Disclosure of Invention
In order to solve the problems, the invention provides a preparation method of small-particle-size machine-made semi-coke barbecue carbon.
A preparation method of small-particle-size machine-made semi-coke barbecue carbon comprises the following steps:
step one, crushing, namely putting machine-made semi-coke with small particle size into a crusher, and crushing to obtain raw semi-coke with small particle size, wherein the mass ratio of medium particle size to large particle size is 1:0.5-1.2: 0.4-4;
step two, mixing materials, namely adding 80-100 parts of raw material semi coke obtained by crushing into a mixer, then adding 5-9 parts of cellulose salt, mixing and stirring for 10-30min, then adding 1.5-4.5 parts of adhesive, 0.8-2.6 parts of combustion improver and 3.5-7.2 parts of sulfur fixing agent, and continuously stirring and mixing for 10-30min to obtain a mixture; the sulfur-fixing agent is a catalytic composite sulfur-fixing agent, and is prepared by the following method:
according to the mass portion, 15-30 portions of polymethylhydrosiloxane, 0.5-1.8 portions of isopropanol solution of chloroplatinic acid with the mass percentage concentration of 3-7 percent and 10-17 portions of N, N-diallylethanolamine are introduced into nitrogen, and are stirred and mixed for 130-materials for 160min under the condition of heat preservation, then 1-5 portions of copper acrylate, 0.05-0.2 portion of benzoyl peroxide and 0.1-0.5 portion of metal oxide are added, the temperature is controlled to be 40-80 ℃, the stirring reaction is carried out for 10-20h, and the catalytic composite sulfur fixing agent can be obtained after the reaction is finished and is cooled to the room temperature;
thirdly, performing smoldering gelatinization, namely adding the mixture into a smoldering tank, replacing air in the tank with nitrogen, and then introducing water vapor with the temperature of 100-120 ℃ for 90-120s, wherein the pressure in the smoldering tank is 0.2-0.7MPa, so as to obtain a gelatinized material;
and step four, molding and drying, namely conveying the gelatinized material into a molding machine, performing compression molding under the pressure of 6-9MPa, and then drying in an oven at the temperature of 125-180 ℃ to obtain the small-particle-size machine-made semi-coke barbecue carbon.
The grain size of the small-grain diameter semi-coke is less than 0.5mm, the grain size of the medium-grain diameter semi-coke is 0.5-1mm, and the grain size of the large-grain diameter semi-coke is 1-5 mm.
The adhesive is potato starch or wheat starch or sweet potato starch.
The combustion improver is potassium permanganate, potassium chlorate or potassium nitrate.
The cellulose salt is sodium lignosulfonate or calcium lignosulfonate.
The catalyst is formed by mixing potassium chlorate and ethylene glycol monomethyl ether according to the mass ratio of 1: 0.2-0.8.
The metal oxide is ferric oxide or magnesium oxide or zinc oxide.
The reaction mechanism of the catalytic composite sulfur fixing agent is as follows: the formula of the partial reaction mechanism of the hydrosilylation reaction of the polymethylhydrosiloxane and the N, N-diallyl ethanolamine is shown as follows:
then carrying out polymerization reaction with copper acrylate, wherein the equation of part of the reaction mechanism is shown as follows:
the invention discloses a preparation method of small-particle-size machine-made semi-coke barbecue carbon, which is characterized in that the barbecue carbon obtained by mixing cellulose salt, plant starch and semi-coke, gelatinizing the mixture by water vapor under high pressure and then performing compression molding has high strength; the invention also adds a catalytic composite sulfur fixing agent into the formula, and the polymethylhydrosiloxane and the N, N-diallyl ethanolamine generate hydrosilylation reaction and then generate polymerization reaction with the copper acrylate to prepare the catalyst.
