CN105779061A - Composite binder for semicoke powder forming and method for preparing formed coke - Google Patents
Composite binder for semicoke powder forming and method for preparing formed coke Download PDFInfo
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- CN105779061A CN105779061A CN201610308476.0A CN201610308476A CN105779061A CN 105779061 A CN105779061 A CN 105779061A CN 201610308476 A CN201610308476 A CN 201610308476A CN 105779061 A CN105779061 A CN 105779061A
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- C—CHEMISTRY; METALLURGY
- 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 discloses a composite binder for semicoke powder forming. The composite binder contains the following ingredients in percentage by weight: 50wt% to 60wt% of sodium humate, 10wt% to 20wt% of bentonite and 20wt% to 40wt% of coal slurry. The invention also discloses a method for preparing formed coke. The method comprises the following steps: (1) crushing semicoke blocks into semicoke powder with the particle size smaller than 3mm; (2) adding the composite binder into the semicoke powder, and carrying out stirring and mixing so as to obtain a mixture; (3) adding water into the mixture, and carrying out stirring and mixing again so as to obtain a mixture; (4) carrying out press forming on the mixture obtained after carrying out stirring and mixing again in a paired-roller ball press, and then, carrying out natural air-drying or drying in a dryer, thereby obtaining the formed coke. According to the composite binder disclosed by the invention, the recycling of waste can be achieved, and raw materials can be obtained from local resources, so that the composite binder is economical and practical; according to the process for preparing the formed coke, disclosed by the invention, the equipment requirements are low, the forming pressure is low, and the energy consumption is low, so that the process has an important significance in protecting the environment, reducing production cost and improving economic benefit.
Description
Technical field
The invention belongs to coal chemical industry field, be specifically related to a kind of compound binding agent for semi-coke powder molding and the method preparing formed coke.
Background of invention
Semicoke, also known as semi-coke, by the flammable solid product of coal low temperature distillation gained.In semicoke production process, semi-coke powder less than 3mm accounts for 10%, this part semi-coke powder does not meet manufacturing technique requirent because granularity is little and is taken as conventional fuel and inexpensively processes, even directly being thrown aside in river course or the edge of a field, this is not only the waste of the energy, also results in production cost and rises, economic benefit declines, the more important thing is that the semi-coke powder of air storage is exposed to the weather, fly upward everywhere, environment is caused serious dust pollution.
Therefore, utilize the cold briquetting process of semi-coke powder to prepare formed coke, can solve production cost and rise and problem of environmental pollution; formed coke after molding can replace lump coke to be used for electric furnace; for improving the use value of semi-coke powder, protect environment, reduce production cost and have great importance.Cold briquetting process commonly used at present is prepared needs during formed coke and is carried out extrusion forming under 60～180MPa briquetting pressure, and therefore briquetting pressure is relatively big, and energy consumption is high, and coal blending is more, and molding effect is not good.Binding agent is allocated into reduce energy consumption reduction cost accordingly, it would be desirable to be used in semicoke.
The binding agent used on the market at present is mostly following two, and the first is made up of two kinds of components of A, B, and wherein component A adhesive, adhesion promoter, filler form；B component is surface modifier.The mixture that described adhesive is any one among vegetable protein glue, polyvinyl alcohol, starch ethers or cellulose ethers or their more than one arbitrary proportions form；Described adhesion promoter is Borax or boric acid；Described filler is bentonite, wollastonite or Kaolin；Described surface modifier is amino silane coupler.This kind of binding agent mostly is polymer substance, and needs it is modified, and therefore cost is too high, is unfavorable for industrial-scale production；
Summary of the invention
It is contemplated that one of technical problem solved at least to a certain extent in correlation technique.For this, a kind of method that it is an object of the present invention to propose compound binding agent for semi-coke powder molding and prepare formed coke, each Component Source of this compound binding agent is extensive and cheap, can gather materials on the spot, and economical and practical, can realize again refuse reclamation.Meanwhile, formed coke produced by the present invention achieves higher comprcssive strength and drop strength.
