CN1316492A - Method for producing briquettes with non-adhesive raw coal - Google Patents
Method for producing briquettes with non-adhesive raw coal Download PDFInfo
- Publication number
- CN1316492A CN1316492A CN 01101341 CN01101341A CN1316492A CN 1316492 A CN1316492 A CN 1316492A CN 01101341 CN01101341 CN 01101341 CN 01101341 A CN01101341 A CN 01101341A CN 1316492 A CN1316492 A CN 1316492A
- Authority
- CN
- China
- Prior art keywords
- coal
- viscosity
- moulded
- moulded coal
- cement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
A process for preparing briquettes with non-adhesive raw coal is disclosed. Said briguette is prepared from non-adhesive raw coal powder (100 portions), strong-adhesive coal powder (3-15), and one or more of either acidified starch or cement and clay through mixing them with water, die pressing and solidifying. Its advantages include high performance, low ash addition and low cost.
Description
The present invention relates to a kind of forming method of coal, especially the forming method of the moulded coal of viscosity feed coal not.
The feature of viscous solid fuel is not to lack coking property, comprising: 1, National Standard GB212-92 " characteristic of char residue classification sequence number is the coal of " (1) powdery ", " (2) adhesion " " (3) weak bonding " in " the technical analysis method of coal ", as hard coal, meager coal, most long-flame coal, brown coal or the like; 2, coke powder, petroleum coke powder, wood charcoal powder etc.Be generally≤3mm in order to the raw material granularity of making moulded coal, formed coke, type charcoal (following general designation moulded coal), below be referred to as not viscosity feed coal.
Moulded coal is one of basic form of clean product of coal, is the most easy technological approaches that changes formed severe contamination of grate furnace scatter fire of raw coal and energy dissipation.The key problem in technology of moulded coal manufacturing comprises binding agent component and briquette induration, and it has determined the performance of moulded coal and the economic feasibility that commercialization is used.
Therefore the viscosity feed coal can not form the coke net skeleton of anti-medium and high temperature owing to lack coking property when burning or gasification, causes moulded coal strength degradation under the medium and high temperature state, even efflorescence once again.Separating never the approach of the medium and high temperature performance of viscosity feed coal moulded coal is to add some inorganic type binding agent, as clay, lime etc., but causes the moulded coal ash to increase, and calorific value descends.Though disclosed moulded coal manufacture method has the hundreds of kind, the about 400,000,000 tons of industrial fuel moulded coal markets of China are blank out so far substantially, and its basic reason is that the prior art scheme all fails to break through the industrial production cost bottleneck.And aspect gasification briquette, a series of new solution is many to be difficult to industrial applications because of failing to solve moulded coal too much technical barrier of carry-over under the medium and high temperature state.
The object of the present invention is to provide a kind of binding agent add-on few, can guarantee the basic, normal, high warm nature energy of moulded coal, the ash increment rate is low, is suitable for the manufacture method of moulded coal of the not viscosity feed coal of gentleization of fuel moulded coal moulded coal.
Essential characteristic of the present invention is with the sticking coal of coal, promptly adopt a kind of combined type binding agent (being designated hereinafter simply as the CCT binding agent) that is base stock with strong viscosity coal dust, according to the not character of viscosity feed coal and the purposes of moulded coal thereof, regulate CCT binding agent component, and adopt the briquette induration mode that adapts with it to make the not moulded coal of viscosity feed coal.
The component of the said moulded coal of the present invention is (1) not viscosity powdery feed coal, in (2) strong viscosity coal dust and (3) acidifying starch fluid, cement, the clay one to two kind.Wherein cement and acidifying starch fluid must not compatibilities.Its proportioning is for being 100% to make to calculate benchmark with the weight of viscosity powdery feed coal not, and strong viscosity coal dust is 3%～15%, and the acidifying starch fluid is lower than 1% (starch siccative amount, down with), and cement is lower than 5%, and clay is lower than 10%.Its processing step adds suitable quantity of water mixing moulding, fixed for the each component with said ratio.The granularity of coal dust is 40 orders with carefully, is preferably 200 orders with carefully.
