CN111909746A - Preparation and application method of water-soluble adhesive powder for cold-pressed coke - Google Patents
Preparation and application method of water-soluble adhesive powder for cold-pressed coke Download PDFInfo
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
- C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
- C10L5/105—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with a mixture of organic and inorganic binders
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Abstract
The invention provides a preparation method and a use method of water-soluble adhesive powder for cold-pressed formed coke, and relates to the technical field of adhesives, wherein the water-soluble adhesive powder for the cold-pressed formed coke comprises the following components in parts by weight: 5-10 parts of suspension dispersant, 0.5-5 parts of cocatalyst, 0.1-0.2 part of buffering agent, 40-55 parts of main material, 30-45 parts of auxiliary material, 4-10 parts of main catalyst, 3-5 parts of diluent, 0.1-0.5 part of reaction terminator and 2-5 parts of drier. Through reasonable proportioning of the raw materials, the finally prepared adhesive powder is green and environment-friendly, convenient to use, small in dosage, high in water-soluble viscosity, high in quality of pressed formed coke and good in chemical activity, and can be widely applied to recycling of metallurgical powder such as coke powder, iron powder, manganese powder and dust ash in industries such as calcium carbide, metallurgy or chemical gas, and the production cost of enterprises is reduced. The formed coke produced by the method has high quality, the single-ball cold compressive strength reaches 750-; meanwhile, the method is also suitable for other various metallurgical powders such as coal, iron powder, manganese powder, dedusting ash and the like.
Description
Technical Field
The invention relates to the technical field of adhesives, in particular to a preparation method and a use method of water-soluble adhesive powder for cold-pressed coke.
Background
When enterprises such as calcium carbide, metallurgy and chemical industry use carbon, a large amount of crushed materials are generated due to reasons such as transportation and screening, and are discarded only because the particle size does not meet the production process requirement, and are often stacked in the open air, so that the hidden danger of environmental pollution is avoided, and the carbon powder resources occupy the production fund of the enterprises and can only be treated as waste materials at low cost. In order to reduce loss, some enterprises adopt inorganic binders such as cement, clay, lime powder, bentonite and the like to produce the molded coal for recycling, and because the binder consumption is large, the ash content is increased, the produced molded coal has poor quality, low heat productivity and low mechanical strength, and can only be used as low-grade coal blocks for combustion. Although various types of adhesives are developed in recent years, some adhesives use sodium humate, coal tar, asphalt, slag mud and other components, although the adhesives are firm, the briquette coal production process is complex, and some adhesives can be used only by carbonization; still other businesses use organic based adhesives, but at higher cost and with too low a thermal strength.
Therefore, in order to solve the problems, a preparation method and a use method of the water-soluble adhesive powder for the cold-pressed coke are needed to be found, so that the composite multi-component polymer formed by common chemical raw materials has unique physical and chemical properties, waste coke powder and semi-coke powder can be recycled efficiently, and the production cost of enterprises is reduced.
Disclosure of Invention
The invention provides a preparation method and a using method of water-soluble adhesive powder for cold-pressed coke, aiming at the problems in the prior art, the composite multi-component polymer is formed by common chemical raw materials, has unique physical and chemical properties, enables waste coke powder and semi-coke powder to be recycled efficiently, and reduces the production cost of enterprises.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention provides water-soluble adhesive powder for cold-pressed formed coke, which comprises the following components in parts by weight: 5-10 parts of suspension dispersant, 0.5-5 parts of cocatalyst, 0.1-0.2 part of buffering agent, 40-55 parts of main material, 30-45 parts of auxiliary material, 4-10 parts of main catalyst, 3-5 parts of diluent, 0.1-0.5 part of reaction terminator and 2-5 parts of drier.
Preferably, the water-soluble adhesive powder for the cold-pressed coke comprises the following components in parts by weight: 5 parts of suspension dispersant, 3 parts of cocatalyst, 0.1 part of buffer, 55 parts of main material, 40 parts of auxiliary material, 8 parts of main catalyst, 5 parts of diluent, 0.2 part of reaction terminator and 5 parts of drier.
