CN111154278A - Method for preparing high-strength formed coke by cold press molding - Google Patents
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
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- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B30/00—Preparation of starch, degraded or non-chemically modified starch, amylose, or amylopectin
- C08B30/12—Degraded, destructured or non-chemically modified starch, e.g. mechanically, enzymatically or by irradiation; Bleaching of starch
- C08B30/18—Dextrin, e.g. yellow canari, white dextrin, amylodextrin or maltodextrin; Methods of depolymerisation, e.g. by irradiation or mechanically
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08K2003/222—Magnesia, i.e. magnesium oxide
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- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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Abstract
The invention relates to a formed coke molding process and discloses a method for preparing high-strength formed coke through cold press molding. The mass ratio of the used binder is as follows: 0-20 parts of corn starch, 60-80 parts of asphalt, 0-5 parts of artificial graphite or boron compound, 0-10 parts of cement or magnesium oxide, 0-20 parts of ethyl acetate and 0-2 parts of sodium hydroxide. The total proportion of the binder is 8.6-10.7% of the mass of the coke powder. Mixing the mixed binder and coke powder (metallurgical coke or petroleum coke) uniformly in advance, adding a certain amount of water, and performing cold press molding at normal temperature to obtain formed coke. The formed coke prepared by the invention has the excellent characteristics of high cold and hot strength, good thermal stability, high forming rate, low cost and the like.
Description
Technical Field
The invention belongs to a formed coke forming process, and relates to a method for preparing formed coke with high cold and hot strength by mixing a binder and coke powder at normal temperature and then pressing and forming.
Background
The asphalt is an organic binder commonly used in the production of the formed coke, wherein β resin can provide the cold strength of the formed coke, high-temperature carbonization forms a carbon skeleton to provide the hot strength of the formed coke, but the asphalt is solid at normal temperature and does not have any bonding property, and needs to be heated to above a melting point to play a role of a bonding agent, Chinese patent application No. CN201210139885.4 indicates that the traditional asphalt adding mode is that asphalt is melted under the condition (140 plus 180 ℃) far higher than a softening point (for example, a medium-temperature asphalt softening point is 75-95 ℃) and then is sprayed into stirring equipment containing solid materials through a pressure nozzle to be stirred and mixed uniformly, meanwhile, in order to prevent the asphalt from being solidified due to cooling, gelatinization and heat preservation treatment can be carried out in the stirring process, thus, sufficient infiltration and uniform mixing between the asphalt and the solid materials are ensured, and the asphalt is continued to be carried out, and then hot pressing is carried out, the process operation and the solidification of the asphalt are prevented from being solidified due to the fact that the asphalt is changed into gelatinization and gelatinization only needs to be carried out during the gelatinization and gelatinization treatment of the gelatinization of the asphalt under the stirring process of the high-temperature of the asphalt, and the starch, which is required to improve the high-temperature carbonization of the high-temperature asphalt, the high-carbonization of the starch-temperature starch-softening of the asphalt, and the high-carbonization of the asphalt, the high-carbonization of the asphalt, the asphalt is not required high-carbonization of the high-temperature asphalt, and the high-carbonization of the high-temperature of the asphalt, the high-carbonization of the asphalt, and the asphalt, the asphalt is not required high-carbonization of the asphalt, and the high-carbonization of the high-gelatinization and the high-carbonization of the asphalt, and the high-carbonization of the asphalt, and the asphalt, the high-carbonization of the asphalt, the high-gelatinization of the asphalt, and the high-gelatinization of the high-carbonization of the asphalt, and the high-carbonization of the asphalt, and the asphalt.
Disclosure of Invention
The invention provides a method for preparing formed coke by cold press molding of a formed coke binder, which has the advantages of simple process flow, low production cost, high molding rate and high cold and hot strength and can meet the requirements of a metallurgical submerged arc furnace.
