CN103923721B - Fluoride solidifying agent for treating fluorine pollution caused by burning coal and preparation method and application method thereof - Google Patents
Fluoride solidifying agent for treating fluorine pollution caused by burning coal and preparation method and application method thereof Download PDFInfo
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Abstract
The invention discloses a fluoride solidifying agent for treating fluorine pollution caused by burning coal. The fluoride solidifying agent is prepared by the following steps of respectively weighing calcium magnesium acetate, aluminum sulfate, sodium carbonate and potassium carbonate according to the molar ratio of ca2+, Al3+, Na+ to K+, wherein the molar ratio is 30: 1.5: 3: 2-4.5; evenly mixing the calcium magnesium acetate, the aluminum sulfate, the sodium carbonate and the potassium carbonate; grinding the mixture through a 180 mesh-300 mesh screen; adding water with the weight 6-12 times that of the mixture into the mixture; heating the mixture to the temperature of 70 DEG C-90 DEG C; stirring the mixture for two to six hours; drying the mixture at the temperature of 100 DEG C-120 DEG C; grinding the mixture through the temperature of 70 DEG C-90 DEG C. Compared with the calcium carbonate serving as the traditional fluoride solidifying agent, porosity and specific surface area of the fluoride solidifying agent are increased greatly, fluoride can be solidified effectively during coal burning, and fluoride content in high-temperature smoke is reduced effectively. Compared with the calcium magnesium acetate serving as the fluoride solidifying agent independently, effect in removing fluoride in high-temperature smoke is more remarkable. Furthermore, the preparation method of the fluoride solidifying agent is simple, and raw material price and production cost are low. The method for solidifying fluoride during coal burning by utilizing the fluoride solidifying agent is easy to implement.
Description
Technical field
The invention belongs to environmental pollution prevention and control technical field, be specifically related to a kind of fluorine fixing material administered for coal-fired fluoride pollution, its preparation method, and apply the method that this fluorine fixing material solidifies fluorine in coal combustion process.
Background technology
Fluorine is the trace element that in coal, content is higher, and mostly at 20 ~ 500mg/kg, mean value is about 150mg/kg.In coal combustion process, along with the rising of temperature of combustion, the eduction rate of fluorine increases gradually, starts to separate out when 280 DEG C, and when when when 300 DEG C, eduction rate is 0.8%, 900 DEG C, eduction rate is 75.8%, 1200 DEG C, eduction rate is 97.3%.Fluorochemical at high temperature generates HF, SiF
4, CF
4deng gas pollutant.These pollutent parts are captured rear tax by fly-ash separator and are existed in flying dust, and small part remains in lime-ash, and remaining major part is discharged in air, not only heavy corrosion boiler and flue gas purifying equipment, and causes the destruction of air fluoride pollution and ecotope.
Coal burn induced fluorosis becomes endemy in China, and the fluorine element of long-term excess intake can cause chronic fluorosis, and main manifestations is dental fluorosis and skeletal fluorosis.Research shows, causes Greenhouse effect and the global warming problem, above the Antarctic Ozone hole problem, acid rain problem etc. of World Focusing, all relevant with anthropogenic discharge's fluorochemical.For the coal-fired fluorine emission problem become increasingly conspicuous, the improvement of power station and Industrial Boiler, the coal-fired fluoride pollution of kiln has started starting.
At present, two mains direction of studying that fluorine element technology is the coal-fired fluoride pollution problem of solution are solidified in wash-out fluorine contaminant technology and coal combustion process in high-temperature flue gas.In high-temperature flue gas, wash-out fluorine contaminant technology refers in the flue before fly-ash separator to utilize alkali lye drip washing or spray the methods such as alkaline fluorine fixing material and removes fluorine contaminant; Solidify fluorine element technology in coal combustion process then to refer to and in coal, mix fluorine fixing material in advance or spray fluorine fixing material in combustion chamber, thus in coal combustion process, fluorine is solidificated in cinder.
Summary of the invention
In view of this, an object of the present invention is to provide a kind of fluorine fixing material administered for coal-fired fluoride pollution, efficiently can solidify fluorine element in coal combustion process; Two of object is the preparation method providing this fluorine fixing material, low in raw material price, and prepare easy, cost is low; Three of object is to provide this fluorine fixing material of a kind of application in coal combustion process, solidify the method for fluorine, easy and simple to handle.
