CN102690070A - Device for feeding desulfurization ash into slag micro powder, and method for feeding desulfurization ash by using device - Google Patents
Device for feeding desulfurization ash into slag micro powder, and method for feeding desulfurization ash by using device Download PDFInfo
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- CN102690070A CN102690070A CN2012101847069A CN201210184706A CN102690070A CN 102690070 A CN102690070 A CN 102690070A CN 2012101847069 A CN2012101847069 A CN 2012101847069A CN 201210184706 A CN201210184706 A CN 201210184706A CN 102690070 A CN102690070 A CN 102690070A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a device for feeding desulfurization ash into slag micro powder, and a method for feeding the desulfurization ash into the slag micro powder by using device. The desulfurization ash in a form of dilute-phase gas and solid phase flow is injected into a pipeline between a mill and a bag-type dust collector, and is mixed with the other dilute-phase gas and solid phase flow of the slag micro powder and flue gas in the pipeline, so that the desulfurization ash can be accurately and quantitatively fed, the feeding amount can be kept highly synchronous with the real-time yield of the production line of the slag micro powder, and the desulfurization ash and the slag micro powder can be mixed uniformly. The temperature of the flue gas is low, so that the phenomenon of bonding caused after the crystal water contained in the desulfurization ash is removed can be avoided, the influence of binder to the working performance of the mill, a belt and other equipment in the production line of the slag micro powder can be effectively reduced, and the reduction of yield and reliability in the conventional production line, which is caused by a mixing method can be prevented.
Description
Technical field
The invention belongs to sulfur removal technology waste desulfurized ash and handle the technical field of using, particularly a kind of desulfurized ash of in slag micropowder, adding is to form the addition means and the device of composite blend.
Background technology
In environment, discharge a large amount of SO2 contaminate environment in order to reduce coal combustion; Generation SO2 when often the element sulphur in the coal fixedly being become solid and prevents to burn with methods such as calcium bases; This kind technique means is called for short desulfurization, and common sulfur method has in desulfurization before the burning, the burning 3 types of desulfurization and burning back desulfurization etc.The essence of desulfurization is to be fixed as solid-state formation desulfurized ash (or desulfurated plaster) to the gasiform sulfurous gas in the flue gas, and desulfurized ash (or desulfurated plaster) need be dealt carefully with equally, otherwise sulphur wherein still can pollute environment.
With the iron and steel enterprise is example, and the SO2 total emission volumn is huge in its sintering (pelletizing) flue gas, and the characteristics of sintering (pelletizing) flue gas make dry method, semi-dry process flue gas desulphurization technology (SDA, CFB etc.) become one of mainstream technology and developing direction.Dry method, semi-dry desulphurization ash fine size, the about 5000cm2/g of specific surface is the mixture of CaSO3, CaSO4, Ca (OH) 2 and CaCl2, water ratio is about 2～3%, flows.Desulfurized ash is disposed for a long time at home, and the world all is a difficult problem.The most employing of iron and steel enterprise concentrates the mode of piling up to handle desulfurized ash at present; Yet there is the inherent defective in this processing mode; Promptly the needed cost of ever-increasing desulfurized ash accumulation keeping also can constantly increase along with constantly carrying out of production; It causes the risk of environmental pollution also constantly to increase simultaneously, must become the unnecessary burden of iron and steel enterprise.
Patent 200410015724.X proposes cement clinker, desulfurized ash, flyash and blast-furnace slag mixed grinding are produced the method for cement.These methods need be set up new production line specially, and cost is bigger.Patent 201010178521.8 proposes to utilize desulfurized ash and slag or flyash to be the main material production insulation blocks, and complete processing is simple, has realized the comprehensive utilization of desulfurized ash.But this method is raw materials used is not all to be produced by iron and steel enterprise, need set up special production line, and one-time investment and production cost are all too high for iron and steel enterprise.
Patent 200910074290.3 proposes desulfurized ash is processed as after the modification desulfurized ash method that becomes eco-cement with cement clinker, slag, slag, exciting agent and water reducer mixed grinding; The raw material of using is mainly iron and steel enterprise's processing waste, can reduce solid waste and can produce economic benefit again.It is major ingredient that patent 201010510854.6 proposes with the desulfurized ash, be aided with slag gypsum cement grog mixed grinding and become the inorganic gel material, and pure mechanical mill production, the high pollution high energy consumption of having avoided calcining to cause, technology is simple, and is with low cost.