Further, the suspension dispersant comprises one or more of sodium metasilicate pentahydrate, sodium metasilicate nonahydrate and attapulgite powder.
Further, the main catalyst is one of caustic soda and caustic potash; the diluent is carbamide; the cocatalyst comprises one of 30% of hydrogen peroxide and potassium permanganate.
Further, the buffer is one of phosphoric acid and citric acid.
Further, the main material is bonding powder GT-F15; the auxiliary material is one or more of soft clay, kaolin and carbide mud.
Further, the reaction terminator comprises one or more of sodium bisulfite, sodium metabisulfite and sodium thiosulfate; the drier comprises one or more of light calcium powder, cement and attapulgite powder.
Further, the weight ratio of the main material to the auxiliary material is 0.9-1.5:1, and preferably 1.375: 1.
Further, the weight ratio of the main catalyst to the cocatalyst is 4-10:3-5, preferably 8: 3.
The invention also provides a preparation method of the water-soluble adhesive powder for the cold-pressed coke, which comprises the following steps:
(1) adding a suspension dispersant and a cocatalyst into water with the temperature of 60-80 ℃ and stirring; adding a buffering agent, adjusting the pH, adding the main material and the auxiliary material, and stirring until the materials are uniformly dispersed to obtain a mixed solution A;
(2) sequentially adding a main catalyst and a diluent into water with the temperature of 60-80 ℃, stirring, and uniformly stirring to obtain a mixed solution B;
(3) and (3) stirring the mixed solution B obtained in the step (2) and the mixed solution A obtained in the step (1) for reaction, then sequentially adding a reaction terminator and a drier, uniformly stirring and dispersing, drying and crushing to obtain the water-soluble adhesive powder for the cold-pressed coke.
Further, the pH in the step (1) is 8 to 9.5, and the reactions in the steps (1) to (3) are generally carried out in a constant temperature reaction kettle; the stirring speed of the mixing and stirring reaction in the step (3) is less than 60r/min, and the reaction time is 5-10 min; the water-soluble adhesive powder for the cold-pressed coke is powder with the particle size content of 200-400 meshes being more than 95% and the moisture content being less than 10%.
The invention also provides a use method of the water-soluble adhesive powder for the cold-pressed coke, which comprises the following steps: mixing the carbon powder with the water-soluble adhesive powder for cold-pressed coke, adding water, stirring uniformly, pressing into wet balls in a semi-moist state, drying, and cooling to normal temperature.
Furthermore, the caking index G value of the carbon powder is less than 5, the moisture content is 8-10%, the particle size of the powder is controlled to be less than 1mm, the particle size accounts for 30-40% of the total amount of the carbon powder, the particle size accounts for 30-40% of 1-2mm, the particle size accounts for 10% of 2-3mm, and the maximum particle size is controlled to be less than or equal to 3 mm.
Further, the addition amount of the water-soluble adhesive powder for the cold-pressed coke is 4-5% of the mass portion of the carbon powder; the pressing is carried out under a pressure of more than 300kg/cm2And the diameter D of the ball body is 50mm, the wet ball is conveyed into a drier by a conveyor belt according to the standard that the wet ball is not broken and scattered when falling to the ground with the height of 2 meters, and is dried for 2.5-3 hours at the temperature of 150 +/-5 ℃ and then is cooled to the normal temperature.
The technical effects obtained by the invention are as follows:
1. the adhesive powder has the advantages of good water-soluble dispersibility, high viscosity, convenient use, environmental protection, wide application, high quality of pressed formed coke, high drying speed, high cold and hot strength, good chemical activity and strong thermal stability, is suitable for recycling coke powder in industries such as calcium carbide, metallurgy or chemical gas and the like, and can correspondingly reduce the production cost of enterprises.
2. The adhesive powder is suitable for non-adhesive coal such as coke powder, blue carbon powder and the like, and the produced formed coke has high quality, high cold and hot strength, good chemical activity and strong thermal stability, the single-ball cold compressive strength reaches 750-1000N, the thermal mechanical strength reaches 500-800N, and the high temperature resistance is higher than 1000 ℃ without powder scattering; meanwhile, the method is also suitable for other various metallurgical powders such as coal, iron powder, manganese powder, dedusting ash and the like.