The method for preparing the high-strength formed coke by cold press molding is adopted to solve the problems, the binder is added into coke powder and uniformly mixed, water or a non-aqueous solvent is added, and the formed coke is obtained by normal-temperature briquetting molding and drying, and comprises the following specific steps:
(1) putting raw coke powder into a raw material bin, conveying the coke powder in the raw material bin into a hammer crusher through a belt, and crushing the coke powder by using the crusher until the particle size is less than 3 mm;
(2) mixing binder components, adding the binder components into a stirrer, and uniformly stirring, wherein the binder components comprise the following mass ratio: 0-20 parts of normal temperature binder, 60-80 parts of asphalt, 0-5 parts of asphalt modifier, 0-10 parts of formed coke strength stabilizer and 0-2 parts of starch pasting modifier;
(3) meanwhile, the mixed binder is conveyed into a crusher through a screw feeder, the coke powder and the binder components are mixed in the crusher, the ratio of the coke powder to the binder components is controlled and adjusted through the rotating speed of the screw feeder so as to realize non-intermittent continuous ball pressing, and the total ratio of the binder is 8.6-10.7% of the mass of the coke powder;
(4) conveying the mixture of the two materials into a horizontal mixer through a belt, adding water or a non-aqueous solvent into the mixer, and uniformly mixing the coke powder and the binder to obtain a final material, wherein the material temperature at the outlet of the mixer is 70-90 ℃, the moisture content of the final material is 8-15%, the non-aqueous solvent is 0-20 parts, and the adding amount of the moisture is not more than 15%;
(5) pressing the final material into blocks to obtain wet blocks;
(6) and transferring the formed final material, namely the wet block, to a drying bin for drying.
Furthermore, in the coke powder, the ratio of the particle size of 0.9-3mm is 40%, the ratio of 0.2-0.9mm is 30%, and the ratio of below 0.2mm is 30%.
Further, the normal-temperature binder is corn starch, the asphalt modifier is artificial graphite or boron compounds, the formed coke strength stabilizer is cement or magnesium oxide, the starch gelatinization modifier is sodium hydroxide, and the non-aqueous solvent is ethyl acetate. In general, when corn starch is added without ethyl acetate, the higher the moisture and temperature, the more uniform the mixing, the higher the degree of gelatinization of the corn starch, the higher the pelletization rate, the higher the cold and hot strength, the insufficient moisture addition, the large internal friction, the uneven mixing, the lower the yield and the cold and hot strength, but the too much moisture addition, exceeding 15%, both the pelletization rate and the final cold and hot strength decrease. If the corn starch is not added, ethyl acetate is added, water is directly added instead of introducing water vapor, and the water vapor has the function of gelatinizing the corn starch.
Further, the coke powder is metallurgical coke powder or petroleum coke powder, the granularity of corn starch, asphalt, artificial graphite, magnesium oxide and sodium hydroxide is below 0.15mm, the asphalt is high-temperature asphalt or medium-temperature coal asphalt, preferably non-national standard high-temperature coal asphalt, the total amount of water added is 8-15% of the mass of the metallurgical coke or petroleum coke, an atomizing nozzle is opened, water vapor heated by heat-conducting oil enters a horizontal mixer through the nozzle to heat the mixture, if the water vapor is not added enough, a water pipe can be opened to supplement water, the temperature in the mixer is 70-90 ℃, and the briquetting pressure is 30-35 MPa.
Furthermore, the coke powder is metallurgical coke powder or petroleum coke powder, the corn starch is 0-20 parts, the high-temperature asphalt is 60-80 parts, the artificial graphite or boron compound is 4-5 parts, the cement or magnesium oxide is 0-10 parts, the sodium hydroxide is 0-2 parts, and the total amount of the binder is 8.6-10.7% of the mass of the metallurgical coke or petroleum coke.
Furthermore, the coke powder is metallurgical coke powder or petroleum coke powder, the ethyl acetate is 0-20 parts, the high-temperature asphalt is 60-80 parts, the artificial graphite or boron compound is 0-5 parts, the total amount of the binder is 10% -10.5% of the mass of the metallurgical coke or petroleum coke, and the total amount of the water is 8-9% of the mass of the metallurgical coke.
Further, if the volatile content of the petroleum coke is too high, the petroleum coke can be dried for 2 hours at the temperature of 250 ℃ and 300 ℃ and then added with a binder and a water pressure block for molding.
Further, in the step (5), the briquetting method is to convey the uniformly mixed material to a pair-roller extrusion granulator through a belt for pelletizing, wherein the wet block is a wet ball, and the shape of the wet ball is an ellipse.
The wet bulb had a size of 40mmx60mm and a thickness of 20 mm.
In the step (6), the wet balls are conveyed into a drying bin through a belt to be dried, wherein the temperature is 130 ℃, and the time is 6 hours.