The give chapter and verse difference of chloride ion content in the desulfurized ash of patent 200910232147.2; Can smelt iron the by product blast furnace granulated slag in Iron And Steel Plant and add 2～6% desulfurized ash in the slag micropowder that obtain after the oven dry through grinding; Quality to slag micropowder does not have detrimentally affect, and each item index National standard GB/T 18046-2008 " granulated blast-furnace slag that is used for cement and concrete " is to the specification of quality of slag micropowder.
Desulfurized ash added to not only can solve desulfurized ash in the slag micropowder and dispose this troubling difficult problem, and can produce comparatively considerable pair income.With the medium-sized iron and steel enterprise that produces 5000000 tons of pig iron per year is example, and it produces about 2,000,000 tons of slag micropowder per year, produces about 6～100,000 tons of desulfurized ash per year.Calculate if conservatively desulfurized ash is joined in the slag micropowder according to 2% ratio; The current price of desulfurized ash about 10 yuan/ton (usually nobody shows any interest in); The current price of slag micropowder is about 250 yuan/ton, and annual 40000 tons of the desulfurized ash of disposing can form 9,600,000 yuan pair income.
Though reaching the desulfurized ash of certain specific surface requirement can directly add in the slag micropowder according to a certain percentage; But because the adding proportion of desulfurized ash is very little usually; And it is very big as the output of the slag micropowder of bulk materials; What the quality inspection of slag micropowder was adopted is sampling sampling observation system, and this feasible interpolation process has great risk.On the one hand; If the desulfurized ash amount of adding is excessive; Or adition process is inhomogeneous causes that local amount of adding desulfurized ash is excessive, will cause the slag micropowder setting time to prolong, and correlation intensity index and chloride ion content index are defective; Thereby cause the slag micropowder and the concrete works of thousands of tons quality accident to occur, cause very big loss for slag micropowder manufacturer and concrete user.On the other hand, the slag micropowder production line output is big, generally at 90～120t/h.Because the stable foundation of heat power engineering system is more loaded down with trivial details, the stable foundation of the interior material bed of grinding machine is difficulty relatively, so slag micropowder production is very high to the resistance to overturning requirement of whole production wire system.If it is improper that desulfurized ash adds, can cause the grinding machine vibration excessive and influence the ordinary production of slag micropowder.So adopt the adding method of reliable and stable to guarantee that the slag micropowder stay in grade after the interpolation desulfurized ash is very crucial with safety.
Summary of the invention
Goal of the invention: the purpose of this invention is to provide a kind of method and device that in slag micropowder, adds desulfurized ash, under the prerequisite that does not influence original slag micropowder production line, solve the desulfurized ash addition and can't accurately control and add uneven problem.
In order to solve the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of device that in slag micropowder, adds desulfurized ash; Comprise feeding device; Said feeding device connects wind powder mixing device through WT-MSR, airlock successively; Said wind powder mixing device connects source of the gas and wind powder injection device respectively, and said wind powder injection device connects the connecting tube between grinding machines and the sack cleaner through some branch wind pipes respectively, and said some branch wind pipes (22) are evenly distributed on the circumference of same radial section of connecting tube.
Wherein, said WT-MSR is that balance or measuring belt are claimed, turned round to rotor.
Wherein, said source of the gas is air, flue gas or compressed nitrogen.
Use described device in slag micropowder, to add the method for desulfurized ash, may further comprise the steps:
A, through feeding device desulfurized ash is sent into WT-MSR, WT-MSR carries out Weighing to desulfurized ash, and compares with addition data that middle control is set, through feedback control the feeding coal of feeding device is carried out dynamic conditioning;
B, will satisfy in the quantitative desulfurized ash that requires of control send into wind powder mixing device through behind the airlock, aweather the powder mixing device feeds quantitative gas simultaneously, makes desulfurized ash and gas thorough mixing formation Dual-Phrase Distribution of Gas olid; Wherein, described gas is pressurized air, compression flue gas or compressed nitrogen;
C, wind powder injection device is sent in the Dual-Phrase Distribution of Gas olid that obtains; The branch wind pipe that connects through wind powder injection device feeds Dual-Phrase Distribution of Gas olid respectively in the connecting tube between grinding machine and the sack cleaner, and the Dual-Phrase Distribution of Gas olid of carrying desulfurized ash is mixed with the Dual-Phrase Distribution of Gas olid of carrying slag micropowder; Wherein, the mass ratio of desulfurized ash and slag micropowder is 0.01～10%.
