min.

[0064] The above steps allow the two coke powders to be fully mixed with type A and type B fixatives. After mixing, type A and type B mixtures can be blended together. After blending, the epoxy resin in type A mixture and the curing agent in type B mixture are fully fused together and produce a curing reaction. Under the curing reaction, the strength of the carbon pellets after molding can be improved.

[0065] Meanwhile, since both type A and type B fixatives are provided with hardness through epoxy resin, their temperature resistance is 60℃-200℃. Under high-temperature refining, they can decompose rapidly, allowing the coke powder to decompose more quickly and participate in the reaction.

[0066] Step S6 specifically includes the following steps:

[0067] S61. The mold adopts an elliptical spherical mold, and the major axis of the ellipse is less than 6cm;

[0068] S62. The pressure applied after filling the mold is 80-100 MPa;

[0069] Using the above dimensions, smaller carbon pellets with higher compressibility can be produced. During use, smaller carbon pellets are more likely to accept heat and decompose, thereby improving processing efficiency and allowing them to participate in the reduction reaction of iron ore powder more quickly.

[0070] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0071] The above provides a detailed description of an industrial powder briquetting adhesive and its preparation method provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0072] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0073] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. A method for preparing industrial powder briquettes, characterized in that, include: S1. Take appropriate amounts of raw materials, including starch, polymer, aluminosilicate, water, xanthan gum, calcium oxide, reinforcing strips and adhesives, and mix them to form a base material by weight. S2. Mix the above base material with type A fixative and type B fixative respectively to form type A mixture and type B mixture respectively; S3. The coke powder is sieved and the coke powder with excessively large particles is ground into finer particles to control the particle size of the coke powder. S4. Coke powder is separately mixed with type A mixture and type B mixture to prepare type A raw material and type B raw material respectively, and the mixture is stirred thoroughly. S5. Mix raw materials of type A and type B together in a 1:1 ratio to form a mixed raw material; S6. Press the mixed raw materials into the mold, apply pressure and heat to 60°C, and complete the molding after 20 minutes. Specifically, step S1 includes the following steps: S11. The raw material ratio of the mixed base material is as follows, measured by weight: starch 10-15 parts, polymer 3-5 parts, aluminosilicate 4-7 parts, water 2-4 parts, xanthan gum 5-7 parts, calcium oxide 10-12 parts, and reinforcing strip 2-4 parts. S12. The reinforcing strip is made of wood fiber material such as paper or bark. The wood fiber material is torn into strips using a paper shredder or tearing method. S13. The raw material ratio of the adhesive is as follows, measured by weight: 20-100 parts water, 3-6 parts water-soluble flocculant, 3-5 parts carbon monoxide combustion aid RH series, 20-50 parts clay, 10-30 parts calcium oxide, 12-30 parts carboxymethyl cellulose, and 5-30 parts desiccant. S14. Add water to the reaction vessel and heat to 60°C. Then add clay, calcium oxide, and carboxymethyl cellulose evenly to the reaction vessel and heat to 80-90°C. After 30 minutes, add carbon monoxide combustion aid and continue heating for 15 minutes. Cool down to 60°C, add the weighed water-soluble flocculant and continue heating for 20 minutes. When the temperature in the reaction vessel drops to room temperature, add desiccant and grind to an appropriate particle size to obtain the adhesive. Step S2 specifically includes the following steps: S21. The raw material of the Class A fixative is 20-24 parts epoxy resin and 1-5 parts filler, and the filler is made of silica gel, glass beads, alumina powder and aluminum foil powder as raw materials for grinding. S22. By weight, the raw materials of the Class B fixative are 40-50 parts of curing agent and 1-2 parts of additives. The curing agent is selected from amines, acid anhydrides and amides, and the additives are selected from accelerators, diluents, antioxidants and anti-precipitants. Specifically, step S3 includes the following steps: S31. Sieve the coke powder through an 800-mesh filter to separate the sieved powder from the non-sieved powder. S32. Put the non-sieved powder into the grinder and grind it at 5000 r / min for 5 min to obtain fine coke powder. Then sieve the coke powder again and repeat the above process until all the coke powder is sieved. Step S4 specifically includes the following steps: S41. Divide the coke powder into two equal weight portions with a 1:1 ratio by weighing. S42. Mix the two portions of coke powder with type A fixative and type B fixative respectively, and put them into a mixer and stir at 1000 r / min for 10 min. Step S6 specifically includes the following steps: S61. The mold adopts an elliptical spherical mold, and the major axis of the ellipse is less than 6 cm; S62, the pressure after filling the mold is 80-100 MPa.

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