CN110330993A - A kind of briquetted coal blending coking method based on difunctional binder - Google Patents
A kind of briquetted coal blending coking method based on difunctional binder Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 171
- 238000004939 coking Methods 0.000 title claims abstract description 78
- 239000011230 binding agent Substances 0.000 title claims abstract description 51
- 238000002156 mixing Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000571 coke Substances 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 28
- 238000000465 moulding Methods 0.000 claims abstract description 27
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003830 anthracite Substances 0.000 claims abstract description 18
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 235000019353 potassium silicate Nutrition 0.000 claims description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 239000004484 Briquette Substances 0.000 description 13
- 239000010426 asphalt Substances 0.000 description 6
- 230000009257 reactivity Effects 0.000 description 5
- 230000001588 bifunctional effect Effects 0.000 description 3
- 239000010815 organic waste Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011269 tar Substances 0.000 description 2
- 239000011273 tar residue Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
- C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing additives
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Abstract
一种基于双功能粘结剂的配型煤炼焦方法，属于配型煤炼焦领域，针对现有配型煤炼焦方法存在的问题，目的在于节约保护稀缺炼焦煤资源、充分利用无烟粉煤等无粘结性或弱粘结性煤资源，采用双功能粘结剂，在常温下与成型用煤料混合调湿后送入加压设备成型，成型后型煤按20%~45%的比例与炼焦配煤配合后进入焦炉炼焦。本发明采用的双功能粘结剂原料来源广泛，可满足大规模生产型煤需求；其冷、热态兼具的优良粘结性能，实现了煤料与粘结剂直接冷态粘结和在炼焦受热过程中的粘结；该方法能够在保证焦炭质量前提下大幅提高成型用煤料中无烟煤等非粘结性煤的配比，降低焦炭生产成本，或采用常规炼焦煤制作型煤显著改善焦炭质量，提高经济效益。
A coking method for blended coal based on a dual-functional binder, which belongs to the field of coking for blended coal, aims to save and protect scarce coking coal resources and make full use of anthracite pulverized coal for the problems existing in the existing blended coal coking method Non-caking or weakly caking coal resources, using dual-functional binders, mixed with molding coal materials at room temperature and adjusted in humidity, and then sent to pressurized equipment for molding. After molding, the proportion of briquettes is 20%~45%. After being matched with coking coal blending, it enters the coke oven for coking. The dual-functional binder used in the present invention has a wide range of raw materials and can meet the needs of large-scale production of briquettes; its excellent bonding performance in both cold and hot states realizes direct cold-state bonding of coal materials and binders and Caking in the heating process of coking; this method can greatly increase the proportion of non-caking coal such as anthracite in the coal material used for molding under the premise of ensuring the quality of coke, reduce the cost of coke production, or use conventional coking coal to make briquettes. Improve significantly Improve coke quality and improve economic benefits.
Description
技术领域technical field
本发明属于配型煤炼焦技术领域，具体涉及一种基于双功能粘结剂的配型煤炼焦方法，采用双功能粘结剂，利用无烟煤等非粘结性粉煤配制型煤炼焦的方法。The invention belongs to the technical field of coal blending coking, and in particular relates to a method for coking coal blending based on a dual-functional binder, which adopts a dual-functional binder and utilizes non-caking coal such as anthracite to prepare coal moldings for coking.
背景技术Background technique
我国煤炭资源丰富，其中炼焦煤资源占煤炭资源的37%左右，品种齐全，但其中50%以上为粘结性较弱的高挥发分气煤，粘结性强的肥煤、焦煤不足30%。目前我国焦炭年产量约4.4亿吨，消炼焦煤约5.6亿吨；而在炼焦生产中，为保证焦炭质量，优质炼焦煤的配入量需达50%～60%，即约3.3亿吨，资源储量与需求不相适应的矛盾较为突出。另外，大量无烟粉煤用于发电燃烧，资源利用欠合理，效益利润低。采用配型煤炼焦技术，充分利用价格低廉的无烟粉煤或弱粘结煤，获取稳定的焦炭质量，已成为保护稀缺炼焦资源、降低焦炭生产成本的有效途径，国内外在此方面已进行了大量研究。my country is rich in coal resources, among which coking coal resources account for about 37% of coal resources, and the variety is complete, but more than 50% of them are weakly cohesive high-volatile gas coal, and strong cohesive fat coal and coking coal are less than 30% . At present, the annual output of coke in my country is about 440 million tons, and the consumption of coking coal is about 560 million tons; in coking production, in order to ensure the quality of coke, the amount of high-quality coking coal should reach 50% to 60%, that is, about 330 million tons. The contradiction between resource reserve and demand is more prominent. In addition, a large amount of anthracite pulverized coal is used for power generation and combustion, which leads to unreasonable utilization of resources and low benefits and profits. The use of blended coal coking technology, making full use of cheap anthracite pulverized coal or weakly caking coal, to obtain stable coke quality has become an effective way to protect scarce coking resources and reduce coke production costs. Lots of research.