Detailed Description
The invention is further illustrated by the following specific examples:
example 1
A preparation method of small-particle-size machine-made semi-coke barbecue carbon comprises the following steps:
step one, crushing, namely putting machine-made semi-coke with small particle size into a crusher, and crushing to obtain raw semi-coke with small particle size, wherein the mass ratio of medium particle size to large particle size is 1:0.5: 0.4;
step two, mixing materials, namely adding 80kg of raw material semi coke obtained by crushing into a mixer, then adding 5kg of cellulose salt, mixing and stirring for 10min, then adding 1.5kg of adhesive, 0.8kg of combustion improver and 3.5kg of sulfur fixing agent, and continuously stirring and mixing for 10min to obtain a mixture; the sulfur-fixing agent is a catalytic composite sulfur-fixing agent, and is prepared by the following method:
adding 15kg of polymethylhydrosiloxane, 0.5kg of isopropanol solution of chloroplatinic acid with the mass percentage concentration of 3% and 10kg of N, N-diallylethanolamine, introducing nitrogen, keeping the temperature, stirring and mixing for 130min, then adding 1kg of copper acrylate, 0.05kg of benzoyl peroxide and 0.1kg of metal oxide, controlling the temperature to be 40 ℃, stirring and reacting for 10h, and cooling to room temperature after the reaction is finished to obtain the catalytic composite sulfur fixing agent;
thirdly, performing smoldering gelatinization, namely adding the mixture into a smoldering tank, replacing air in the tank with nitrogen, and then introducing water vapor with the temperature of 100 ℃ for 90s, wherein the pressure in the smoldering tank is 0.2MPa, so as to obtain a pasty material;
and step four, molding and drying, namely conveying the gelatinized material into a molding machine, performing compression molding under the pressure of 6MPa, and then drying in a drying oven at 125 ℃ to obtain the small-particle-size machine-made semi-coke barbecue carbon.
The grain size of the small-grain diameter semi-coke is less than 0.5mm, the grain size of the medium-grain diameter semi-coke is 0.5-1mm, and the grain size of the large-grain diameter semi-coke is 1-5 mm.
The adhesive is potato starch.
The combustion improver is potassium permanganate.
The cellulose salt is sodium lignosulphonate.
The catalyst is prepared by mixing potassium chlorate and ethylene glycol monomethyl ether according to the mass ratio of 1: 0.2.
The metal oxide is ferric oxide.
Example 2
A preparation method of small-particle-size machine-made semi-coke barbecue carbon comprises the following steps:
step one, crushing, namely putting machine-made semi-coke with small particle size into a crusher, and crushing to obtain raw semi-coke with small particle size, wherein the mass ratio of medium particle size to large particle size is 1:0.8: 2.4;
step two, mixing materials, namely adding 90kg of raw material semi coke obtained by crushing into a mixer, then adding 8kg of cellulose salt, mixing and stirring for 20min, then adding 3.5kg of adhesive, 1.6kg of combustion improver and 5.2kg of sulfur fixing agent, and continuously stirring and mixing for 20min to obtain a mixture; the sulfur-fixing agent is a catalytic composite sulfur-fixing agent, and is prepared by the following method:
adding 23kg of polymethylhydrosiloxane, 1.2kg of 5% isopropanol solution of chloroplatinic acid and 24kg of N, N-diallylethanolamine, introducing nitrogen, keeping the temperature, stirring and mixing for 145min, then adding 3kg of copper acrylate, 0.13kg of benzoyl peroxide and 0.3kg of metal oxide, controlling the temperature to be 60 ℃, stirring and reacting for 15h, and cooling to room temperature after the reaction is finished to obtain the catalytic composite sulfur fixing agent;
thirdly, performing smoldering gelatinization, namely adding the mixture into a smoldering tank, replacing air in the tank with nitrogen, and then introducing water vapor with the temperature of 110 ℃ for 100s, wherein the pressure in the smoldering tank is 0.5MPa, so as to obtain a pasty material;
and step four, molding and drying, namely conveying the gelatinized material into a molding machine, performing compression molding under the pressure of 8MPa, and then drying in a drying oven at 150 ℃ to obtain the small-particle-size machine-made semi-coke barbecue carbon.
The grain size of the small-grain diameter semi-coke is less than 0.5mm, the grain size of the medium-grain diameter semi-coke is 0.5-1mm, and the grain size of the large-grain diameter semi-coke is 1-5 mm.
The adhesive is wheat starch.
The combustion improver is potassium chlorate.
The cellulose salt is calcium lignosulphonate.
The catalyst is prepared by mixing potassium chlorate and ethylene glycol monomethyl ether according to the mass ratio of 1: 0.5.
The metal oxide is magnesium oxide.