In above-mentioned technology, strong viscosity coal dust is indispensable base stock, is used to guarantee the medium and high temperature strength of moulded coal.Other components then require to make one's options according to feed coal character and moulded coal.The acidifying starch fluid is used to obtain high cold strength, and cement is used to obtain water resisting property and low, medium temperature intensity, and clay is used to improve the moulded coal ash fusion point and strengthens medium and high temperature strength.In industrial applications, need add sulphur-fixing agent, combustion intensification agent etc. separately, this does not influence the performance of CCT binding agent.
Strong viscosity coal dust is meant and meets National Standard GB212-92 " characteristic of char residue classification sequence number is in " the technical analysis method of coal ": " (4) caking without fusion ", " (5) caking with fusion without expansion ", " (6) weak caking with medium-expansion and fusion ", " (7) caking with medium-expansion and fusion ", " (8) caking with strong-expansion and fusion ", etc. the powder made of coal, granularity is 40 orders with carefully, is preferably 200 orders with carefully.The feature of strong viscosity coal dust is to possess strong coking property, and has very big specific surface area, makes moulded coal promptly begin to form coke net skeleton under middle temperature state, and strengthens with the temperature rising, and coke net skeleton can anti-2000 ℃ high temperature.Because moulded coal burning or gasification are a kind of gas, solid out-phase reaction, betide solid phase surface or its shallow-layer, so the coke net skeleton in the moulded coal cinder nuclear still exists.For using the strong viscosity coal dust of swelling property, the micro mist state can utilize gap between the moulded coal feed particles to eliminate the destructive internal stress that coal dust expands and produced when being heated coking, prevents the moulded coal explosion.
The present invention is applicable to the manufacturing of gentleization of fuel moulded coal moulded coal, owing to adopt technical scheme with the sticking coal of coal, the binding agent add-on is few, and especially binding agent had both guaranteed the basic, normal, high warm nature energy of moulded coal based on strong viscosity coal dust, and it is nontoxic, the ash increment rate is very low again, generally is lower than 5%, simultaneously, its concretion technology is simple, therefore can realize the low-cost industrial application.
As everyone knows, industrial applications needs to select suitable CCT binding agent component according to feed coal character, moulded coal purposes and the characteristics of the production and operation thereof, and adopts the consolidation technique that adapts to it.The feed coal kind is many, and character is different.Even same coal also may change because of mining area, coal seam difference.The principal element that coal characteristic influences moulded coal manufacturing and performance thereof has: the composition of coal and ratio thereof; Ash composition and ash fusion point; The size composition of coal and coldmoulding etc.
Industrial shaping coal is divided into gentleization of fuel moulded coal moulded coal two big classes by purposes, their specification of quality, and the market restrained force of production and operation character and tooling cost all has significant difference.
The industrial fuel moulded coal is applied to the grate firing type industrial furnace, mainly is Industrial Boiler.Stove is of a great variety, and the base stock of fuel is had different requirements, generally solves by dynamic blending coals.The industrial fuel moulded coal then is processing and manufacturing on the basis of dynamic blending coals.Compare with gasification briquette, the industrial fuel moulded coal does not have strict demand to going into stove moisture content; Ash fusion point is lower, and general softening temperature ST 〉=1250 ℃ is the top grade product, and gasification briquette ST＞1350 ℃ just are the top grade product; The wide amount of industrial fuel moulded coal user is many, very disperses again, and the overwhelming majority does not have the flue gas desulfurization facility, and gasification briquette then user is concentrated, operation in how self-produced personal, the canopy, the desulfurization facility arranged; Industrial fuel moulded coal optimal average particle size is 10～15mm, minimum particle size should be greater than 3mm, gasification briquette then generally is even spheroid, gasification briquette and lump coal, coke and a large amount of at present lime-carbonated coal balls that uses are relatively, tooling cost has the bigger berth, and the industrial fuel coal price is low, drug on the market in market, and the market restrained force of tooling cost is very big.So the industrial fuel moulded coal must be processed in centralization, socialized service system, and product should possess solid sulphur, anti-water, broken performance of not loosing, and can break through the cost bottleneck of industrial fuel moulded coal suitability for industrialized production in decades, just can finish its commercialization production and operation target.Gasification briquette is how self-produced personal, water resisting property do not had inevitable requirement, but need possess fabulous medium and high temperature performance, comprises ash fusion point, wear resistance and thermostability.So CCT binding agent of " strong viscosity coal dust-cement-clay " component that the industrial fuel moulded coal should be selected to exempt to dry, anti-water, natural curing are fixed; The CCT binding agent of gasification briquette more options " strong viscosity coal dust-acidifying starch fluid-clay " component.