In one aspect of the invention, the invention provides a kind of compound binding agent for semi-coke powder molding.According to embodiments of the invention, the described compound binding agent for semi-coke powder molding, comprising following components: 50～60wt% sodium humate, 10～20wt% bentonite and 20～40wt% coal slime, described wt% is weight %.
Thus, each Component Source of compound binding agent according to embodiments of the present invention is extensive and cheap, and wherein each ingredient origin is extensive and cheap, can gather materials on the spot, and economical and practical, can realize again refuse reclamation.
In some embodiments of the invention, moisture < 10wt%, granularity < 100 orders of described sodium humate.Thus, it is possible to significantly improve comprcssive strength and the drop strength of gained formed coke.
In some embodiments of the invention, described bentonitic granularity < 100 orders.Thus, it is possible to significantly improve comprcssive strength and the drop strength of gained formed coke.
In some embodiments of the invention, moisture < 40wt%, fixed carbon < 15wt% of described coal slime.Thus, it is possible to significantly improve comprcssive strength and the drop strength of gained formed coke.
In another aspect of this invention, the invention provides a kind of method preparing formed coke, it comprises the steps:
(1) half coke button is broken into the semi-coke powder less than 3mm；
(2) by described semi-coke powder adds the compound binding agent of the present invention, after agitated mixing, mixture is become；
(3) by described mixture adds water, again mix and blend, mixture is obtained；
(4) mixture obtained after mix and blend again is put in pair roller ball press compressing, naturally dry afterwards or dry in dehydrator, obtain formed coke；
Wherein the compound binding agent of the present invention comprises following components: 50～60wt% sodium humate, 10～20wt% bentonite and 20～40wt% coal slime, and described wt% is weight %.
Thus, the method preparing formed coke according to embodiments of the present invention is by carrying out mixed-forming by the binding agent of the present invention and semicoke, it is possible to obtain the formed coke with advantages of higher compressive strength and drop strength.
It addition, semicoke forming method according to the above embodiment of the present invention can also have following additional technical characteristic: the percentage by weight of described semi-coke powder, described compound binding agent and described water is respectively as follows: 80.0wt%～83.3wt%, 8.4wt%～12.0wt% and 8wt%～8.3wt%.Thus, it is possible to significantly improve comprcssive strength and the drop strength of gained formed coke.
In some embodiments of the invention, in step (4), pressure compressing in pair roller ball press is under 10-15MPa.Thus, it is possible to significantly improve comprcssive strength and the drop strength of gained formed coke.
The present invention is found through experiments, and the comprcssive strength of the formed coke of the present invention may be up to 300N, and drop strength may be up to 12 times/, produced formed coke be fully able to meet replace lump coke again with demand.And in process of production, the binding agent wide material sources that use and cheap, can gather materials on the spot, and economical and practical, refuse reclamation can be realized again.
In one aspect of the invention, the present invention proposes a kind of compound binding agent for semi-coke powder molding.According to embodiments of the invention, this compound binding agent comprises following components: 50～60wt% sodium humate, 10～20wt% bentonite and 20～40wt% coal slime, described wt% is weight %.Each Component Source of this compound binding agent is extensive and cheap, can gather materials on the spot, and economical and practical, can realize again refuse reclamation.
Bentonite has strong hygroscopicity and dilatancy, and the water yield of adsorbable 8～15 times of own vols, volumetric expansion is up to several times to 30 times；Being dispersed into as a form of gel and suspension in aqueous medium, this medium solution has certain viscosity, thixotropy and lubricity；There is stronger cation exchange capacity (CEC)；Various gases, liquid, organic substance are had certain absorbability, and maximal absorptive capacity is the weight of self up to 5 times；It with water, the admixture of mud or fine sand there is plasticity and cohesiveness；There is surface-active acid bleaching soil (active hargil, natural bleaching soil-Emathlite) coloured ion can be adsorbed, therefore can serve as the binding agent making semi-coke powder preparation become formed coke, but the amount being single use bentonitic words interpolation is big, and can increase ash, reduces calorific value；And if the amount of interpolation is little, the intensity of preparation-obtained formed coke is inadequate again.