Wherein, among the step b, the solid-gas ratio of the Dual-Phrase Distribution of Gas olid of desulfurized ash and gas is 0.1～10; Solid-gas ratio the best of the Dual-Phrase Distribution of Gas olid of desulfurized ash and gas is 1～2.
Wherein, among the step c, the mass ratio of desulfurized ash and slag micropowder is 0.1～6%.
The present invention and existing compared with techniques of in slag micropowder, adding desulfurized ash have following characteristics:
(1) the present invention uses WT-MSR that desulfurized ash is carried out Weighing; Compare with setting addition data; Through feedback control the feeding coal of feeding device is carried out dynamic conditioning; Realized accurately controlling in real time the desulfurized ash additive capacity, the quality that has guaranteed to mix the back slag micropowder makes it satisfy standard GB/T18046-2008 " granulated blast-furnace slag that is used for cement and concrete ".
(2) the present invention is with the form of desulfurized ash with Dual-Phrase Distribution of Gas olid; In the pipeline between grinding machine and sack cleaner; Mix with another burst dilute phase Dual-Phrase Distribution of Gas olid that flue gas forms with slag micropowder; The accurate quantification of not only realizing desulfurized ash adds, and keeps high level of synchronization with the fluctuation of the real-time output of slag micropowder production line, and realizes the uniform mixing of desulfurized ash and slag micropowder simultaneously.Because flue-gas temperature is lower here; Avoid occurring causing the phenomenon that bonds after the contained crystal water dehydration in the desulfurized ash; Reduced the influence of sizing effectively to the serviceability of equipment such as grinding machine, belt in the slag micropowder production line, reduce production capacity that blending means causes for original production line and safety decline,
(3) the present invention mixes through two bursts of dilute phase Dual-Phrase Distributions of Gas olid; Realize the mixing of two kinds of target solid powders; Make degree of mixing more even, stop to occur mixing the inhomogeneous desulfurized ash content overproof that causes, improve the quality stability and the safety of mixing the back slag micropowder.
Description of drawings
Fig. 1 is typical slag micropowder production line synoptic diagram;
Fig. 2 is a principle schematic of in slag micropowder, adding desulfurized ash of the present invention;
Fig. 3 is the metering and the feeding link synoptic diagram of desulfurized ash;
Fig. 4 is the interface schematic cross-section of branch wind pipe and connecting tube;
Fig. 5 is the application synoptic diagram of the present invention in iron and steel enterprise's slag micropowder production line.
Embodiment:
Below in conjunction with accompanying drawing the present invention is done explanation further.
Typical slag micropowder Production Flow Chart is as shown in Figure 1, and blast furnace granulated slag is stored in outdoor stockyard 1, moves to indoor stockyard 2 for some time of banking up through shovel loader and carries out the nature dehydration, through belt 3 blast furnace granulated slag is transported to former feed bin 4 again and carries out buffer memory; Constant feeder 5 is set below former feed bin 4 stably puts into a certain amount of blast furnace granulated slag into mill belt 6; Lifting through going into to grind belt 6 is put into blast furnace granulated slag in the grinding machine 8, and blast furnace granulated slag is ground into ultrafine powder (being slag micropowder) in grinding machine 8; When blast furnace granulated slag was ground into slag micropowder, hotblast stove 7 constantly was blown into hot flue gas in grinding machine 8, slag micropowder by hot flue gas drying and be carried into bagroom 12; Induced draft fan 11 is connected with bagroom 12, will draw through the hot flue gas of bagroom 12, and a derivative hot flue gas part is imported grinding machine 8 internal recycle utilizations once more, and another part is discharged by chimney 10; Carried 14 by bagroom 12 collected slag micropowders through air flume 13, warehouse-in bucket and be delivered in the slag micropowder stockyard 15 and store, at last through automobile (or train, steamer) 16 shippings to the user.