Detailed Description
It should be noted that the raw materials used in the present invention are all common commercial products, and thus the sources thereof are not particularly limited.
Example 1
The water-soluble adhesive powder for the cold-pressed formed coke comprises the following components in parts by weight: 10 parts of suspension dispersant, 0.5 part of cocatalyst, 0.1 part of buffering agent, 40 parts of main material, 30 parts of auxiliary material, 4 parts of main catalyst, 3 parts of diluent, 0.5 part of reaction terminator and 5 parts of drier. The suspension dispersant is sodium metasilicate pentahydrate, the cocatalyst is 30% hydrogen peroxide, the buffering agent is citric acid, the main material is bonding powder GT-F15, the auxiliary material is carbide mud, the main catalyst is caustic potash, the diluent is carbamide, the reaction terminator is sodium pyrosulfite, and the drier is cement.
The preparation method comprises the following steps:
(1) adding a suspension dispersant and a cocatalyst into water at 60 ℃ and stirring; adding a buffering agent, adjusting the pH value to 8, adding the main material and the auxiliary material, and stirring until the materials are uniformly dispersed to obtain a mixed solution A;
(2) sequentially adding a main catalyst and a diluent into water at 60 ℃, stirring, and uniformly stirring to obtain a mixed solution B;
(3) and (3) stirring the mixed solution B obtained in the step (2) and the mixed solution A obtained in the step (1) for reaction at the stirring speed of 55r/min for 5min, sequentially adding a reaction terminator and a drier, uniformly stirring and dispersing, drying and crushing to obtain the water-soluble adhesive powder for the cold-pressed coke.
Example 2
The water-soluble adhesive powder for the cold-pressed formed coke comprises the following components in parts by weight: 8 parts of suspension dispersant, 5 parts of cocatalyst, 0.2 part of buffer, 45 parts of main material, 45 parts of auxiliary material, 10 parts of main catalyst, 5 parts of diluent, 0.1 part of reaction terminator and 5 parts of drier. The suspension dispersant is attapulgite powder, the cocatalyst is potassium permanganate, the buffering agent is citric acid, the main material is bonding powder GT-F15, the auxiliary material is kaolin, the main catalyst is caustic soda, the diluent is carbamide, the reaction terminator is sodium thiosulfate, and the drier is light calcium powder.
The preparation method comprises the following steps:
(1) adding a suspension dispersant and a cocatalyst into water at 80 ℃ and stirring; adding a buffering agent, adjusting the pH value to 9.5, adding the main material and the auxiliary material, and stirring until the materials are uniformly dispersed to prepare a mixed solution A;
(2) sequentially adding a main catalyst and a diluent into water at the temperature of 80 ℃, stirring, and uniformly stirring to obtain a mixed solution B;
(3) and (3) stirring the mixed solution B obtained in the step (2) and the mixed solution A obtained in the step (1) for reaction at a stirring speed of 45r/min for 10min, sequentially adding a reaction terminator and a drier, uniformly stirring and dispersing, drying and crushing to obtain the water-soluble adhesive powder for the cold-pressed coke.
Example 3
The water-soluble adhesive powder for the cold-pressed formed coke comprises the following components in parts by weight: 5 parts of suspension dispersant, 3 parts of cocatalyst, 0.1 part of buffer, 55 parts of main material, 40 parts of auxiliary material, 8 parts of main catalyst, 5 parts of diluent, 0.2 part of reaction terminator and 5 parts of drier. Wherein the suspending dispersant is sodium silicate nonahydrate, the cocatalyst is 30% of hydrogen peroxide, the buffering agent is phosphoric acid, the main material is bonding powder GT-F15, the auxiliary material is soft clay, the main catalyst is caustic soda, the diluent is carbamide, the reaction terminator is sodium bisulfite, and the drier is attapulgite powder.