Example 3
A preparation method of small-particle-size machine-made semi-coke barbecue carbon comprises the following steps:
step one, crushing, namely putting machine-made semi-coke with small particle size into a crusher, and crushing to obtain raw semi-coke with small particle size, wherein the mass ratio of medium particle size to large particle size is 1:1.2: 4;
step two, mixing materials, namely adding 100kg of raw material semi coke obtained by crushing into a mixer, then adding 9kg of cellulose salt, mixing and stirring for 30min, then adding 4.5kg of adhesive, 2.6kg of combustion improver and 7.2kg of sulfur fixing agent, and continuously stirring and mixing for 30min to obtain a mixture; the sulfur-fixing agent is a catalytic composite sulfur-fixing agent, and is prepared by the following method:
30kg of polymethylhydrosiloxane, 1.8kg of isopropanol solution of chloroplatinic acid with the mass percent concentration of 7% and 17kg of N, N-diallylethanolamine are introduced with nitrogen, stirred and mixed for 160min under the condition of heat preservation, then 5kg of copper acrylate, 0.2kg of benzoyl peroxide and 0.5kg of metal oxide are added, the temperature is controlled to be 80 ℃, the mixture is stirred and reacted for 20h, and after the reaction is finished, the mixture is cooled to room temperature to obtain the catalytic composite sulfur fixing agent;
thirdly, performing smoldering gelatinization, namely adding the mixture into a smoldering tank, replacing air in the tank with nitrogen, and then introducing water vapor with the temperature of 120 ℃ for 120s, wherein the pressure in the smoldering tank is 0.7MPa, so as to obtain a pasty material;
and step four, molding and drying, namely conveying the gelatinized material into a molding machine, performing compression molding under the pressure of 9MPa, and then drying in an oven at 180 ℃ to obtain the small-particle-size machine-made semi-coke barbecue carbon.
The grain size of the small-grain diameter semi-coke is less than 0.5mm, the grain size of the medium-grain diameter semi-coke is 0.5-1mm, and the grain size of the large-grain diameter semi-coke is 1-5 mm.
The adhesive is sweet potato starch.
The combustion improver is potassium nitrate.
The cellulose salt is calcium lignosulphonate.
The catalyst is prepared by mixing potassium chlorate and ethylene glycol monomethyl ether according to the mass ratio of 1: 0.8.
The metal oxide is zinc oxide.
The cold pressing strength of the finished carbon prepared by the invention in the embodiment is measured according to an industrial briquette cold pressing strength measuring method (MT/T748-2007), 10 prepared finished carbons are taken and placed in the center of a force application surface of a compression strength instrument, and the numerical value of the finished carbon in spalling is recorded. Taking the arithmetic mean value of the cold pressing strength measured by 10 briquette balls as the cold pressing strength of a sample, and expressing the cold pressing strength by SCC with the unit of N/briquette; the sulfur content of the finished carbon is measured according to the national standard method GB/T214-2007. The test results are shown in the following table:
|
sulfur content (%)
|
Cold pressing strength (N/piece)
|
Example 1
|
0.14
|
769.2
|
Example 2
|
0.12
|
781.6
|
Example 3
|
0.09
|
788.2 |
Comparative example 1
A preparation method of small-particle-size machine-made semi-coke barbecue carbon comprises the following steps:
step one, crushing, namely putting machine-made semi-coke with small particle size into a crusher, and crushing to obtain raw semi-coke with small particle size, wherein the mass ratio of medium particle size to large particle size is 1:0.5: 0.4;
step two, mixing materials, namely adding 80kg of raw material semi coke obtained by crushing into a mixer, then adding 5kg of cellulose salt, mixing and stirring for 10min, then adding 1.5kg of adhesive, 0.8kg of combustion improver and 3.5kg of sulfur fixing agent, and continuously stirring and mixing for 10min to obtain a mixture; the sulfur-fixing agent is calcium carbonate;
thirdly, performing smoldering gelatinization, namely adding the mixture into a smoldering tank, replacing air in the tank with nitrogen, and then introducing water vapor with the temperature of 100 ℃ for 90s, wherein the pressure in the smoldering tank is 0.2MPa, so as to obtain a pasty material;
and step four, molding and drying, namely conveying the gelatinized material into a molding machine, performing compression molding under the pressure of 6MPa, and then drying in a drying oven at 125 ℃ to obtain the small-particle-size machine-made semi-coke barbecue carbon.
The grain size of the small-grain diameter semi-coke is less than 0.5mm, the grain size of the medium-grain diameter semi-coke is 0.5-1mm, and the grain size of the large-grain diameter semi-coke is 1-5 mm.
The adhesive is potato starch.
The combustion improver is potassium permanganate.
The cellulose salt is sodium lignosulphonate.