专利公开号为CN 101333445A、CN 101381645A及CN 101649216A直接从装炉煤中切取一定比例的煤料与焦油渣、焦、煤尘或废塑料等混合，经搅拌、混捏后压制成型；成型后的型煤经皮带送回到装炉煤运输系统，而后供焦炉炼焦使用。此类工艺中，成型用煤料与入炉散煤料相同，主要目的是将焦油渣进行无害化处理，解决焦化环保问题。由于焦油渣存量有限，型煤产量受到限制而不能进行大规模型煤生产，同时也无法利用无烟煤等非粘结性粉煤进行配型煤炼焦。The patent publication numbers are CN 101333445A, CN 101381645A and CN 101649216A. A certain proportion of coal material is directly cut from the furnace coal and mixed with tar residue, coke, coal dust or waste plastics, etc., and then pressed and formed after stirring and kneading; The coal is sent back to the furnace coal transportation system through the belt, and then used for coking in the coke oven. In this type of process, the coal material used for forming is the same as the bulk coal material fed into the furnace, and the main purpose is to carry out harmless treatment of tar residue and solve the environmental protection problem of coking. Due to the limited stock of tar slag, the production of briquettes is limited, so large-scale briquette production cannot be carried out. At the same time, non-caking pulverized coal such as anthracite cannot be used for coking of briquettes.
专利公开号为CN 1919987A，提供了一种利用焦化有机废弃物与弱粘结煤为原料生产型煤的方法及系统，该方法采用焦化厂有机废弃物作为粘结剂，与弱粘结煤按照一定比例均匀混合冷压成型，将此型煤用作炼焦原料，可以达到焦化有机废弃物彻底无害化处理和资源化利用，多配弱粘结煤和改善冶金焦炭质量的综合效果。该专利所述的弱粘结煤主要指炼焦用的气煤和瘦煤，并不包括无烟粉煤、焦粉等无粘结性煤料；另外，焦化有机废弃物还需在外部加热条件下进行预处理，过程复杂且污染物排放严重。The patent publication number is CN 1919987A, which provides a method and system for producing coal briquettes using coking organic waste and weakly caking coal as raw materials. A certain proportion is evenly mixed and cold-pressed, and this coal is used as a coking raw material, which can achieve the comprehensive effect of complete harmless treatment and resource utilization of coking organic waste, more weak caking coal and improved metallurgical coke quality. The weak caking coal mentioned in this patent mainly refers to gas coal and lean coal for coking, and does not include non-caking coal materials such as anthracite pulverized coal and coke powder; in addition, coking organic waste needs to be heated externally The pretreatment process is complex and the discharge of pollutants is serious.
为利用华东地区丰富的弱粘结性煤炭资源，提高焦炭质量，适应高炉需求，宝钢Ⅰ期工程引进了新日铁配型煤炼焦工艺，粘结剂主要采用软沥青—改质石油沥青和焦油沥青，炼焦煤中型煤配入比例约30%，可使气煤等弱粘结煤的配入比例增大15%左右。但工艺流程复杂，占地面积大，投资庞大。In order to utilize the abundant weakly caking coal resources in East China, improve the quality of coke and meet the needs of blast furnaces, Baosteel Phase I project introduced Nippon Steel’s blended coal coking process, and the binder mainly uses soft asphalt—modified petroleum asphalt and tar Asphalt and coking coal are blended in about 30% of the briquette coal, which can increase the blending ratio of gas coal and other weakly caking coals by about 15%. However, the process is complicated, the area is large, and the investment is huge.