As can beappreciated from fig. 1: desulfurized ash is added to has following 7 opportunitys in the slag micropowder:
1) going into to grind interpolation on the belt 4;
2) in grinding machine 8, add;
3) add in the connecting tube between grinding machine 8 to sack cleaner 12 23;
4) in sack cleaner 12, add;
5) in air flume 13, add;
6) carrying 14 inlet at warehouse-in bucket adds;
7) interpolation before automobile (or train, steamer) 16 outward transports.
For opportunity 1) just as cement very strong absorptive is arranged because desulfurized ash is very dry, the moisture of blast furnace granulated slag is usually 8～15%, and desulfurized ash can be bonded in the surface into mill belt 4, causes the deviation of metering, influences the normal operation of belt 4 simultaneously.
For opportunity 2); Though can avoid opportunity 1) weakness; But between 180～240 ℃, CaSO3 and CaSO4 in the desulfurized ash contain crystal water to grinding machine 8 entrance flue gas temperatures usually, and the partial crystallization elutriation goes out to make desulfurized ash to be bonded in the surface of grinding roller and mill; The grinding machine vibration is strengthened, and the stability of slag micropowder production is affected.Patent 200910232147.2 has proposed a kind of grinding and has mixed the method for carrying out simultaneously, has this result probably.
For opportunity 4), 5) and 6), since mill output according to raw material condition and thermal technology's situation be not both fluctuation, and have very big capacity to make in the fly-ash separator that usually buffer memory has a lot of slag micropowders in the sack cleaner 12.Therefore add to guarantee that desulfurized ash addition and grain slag input amount keep synchronously herein, thereby can't add.
For opportunity 7), equipment such as needs use intensive mixer adopt churned mechanically mode to mix, and measure through modes such as weighing belts, and the one-time investment cost is higher, and economy is relatively poor.
Opportunity 3) guarantee the synchronous of desulfurized ash addition and grain slag input amount the most easily, the production to slag micropowder does not simultaneously exert an influence, and is best implementation therefore.
In the connecting tube 23 between grinding machine 8 to the sack cleaner 12 is the Dual-Phrase Distribution of Gas olid of slag micropowder and flue gas, and solid-gas ratio is about: 0.25～0.6Kg (Gu)/Kg (gas), flue gas flow rate 16～20m/s, 80～90 ℃ of cigarette temperature belong to turbulent flow.In order to obtain mixed effect preferably, the ideal method is that desulfurized ash is also become Dual-Phrase Distribution of Gas olid, and with lower solid-gas ratio, two strands of twos is mixed, and utilizes the turbulent motion of flow of flue gas to obtain high mixing uniformity.Dual-Phrase Distribution of Gas olid is along with the increase of solid-gas ratio, and its flow-pattern develops into stratified flow, pulsating flow and plug flow successively from equal uniform flow.Along with solid-gas ratio reduces, add that air consumption will increase the corresponding increase of energy consumption under the condition of equal desulfurized ash amount.From mixing uniformity and economy angle, the solid-gas ratio of desulfurized ash and gas selection 0.1～10Kg (Gu)/Kg (gas), can obtain excellent comprehensive performances.
Solid-gas ratio described in the present invention is meant: the weight percent of solid weight and gas.
Like Fig. 2, shown in 3 and 4, a kind of device that in slag micropowder, adds desulfurized ash of the present invention comprises feeding device 17, WT-MSR 18, airlock 19, wind powder mixing device 20, wind powder injection device 21, branch wind pipe 22 and source of the gas 25.Feeding device 17 is responsible for supplying with desulfurized ash; Feeding device 17 connects wind powder mixing device 20 through WT-MSR 18, airlock 19 successively; WT-MSR 18 directly by central control system control, is responsible for weighing of desulfurized ash, and WT-MSR 18 can adopt rotor to claim, turn round balance or measuring belt; Rotor claims it is under band press strip spare, to carry out dynamic measurement, and a revolution day gentle measuring belt is under normal pressure, to carry out dynamic measurement; Airlock 19 is responsible for desulfurized ash is sent into the wind powder mixing device 20 that has certain malleation by atmospheric area, and airlock 19 can be air valve, turning valve, spiral pump or revolving plow reclaimer; When WT-MSR 18 adopts rotor to claim, can omit airlock 19.