After deliberation, the invention provides following technical scheme:
1. the preparation method of the fluorine fixing material administered for coal-fired fluoride pollution, comprises the following steps: by Ca
2+, Al
3+, Na
+, K
+the mol ratio of ion is that 30:1.5:3:2-4.5 takes a certain amount of calcium acetate magnesium salt CaMg respectively
2(CH
3cOO
6), Tai-Ace S 150 Al
2(SO
4)
3, sodium carbonate Na
2cO
3with salt of wormwood K
2cO
3, Homogeneous phase mixing, ground 180-300 mesh sieve, then add the water being equivalent to mixture weight 6-12 times amount, 70-90 DEG C of heated and stirred 2-6 hour, last 100-120 DEG C drying, ground 180-300 mesh sieve, obtains fluorine fixing material.
Preferably, described preparation method comprises the following steps: by Ca
2+, Al
3+, Na
+, K
+the mol ratio of ion is that 30:1.5:3:2 takes a certain amount of calcium acetate magnesium salt, Tai-Ace S 150, sodium carbonate and salt of wormwood respectively, Homogeneous phase mixing, ground 300 mesh sieves, add the water being equivalent to mixture weight 6-12 times amount again, 70-90 DEG C of heated and stirred 2-6 hour, last 100-120 DEG C drying, ground 300 mesh sieves, obtain fluorine fixing material.
Preferred, described preparation method comprises the following steps: by Ca
2+, Al
3+, Na
+, K
+the mol ratio of ion is that 30:1.5:3:2 takes a certain amount of calcium acetate magnesium salt, Tai-Ace S 150, sodium carbonate and salt of wormwood respectively, Homogeneous phase mixing, ground 300 mesh sieves, add the water being equivalent to mixture weight 10 times amount again, 80 DEG C of heated and stirred 2 hours, last 120 DEG C of dryings, ground 300 mesh sieves, obtain fluorine fixing material.
2. adopt the fluorine fixing material that described preparation method obtains.
3. apply the method that described fluorine fixing material solidifies fluorine in coal combustion process, comprise the following steps: raw coal is dry, and ground 180-300 mesh sieve, gained coal dust and fluorine fixing material are, after 100:1-10 Homogeneous phase mixing, carry out high-temp combustion at 900-1200 DEG C in mass ratio.
Preferably, described application fluorine fixing material solidify in coal combustion process fluorine method, comprise the following steps: raw coal is dry, and ground 300 mesh sieves, gained coal dust and fluorine fixing material are, after 100:1 Homogeneous phase mixing, carry out high-temp combustion at 1100 DEG C in mass ratio.
Beneficial effect of the present invention is: the present invention by calcium substrate material calcium acetate magnesium salt and modulator Tai-Ace S 150, sodium carbonate and salt of wormwood by certain C a
2+, Al
3+, Na
+, K
+mol ratio is filled a prescription, and has obtained a kind of fluorine fixing material administered for coal-fired fluoride pollution.Wherein, the Transport And Transformation of the calcium in calcium acetate magnesium salt to fluorine has obvious intervention capacity; Tai-Ace S 150, sodium carbonate and salt of wormwood can improve the microscopic voids structure of calcium substrate material significantly, promote the increase of calcium substrate material pore volume, specific surface area and endoporus voidage.Fluorine fixing material of the present invention compares traditional coal-fired fluorine fixing material calcium carbonate, and porosity and specific surface area are greatly improved, and efficiently can solidify fluorine element in coal combustion process, effectively reduces the Oil repellent in high-temperature flue gas; Compare separately using calcium acetate magnesium salt as fluorine fixing material, more remarkable to the defluorination effect of high-temperature flue gas.In addition, the preparation method of this fluorine fixing material is easy, low in raw material price, and production cost is low; Applying this fluorine fixing material, in coal combustion process, solidify the method for fluorine easy and simple to handle.Therefore, this fluorine fixing material administers field at coal-fired fluoride pollution good application prospect, and ecnomics and enviroment comprehensive benefit is remarkable.
Accompanying drawing explanation
In order to make object of the present invention, technical scheme and beneficial effect clearly, the invention provides following accompanying drawing and being described:
Fig. 1 is that the specific pore volume of fluorine fixing material of the present invention and traditional coal-fired fluorine fixing material calcium carbonate amasss-pore diameter distribution comparison diagram.
Fig. 2 is the hole count-pore diameter distribution comparison diagram of fluorine fixing material of the present invention and traditional coal-fired fluorine fixing material calcium carbonate.