鉴于此，宝钢Ⅲ期工程引进了简化流程型煤工艺，其特点是成型用煤料与入炉粉煤的煤比不同，装置占地面积和建设投资明显减少，电、蒸汽等动力消耗显著降低。粘结剂仍为软沥青，型煤配比设定为15%。由于使用软沥青作为粘结剂，使得型煤制作成本增加，难以广泛应用。In view of this, the Baosteel Phase III project introduced a simplified process coal briquette process, which is characterized by a different coal ratio between the coal material used for forming and the pulverized coal fed into the furnace, the area occupied by the device and the construction investment are significantly reduced, and the power consumption such as electricity and steam is significantly reduced . The binder is still soft asphalt, and the briquette ratio is set at 15%. Due to the use of soft asphalt as a binder, the cost of briquette production is increased and it is difficult to be widely used.
发明内容Contents of the invention
本发明针对现有配型煤炼焦方法存在的问题，目的在于节约保护稀缺炼焦煤资源、合理充分利用无烟粉煤等无粘结性或弱粘结性煤资源，提供一种基于双功能粘结剂的配型煤炼焦方法。The present invention aims at the problems existing in the existing blended coal coking method, and aims to save and protect scarce coking coal resources, make full use of non-caking or weakly caking coal resources such as anthracite pulverized coal, and provide a coking coal based on dual functions. Coking method of coking coal with binder.
本发明采用如下技术方案：The present invention adopts following technical scheme:
一种基于双功能粘结剂的配型煤炼焦方法，包括如下步骤：A method for coking coal blending based on a dual-functional binder, comprising the steps of:
在成型用煤料中加入占成型用煤料7~20wt%的双功能粘结剂，在常温下搅拌调湿至水分含量为成型用煤料的8~17wt%，混合均匀后，静置5~20min进行预粘结；Add a dual-functional binder accounting for 7~20wt% of the coal for molding into the coal for molding, stir and adjust the humidity at room temperature until the moisture content is 8~17wt% of the coal for molding, mix well, and let it stand for 5 ~20min for pre-bonding;
将预粘结后的煤料送入加压成型设备，在10~50MPa压力下，成型得到型煤；Send the pre-bonded coal material into the pressure molding equipment, and shape it to obtain briquettes under a pressure of 10~50MPa;
在炼焦配煤中配入占炼焦配煤20~45wt%的型煤后，进入焦炉炼焦；After blending briquettes accounting for 20~45wt% of the coking coal blending into the coking coal blending, enter the coke oven for coking;
所述双功能粘结剂包括如下质量分数的组份：70~92wt%煤基粘结剂、6~23 wt%水玻璃、2~7 wt%聚乙烯醇。The dual-functional binder includes the following components in mass fractions: 70-92wt% coal-based binder, 6-23wt% water glass, and 2-7wt% polyvinyl alcohol.
所述成型用煤料是包括无烟煤、贫煤或焦粉的配合煤或直接从炼焦配煤中切取出的煤料。The coal material for forming is a blended coal including anthracite, lean coal or coke powder, or a coal material cut directly from coking blended coal.
所述配合煤中无烟煤、贫煤或焦粉的比例为占配合煤的40~75 wt%。The proportion of anthracite, lean coal or coke powder in the blended coal is 40-75 wt% of the blended coal.
所述煤基粘结剂包括如下质量分数的组份：100~200目的不黏煤38~55 wt%、溶剂水38~55 wt%、甲醇1~5 wt%和Fe/Na增粘催化剂1~5 wt%，在高压反应釜中均匀混合，并在高压反应釜中通入CO和N2或H2的混合气1~5 MPa，将反应釜升温至310~360℃反应20~60 min制得。The coal-based binder includes the following components in mass fractions: 100-200 mesh non-caking coal 38-55 wt%, solvent water 38-55 wt%, methanol 1-5 wt% and Fe/Na viscosifying catalyst 1 ~5 wt%, mix uniformly in the autoclave, and feed the mixed gas of CO and N2 or H2 into the autoclave at 1~5 MPa, raise the temperature of the autoclave to 310~360℃ and react for 20~60 min be made of.