Further, the boron compound is one or a combination of any two of boron oxide, pyridine borane, boron carbide, borax and boric acid.
The cement is magnesia cement or aluminate refractory cement, and the magnesia is light magnesia.
The invention has the advantages that:
1. the corn starch and the sodium hydroxide are added and heated to 70-90 ℃ for gelatinization, so that cold press molding can be realized, and the cold strength is high.
2. The non-national standard high-temperature asphalt is added instead of the medium-temperature asphalt, so that the price is very low on one hand, and the high-temperature carbonization coking value of more than 50 percent can be obtained on the other hand, the high-temperature strength is improved, and the volatile component content is greatly reduced.
3. Adding the modifier of artificial graphite or boron compounds, increasing the softening temperature of the asphalt, improving the cohesiveness of the asphalt, reducing the generation of an asphalt intermediate phase, enhancing the oxidation resistance of the asphalt, adjusting the microstructure of the carbonized asphalt, increasing the coking value of the carbonized asphalt and finally increasing the high-temperature strength of the formed coke.
4. The addition of the stabilizer cement or magnesium oxide can compensate the formed coke strength of the corn starch losing cohesiveness after carbonization at the temperature of more than 200 ℃, compensate the strength reduction caused by the viscosity rapidly reduced after the asphalt softening point temperature, improve the formed coke strength reduced by cohesiveness due to the occurrence of polycondensation reaction before carbonization, improve the defect of unstable high-temperature performance of the organic binder, and adjust the fluctuation of the heat strength of the formed coke in the temperature rise process of the submerged arc furnace.
5. The solvent ethyl acetate is added to dissolve β resin of the asphalt, the bonding property of the asphalt is activated at normal temperature, the formed coke is prepared by cold press molding, various defects of hot press molding are avoided, and the ethyl acetate is non-toxic and volatile, and has the characteristics of safety, non-toxicity and easy processing.
6. The raw material petroleum coke powder is dried for 2 hours at the temperature of 250-300 ℃ in advance and then pressed into balls, so that all water and most volatile components in the raw material can be removed, and the formed coke is prevented from being cracked due to too high internal vapor pressure of the volatile components when being roasted at the temperature of more than 500 ℃.
Drawings
FIG. 1 is a process flow diagram for preparing high-strength formed coke by cold press molding.
Detailed Description
Example 1:
the method for preparing the high-strength formed coke by cold press molding is characterized by comprising the following specific steps of:
(1) crushing the coke powder to a particle size of less than 3mm by using a crusher;
(2) mixing binder components, stirring and uniformly mixing, wherein the binder components comprise the following mass ratio: 0-20 parts of normal temperature binder, 60-80 parts of asphalt, 0-5 parts of asphalt modifier, 0-10 parts of formed coke strength stabilizer and 0-2 parts of starch pasting modifier;
(3) in a crusher, mixing the coke powder with the binder component, and adjusting the ratio of the coke powder to the binder component, wherein the total ratio of the binder is 8.6-10.7% of the mass of the coke powder;
(4) mixing coke powder and binder components uniformly in a mixer, adding water and steam to obtain a final material, wherein the material temperature requirement of an outlet of the mixer is 70-90 ℃, the moisture content of the final material is 8% -15%, and the moisture addition amount is not more than 15%;
(5) pressing the final material into blocks;
(6) and (5) transferring the molded final material to a drying bin for drying.
In the coke powder, the ratio of the particle size of 0.9-3mm is 40%, the ratio of 0.2-0.9mm is 30%, and the ratio of below 0.2mm is 30%.
The normal temperature binder is corn starch, the asphalt modifier is artificial graphite or boron compound, the formed coke strength stabilizer is cement or magnesium oxide, and the starch gelatinization modifier is sodium hydroxide.
The method specifically comprises the following steps: the raw materials comprise metallurgical coke powder, 20 parts of corn starch, 60 parts of high-temperature asphalt, 4 parts of artificial graphite, 10 parts of cement and 2 parts of sodium hydroxide, wherein the particle sizes of the corn starch, the asphalt, the artificial graphite and the sodium hydroxide are less than 0.15mm, the total amount of a binder is 9.6 percent of the mass of the metallurgical coke, the total amount of water is 13 percent of the mass of the metallurgical coke, the temperature in a horizontal mixer is 70 ℃, the particle size of the metallurgical coke is less than 3mm, and the molding pressure is 30-35 MPa. The drying temperature was 130 ℃. The falling strength of the formed coke is 10 times (1 m)-1The cold strength is 1350N, and the compression strength at high temperature of 900 ℃ is 1340N. Formed coke ash content 14.85%, volatile matter 4.96%, fixed carbon 79.12%, and the balance water.