Coal slime has certain mobility, therefore result in the stacking of coal slime, storage and transport all relatively difficult.Especially when storing up, its form extremely unstable, meet water and namely run off, air-dry namely fly upward.Result not only wastes the coal resources of preciousness, and causes serious environmental pollution, sometimes even constrains the normal production of coal washery.Owing to typically containing more clay class mineral in coal slime, moisture is higher in addition, and granularmetric composition is thin, so most of coal slime stickiness is big.And owing to coal slime refers to the semi-solid thing of the moisture formation of coal dust, it is a kind of product in coal production process, therefore can serve as the binding agent making semi-coke powder preparation become formed coke, can gather materials on the spot, and economical and practical, refuse reclamation can be realized again.The coal slime of the present invention can also adopt power plant etc. and factory around to carry out the coal slime produced in power generation process, such as, power plant is when using coal, need to carry out coal washing etc. and process the process of coal, in the process, producing a large amount of coal slime, this kind of coal slime utilizes nearby, it is possible to avoid produced Financial cost of transporting for long-distance.
Sodium humate is a kind of macromole organic monoacid sodium salt with several functions being processed into for raw material through special process with weathered coal, peat and brown coal, and its nontoxic odorless is corrosion-free, is highly soluble in water, it it is multi-functional macromolecular compound, containing more active groups such as hydroxyl, quinonyl, carboxyls, there is very big internal surface area, there is stronger absorption, exchange, complexation, sequestering power, therefore can serve as the binding agent making semi-coke powder preparation become formed coke.The sodium humate of the present invention can be obtained by buying pattern, it is also possible to is prepared by following method:
Take humic acid brown coal, adding water wherein and making solution concentration is 33.3wt%, it is subsequently added the sheet alkali accounting for humic acid brown coal quality 7%, it is heated to 100 degree and is sufficiently stirred for reaction 40 minutes, then by the solution cooling of preparation, and after drying 24 hours at 100 DEG C, grind to form the fine powder being of a size of less than 100 microns.
In another aspect of the present invention, the invention allows for a kind of method preparing formed coke, including: half coke button is broken into the semi-coke powder less than 3mm；By described semi-coke powder adds the compound binding agent according to any one of claim 1-4, after agitated mixing, become mixture；By described mixture adds water, again mix and blend, obtain mixture；The mixture obtained after mix and blend again is put in pair roller ball press compressing, naturally dries afterwards or dry in dehydrator, obtain formed coke.Wherein, described compound binding agent is foregoing compound binding agent.
Thus, the method preparation technology preparing formed coke of the above embodiment of the present invention is simple, by adopting foregoing compound binding agent as binding agent, by semi-coke powder, compound binding agent and water mix, put in pair roller ball press compressing, obtain formed coke, not only low for equipment requirements, briquetting pressure is little, consume energy low, also can solve production cost to rise and problem of environmental pollution, formed coke after molding can replace lump coke to be used for electric furnace, for improving the use value of semi-coke powder, protection environment, reduce production cost, increase economic efficiency and have great importance
According to a particular embodiment of the invention, above-mentioned prepare semi-coke powder in formed coke, compound binding agent is mixed homogeneously according to the percentage by weight of 80.0wt%～83.3wt%, 8.4wt%～12.0wt% and 8wt%～8.3wt% respectively with water.Thus, this percentage by weight is adopted above-mentioned semi-coke powder, compound binding agent to be mixed with water, it is possible to improve comprcssive strength and the drop strength of formed coke further.
According to a particular embodiment of the invention, above-mentioned preparing in formed coke that sodium humate moisture is less than 10 weight %, granularity is less than 100 orders.Thus adopt this water content and particle size range can be effectively improved sodium humate absorption, exchange, complexation, sequestering power, and then be conducive to improving comprcssive strength and the drop strength of formed coke.
According to a particular embodiment of the invention, above-mentioned prepare in formed coke bentonitic granularity less than 100 orders, adopt the bentonite of this particle size range to be conducive to improving its hygroscopicity and dilatancy, and then be conducive to improving comprcssive strength and the drop strength of formed coke.