Acidifying starch fluid of the present invention has watery flowability at normal temperatures, with coal dust fabulous affinity is arranged, and can form very thin adhensive membrane, thereby reduced the starch consumption, its starch consumption only is 0.2%～1.0%, reduces 50%～80%, thereby starch adesive is applied on the industrial shaping coal.
Cement is a kind of calcium salt consolidating material of hydraulicity, and as Calucium Silicate powder series cement, calcium aluminate series cement, under certain temperature condition, the CaO in the cement can separate, and its content generally accounts for more than 50% of cement.As everyone knows, CaO is the most frequently used sulfur capture agent for briquette, uses separately mostly to be CaCO
3Or Ca (OH)
2, be again simultaneously burning, the gasification activator of carbon.Therefore, cement possesses bonding, condensation, tachy sterols, consolidates all multiactions such as sulphur, anti-water, activation.For low-sulfur coal (below 1.0%), when the cement add-on reaches 2%～4%, can satisfy the solid sulphur requirement of moulded coal.But for the coal of acid ash, the adding of CaO can cause ash fusion point decline and influence the moulded coal performance, for this reason, needs to add clay and is regulated.
Clay comprises: soft, hard, semi-rigid clay, bauxitic clay and wilkinite etc. are mainly used in the coldmoulding performance that increases feed coal, improve basic, normal, high temperature intensity and ash fusion point.Its kind is selected and the add-on need are decided according to ature of coal and moulded coal purposes.Clay should be processed into 200 orders with carefully, to improve its usefulness.
Below provide some embodiment.
Table 1 provides the example of some feed coals.
Table 1 feed coal
| Kind | Code name | Technical analysis (butt) % | Characteristic of char residue number | ST ℃ | St·d ％ | The extrusion forming performance | ||
| ?Ad | ?Vd | ?FCd | ||||||
| Longyan, Fujian II class hard coal | The dragon II | ?15 | ?3.5 | ?81.5 | (1) | 1220 | ＜1 | Good |
| Zhengzhou III class hard coal | Zheng's III | ?18 | ?9.5 | ?72.5 | (2) | 1430 | ＜1 | Good |
| Jincheng III class hard coal | The Shanxi III | ?13.6 | ?10.5 | ?75.9 | (1) | 1450 | ＜1 | Relatively poor |
| Refreshing mansion non-caking coal | Refreshing | ?10 | ?35 | ?55 | (1) | 1130 | ＜1 | Extreme difference |
Table 2 provides some not examples of the moulded coal manufacture method of viscosity feed coal.
2, consolidation technique: maintenance-refer to stack about 24 hours under the condition of sheltering from heat or light; Dry-refer under (120～150) ℃ condition, be dried to moisture content 3%～5%.3, coal dust-strong viscosity coal dust, characteristic of char residue sequence number (4).</entry></row></tbody></tgroup></table></tables>Can see by table 2 experimental result:
1, most kind moulded coal ash increment rates all are not more than 4%, and refreshing mansion non-caking coal is because insufficient formability, ash fusion point are very low, and the clay add-on is bigger, makes the ash increment rate reach 7%, but the ash of shenfu coal own is extremely low, thereby make moulded coal and still belong to the top grade product.
2, through measuring and calculating, ton briquette binder expense is: 8～12 yuan of fuel moulded coals, about 20 yuan of gasification briquette.