Example 2: the raw materials are metallurgical coke powder, 20 parts of corn starch, 60 parts of high-temperature asphalt, 4 parts of artificial graphite and 2 parts of sodium hydroxide, the total amount of the binder accounts for 8.6 percent of the mass of the metallurgical coke, and the rest is the same as that of the example 1. The falling strength of the formed coke is 7 times (1 m)-1The cold strength is 1230N, and the high-temperature compressive strength at 900 ℃ is 1280N. Formed coke ash content 14.13%, volatile component 5.15%, fixed carbon 78.53%, and the balance water.
Example 3: the raw materials are metallurgical coke powder, 20 parts of corn starch, 60 parts of high-temperature asphalt, 10 parts of magnesium oxide and 2 parts of sodium hydroxide, the total amount of the binder accounts for 9.2 percent of the mass of the metallurgical coke, and the rest is the same as that of the example 1. The falling strength of the formed coke is 8 times (1 m)-1The cold strength is 1280N, and the high-temperature compressive strength at 900 ℃ is 1210N. 14.54 percent of formed coke ash, 5.93 percent of volatile matter, 78.26 percent of fixed carbon and the balance of water.
Example 4: the raw materials are metallurgical coke powder, 20 parts of corn starch, 60 parts of high-temperature asphalt, 4 parts of boron oxide, 10 parts of cement and 2 parts of sodium hydroxide, the total amount of the binder is 9.6 percent of the mass of the metallurgical coke, and the other steps are the same as the embodiment1. The falling strength of the formed coke is 7 times (1 m)-1The cold strength is 1320N, and the compression strength at high temperature of 900 ℃ is 1310N. Formed coke ash content 14.93%, volatile component 5.21%, fixed carbon 78.98%, and the balance water.
Example 5: the raw materials are metallurgical coke powder, 20 parts of corn starch, 80 parts of high-temperature asphalt, 5 parts of artificial graphite and 2 parts of sodium hydroxide, the total amount of the binder accounts for 10.7 percent of the mass of the metallurgical coke, and the rest is the same as that of the example 1. The falling strength of the formed coke is 12 times (1 m)-1The cold strength is 1460N, and the high-temperature compression strength at 900 ℃ is 1450N. 14.03 percent of formed coke ash, 5.28 percent of volatile component, 80.03 percent of fixed carbon and the balance of water.
Example 6: the raw materials are metallurgical coke powder, 20 parts of ethyl acetate and 80 parts of high-temperature asphalt, the total amount of the binder accounts for 10 percent of the mass of the metallurgical coke, the total amount of the water added accounts for 9 percent of the mass of the metallurgical coke, water vapor is not introduced into a horizontal mixer, the drying temperature is divided into 2 sections, the ethyl acetate is removed by drying at 50 ℃ for 3 hours, and then the ethyl acetate is dried at 130 ℃ for 6 hours, and the method is otherwise the same as the example 1. The falling strength of the formed coke is 14 times (1 m)-1The cold strength is 1870N and the compression strength at 900 ℃ is 1860N. 13.46% of formed coke ash, 5.04% of volatile matter, 80.72% of fixed carbon and the balance of water.
Example 7: the raw materials are metallurgical coke powder, 20 parts of ethyl acetate, 80 parts of high-temperature asphalt and 5 parts of artificial graphite, the total amount of the binder accounts for 10.5 percent of the mass of the metallurgical coke, and the rest is the same as that of the example 6. The falling strength of the formed coke is 15 times (1 m)-1The cold strength was 1990N and the compression strength at 900 ℃ was 1980N. 13.74 percent of formed coke ash, 4.87 percent of volatile component, 80.96 percent of fixed carbon and the balance of water.