The preparation method comprises the following steps:
(1) adding a suspension dispersant and a cocatalyst into water at 70 ℃ and stirring; adding a buffering agent, adjusting the pH value to 9, adding the main material and the auxiliary material, and stirring until the materials are uniformly dispersed to obtain a mixed solution A;
(2) sequentially adding a main catalyst and a diluent into water with the temperature of 70 ℃, stirring, and uniformly stirring to prepare a mixed solution B;
(3) and (3) stirring the mixed solution B obtained in the step (2) and the mixed solution A obtained in the step (1) for reaction at a stirring speed of 50r/min for 8min, sequentially adding a reaction terminator and a drier, uniformly stirring and dispersing, drying and crushing to obtain the water-soluble adhesive powder for the cold-pressed coke.
Comparative example 1
The difference from the example 1 is only that the adhesive powder comprises the following components in parts by weight: 4 parts of suspension dispersant, 6 parts of cocatalyst, 0.1 part of buffering agent, 56 parts of main material, 28 parts of auxiliary material, 11 parts of main catalyst, 2 parts of diluent, 0.6 part of reaction terminator and 1 part of drier.
Comparative example 2
The difference from example 3 is only that the adhesive powder comprises, in parts by weight: 12 parts of suspension dispersant, 0.3 part of cocatalyst, 0.3 part of buffering agent, 36 parts of main material, 47 parts of auxiliary material, 3 parts of main catalyst, 6 parts of diluent, 0.4 part of reaction terminator and 6 parts of drier.
Comparative example 3
The only difference from example 3 is that the weight ratio of the main and auxiliary materials is 0.8:1 (the total weight of the main and auxiliary materials is identical to that of example 3).
Comparative example 4
The only difference from example 3 is that the weight ratio of the main catalyst to the cocatalyst was 3:7 (the total weight of the main catalyst and cocatalyst was identical to that of example 3).
Comparative example 5
The only difference from example 3 is that the preparation process is: (1) adding a suspension dispersant and a cocatalyst into water with the temperature of 50 ℃ and stirring; adding a buffering agent, adjusting the pH value to 7.5, adding the main material and the auxiliary material, and stirring until the materials are uniformly dispersed to prepare a mixed solution A;
(2) sequentially adding a main catalyst and a diluent into water with the temperature of 85 ℃, stirring, and uniformly stirring to obtain a mixed solution B;
(3) stirring at a speed of 65r/min for 12min, sequentially adding a reaction terminator and a drier, uniformly stirring and dispersing, drying and crushing to obtain the cold-pressed coke water-soluble adhesive powder.
First, environmental index detection
The adhesive powder is prepared by the method of the embodiment 1-3, and 2 times of parallel measurement are carried out by adopting corresponding test methods according to the requirements of DB23/1060-2006 coal additive pollution control standard and different test items, and the average value is measured and counted to the table 1.
TABLE 1
As can be seen from Table 1, the adhesive powder prepared by the three methods of examples 1-3 all meet the requirement of DB23/1060-2006 coal additive pollution control Standard, and has no toxic and harmful pollutant components such as heavy metals. Therefore, the raw materials of the method are environment-friendly and nontoxic, the adhesive powder obtained by any proportion in the production process meets the industrial standard, the product does not contain harmful substances such as heavy metal and the like,
second, viscosity index detection
22.5 +/-0.1 g of the adhesive powder finally prepared by the methods of examples 1-3 and comparative examples 1-5 are respectively weighed, mixed with water at 25 ℃ to prepare 500mL of adhesive solution with 4.5% concentration, and subjected to 2 times of viscosity parallel measurement at the constant temperature of 25 ℃ in the environment by using a 'coating-4 viscometer', and the results are counted in tables 2-3.