Fig. 3 is the electron-microscope scanning figure of fluorine fixing material of the present invention.
Fig. 4 is the impact that fluorine fixing material adds the coal-fired fluorin volatilization rate of comparison.
Fig. 5 is the impact of temperature of combustion on coal-fired fluorin volatilization rate.
Fig. 6 is the solid fluorine effect of different additive under equal experiment condition.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
One, the preparation of fluorine fixing material of the present invention
1, particle diameter, modulator kind and modulation ion mol ratio is ground on the impact of the solid fluorine effect of fire coal
In high temperature coal process, calcium ion is the active sites of the solid fluorine of absorption and chemistry, and the solidification of fluorine is realized by the effect of catching of calcium substrate material to fluorine.In order to improve the efficiency of fixing fluorine further, physico-chemical process can be utilized from the modification angle of additive to improve the porosity of calcium substrate material and specific surface area and to improve the activity of calcium ion.In order to improve calcium substrate material and coal-fired contact area, can be levigate by it by the method for physical grinding.The present invention is according to early-stage Study result, and select calcium acetate magnesium salt to be calcium substrate material, sodium carbonate, salt of wormwood and Tai-Ace S 150 are modulator, by changing grinding particle diameter, modulator kind and modulation ion mol ratio, to obtaining the optimal effectiveness of coal-fired fluorine solidification.
Experiment adopts the orthogonal experiment of Three factors-levels non-interaction action, and each level of factor is in table 1.By Ca
2+take a certain amount of calcium acetate magnesium salt and modulator respectively, Homogeneous phase mixing with the mol ratio of modulator metal ion, grinding is sieved, add the water being equivalent to mixture weight 10 times amount again, 80 DEG C of heated and stirred 2 hours, last 120 DEG C of dryings, grinding is sieved, obtained fluorine fixing material; By fluorine fixing material adding than being added in coal sample by 1wt%, under 1100 DEG C of combustion conditionss, carry out combustion testing.Orthogonal experiments is in table 2.Orthogonal test the results of analysis of variance is in table 3.
Table 1 orthogonal test level of factor table
Table 2 orthogonal experiments
| Experiment sequence number | Grinding particle diameter (order) | Modulator kind | Modulation ion mol ratio | Fluorin volatilization rate (%) | Gu fluorine rate (%) |
| 1 | 3 | 3 | 1 | 23.14 | 76.86 |
| 2 | 1 | 2 | 3 | 29.82 | 70.18 |
| 3 | 3 | 1 | 3 | 28.56 | 71.44 |
| 4 | 1 | 3 | 2 | 26.52 | 73.48 |
| 5 | 2 | 3 | 3 | 23.34 | 76.66 |
| 6 | 3 | 2 | 2 | 24.32 | 75.68 |
| 7 | 2 | 2 | 1 | 25.23 | 74.77 |
| 8 | 2 | 1 | 2 | 32.11 | 67.89 |
| 9 | 1 | 1 | 1 | 36.38 | 63.62 |
Table 3 orthogonal test the results of analysis of variance
As can be seen from Table 2, particle diameter is 300 orders, modulator is Tai-Ace S 150, modulation ion mol ratio can obtain best fluorine solidification effect when being 10 when grinding, and fluorin volatilization rate is minimum.As can be seen from Table 3, the solidification effect impact of modulator kind on combustion PAHs in coal is the most remarkable, and grinding particle diameter takes second place, and the impact of modulation ion mol ratio on fluorine solidification effect is minimum.
2, the optimization of ion mol ratio is modulated
Although aforementioned orthogonal test display, relative to grinding particle diameter and modulator kind two factors, the solidification effect impact of modulation ion mol ratio on fluorine in coal-fired process is minimum, but the quantification of modulation ion mol ratio is very important in later stage industry and engineering construction and application process.Because above-mentioned orthogonal experiments shows, when grinding particle diameter and being identical with modulation ion mol ratio, the impact of modulator kind on fluorine effect solid in fire coal is followed successively by from big to small: Tai-Ace S 150 > salt of wormwood > sodium carbonate.Therefore, best Ca be determined
2+, Al
3+, Na
+, K
+mol ratio, first can determine best Ca
2+with Al
3+mol ratio, then introduce Na on this basis
+and K
+, by adjustment Ca
2+with Na
+, K
+mol ratio and Na
+with K
+mol ratio, final obtain best Ca
2+, Al
3+, Na
+, K
+mol ratio.
By Ca shown in table 4
2+with Al
3+mol ratio take a certain amount of calcium acetate magnesium salt and Tai-Ace S 150 respectively, Homogeneous phase mixing, ground 300 mesh sieves, then add the water being equivalent to mixture weight 10 times amount, 80 DEG C of heated and stirred 2 hours, last 120 DEG C of dryings, ground 300 mesh sieves, obtained fluorine fixing material; By fluorine fixing material adding than being added in coal sample by 1wt%, under 1100 DEG C of combustion conditionss, carrying out combustion testing, calculating fluorin volatilization rate.The results are shown in Table 4.
Table 4Ca
2+with Al
3+mol ratio on the impact of fluorin volatilization rate
| Ca 2+:Al 3+(mol/mol) | 20:0.5 | 20:1 | 20:2.5 | 20:4 | 20:8 |
| Fluorin volatilization rate (%) | 35.23 | 31.75 | 31.54 | 31.98 | 31.12 |
As shown in Table 4, except Ca
2+with Al
3+mol ratio be outside 40:1 group, other fluorin volatilization rate difference measured by 4 groups of mol ratios is very little, considers experimental error, can think Ca
2+with Al
3+mol ratio be increased to 20:8 by 20:1, on fluorin volatilization rate substantially without impact.Therefore, Ca is determined
2+with Al
3+mol ratio be 20:1 be optimum mole ratio.
Fixation of C a
2+with Al
3+mol ratio be 20:1, by Ca shown in table 5
2+, Al
3+, Na
+, K
+mol ratio take a certain amount of calcium acetate magnesium salt, Tai-Ace S 150, sodium carbonate and salt of wormwood respectively, Homogeneous phase mixing, ground 300 mesh sieves, add the water being equivalent to mixture weight 10 times amount again, 80 DEG C of heated and stirred 2 hours, last 120 DEG C of dryings, ground 300 mesh sieves, obtained fluorine fixing material; By fluorine fixing material adding than being added in coal sample by 1wt%, under 1100 DEG C of combustion conditionss, carrying out combustion testing, calculating fluorin volatilization rate.The results are shown in Table 5.
Table 5Ca
2+with Na
+, K
+mol ratio on the impact of fluorin volatilization rate
| Ca 2+:Al 3+:Na +:K +(mol/mol/mol) | Fluorin volatilization rate (%) |
| 30:1.5:2.0:3.0 | 36.24 |
| 30:1.5:2.0:4.0 | 34.13 |
| 30:1.5:3.0:2.0 | 19.01 |
| 30:1.5:3.0:4.5 | 21.74 |
| 30:1.5:3.0:6.0 | 24.87 |
| 30:1.5:5.0:3.0 | 33.56 |
| 30:1.5:5.0:4.0 | 32.48 |
| 30:1.5:6.5:3.5 | 22.13 |
| 30:1.5:7.5:4.5 | 26.10 |
| 30:1.5:7.5:6.0 | 23.94 |
As shown in Table 5, Ca is worked as
2+, Al
3+, Na
+, K
+mol ratio when being 30:1.5:3:2, the solid fluorine effect of the fluorine fixing material modulated is best.
3, the preparation of best fluorine fixing material and Micro-Structure Analysis thereof
Particle diameter (300 order) and Ca is ground by aforementioned the best determined
2+, Al
3+, Na
+, K
+optimum mole ratio (30:1.5:3:2), take a certain amount of calcium acetate magnesium salt CaMg respectively
2(CH
3cOO
6), Tai-Ace S 150 Al
2(SO
4)
3, sodium carbonate Na
2cO
3with salt of wormwood K
2cO
3, Homogeneous phase mixing, ground 300 mesh sieves, then add the water being equivalent to mixture weight 10 times amount, 80 DEG C of heated and stirred 2 hours, last 120 DEG C of dryings, ground 300 mesh sieves, obtained best fluorine fixing material.
Reaction between calcium substrate material and vapor-phase fluoride belongs to heterogeneous gas-solid reaction, before generation chemosetting, and must first through physical adsorption process.Only make the abundant adsorptive gaseous fluorochemical of fluorine fixing material, the vapor-phase fluoride produced in coal-fired process could finally be solidified effectively, and stably stays under the high temperature conditions in coal ash.And the number of the capacity of water of fluorine fixing material adsorbed gas, the adsorbed gas scale of construction is determined by the microtexture of fluorine fixing material.If fluorine fixing material short texture, porosity is large, and specific surface area is large, and the physical resistance of chemical reaction is little, then physical adsorbability is good, and gaseous pollutant can be made fully to contact with fluorine fixing material surface, improves fluorine fixing material utilization ratio and solid fluorine efficiency.
The present invention adopts the full-automatic mercury injection apparatus of PoreMaster-33 to carry out Micro-Structure Analysis to above-mentioned obtained best fluorine fixing material, contrasts with traditional coal-fired fluorine fixing material calcium carbonate simultaneously.The results are shown in Figure 1 and Fig. 2, the specific pore volume of calcium carbonate amasss the aperture place that peak value concentrates on about 3.5 μm, and maximum value is 158.7 × 10
3cm
3(g μm)
-1, hole count is distributed as 0.2 ~ 4.5 μm; The specific pore volume of fluorine fixing material of the present invention amasss the aperture place that peak value concentrates on about 2 μm, and maximum value is 367.2 × 10
3cm
3(g μm)
-1, hole count is distributed as 0.03 ~ 1 μm.Can find from these data, the phenomenon that the specific pore volume sum hole count of fluorine fixing material of the present invention is moved relative to all oriented left avertence of calcium carbonate relative to the peak value of pore diameter distribution, the distribution density namely in pore diameter range increases.In addition, the porosity of fluorine fixing material of the present invention calcium carbonate compared with specific surface area adds 1.42 times and 1.23 times respectively.
Fig. 3 is the electron-microscope scanning figure of above-mentioned obtained best fluorine fixing material.Can be found by figure, Tai-Ace S 150, sodium carbonate and salt of wormwood are embedded between organic calcium particle, and there occurs certain chemical reaction, the microcosmic district surface irregularity of fluorine fixing material, space is flourishing, large aperture association, makes the porosity of calcium substrate material (calcium acetate magnesium salt) and specific surface area be greatly improved.
Two, the method for fluorine fixing material of the present invention solid fluorine in fire coal
1, fluorine fixing material add than with the impact of temperature of combustion on the solid fluorine effect of fire coal
Temperature of combustion is the very important factor of impact one of coal-fired heavy metal transformation.And while the solid fluorine effect of guarantee, determine the minimum ratio that adds of fluorine fixing material under equal conditions, the engineering that can effectively reduce in industrial application process drops into and fund input.For this reason, the present invention investigated fluorine fixing material add than with the impact of temperature of combustion on the solid fluorine effect of fire coal.
Accurately take the coal sample of 4 groups of totally 16 parts of each 1.0g, aforementioned obtained best fluorine fixing material is added than being added in each group of coal sample respectively by 1wt%, 3wt%, 5wt% and 10wt%, after Homogeneous phase mixing, under 900 DEG C, 1000 DEG C, 1100 and 1200 DEG C combustion conditionss, carry out combustion testing respectively, calculate fluorin volatilization rate.The results are shown in Table 6 and Fig. 4-5.
Table 6 fluorine fixing material add than with the impact of temperature of combustion on the solid fluorine effect of fire coal
As shown in Table 6, when fluorine fixing material adds than when being 1100 DEG C for 10wt%, temperature of combustion, fluorin volatilization rate minimum (18.0%).
Fig. 4 and Fig. 5 be respectively fluorine fixing material add than with the impact of temperature of combustion on coal-fired fluorin volatilization rate.As shown in Figure 4, under the condition that temperature of combustion is constant, along with fluorine fixing material add than increase, coal-fired fluorin volatilization rate reduces.As shown in Figure 5, add than under constant condition at fluorine fixing material, the influence curve of temperature of combustion to coal-fired fluorin volatilization rate is concave, and obtains minimum value 1100 DEG C time.Because temperature of combustion is 1100 DEG C, fluorine fixing material adds than when being increased to 10wt% by 1wt%, the change of fluorin volatilization rate only 1%, therefore, consider engineering involved in the application of coal-fired fluorine retention later stage to drop into and fund input, determine that temperature of combustion is 1100 DEG C, fluorine fixing material adds than being top condition for 1wt%.
2, the fluorine fixing material solid best approach of fluorine and effectiveness comparison of different fluorine fixing material in fire coal
Get pine algal coal ore deposit, Chongqing height fluorine coal sample, 60 DEG C of oven dry, room temperature cools, and ground 300 mesh sieves, obtain coal dust; By gained coal dust, best fluorine fixing material, calcium carbonate magnesium salts, calcium carbonate are, after 100:1 Homogeneous phase mixing, put in High Temperature Furnaces Heating Apparatus, under temperature 1100 DEG C of conditions, carry out high-temp combustion in mass ratio with the present invention respectively.With reference to standard GB/T/T4633-1997, adopt high-temperature combustion hydrolytic-Fluoride ion selective electrode method to measure Oil repellent in raw coal respectively and after adding fluorine fixing material, calcium carbonate magnesium salts or calcium carbonate etc. quality coal-fired hot conditions under produce the amount of vapor-phase fluoride, and then calculate the curing degree of combustion PAHs in coal, compare the solid fluorine effect of the best fluorine fixing material of the present invention, calcium carbonate magnesium salts, calcium carbonate.The results are shown in Figure 6, under equal experiment condition, in raw coal, fluorine element evaporation rate is 55.8%, and namely fluorine rate is 44.2% admittedly; After adding the best fluorine fixing material of the present invention, calcium carbonate magnesium salts, calcium carbonate respectively, in raw coal, the curing degree of fluorine element is respectively 81%, 69.8% and 62.4%, and visible fluorine fixing material of the present invention is the most remarkable to the defluorination effect of high-temperature flue gas.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (6)
1. the preparation method of the fluorine fixing material administered for coal-fired fluoride pollution, is characterized in that, comprise the following steps: by Ca
2+, Al
3+, Na
+, K
+the mol ratio of ion is that 30:1.5:3:2-4.5 takes a certain amount of calcium acetate magnesium salt, Tai-Ace S 150, sodium carbonate and salt of wormwood respectively, Homogeneous phase mixing, ground 180-300 mesh sieve, add the water being equivalent to mixture weight 6-12 times amount again, 70-90 DEG C of heated and stirred 2-6 hour, last 100-120 DEG C drying, ground 180-300 mesh sieve, obtains fluorine fixing material.
2. preparation method as claimed in claim 1, is characterized in that, comprise the following steps: by Ca
2+, Al
3+, Na
+, K
+the mol ratio of ion is that 30:1.5:3:2 takes a certain amount of calcium acetate magnesium salt, Tai-Ace S 150, sodium carbonate and salt of wormwood respectively, Homogeneous phase mixing, ground 300 mesh sieves, add the water being equivalent to mixture weight 6-12 times amount again, 70-90 DEG C of heated and stirred 2-6 hour, last 100-120 DEG C drying, ground 300 mesh sieves, obtain fluorine fixing material.
3. preparation method as claimed in claim 2, is characterized in that, comprise the following steps: by Ca
2+, Al
3+, Na
+, K
+the mol ratio of ion is that 30:1.5:3:2 takes a certain amount of calcium acetate magnesium salt, Tai-Ace S 150, sodium carbonate and salt of wormwood respectively, Homogeneous phase mixing, ground 300 mesh sieves, add the water being equivalent to mixture weight 10 times amount again, 80 DEG C of heated and stirred 2 hours, last 120 DEG C of dryings, ground 300 mesh sieves, obtain fluorine fixing material.
4. adopt the fluorine fixing material that described in any one of claims 1 to 3, preparation method obtains.
5. application rights requires that described in 4, fluorine fixing material solidifies the method for fluorine in coal combustion process, it is characterized in that, comprise the following steps: raw coal is dry, ground 180-300 mesh sieve, gained coal dust and fluorine fixing material are, after 100:1-10 Homogeneous phase mixing, carry out high-temp combustion at 900-1200 DEG C in mass ratio.
6. method as claimed in claim 5, is characterized in that, comprise the following steps: raw coal is dry, and ground 300 mesh sieves, gained coal dust and fluorine fixing material are, after 100:1 Homogeneous phase mixing, carry out high-temp combustion at 1100 DEG C in mass ratio.
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| CN1570045A (en) * | 2003-07-24 | 2005-01-26 | 中国疾病预防控制中心环境与健康相关产品安全所 | Fluorine fixing shaped coal production method |
| CN103706326A (en) * | 2013-12-25 | 2014-04-09 | 中国科学院合肥物质科学研究院 | Preparation method of natural mineral-loaded nanometer fluorine removal agent |
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