Example 8: the raw materials are metallurgical coke powder, 20 parts of ethyl acetate, 80 parts of high-temperature asphalt and 5 parts of boron oxide, the total amount of the binder accounts for 10.5 percent of the mass of the metallurgical coke, and the rest is the same as that of the example 6. The falling strength of the formed coke is 13 times (1 m)-1The cold strength is 1950N, and the high-temperature compression strength at 900 ℃ is 1960N. 13.76% of formed coke ash, 4.96% of volatile components, 80.83% of fixed carbon and the balance of water.
Example 9: the raw materials comprise petroleum coke powder, 20 parts of corn starch, 60 parts of high-temperature asphalt, 4 parts of artificial graphite, 10 parts of cement and 2 parts of sodium hydroxide, and the total amount of the binder is 9 parts of the mass of the petroleum coke.6 percent and the total amount of water added is 8 percent of the mass of the petroleum coke, and the rest is the same as the example 6. If the formed coke is cracked due to too high internal vapor pressure of volatile components when being roasted at the temperature of more than 500 ℃, the raw material petroleum coke powder can be dried for 2 hours at the temperature of 250 ℃ and 300 ℃ and then pressed into balls, because all water and most of volatile components in the raw material can be removed. The falling strength of the formed coke is 7 times (1 m)-1The cold strength is 1180N, and the compression strength at the high temperature of 900 ℃ is 1430N. Formed coke ash 2.46%, volatile matter 12.34%, fixed carbon 84.18%, and water in balance.
Example 10: the raw materials are petroleum coke powder, 20 parts of ethyl acetate, 80 parts of high-temperature asphalt and 5 parts of artificial graphite, the total amount of the binder is 10.5 percent of the mass of the petroleum coke, the total amount of the water is 8 percent of the mass of the petroleum coke, and the rest is the same as that of the example 6. The falling strength of the formed coke is 13 times (1 m)-1The cold strength is 1830N, and the high-temperature compressive strength at 900 ℃ is 2050N. Formed coke ash content 1.43%, volatile matter 13.05%, fixed carbon 84.32%, and the balance water.
In this example, the strength index of the sample obtained is shown in Table 1.
TABLE 1 Strength index of formed coke
| Name (R) | Drop Strength/time (1 m)-1 | Cold strength/N | Thermal strength/N | Ash content% | Volatile fraction/%) | Fixed carbon/%) |
| Metallurgical coke powder | 12.87 | 2.4 | 82.27 | |||
| Example 1 | 10 | 1350 | 1340 | 14.85 | 4.96% | 79.12 |
| Example 2 | 7 | 1230 | 1280 | 14.13 | 5.15 | 78.53 |
| Example 3 | 8 | 1280 | 1210 | 14.54 | 5.93 | 78.26 |
| Example 4 | 7 | 1320 | 1310 | 14.93 | 5.21 | 78.98 |
| Example 5 | 12 | 1460 | 1450 | 14.03 | 5.28 | 80.03 |
| Example 6 | 14 | 1870 | 1860 | 13.46 | 5.04 | 80.72 |
| Example 7 | 15 | 1990 | 1980 | 13.74 | 4.87 | 80.96 |
| Example 8 | 13 | 1950 | 1960 | 13.76 | 4.96 | 80.83 |
| Petroleum coke powder | 0.3 | 9.69 | 88.52 | |||
| Example 9 | 7 | 1180 | 1430 | 2.46 | 12.34 | 84.18 |
| Example 10 | 13 | 1830 | 2050 | 1.43 | 13.05 | 84.32% |
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several equivalent substitutions or obvious modifications can be made without departing from the spirit of the invention, and all the properties or uses are considered to be within the scope of the invention.
Claims (10)
1. The method for preparing the high-strength formed coke by cold press molding is characterized by comprising the following specific steps of:
(1) crushing the coke powder to a particle size of less than 3mm by using a crusher;
(2) mixing binder components, and uniformly stirring, wherein the binder components comprise the following mass ratio: 0-20 parts of normal temperature binder, 60-80 parts of asphalt, 0-5 parts of asphalt modifier, 0-10 parts of formed coke strength stabilizer and 0-2 parts of starch pasting modifier;
(3) primarily mixing the coke powder and the binder component in a crusher, and adjusting the ratio of the coke powder to the binder component, wherein the total ratio of the binder is 8.6-10.7% of the mass of the coke powder;
(4) adding water or a non-aqueous solvent into a mixer, and uniformly mixing the coke powder and the binder to obtain a final material, wherein the material temperature at the outlet of the mixer is required to be 70-90 ℃, the water content of the final material is 8% -15%, and the non-aqueous solvent is 0-20 parts, wherein the water addition amount is not more than 15%;
(5) pressing the final material into a block;
(6) and (5) transferring the molded final material to a drying bin for drying.