Wind powder mixing device 20 is a container; Wind powder mixing device 20 connects source of the gas 25 and wind powder injection device 21 respectively; Source of the gas 25 is responsible for aweather feeding required air in the powder mixing device 20, and source of the gas 25 can adopt compressed nitrogen source of the gas, compressed air gas source, also can use blower fan to import air or flue gas from the external world; Wind powder mixing device 20 is responsible for the gas and the desulfurized ash that feed are carried out thorough mixing, forms Dual-Phrase Distribution of Gas olid; The connecting tube 23 that wind powder injection device 21 connects between grinding machine 8 and the sack cleaner 12 through six roots of sensation branch wind pipe 22 respectively; Wind powder injection device 21 is responsible for through branch wind pipe 22 above-mentioned Dual-Phrase Distribution of Gas olid being injected in the connecting tube 23, and wind powder injection device 21 is a transport pipe; The interface of branch wind pipe 22 and connecting tube 23 is evenly distributed on the circumference of connecting tube 23 near the same radial section of grinding machine 8 one sides; And the caliber of each branch wind pipe 22 is identical, can guarantee to feed dilute phase Dual-Phrase Distribution of Gas olid of carrying desulfurized ash and the hot blast uniform mixing that carries slag micropowder in the connecting tube 23 like this.
Use said apparatus, when in slag micropowder, adding desulfurized ash, carry out according to following steps:
A, through feeding device 17 desulfurized ash is sent into WT- MSR 18,18 pairs of desulfurized ash of WT-MSR are carried out Weighing, and compare with addition data that middle control is set, through feedback control the feeding coal of feeding device 17 are carried out dynamic conditioning.
Send into wind powder mixing device 20 behind b, the desulfurized ash process airlock 19 with load weighted satisfied middle control requested number; While source of the gas 25 aweather powder mixing device 20 feeds gases; Make desulfurized ash and gas thorough mixing form Dual-Phrase Distribution of Gas olid; And the solid-gas ratio that guarantees desulfurized ash and the Dual-Phrase Distribution of Gas olid of the formation of gas be 0.1～10Kg (Gu)/Kg (gas), the solid-gas ratio of the best is: 1～2Kg (Gu)/Kg (gas).Wherein, described gas is air, flue gas, pressurized air or compressed nitrogen, and flue gas for example can be an industrial smoke etc.
C, wind powder injection device 21 is sent in the Dual-Phrase Distribution of Gas olid that obtains; The six roots of sensation branch wind pipe 22 that connects through wind powder injection device 21 divides six direction to feed the connecting tube 23 between grinding machine 8 and the sack cleaner 12 in week from encircling the dilute phase Dual-Phrase Distribution of Gas olid, makes Dual-Phrase Distribution of Gas olid of carrying desulfurized ash and the Dual-Phrase Distribution of Gas olid of carrying slag micropowder carry out uniform mixing.Wherein, the mass ratio of desulfurized ash and slag micropowder is 0.01～10%, and the best is 0.1～6%.
Like Fig. 5 is the application synoptic diagram of the present invention in iron and steel enterprise's slag micropowder production line.Slag is delivered to sack cleaner 12 by hot blast after wearing into slag micropowder through grinding machine 8; In the connecting tube 23 of grinding machine 8 and sack cleaner 12, inject desulfurized ash with the form of dilute phase Dual-Phrase Distribution of Gas olid through wind powder injection device 21; Desulfurized ash is mixed the back with slag micropowder and is got into sack cleaner 12 in connecting tube; Sack cleaner 12 separates the wind powder; Powder get into to add the slag micropowder collection device 24 of desulfurized ash, and hot blast is introduced a back part by blower fan 11 and got into chimneys 10, another part with turn back in the grinding machine 8 after hot blast mixes.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (7)
1. device that in slag micropowder, adds desulfurized ash; It is characterized in that: comprise feeding device (17); Said feeding device (17) connects wind powder mixing device (20) through WT-MSR (18), airlock (19) successively; Said wind powder mixing device (20) connects source of the gas (25) and wind powder injection device (21) respectively; Said wind powder injection device (21) connects the connecting tube (23) between grinding machine (8) and the sack cleaner (12) through some branch wind pipes (22) respectively, and said some branch wind pipes (22) are evenly distributed on the circumference of same radial section of connecting tube (23).
2. a kind of device that in slag micropowder, adds desulfurized ash according to claim 1, it is characterized in that: balance or measuring belt are claimed, turned round to said WT-MSR (18) for rotor.