本发明的有益效果如下：The beneficial effects of the present invention are as follows:
1. 采用该方法生产焦炭，能够在保证焦炭质量前提下大幅提高型煤原料中无烟煤或弱粘结性煤的配比，降低焦炭生产成本；若采用常规炼焦煤制作型煤，则可显著改善焦炭质量，提高经济效益。1. Using this method to produce coke can greatly increase the proportion of anthracite or weakly caking coal in the coal briquette raw material under the premise of ensuring the quality of coke, and reduce the cost of coke production; if conventional coking coal is used to make briquette coal, it can significantly improve Improve coke quality and improve economic benefits.
2. 利用原料来源广泛的双功能粘结剂制备型煤用于炼焦，可实现型煤的大规模生产，以满足配型煤炼焦需求；双功能粘结剂兼具优良的冷、热态粘结性能，煤料与粘结剂可直接进行冷态粘结，尤其是其中的煤基粘结剂可与无烟煤在炼焦加热过程中可通过形成碳-碳聚合结构来实现煤料粘结。2. The use of dual-functional binders with a wide range of raw materials to prepare briquettes for coking can realize large-scale production of briquettes to meet the needs of coking with briquettes; the dual-function binder has both excellent cold and hot viscosity Coal material and binder can be directly bonded in cold state, especially the coal-based binder can be bonded with anthracite coal by forming a carbon-carbon polymer structure during coking heating.
3. 双功能粘结剂中70~92 wt%为煤基粘结剂，突破了国内外研发机构以软沥青、改性沥青等有机粘结剂为主的范畴，解决了该类有机类粘结剂价格昂贵的难题。3. 70~92 wt% of the dual-functional binders are coal-based binders, breaking through the category of soft asphalt, modified asphalt and other organic binders in domestic and foreign research and development institutions, and solving the problem of such organic binders. The problem of expensive binders.
附图说明Description of drawings
图1为本发明实施例1的流程图；Fig. 1 is the flowchart of embodiment 1 of the present invention;
图2为本发明实施例3的流程图。Fig. 2 is a flow chart of Embodiment 3 of the present invention.
具体实施方式Detailed ways
实施例1Example 1
1. 双功能粘结剂的制备1. Preparation of Bifunctional Binder
按照质量比为反应性较弱的200目不黏煤38 wt%、水55 wt%、甲醇3 wt%和Fe/Na增粘催化剂4 wt%在高压反应釜中均匀混合，而后在反应釜中通入CO和少量H2的混合气5 MPa（其中CO含量为95 vol%），将反应釜升温至350℃反应45 min制得煤基粘结剂。According to the mass ratio, 38 wt% of 200 mesh non-caking coal with weak reactivity, 55 wt% of water, 3 wt% of methanol and 4 wt% of Fe/Na viscosifying catalyst were uniformly mixed in the autoclave, and then in the reactor A mixture of CO and a small amount of H 2 was introduced at 5 MPa (the CO content was 95 vol%), and the reactor was heated to 350 °C for 45 min to prepare the coal-based binder.
将70 wt%煤基粘结剂、23 wt%水玻璃、7 wt% 聚乙烯醇均匀混合制得双功能粘结剂。A dual-functional binder was prepared by uniformly mixing 70 wt% coal-based binder, 23 wt% water glass, and 7 wt% polyvinyl alcohol.
2. 配煤2. Coal blending
如图1所示，成型用煤料的配比为：气煤20 wt%，肥煤15 wt%，焦煤15 wt%，无烟煤50wt%。炼焦配煤的配比为：气煤20%，肥煤30%，焦煤35%，瘦煤15%。As shown in Figure 1, the proportion of coal materials for molding is: gas coal 20 wt%, fat coal 15 wt%, coking coal 15 wt%, anthracite 50 wt%. The proportion of coking coal blending is: gas coal 20%, fat coal 30%, coking coal 35%, lean coal 15%.
3. 配型煤炼焦3. Blending briquette coking
在成型用煤料中加入20 wt%的双功能粘结剂，并在常温下搅拌调湿至水分含量为成型用煤料的15 wt%，混合均匀后静制20 min进行预粘结；将预粘结后煤料连续送入加压成型设备，并在40 MPa压力下成型制得型煤。Add 20 wt% of dual-functional binder to the coal material for molding, and stir and adjust the humidity at room temperature until the moisture content is 15 wt% of the coal material for molding. After pre-bonding, the coal material is continuously fed into the press molding equipment, and molded under a pressure of 40 MPa to obtain briquettes.