Comparative example 2
A preparation method of small-particle-size machine-made semi-coke barbecue carbon comprises the following steps:
step one, crushing, namely putting machine-made semi-coke with small particle size into a crusher, and crushing to obtain raw semi-coke with small particle size, wherein the mass ratio of medium particle size to large particle size is 1:0.5: 0.4;
step two, mixing materials, namely adding 80kg of raw material semi coke obtained by crushing into a mixer, then adding 5kg of cellulose salt, mixing and stirring for 10min, then adding 1.5kg of adhesive, 0.8kg of combustion improver and 3.5kg of sulfur fixing agent, and continuously stirring and mixing for 10min to obtain a mixture; the sulfur-fixing agent is a catalytic composite sulfur-fixing agent, and is prepared by the following method:
15kg of polymethylhydrosiloxane, 0.5kg of isopropanol solution of chloroplatinic acid with the mass percentage concentration of 3% and 10kg of N, N-diallylethanolamine are introduced with nitrogen, stirred and mixed for 130min under heat preservation, and then cooled to room temperature to obtain the catalytic composite sulfur fixing agent;
thirdly, performing smoldering gelatinization, namely adding the mixture into a smoldering tank, replacing air in the tank with nitrogen, and then introducing water vapor with the temperature of 100 ℃ for 90s, wherein the pressure in the smoldering tank is 0.2MPa, so as to obtain a pasty material;
and step four, molding and drying, namely conveying the gelatinized material into a molding machine, performing compression molding under the pressure of 6MPa, and then drying in a drying oven at 125 ℃ to obtain the small-particle-size machine-made semi-coke barbecue carbon.
The grain size of the small-grain diameter semi-coke is less than 0.5mm, the grain size of the medium-grain diameter semi-coke is 0.5-1mm, and the grain size of the large-grain diameter semi-coke is 1-5 mm.
The adhesive is potato starch.
The combustion improver is potassium permanganate.
The cellulose salt is sodium lignosulphonate.
The catalyst is prepared by mixing potassium chlorate and ethylene glycol monomethyl ether according to the mass ratio of 1: 0.2.
The metal oxide is ferric oxide.
Comparative example 3
A preparation method of small-particle-size machine-made semi-coke barbecue carbon comprises the following steps:
step one, crushing, namely putting machine-made semi-coke with small particle size into a crusher, and crushing to obtain raw semi-coke with small particle size, wherein the mass ratio of medium particle size to large particle size is 1:0.5: 0.4;
step two, mixing materials, namely adding 80kg of raw material semi coke obtained by crushing into a mixer, then adding 1.5kg of adhesive, 0.8kg of combustion improver and 3.5kg of sulfur fixing agent, and continuously stirring and mixing for 10min to obtain a mixture; the sulfur-fixing agent is a catalytic composite sulfur-fixing agent, and is prepared by the following method:
introducing nitrogen into 15kg of polymethylhydrosiloxane and 0.5kg of isopropanol solution of chloroplatinic acid with the mass percent concentration of 3%, keeping the temperature, stirring and mixing for 130min, then adding 1kg of copper acrylate, 0.05kg of benzoyl peroxide and 0.1kg of metal oxide, controlling the temperature at 40 ℃, stirring and reacting for 10h, and cooling to room temperature after the reaction is finished to obtain the catalytic composite sulfur fixing agent;
thirdly, performing smoldering gelatinization, namely adding the mixture into a smoldering tank, replacing air in the tank with nitrogen, and then introducing water vapor with the temperature of 100 ℃ for 90s, wherein the pressure in the smoldering tank is 0.2MPa, so as to obtain a pasty material;
and step four, molding and drying, namely conveying the gelatinized material into a molding machine, performing compression molding under the pressure of 6MPa, and then drying in a drying oven at 125 ℃ to obtain the small-particle-size machine-made semi-coke barbecue carbon.
The grain size of the small-grain diameter semi-coke is less than 0.5mm, the grain size of the medium-grain diameter semi-coke is 0.5-1mm, and the grain size of the large-grain diameter semi-coke is 1-5 mm.
The adhesive is potato starch.
The combustion improver is potassium permanganate.
The catalyst is prepared by mixing potassium chlorate and ethylene glycol monomethyl ether according to the mass ratio of 1: 0.2.
The metal oxide is ferric oxide.
The cold pressing strength and sulfur content of the finished carbon prepared according to the present invention of the above comparative example were measured according to the methods of the examples. The test results are shown in the following table:
|
sulfur content (%)
|
Cold pressing strength (N/piece)
|
Comparative example 1
|
0.49
|
738.4
|
Comparative example 2
|
0.33
|
762.3
|
Comparative example 3
|
0.27
|
675.8 |
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present invention in the specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.