3. a kind of device that in slag micropowder, adds desulfurized ash according to claim 1 and 2, it is characterized in that: said source of the gas (25) is air, flue gas or compressed nitrogen.
4. use the described device of claim 1 in slag micropowder, to add the method for desulfurized ash, it is characterized in that, may further comprise the steps:
A, desulfurized ash is sent into WT-MSR (18) through feeding device (17); WT-MSR (18) carries out Weighing to desulfurized ash; And compare with addition data that middle control is set, through feedback control the feeding coal of feeding device (17) is carried out dynamic conditioning;
B, will satisfy in the quantitative desulfurized ash that requires of control send into wind powder mixing device (20) after through airlock (19), aweather powder mixing device (20) feeds quantitative gas simultaneously, makes desulfurized ash and gas thorough mixing formation Dual-Phrase Distribution of Gas olid; Wherein, described gas is pressurized air, compression flue gas or compressed nitrogen;
C, wind powder injection device (21) is sent in the Dual-Phrase Distribution of Gas olid that obtains; The branch wind pipe (22) that connects through wind powder injection device (21) feeds Dual-Phrase Distribution of Gas olid respectively in the connecting tube (23) between grinding machine (8) and the sack cleaner (12), and the Dual-Phrase Distribution of Gas olid of carrying desulfurized ash is mixed with the Dual-Phrase Distribution of Gas olid of carrying slag micropowder; Wherein, the mass ratio of desulfurized ash and slag micropowder is 0.01～10%.
5. a kind of method of in slag micropowder, adding desulfurized ash according to claim 4, it is characterized in that: among the step b, the solid-gas ratio of the Dual-Phrase Distribution of Gas olid of desulfurized ash and gas is 0.1～10.
6. a kind of method of in slag micropowder, adding desulfurized ash according to claim 5, it is characterized in that: among the step b, the solid-gas ratio of the Dual-Phrase Distribution of Gas olid of desulfurized ash and gas is 1～2.
7. a kind of method of in slag micropowder, adding desulfurized ash according to claim 4, it is characterized in that: among the step c, the mass ratio of desulfurized ash and slag micropowder is 0.1～6%.
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| CN102967151A (en) * | 2012-12-05 | 2013-03-13 | 河南省海皇益民旋窑水泥有限公司 | Blanking device of kiln feeding system |
| CN102967151B (en) * | 2012-12-05 | 2015-12-09 | 安阳中联海皇水泥有限公司 | Enter the blanking equipment of kiln feed system |
| CN103964711A (en) * | 2014-04-18 | 2014-08-06 | 武汉钢铁(集团)公司 | NID desulfurized fly ash wet-grinding modified mineral powder and preparation method thereof |
| CN103964711B (en) * | 2014-04-18 | 2016-05-04 | 武汉钢铁(集团)公司 | NID Desulphurization wet-milling mineral powder modified and preparation method thereof |
| CN104998885A (en) * | 2015-03-06 | 2015-10-28 | 大峘集团有限公司 | Water-saving desulfurized ash dechlorinating method and device |
| CN105502988A (en) * | 2015-12-15 | 2016-04-20 | 武汉钢铁(集团)公司 | Device and method for adding desulfurization ash to slag before grinding |
| CN105502988B (en) * | 2015-12-15 | 2017-07-07 | 武汉钢铁(集团)公司 | To the device and method that Desulphurization is added in slag before grinding |
| CN106007518A (en) * | 2016-05-23 | 2016-10-12 | 武汉钢铁股份有限公司 | Treatment device and treatment method of desulfurization ash |
| CN107673644A (en) * | 2017-11-02 | 2018-02-09 | 福建源鑫环保科技有限公司 | A kind of Vertical Mill mineral admixture production line |
| CN108187895A (en) * | 2017-12-25 | 2018-06-22 | 大峘集团有限公司 | The process and device of a kind of dry method ore grinding selection by winnowing magnetic separation for iron ore |
| CN110776269A (en) * | 2019-10-23 | 2020-02-11 | 江苏沙钢集团有限公司 | Method for treating desulfurized ash by fluidized bed furnace |
| CN111499232A (en) * | 2020-05-08 | 2020-08-07 | 张延年 | Large-mixing-amount industrial solid waste composite Portland cement and preparation method thereof |
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