The viscosity measured by the "smear-4 viscometer" is the time in seconds(s) for which a predetermined amount of sample flows out from a hole having a predetermined diameter at a predetermined temperature. The leaking nozzle hole is blocked by a finger, the glue solution is poured into the viscometer, bubbles and redundant glue solution are scraped into the groove by a glass rod, the finger is loosened, the stopwatch is started immediately, and counting of the stopwatch is stopped when the flow of the sample is interrupted and one drop of the glue solution is dropped. The flowing time of the sample in seconds(s) can be converted into the kinematic viscosity value in centistokes (mm) by the following formula2/s)：
When t is less than 23s, t is 0.154 upsilon +11
When t is more than or equal to 23s and less than 150s, t is 0.223 upsilon +6.0
In the formula: t is the outflow time in units of s; upsilon is kinematic viscosity in mm2/s。
TABLE 2
TABLE 3
As can be seen from Table 2, the kinematic viscosity values of the examples satisfy the following rules, example 3 > example 2 > example 1, wherein the kinematic viscosity value of the adhesive powder prepared by the method of example 3 is the largest and can reach 563.2mm2And s. As can be seen from Table 3, no caking was observed in each of the comparative examples, but the values of the kinematic viscosity averages of comparative example 1 and comparative examples 3 to 5 were significantly lower than those of example 3, and the value of the kinematic viscosity averages of comparative example 2 was significantly lower than that of example 1.
Third, formed coke preparation and index detection
Dividing semi-coke waste from a certain calcium carbide production plant in Ningxia Shizushan city into 8 parts of samples, wherein each part of sample comprises 80 kg of particles with the screening granularity smaller than 1mm, 80 kg of particles with the screening granularity of 1-2mm and 40 kg of particles with the screening granularity of 2-3 mm; 10 kg of each of the adhesive powders prepared by the methods of examples 1 to 3 and comparative examples 1 to 5 was weighed, and each of the adhesive powders was uniformly mixed with the carbon powder sample in an amount of 4.5%, and the mixture was stirred with water to a semi-moist state, and fed into a roll-to-roll molding machine under a pressure of 450kg/cm2Pressing into ellipsoidal coke with diameter of phi 50X 32mm, conveying to a drier by a conveyor belt, drying at 150 deg.C for 2.5 hr, and naturally cooling to room temperature to obtain eight kinds of finished coke products. Corresponding test methods are adopted according to different detection items, 2 times of parallel determination are carried out, and the measured average values are counted to tables 4-5.
TABLE 4
TABLE 5
It should be noted that the strength of the formed coke is related to the pressure of the forming machine, the particle size ratio of the carbon powder, the addition amount of the adhesive powder, the moisture content of the formed coke product and other factors, the above-mentioned formed coke is prepared by adding 4.5% of the adhesive powder prepared by the methods of examples 1-3 and comparative examples 1-5, the cold and hot strength of the formed coke has already reached the requirements of the technical condition standard for briquette for fixed bed gasification of MT/T1010-2006, and the addition amount of the adhesive powder can be correspondingly increased to meet the requirement of higher strength index, which is not described herein again.
And carrying out parallel measurement on the eight finished coke products according to the requirement of the semi-coke index for calcium carbide production GB25211-2010 semi-coke product technical condition for 2 times by adopting corresponding detection methods according to different detection items, and carrying out statistics on the measured average values to tables 6-7.
TABLE 6
TABLE 7
Based on the above measured values, the results of using three kinds of adhesive powders in comparative examples 1 to 3 are as follows:
1. the fixed carbon index of the obtained formed coke is reduced by not more than 2 percent than that of the semi-coke raw material;
2. the index of ash content of the obtained formed coke is improved to not more than 2 percent than that of the semi-coke raw material;
3. the formed coke has lower index of total sulfur than the semi-coke raw material, and the three kinds of adhesive powder have the function of sulfur fixation;
4. the formed coke prepared by the method in the embodiment 3 has the fastest drying speed and the drying and energy-saving effects.
Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The water-soluble adhesive powder for the cold-pressed formed coke is characterized in that: comprises the following components in parts by weight: 5-10 parts of suspension dispersant, 0.5-5 parts of cocatalyst, 0.1-0.2 part of buffering agent, 40-55 parts of main material, 30-45 parts of auxiliary material, 4-10 parts of main catalyst, 3-5 parts of diluent, 0.1-0.5 part of reaction terminator and 2-5 parts of drier.
2. The cold press coke water soluble binder powder of claim 1 wherein: the suspension dispersant comprises one or more of sodium metasilicate pentahydrate, sodium metasilicate nonahydrate and attapulgite powder.