2. The method for preparing high-strength formed coke by cold press molding according to claim 1, wherein the coke powder has a particle size of 0.9-3mm of 40%, a particle size of 0.2-0.9mm of 30% and a particle size of less than 0.2mm of 30%.
3. The method for preparing high-strength formed coke by cold press molding according to claim 2, wherein the normal temperature binder is corn starch, the asphalt modifier is artificial graphite or boron compound, the formed coke strength stabilizer is cement or magnesium oxide, the starch gelatinization modifier is sodium hydroxide, and the non-aqueous solvent is ethyl acetate.
4. The method for preparing high-strength formed coke by cold press molding according to claim 3, wherein the coke powder is metallurgical coke powder or petroleum coke powder, the particle size of the corn starch, the asphalt, the artificial graphite, the magnesium oxide and the sodium hydroxide is less than 0.15mm, the asphalt is high-temperature asphalt or medium-temperature coal asphalt, the total amount of water added is 8-15% of the mass of the coke powder, water vapor is introduced into a mixer for heating, the temperature in the mixer is 70-90 ℃, the briquetting pressure is 30-35MPa, and the drying temperature is 130 ℃.
5. The method for preparing high-strength formed coke by cold press molding according to claim 4, wherein the coke powder is metallurgical coke powder or petroleum coke powder, the corn starch is 0-20 parts, the high-temperature asphalt is 60-80 parts, the artificial graphite or boron compound is 4-5 parts, the cement or magnesium oxide is 0-10 parts, the sodium hydroxide is 0-2 parts, and the total amount of the binder is 8.6-10.7% of the mass of the metallurgical coke.
6. The method for preparing high-strength formed coke by cold press molding according to claim 3, wherein the coke powder is metallurgical coke powder or petroleum coke powder, the ethyl acetate is 0-20 parts, the high-temperature asphalt is 60-80 parts, the artificial graphite or boron compound is 4-5 parts, and the total amount of the binder is 10% -10.5% of the mass of the metallurgical coke or petroleum coke.
7. The method for preparing high-strength formed coke by cold press molding according to claim 6, wherein the coke powder is metallurgical coke powder or petroleum coke powder, the particle size of the asphalt, the artificial graphite and the boron compound is less than 0.15mm, the asphalt is high-temperature asphalt or medium-temperature coal asphalt, the total amount of water added is 8% -9% of the mass of the metallurgical coke or petroleum coke, water is introduced into the mixer instead of water vapor, the drying temperature is divided into 2 sections, the drying is carried out at 50 ℃ for 3 hours to remove ethyl acetate, and the drying is carried out at 130 ℃ for 6 hours.
8. The method for preparing high-strength formed coke by cold press molding as claimed in claim 7, wherein the petroleum coke powder is pre-dried at 250-300 ℃ for 2 hours, and then added with the binder and the hydraulic block for molding.
9. The method for preparing high-strength formed coke by cold press molding according to any one of claims 3 to 8, wherein the boron compound is one or a combination of any two of boron oxide, pyridine borane, boron carbide, borax and boric acid.
10. The method for preparing high-strength formed coke by cold press molding according to claim 9, wherein in the step (5), the final material is briquetted to obtain oval wet balls.
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| CN113136107A (en) * | 2021-03-25 | 2021-07-20 | 鞍山科顺建筑材料有限公司 | Petroleum coke high polymer modified asphalt waterproof coiled material and preparation method thereof |
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| CN102191102A (en) * | 2010-03-16 | 2011-09-21 | 曲靖市雨明科技有限责任公司 | Bonding agent formula of carburized type cold-hot pressure dual-purpose formed coke |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113136107A (en) * | 2021-03-25 | 2021-07-20 | 鞍山科顺建筑材料有限公司 | Petroleum coke high polymer modified asphalt waterproof coiled material and preparation method thereof |
| CN113136107B (en) * | 2021-03-25 | 2022-08-02 | 鞍山科顺建筑材料有限公司 | Petroleum coke high polymer modified asphalt waterproof coiled material and preparation method thereof |
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| CN111154278B (en) | 2022-01-25 |
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