制得的型煤在皮带机上与炼焦配煤按照一定比例同步混合输送至煤塔，而后进入焦炉在1100℃~1350℃的温度下进行炼焦。型煤配入量为炼焦配煤的30 wt%。The prepared briquettes are synchronously mixed with coking coal blending in a certain proportion on the belt conveyor and transported to the coal tower, and then enter the coke oven for coking at a temperature of 1100°C~1350°C. The briquette blending amount is 30 wt% of the coking coal blending.
试验焦炭样按国家标准测试焦炭质量指标。包括：抗碎强度（M40）和耐磨性能指标（M10）、反应性（CRI）和反应后强度（CSR），试验结果如表1所示。The test coke samples are tested for coke quality indicators according to national standards. Including: crushing strength (M 40 ) and wear resistance index (M 10 ), reactivity (CRI) and post-reaction strength (CSR). The test results are shown in Table 1.
采用基于双功能粘结剂的配型煤炼焦方法，用于成型用煤料中大幅增加了无烟煤配入量，但焦炭质量指标基本保持同一水平，获得了强度指标优异的冶金焦炭，大大节约了炼焦成本。Using the coking method of blended coal based on dual-functional binders, the amount of anthracite used in the coal for molding has been greatly increased, but the coke quality index has basically remained at the same level, and metallurgical coke with excellent strength index has been obtained, which greatly saves Coking cost.
表1 焦炭质量指标Table 1 Coke quality index
实施例2Example 2
1. 双功能粘结剂的制备1. Preparation of Bifunctional Binder
按照质量比为反应性较弱的150目不黏煤45 wt%、水49 wt%、甲醇3 wt%和Fe/Na增粘催化剂3 wt%在高压反应釜中均匀混合，而后在反应釜中通入CO和少量H2的混合气4.5 MPa（其中CO含量为95 vol%），将反应釜升温至340℃反应40 min制得煤基粘结剂。According to the mass ratio, 45 wt% of 150 mesh non-caking coal with weak reactivity, 49 wt% of water, 3 wt% of methanol and 3 wt% of Fe/Na viscosifying catalyst were uniformly mixed in the autoclave, and then A mixture of CO and a small amount of H 2 at 4.5 MPa (with a CO content of 95 vol%) was introduced, and the reactor was heated to 340 °C for 40 min to prepare a coal-based binder.
将80 wt%煤基粘结剂、17 wt%水玻璃、3 wt% 聚乙烯醇均匀混合制得双功能粘结剂。A dual-functional binder was prepared by uniformly mixing 80 wt% coal-based binder, 17 wt% water glass, and 3 wt% polyvinyl alcohol.
2. 配煤2. Coal blending
如图1所示，成型用煤料的配比为：气煤20 wt%，肥煤20wt%，焦煤20wt%，无烟煤40 wt%。炼焦配煤的配比为：气煤20%，肥煤30%，焦煤35%，瘦煤15%。As shown in Figure 1, the proportion of coal materials for molding is: gas coal 20 wt%, fat coal 20 wt%, coking coal 20 wt%, anthracite 40 wt%. The proportion of coking coal blending is: gas coal 20%, fat coal 30%, coking coal 35%, lean coal 15%.
3. 配型煤炼焦3. Blending briquette coking
在成型用煤料中加入15 wt%的双功能粘结剂，并在常温下搅拌调湿至水分含量为成型用煤料的13 wt%，混合均匀后静制15 min进行预粘结；将预粘结后煤料连续送入加压成型设备，并在30 MPa压力下成型制得型煤。Add 15 wt% of dual-functional binder to the coal material for molding, and stir and adjust the humidity at room temperature until the moisture content is 13 wt% of the coal material for molding. After pre-bonding, the coal material is continuously fed into the press molding equipment, and molded under a pressure of 30 MPa to obtain briquettes.
制得的型煤在皮带机上与炼焦配煤按照一定比例同步混合输送至煤塔，而后进入焦炉在1100℃~1350℃的温度下进行炼焦。型煤配入量为炼焦配煤的35 wt%。The prepared briquettes are synchronously mixed with coking coal blending in a certain proportion on the belt conveyor and transported to the coal tower, and then enter the coke oven for coking at a temperature of 1100°C~1350°C. The briquette blending amount is 35 wt% of the coking coal blending.