3. The cold press coke water soluble binder powder of claim 1 wherein: the main catalyst is one of caustic soda and caustic potash; the diluent is carbamide; the cocatalyst comprises one of 30% of hydrogen peroxide and potassium permanganate.
4. The cold press coke water soluble binder powder of claim 1 wherein: the buffer is one of phosphoric acid and citric acid.
5. The cold press coke water soluble binder powder of claim 1 wherein: the main material is bonding powder GT-F15; the auxiliary material is one or more of soft clay, kaolin and carbide mud.
6. The cold press coke water soluble binder powder of claim 1 wherein: the reaction terminator comprises one or more of sodium bisulfite, sodium metabisulfite and sodium thiosulfate; the drier comprises one or more of light calcium powder, cement and attapulgite powder.
7. The cold press coke water soluble binder powder of claim 1 wherein: the weight ratio of the main material to the auxiliary material is 0.9-1.5: 1.
8. The cold press coke water soluble binder powder of claim 1 wherein: the weight ratio of the catalyst to the cocatalyst is 4-10: 3-5.
9. The method for preparing the water-soluble binder powder for coke of cold press type according to any one of claims 1 to 8, wherein: the method comprises the following steps:
(1) adding a suspension dispersant and a cocatalyst into water with the temperature of 60-80 ℃ and stirring; adding a buffering agent, adjusting the pH, adding the main material and the auxiliary material, and stirring until the materials are uniformly dispersed to obtain a mixed solution A;
(2) sequentially adding a main catalyst and a diluent into water with the temperature of 60-80 ℃, stirring, and uniformly stirring to obtain a mixed solution B;
(3) and (3) stirring the mixed solution B obtained in the step (2) and the mixed solution A obtained in the step (1) for reaction, then sequentially adding a reaction terminator and a drier, uniformly stirring and dispersing, drying and crushing to obtain the water-soluble adhesive powder for the cold-pressed coke.
10. The method of using the water-soluble binder powder for cold-pressed coke as claimed in any one of claims 1 to 8, wherein: the method comprises the following steps: mixing the carbon powder with the water-soluble adhesive powder for cold-pressed coke, adding water, stirring uniformly, pressing into wet balls in a semi-moist state, drying, and cooling to normal temperature.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760276A (en) * | 2010-01-11 | 2010-06-30 | 北京中科圣宝荷新材料科技有限公司 | Binder for coke powder molding and application method thereof |
| CN102634397A (en) * | 2012-04-12 | 2012-08-15 | 宜宾天原集团股份有限公司 | Preparation technology of briquette binder and product thereof |
| US20150203775A1 (en) * | 2014-01-17 | 2015-07-23 | Enginuity Worldwide, LLC | Biomass fire-log and method of manufacture |
| CN105018170A (en) * | 2015-07-05 | 2015-11-04 | 田东昊润新材料科技有限公司 | Highly-efficient composite briquette binder |
| CN110317651A (en) * | 2019-05-30 | 2019-10-11 | 太原科瑞康洁净能源有限公司 | The method for producing clean formed coke based on alumina transition state binder |
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2020
- 2020-07-08 CN CN202010650941.5A patent/CN111909746A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760276A (en) * | 2010-01-11 | 2010-06-30 | 北京中科圣宝荷新材料科技有限公司 | Binder for coke powder molding and application method thereof |
| CN102634397A (en) * | 2012-04-12 | 2012-08-15 | 宜宾天原集团股份有限公司 | Preparation technology of briquette binder and product thereof |
| US20150203775A1 (en) * | 2014-01-17 | 2015-07-23 | Enginuity Worldwide, LLC | Biomass fire-log and method of manufacture |
| CN105018170A (en) * | 2015-07-05 | 2015-11-04 | 田东昊润新材料科技有限公司 | Highly-efficient composite briquette binder |
| CN110317651A (en) * | 2019-05-30 | 2019-10-11 | 太原科瑞康洁净能源有限公司 | The method for producing clean formed coke based on alumina transition state binder |
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Application publication date: 20201110 |