3, the fuel moulded coal and makes its comprehensive process cost at 20 yuan/ton owing to exempt from oven dry.The industry examination of numerous research units is burnt and is shown, use the industrial fuel moulded coal to replace the coal that looses, the stove coal saving rate reaches 10%～25%.
4, when adopting middle and high sulphur coal,, still should add sulphur-fixing agent and solid sulphur promotor, not influence the use of CCT agent of the present invention except that increasing the cement consumption.
Below provide the manufacture method of acidifying starch fluid.
After starch, various grain flour, potato dry powder or bright potato paste (the following starch that all is called) and diluted acid mixing, the about 60min of dextrinization under (110～140) ℃ condition and a kind of mixed solution of forming by fabulous mobile dextrin in aqueous solution and fiber, protein etc. at normal temperature of making, and add micro-borax and do the agent of high connection and solidify promoting.Industrial application can adopt two kinds of non-pressure process and pressurizations.Non-pressure process technology: 1000g starch (siccative amount) peace treaty mixes with the diluted acid that 100ml water and (2～4) ml nitric acid and (3～6) ml hydrochloric acid are made, and in drying and dextrinization below 140 ℃, wherein, ℃ stage should keep about 60min in (110～140).Make dry mash according to the moulded coal arts demand, the borax that adds an amount of hot water and be equivalent to amount of starch 2%～5% is made the acidifying starch fluid of desired concn.The pressing technology method: by above-mentioned starch and acid molar ratio example, add (3～5) times water, make milk sap, in autoclave pressure under (110～140) ℃ condition the about 60min of stirring heating, add the borax of respective amount again, can directly make the acidifying starch fluid.
Claims (2)
1, the moulded coal manufacture method of viscosity feed coal not is characterized in that
1) component of said moulded coal is (1) not viscosity powdery feed coal, one in (2) strong viscosity coal dust and (3) acidifying starch fluid, cement, the clay or two kind, and wherein cement and acidifying starch fluid must not compatibilities;
2) the component proportioning of said moulded coal is for being 100% to make to calculate benchmark with the weight of viscosity powdery feed coal not, and strong viscosity coal dust is 3%～15%, and its granularity is 40 orders with carefully, and the acidifying starch fluid is lower than 1%, and cement is lower than 5%, and clay is lower than 10%:
3) its processing step mixes back extrusion forming, fixed for each component being added suitable quantity of water.
2, the moulded coal manufacture method of not viscosity feed coal as claimed in claim 1, the granularity that it is characterized in that said strong viscosity coal dust are 200 orders with carefully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01101341 CN1119401C (en) | 2001-02-03 | 2001-02-03 | Method for producing briquettes with non-adhesive raw coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01101341 CN1119401C (en) | 2001-02-03 | 2001-02-03 | Method for producing briquettes with non-adhesive raw coal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1316492A true CN1316492A (en) | 2001-10-10 |
| CN1119401C CN1119401C (en) | 2003-08-27 |
Family
ID=4652027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01101341 Expired - Fee Related CN1119401C (en) | 2001-02-03 | 2001-02-03 | Method for producing briquettes with non-adhesive raw coal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1119401C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100351354C (en) * | 2005-12-30 | 2007-11-28 | 西安交通大学 | Honeycomb briquette using starch raw material as adhesive |
| CN105273732A (en) * | 2015-10-10 | 2016-01-27 | 中国矿业大学 | Low rank pulverized coal pyrolysis oil extraction process |
| CN106244277A (en) * | 2016-09-09 | 2016-12-21 | 新疆广汇中化能源技术开发有限公司 | The shaped device of raw coke oven gas high-temperature dust removal ash |
| CN106833790A (en) * | 2017-01-04 | 2017-06-13 | 中国矿业大学(北京) | A kind of method for improving coal briquette for civillan use combustibility |