试验焦炭样按国家标准测试焦炭质量指标。包括：抗碎强度（M40）和耐磨性能指标（M10）、反应性（CRI）和反应后强度（CSR），试验结果如表1所示。The test coke samples are tested for coke quality indicators according to national standards. Including: crushing strength (M 40 ) and wear resistance index (M 10 ), reactivity (CRI) and post-reaction strength (CSR). The test results are shown in Table 1.
采用基于双功能粘结剂的配型煤炼焦方法，用于成型用煤料中大幅增加了无烟煤配入量，但焦炭质量指标基本保持同一水平，获得了强度指标优异的冶金焦炭，大大节约了炼焦成本。Using the coking method of blended coal based on dual-functional binders, the amount of anthracite used in the coal for molding has been greatly increased, but the coke quality index has basically remained at the same level, and metallurgical coke with excellent strength index has been obtained, which greatly saves Coking cost.
表2 焦炭质量指标Table 2 Coke quality indicators
实施例3Example 3
1. 双功能粘结剂的制备1. Preparation of Bifunctional Binder
质量比为反应性较弱的100目不黏煤55 wt%、水43 wt%、甲醇1 wt%和Fe/Na增粘催化剂1 wt%在高压反应釜中均匀混合，而后在反应釜中通入CO和少量N2的混合气4.0 MPa（其中CO含量为90 vol%），将反应釜升温至330℃反应30 min制得煤基粘结剂。The mass ratio is 55 wt% of 100-mesh non-caking coal with weak reactivity, 43 wt% of water, 1 wt% of methanol and 1 wt% of Fe/Na viscosifying catalyst. The mixed gas of CO and a small amount of N 2 was injected at 4.0 MPa (in which the CO content was 90 vol%), and the temperature of the reactor was raised to 330 °C for 30 min to prepare the coal-based binder.
将92 wt%煤基粘结剂、6 wt%水玻璃、2 wt% 聚乙烯醇均匀混合制得双功能粘结剂。A dual-functional binder was prepared by uniformly mixing 92 wt% coal-based binder, 6 wt% water glass, and 2 wt% polyvinyl alcohol.
2. 配煤2. Coal blending
如图2所示，成型用煤料为直接从炼焦配煤中切取出的煤料，因此其配比与炼焦配煤的配比相同，为：气煤25%，肥煤20%，焦煤25%，瘦煤30%。As shown in Figure 2, the coal material for forming is the coal material directly cut from the coking coal blending, so its proportion is the same as that of coking coal blending, which is: gas coal 25%, fat coal 20%, coking coal 25% %, lean coal 30%.
3. 配型煤炼焦3. Blending briquette coking
在成型用煤料中加入10 wt%的双功能粘结剂，并在常温下搅拌调湿至水分含量为成型用煤料的10 wt%，混合均匀后静制10 min进行预粘结；将预粘结后煤料连续送入加压成型设备，并在15 MPa压力下成型制得型煤。Add 10 wt% of dual-functional binder to the coal material for molding, and stir and adjust the humidity at room temperature until the moisture content is 10 wt% of the coal material for molding. After pre-bonding, the coal material is continuously fed into the press molding equipment, and molded under a pressure of 15 MPa to obtain briquettes.
制得的型煤在皮带机上与炼焦配煤按照一定比例同步混合输送至煤塔，而后进入焦炉在1100℃~1350℃的温度下进行炼焦。型煤配入量为炼焦配煤的45 wt%。The prepared briquettes are synchronously mixed with coking coal blending in a certain proportion on the belt conveyor and transported to the coal tower, and then enter the coke oven for coking at a temperature of 1100°C~1350°C. The briquette blending amount is 45 wt% of the coking coal blending.
试验焦炭样按国家标准测试焦炭质量指标，试验结果如表3所示。Test coke samples were tested for coke quality indicators according to national standards, and the test results are shown in Table 3.
在相同原料煤条件下，采用基于双功能粘结剂的配型煤炼焦方法，可减少优质焦肥煤的配入量，且获得各项指标优于常规配煤炼焦生产的焦炭，提高了产品的经济效益。Under the same raw coal conditions, the coking method of blended coal based on dual-functional binders can reduce the amount of high-quality coke fat coal blended, and the obtained indicators are better than coke produced by conventional coal blending coking, which improves the product quality. economic benefits.
表3 焦炭质量指标Table 3 Coke quality index
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