According to a particular embodiment of the invention, above-mentioned to prepare pressure compressing in pair roller ball press in formed coke be 10～15mpa, and this pressure limit briquetting pressure is less, and energy consumption is low, and molding effect is preferably.
Introduce embodiment of the present invention below by way of detailed description of the invention further clearly and completely and had the advantage that, but the embodiment introduced is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the premise not making creative work, broadly fall into protection scope of the present invention.
Detailed description of the invention
Below with reference to specific embodiment, present invention is described, it is necessary to explanation, and these embodiments are only illustrative, and do not limit the present invention in any way.
The evaluation index related in following embodiment and method of testing:
1. intensity test method: it is measure on LDS-Y10A pellet pressure test machine that agglomerate is placed in model, and load speed executed by pressure testing machine is 10mm/min.
2. drop resistant strength test method: drop on rubber plate by pelletizing to 50 centimeter eminence, dropping to broken number of times is drop resistant intensity.
3. the water content method of testing of formed coke: formed coke is heated higher than at the temperature of water boiling point, the change of weight before and after contrast heating, if continuous heating, weight is constant, then dehydration is complete, the weight now lost and the weight of water, is exactly water content than the weight before upper heating.
Embodiment 1
Raw material: sodium humate, bentonite, coal slime.
The preparation method of compound binding agent:
First by sodium humate, bentonite is levigate to less than 100 orders, weighing 55g sodium humate, 18g bentonite, 27g coal slime, puts into uniform stirring mixing in batch mixer and is semicoke molding binding agent.
Prepare formed coke:
(1) 1kg half coke button is broken into the semi-coke powder less than 3mm；
(2) in described semi-coke powder, add above-mentioned 100g compound binding agent, after agitated mixing, become mixture；
(3) in described mixture, add 100g water, again mix and blend, obtain mixture；
(4) mixture obtained after mix and blend again is put in pair roller ball press compressing under pressure 15MPa, naturally dry afterwards or dry in dehydrator, obtain formed coke.
Above-mentioned gained formed coke moisture < 2%, mean compressive strength is 208N, and average drop strength is 8 times/.
Said method is adopted to prepare formed coke not only low for equipment requirements; briquetting pressure is little; consume energy low; also can solve production cost to rise and problem of environmental pollution; formed coke after molding can replace lump coke to be used for electric furnace; for improve semi-coke powder use value, protect environment, reduce production cost, increasing economic efficiency has great importance.
Embodiment 2
Raw material: sodium humate, bentonite, coal slime.
The preparation method of compound binding agent:
First by sodium humate, bentonite is levigate to less than 100 orders, weighing 72g sodium humate, 18g bentonite, 42g coal slime, puts into uniform stirring mixing in batch mixer and is semicoke molding binding agent.
Prepare formed coke:
(1) 1kg half coke button is broken into the semi-coke powder less than 3mm；
(2) in described semi-coke powder, add above-mentioned 120g compound binding agent, after agitated mixing, become mixture；
(3) in described mixture, add 100g water, again mix and blend, obtain mixture；
(4) mixture obtained after mix and blend again is put in pair roller ball press compressing under pressure 15MPa, naturally dry afterwards or dry in dehydrator, obtain formed coke.
Above-mentioned gained formed coke moisture < 2%, mean compressive strength is 220N, and average drop strength is 12 times/.
Said method is adopted to prepare formed coke not only low for equipment requirements; briquetting pressure is little; consume energy low; also can solve production cost to rise and problem of environmental pollution; formed coke after molding can replace lump coke to be used for electric furnace; for improve semi-coke powder use value, protect environment, reduce production cost, increasing economic efficiency has great importance.
Embodiment 3
Raw material: sodium humate, bentonite, coal slime.
The preparation method of compound binding agent:
First by sodium humate, bentonite is levigate to less than 100 orders, weighing 75g sodium humate, 30g bentonite, 45g coal slime, puts into uniform stirring mixing in batch mixer and is semicoke molding binding agent.
Prepare formed coke:
(1) 1kg half coke button is broken into the semi-coke powder less than 3mm；
(2) in described semi-coke powder, add above-mentioned 150g compound binding agent, after agitated mixing, become mixture；
(3) in described mixture, add 100g water, again mix and blend, obtain mixture；
(4) mixture obtained after mix and blend again is put in pair roller ball press compressing under pressure 15MPa, naturally dry afterwards or dry in dehydrator, obtain formed coke.
Above-mentioned gained formed coke moisture < 2%, mean compressive strength is 300N, and average drop strength is 10 times/.
Said method is adopted to prepare formed coke not only low for equipment requirements; briquetting pressure is little; consume energy low; also can solve production cost to rise and problem of environmental pollution; formed coke after molding can replace lump coke to be used for electric furnace; for improve semi-coke powder use value, protect environment, reduce production cost, increasing economic efficiency has great importance.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention.In this manual, what the schematic representation of above-mentioned term is not necessarily referring to is identical embodiment or example.And, the specific features of description, structure, material or feature can combine in one or more embodiments in office or example in an appropriate manner.Additionally, when not conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be carried out combining or combining by those skilled in the art.
Although above it has been shown and described that embodiments of the invention, it is understandable that, above-described embodiment is illustrative of, it is impossible to be interpreted as limitation of the present invention, and above-described embodiment can be changed, revises, replace and modification by those of ordinary skill in the art within the scope of the invention.
Claims (8)
1. the compound binding agent for semi-coke powder molding, it is characterised in that comprising following components: 50～60wt% sodium humate, 10～20wt% bentonite and 20～40wt% coal slime, described wt% is weight %.
2. the compound binding agent for semi-coke powder molding according to claim 1, it is characterised in that < 10wt%, < 100 orders, described wt% is weight % to granularity to the moisture of described sodium humate.
3. the compound binding agent for semi-coke powder molding according to claim 1, it is characterised in that described bentonitic granularity < 100 orders.
4. the compound binding agent for semi-coke powder molding according to claim 1, it is characterised in that < described wt% is weight % to the moisture of described coal slime for 40wt%, fixed carbon < 15wt%.
5. one kind utilizes the method that the compound binding agent according to any one of claim 1-4 prepares formed coke, it is characterised in that comprise the steps:
(1) half coke button is broken into the semi-coke powder less than 3mm；
(2) by described semi-coke powder adds the compound binding agent according to any one of claim 1-4, after agitated mixing, mixture is become；
(3) by described mixture adds water, again mix and blend, mixture is obtained；
(4) mixture obtained after mix and blend again is put in pair roller ball press compressing, naturally dry afterwards or dry in dehydrator, obtain formed coke.
6. the method preparing formed coke according to claim 5, it is characterized in that, the percentage by weight of described semi-coke powder, described compound binding agent and described water is respectively as follows: 80.0wt%～83.3wt%, 8.4wt%～12.0wt% and 8wt%～8.3wt%, and described wt% is weight %.
7. the method preparing formed coke according to claim 5, it is characterised in that pressure compressing in pair roller ball press is under 10-15MPa.
8. the method preparing formed coke according to claim 5, it is characterised in that moisture < 10wt%, granularity < 3mm of described semi-coke powder.
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| CN201610308476.0A CN105779061A (en) | 2016-05-11 | 2016-05-11 | Composite binder for semicoke powder forming and method for preparing formed coke |
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| CN201610308476.0A CN105779061A (en) | 2016-05-11 | 2016-05-11 | Composite binder for semicoke powder forming and method for preparing formed coke |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109797019A (en) * | 2019-02-28 | 2019-05-24 | 内蒙古万众炜业科技环保股份公司 | A kind of open air barbecue charcoal producing technique |
| CN112725050A (en) * | 2020-12-09 | 2021-04-30 | 陕西北元化工集团股份有限公司 | Preparation method of semi-coke pellets |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109797019A (en) * | 2019-02-28 | 2019-05-24 | 内蒙古万众炜业科技环保股份公司 | A kind of open air barbecue charcoal producing technique |
| CN112725050A (en) * | 2020-12-09 | 2021-04-30 | 陕西北元化工集团股份有限公司 | Preparation method of semi-coke pellets |
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