| CN108026462A (en) * | 2015-09-25 | 2018-05-11 | 株式会社Posco | Moulded coal and preparation method thereof |
| CN110753746A (en) * | 2017-05-16 | 2020-02-04 | 地球科技美国有限责任公司 | Agglomeration of ultra-fine coal particles |
| CN111766122A (en) * | 2020-05-21 | 2020-10-13 | 中国矿业大学 | Remolding structural coal sample material and sample preparation method |
-
2001
- 2001-02-03 CN CN 01101341 patent/CN1119401C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100351354C (en) * | 2005-12-30 | 2007-11-28 | 西安交通大学 | Honeycomb briquette using starch raw material as adhesive |
| CN108026462A (en) * | 2015-09-25 | 2018-05-11 | 株式会社Posco | Moulded coal and preparation method thereof |
| EP3363880A4 (en) * | 2015-09-25 | 2018-08-22 | Posco | Coal briquettes and method for manufacturing same |
| CN105273732A (en) * | 2015-10-10 | 2016-01-27 | 中国矿业大学 | Low rank pulverized coal pyrolysis oil extraction process |
| CN106244277A (en) * | 2016-09-09 | 2016-12-21 | 新疆广汇中化能源技术开发有限公司 | The shaped device of raw coke oven gas high-temperature dust removal ash |
| CN106833790A (en) * | 2017-01-04 | 2017-06-13 | 中国矿业大学(北京) | A kind of method for improving coal briquette for civillan use combustibility |
| CN110753746A (en) * | 2017-05-16 | 2020-02-04 | 地球科技美国有限责任公司 | Agglomeration of ultra-fine coal particles |
| CN111766122A (en) * | 2020-05-21 | 2020-10-13 | 中国矿业大学 | Remolding structural coal sample material and sample preparation method |
| CN111766122B (en) * | 2020-05-21 | 2021-07-30 | 中国矿业大学 | Remolding structural coal sample material and sample preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1119401C (en) | 2003-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1119401C (en) | Method for producing briquettes with non-adhesive raw coal | |
| CN101619387B (en) | Low-temperature concretion adhesive for cold press iron coke and preparation method thereof | |
| CN101629113A (en) | Metallurgical molded coal manufactured by raw materials containing humic acid | |
| CN101724747A (en) | Method for preparing briquetting furnace burden of submerged arc furnace with innocent adhesion and thermal treatment enhancement technology | |
| CN101191088A (en) | Moulded coal and preparation method thereof | |
| CN101029262A (en) | Smokeless carbon coal and its production | |
| CN101696364A (en) | Metallurgical lump coke bonding agent manufactured by using coke powder and preparation method thereof | |
| CN110467953A (en) | The method for producing clean formed coke based on waterglass transition state binder | |
| CN1244668C (en) | Coal for coking prepared from anthracite and coke produced from said coal and production method of said coke | |
| JPS63196689A (en) | Method of molding powdery coke | |
| CN1188792A (en) | Strong waterproof gas generating shaped coal | |
| CN102977965B (en) | Biomass briquette for lime shaft kiln and preparation method thereof | |
| CN101805650B (en) | Briquette for gas producer produced by high volatile bituminous coals and method | |
| CN101812341A (en) | Mechanical-coke and formed-coke quick-volatilizing high-strength adhesive | |
| CN1766071A (en) | Gasifying coal for water gas furnace | |
| CN1101663A (en) | Powdered coal organic adhesive forming technology | |
| CN110452753A (en) | The method for producing clean formed coke based on aluminium dihydrogen phosphate transition state binder | |
| CA3232293A1 (en) | Cold-pressed solid agglomerate, and its production process | |
| CN102851091A (en) | Coal suitable for Texaco pressurizing water-coal-slurry gasification furnace | |
| CN107364866A (en) | A kind of low-order coal prepares the method and compound binding agent of calcium carbide furnace charge | |
| CN106978229A (en) | Inorganic binder and preparation method thereof and the method for preparing mixing pelletizing | |
| CN1456644A (en) | Clean coal cold pressing method without binder | |
| CN100526442C (en) | Adhesive suitable for high-tar briquette and briquette production process | |
| CN1062300C (en) | High strength water-proof industrial briquette | |
| CN1355278A (en) | Composite adhesive for industrial briquettes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |