CN103923721A - 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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- CN103923721A CN103923721A CN201410192992.2A CN201410192992A CN103923721A CN 103923721 A CN103923721 A CN 103923721A CN 201410192992 A CN201410192992 A CN 201410192992A CN 103923721 A CN103923721 A CN 103923721A
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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 of administering for coal-fired fluoride pollution, its preparation method, and the method for applying this fluorine fixing material solidify fluorine in coal combustion process.
Background technology
Fluorine is the higher trace element of content in coal, mostly at 20～500mg/kg, and the about 150mg/kg of mean value.In coal combustion process, along with the rising of temperature of combustion, the eduction rate of fluorine increases gradually, 280 DEG C time, starts to separate out, and when when 300 DEG C time, 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 atmosphere, not only heavy corrosion boiler and flue gas purifying equipment, and the destruction of causing air fluoride pollution and ecotope.
Coal burning pollution type fluorosis has become 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 the Greenhouse effect of World Focusing and global warming problem, ozone cavity problem, acid rain problem etc. above the Antarctic, all relevant with anthropogenic discharge's fluorochemical.For the coal-fired fluorine emission problem becoming increasingly conspicuous, the improvement of power station and Industrial Boiler, the coal-fired fluoride pollution of kiln has started starting.
At present, in high-temperature flue gas, in wash-out fluorine contaminant technology and coal combustion process, solidifying fluorine element technology is two mains direction of studying that solve coal-fired fluoride pollution problem.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; In coal combustion process, curing fluorine element technology refers to and in coal, mixes in advance fluorine fixing material or spray fluorine fixing material in combustion chamber, thereby in coal combustion process, fluorine is solidificated in cinder.
Summary of the invention
In view of this, one of object of the present invention is to provide a kind of fluorine fixing material of administering for coal-fired fluoride pollution, in coal combustion process, can efficiently solidify fluorine element; Two of object is to provide the preparation method of this fluorine fixing material, and cost of material is cheap, prepares easyly, and cost is low; Three of object is to provide this fluorine fixing material of a kind of application in coal combustion process, to 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 of administering 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 respectively a certain amount of calcium acetate magnesium salt CaMg
2(CH
3cOO
6), Tai-Ace S 150 Al
2(SO
4)
3, sodium carbonate Na
2cO
3with salt of wormwood K
2cO
3, evenly mix, ground 180-300 mesh sieve, then add and be equivalent to the water that mixture weight 6-12 doubly measures, 70-90 DEG C of heated and stirred 2-6 hour, last 100-120 DEG C dry, ground 180-300 mesh sieve, obtain 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 respectively a certain amount of calcium acetate magnesium salt, Tai-Ace S 150, sodium carbonate and salt of wormwood, evenly mix, ground 300 mesh sieves, add again and be equivalent to the water that mixture weight 6-12 doubly measures, 70-90 DEG C of heated and stirred 2-6 hour, last 100-120 DEG C is dried, and grinds 300 mesh sieves, obtains 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 respectively a certain amount of calcium acetate magnesium salt, Tai-Ace S 150, sodium carbonate and salt of wormwood, evenly mix, ground 300 mesh sieves, add again the water that is equivalent to 10 times of amounts of mixture weight, 80 DEG C of heated and stirred 2 hours, last 120 DEG C are dried, and grind 300 mesh sieves, obtain fluorine fixing material.
2. the fluorine fixing material that adopts described preparation method to make.
3. the described fluorine fixing material of application solidifies the method for fluorine in coal combustion process, comprises the following steps: raw coal is dry, ground 180-300 mesh sieve, and gained coal dust carries out high-temp combustion at 900-1200 DEG C after mixing for 100:1-10 is even in mass ratio with fluorine fixing material.
Preferably, described application fluorine fixing material in coal combustion process, solidify fluorine method, comprise the following steps: raw coal is dry, ground 300 mesh sieves, gained coal dust carries out high-temp combustion at 1100 DEG C after mixing for 100:1 is even in mass ratio with fluorine fixing material.
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 made a kind of fluorine fixing material of administering for coal-fired fluoride pollution.Wherein, the calcium in calcium acetate magnesium salt has obvious intervention capacity to the Transport And Transformation of fluorine; 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 is compared traditional coal-fired fluorine fixing material calcium carbonate, and porosity and specific surface area are greatly improved, and can in coal combustion process, efficiently solidify fluorine element, effectively reduces the fluorine content 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, and cost of material is cheap, and production cost is low; The method of applying this fluorine fixing material curing fluorine in coal combustion process is easy and simple to handle.Therefore, this fluorine fixing material has good application prospect in coal-fired fluoride pollution improvement field, economy and environment comprehensive remarkable benefit.
Brief description of the drawings
In order to make object of the present invention, technical scheme and beneficial effect clearer, the invention provides following accompanying drawing and describe:
Fig. 1 be the specific pore volume of fluorine fixing material of the present invention and traditional coal-fired fluorine fixing material calcium carbonate long-pending-pore diameter distribution comparison diagram.
Fig. 2 is 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, grind particle diameter, modulator kind and the impact of modulation ion mol ratio on the solid fluorine effect of fire coal
In high temperature coal process, calcium ion is absorption and the chemistry active sites of fluorine admittedly, and the curing of fluorine is by calcium substrate material, the effect of catching of fluorine to be realized.In order further to improve the efficiency of fixing fluorine, can utilize physico-chemical process to improve the porosity of calcium substrate material and the activity of specific surface area and raising calcium ion from the modification angle of additive.In order to improve calcium substrate material and coal-fired contact area, can be by the method for physical grinding, it is levigate.The present invention is according to early-stage Study result, and selecting calcium acetate magnesium salt is calcium substrate material, and sodium carbonate, salt of wormwood and Tai-Ace S 150 are modulator, grinds particle diameter, modulator kind and modulation ion mol ratio, to obtaining the curing optimal effectiveness of coal-fired fluorine by change.
Experiment adopts the orthogonal experiment of Three factors-levels non-interaction action, and each level of factor is in table 1.Press Ca
2+take respectively a certain amount of calcium acetate magnesium salt and modulator with the mol ratio of modulator metal ion, evenly mix, grinding is sieved, add again the water that is equivalent to 10 times of amounts of mixture weight, 80 DEG C of heated and stirred 2 hours, last 120 DEG C dry, grinding is sieved, and makes fluorine fixing material; Fluorine fixing material, by the adding than being added in coal sample of 1wt%, is carried out to combustion testing under 1100 DEG C of combustion conditionss.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 | Grind 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, be that 300 orders, modulator are that Tai-Ace S 150, modulation ion mol ratio can obtain best fluorine solidification effect in the situation that of being 10 grinding particle diameter, fluorin volatilization rate is minimum.As can be seen from Table 3, modulator kind is the most remarkable on the solidification effect impact of fluorine in fire coal, grinds particle diameter and takes second place, the affect minimum of modulation ion mol ratio on fluorine solidification effect.
2, the optimization of modulation ion mol ratio
Although aforementioned orthogonal test shows, with respect to grinding particle diameter and two factors of modulator kind, modulation ion mol ratio is minimum on the solidification effect impact of fluorine in coal-fired process, 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, in the situation that grinding particle diameter is identical with modulation ion mol ratio, modulator kind is followed successively by from big to small on the impact of solid fluorine effect in fire coal: Tai-Ace S 150 > salt of wormwood > sodium carbonate.Therefore, determine best Ca
2+, Al
3+, Na
+, K
+mol ratio, can first determine best Ca
2+with Al
3+mol ratio, then introduce on this basis Na
+and K
+, by adjusting Ca
2+with Na
+, K
+mol ratio and Na
+with K
+mol ratio, finally obtain best Ca
2+, Al
3+, Na
+, K
+mol ratio.
Press Ca shown in table 4
2+with Al
3+mol ratio take respectively a certain amount of calcium acetate magnesium salt and Tai-Ace S 150, evenly mix, ground 300 mesh sieves, then added the water that is equivalent to 10 times of amounts of mixture weight, 80 DEG C of heated and stirred 2 hours, last 120 DEG C dry, ground 300 mesh sieves, make fluorine fixing material; Fluorine fixing material, by the adding than being added in coal sample of 1wt%, is carried out to combustion testing under 1100 DEG C of combustion conditionss, calculate fluorin volatilization rate.The results are shown in Table 4.
Table 4Ca
2+with Al
3+the impact of mol ratio on 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, the measured fluorin volatilization rate difference of other 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, determine Ca
2+with Al
3+mol ratio be that 20:1 is 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 respectively a certain amount of calcium acetate magnesium salt, Tai-Ace S 150, sodium carbonate and salt of wormwood, evenly mix, ground 300 mesh sieves, add again the water that is equivalent to 10 times of amounts of mixture weight, 80 DEG C of heated and stirred 2 hours, last 120 DEG C dry, grind 300 mesh sieves, made fluorine fixing material; Fluorine fixing material, by the adding than being added in coal sample of 1wt%, is carried out to combustion testing under 1100 DEG C of combustion conditionss, calculate fluorin volatilization rate.The results are shown in Table 5.
Table 5Ca
2+with Na
+, K
+the impact of mol ratio on 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, work as Ca
2+, Al
3+, Na
+, K
+mol ratio while being 30:1.5:3:2, the solid fluorine effect of the fluorine fixing material of modulating is best.
3, the preparation of best fluorine fixing material and Micro-Structure Analysis thereof
Grind particle diameter (300 order) and Ca by aforementioned definite the best
2+, Al
3+, Na
+, K
+optimum mole ratio (30:1.5:3:2), take respectively a certain amount of calcium acetate magnesium salt CaMg
2(CH
3cOO
6), Tai-Ace S 150 Al
2(SO
4)
3, sodium carbonate Na
2cO
3with salt of wormwood K
2cO
3, evenly mix, ground 300 mesh sieves, then added the water that is equivalent to 10 times of amounts of mixture weight, 80 DEG C of heated and stirred 2 hours, last 120 DEG C dry, ground 300 mesh sieves, make best fluorine fixing material.
Reacting between calcium substrate material and vapor-phase fluoride belongs to heterogeneous gas-solid reaction, before there is chemosetting, must first pass through physical adsorption process.Only make the abundant adsorptive gaseous fluorochemical of fluorine fixing material, the vapor-phase fluoride producing in coal-fired process could finally effectively be solidified and, and stably stays in coal ash under hot conditions.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, and physical adsorbability is good, can make gaseous pollutant fully 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 the above-mentioned best fluorine fixing material making, and contrasts with traditional coal-fired fluorine fixing material calcium carbonate simultaneously.The results are shown in Figure 1 and Fig. 2, the long-pending peak value of specific pore volume of calcium carbonate concentrates on the aperture place of 3.5 μ m left and right, and maximum value is 158.7 × 10
3cm
3(g μ m)
-1, hole count is distributed as 0.2～4.5 μ m; The long-pending peak value of specific pore volume of fluorine fixing material of the present invention concentrates on the aperture place of 2 μ m left and right, and maximum value is 367.2 × 10
3cm
3(g μ m)
-1, hole count is distributed as 0.03～1 μ m.Can find from these data, the long-pending and hole count of the specific pore volume of fluorine fixing material of the present invention is with respect to the peak value of pore diameter distribution with respect to the calcium carbonate phenomenon that all oriented left avertence is moved, and the distribution density within the scope of hole diameter increases.In addition, the porosity of fluorine fixing material of the present invention calcium carbonate compared with specific surface area has increased respectively 1.42 times and 1.23 times.
Fig. 3 is the electron-microscope scanning figure of the above-mentioned best fluorine fixing material making.Can be found by figure, Tai-Ace S 150, sodium carbonate and salt of wormwood are embedded between organic calcium particle, and there is certain chemical reaction, the microcosmic district surface irregularity of fluorine fixing material, space prosperity, large aperture association, is greatly improved porosity and the specific surface area of calcium substrate material (calcium acetate magnesium salt).
Two, the method for fluorine fixing material of the present invention solid fluorine in fire coal
1, fluorine fixing material adds than the impact of with temperature of combustion, fire coal being consolidated fluorine effect
Temperature of combustion is a very important factor of the coal-fired heavy metal migration of impact.And in ensureing solid fluorine effect, determine that the fluorine fixing material minimum under equal conditions adds ratio, 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 4 groups of coal samples of totally 16 parts of each 1.0g, by the aforementioned best fluorine fixing material making adding than being added in each group of coal sample by 1wt%, 3wt%, 5wt% and 10wt% respectively, after evenly 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 adds than the impact of with temperature of combustion, fire coal being consolidated fluorine effect
As shown in Table 6, when fluorine fixing material adds 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 constant condition of temperature of combustion, along with fluorine fixing material add than increase, coal-fired fluorin volatilization rate reduces.As shown in Figure 5, under fluorine fixing material adds than constant condition, temperature of combustion is concave to the influence curve of coal-fired fluorin volatilization rate, and obtains minimum value in the time of 1100 DEG C.Because temperature of combustion is 1100 DEG C, fluorine fixing material adds when being increased to 10wt% by 1wt%, the variation of fluorin volatilization rate only 1%, therefore, consider engineering involved in the application of coal-fired fluorine retention later stage and drop into and fund input, determine that temperature of combustion is that 1100 DEG C, fluorine fixing material add than being top condition for 1wt%.
2, the fluorine fixing material solid best approach of fluorine and effect comparison of different fluorine fixing materials in fire coal
Get the high fluorine coal sample in pine algal coal ore deposit, Chongqing, 60 DEG C of oven dry, room temperature is cooling, grinds 300 mesh sieves, obtains coal dust; After gained coal dust is mixed for 100:1 is even in mass ratio with the best fluorine fixing material of the present invention, calcium carbonate magnesium salts, calcium carbonate respectively, put in High Temperature Furnaces Heating Apparatus, under 1100 DEG C of conditions of temperature, carry out high-temp combustion.With reference to standard GB/T/T4633-1997, adopt high-temperature combustion hydrolytic-Fluoride ion selective electrode method to measure respectively fluorine content in raw coal and the amount that produces vapor-phase fluoride under the coal-fired hot conditions of quality such as add after fluorine fixing material, calcium carbonate magnesium salts or calcium carbonate, and then the curing degree of fluorine in calculating fire coal, the relatively 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 fluorine rate is 44.2% admittedly; Add respectively after the best fluorine fixing material of the present invention, calcium carbonate magnesium salts, calcium carbonate the curing degree of fluorine element in raw coal and be respectively 81%, 69.8% and 62.4%, visible fluorine fixing material of the present invention is the most remarkable to the defluorination effect of high-temperature flue gas.
Finally explanation is, above preferred embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can make various changes to it in the form and details, and not depart from the claims in the present invention book limited range.
Claims (6)
1. the preparation method of the fluorine fixing material of administering for coal-fired fluoride pollution, is characterized in that, 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 respectively a certain amount of calcium acetate magnesium salt, Tai-Ace S 150, sodium carbonate and salt of wormwood, evenly mix, ground 180-300 mesh sieve, add again and be equivalent to the water that mixture weight 6-12 doubly measures, 70-90 DEG C of heated and stirred 2-6 hour, last 100-120 DEG C is dried, and grinds 180-300 mesh sieve, obtains fluorine fixing material.
2. preparation method as claimed in claim 1, is characterized in that, comprises the following steps: by Ca
2+, Al
3+, Na
+, K
+the mol ratio of ion is that 30:1.5:3:2 takes respectively a certain amount of calcium acetate magnesium salt, Tai-Ace S 150, sodium carbonate and salt of wormwood, evenly mix, ground 300 mesh sieves, add again and be equivalent to the water that mixture weight 6-12 doubly measures, 70-90 DEG C of heated and stirred 2-6 hour, last 100-120 DEG C is dried, and grinds 300 mesh sieves, obtains fluorine fixing material.
3. preparation method as claimed in claim 2, is characterized in that, comprises the following steps: by Ca
2+, Al
3+, Na
+, K
+the mol ratio of ion is that 30:1.5:3:2 takes respectively a certain amount of calcium acetate magnesium salt, Tai-Ace S 150, sodium carbonate and salt of wormwood, evenly mix, ground 300 mesh sieves, add again the water that is equivalent to 10 times of amounts of mixture weight, 80 DEG C of heated and stirred 2 hours, last 120 DEG C are dried, and grind 300 mesh sieves, obtain fluorine fixing material.
4. the fluorine fixing material that described in employing claims 1 to 3 any one, preparation method makes.
5. application rights requires the method that described in 4, fluorine fixing material solidifies 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 carries out high-temp combustion at 900-1200 DEG C after mixing for 100:1-10 is even in mass ratio with fluorine fixing material.
6. method as claimed in claim 5, is characterized in that, comprises the following steps: raw coal is dry, ground 300 mesh sieves, and gained coal dust carries out high-temp combustion at 1100 DEG C after mixing for 100:1 is even in mass ratio with fluorine fixing material.
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| CN105567365A (en) * | 2014-10-09 | 2016-05-11 | 无锡荣博能源环保科技有限公司 | Modified coal and manufacturing method thereof |
| CN109609241A (en) * | 2018-12-25 | 2019-04-12 | 北京首创博桑环境科技股份有限公司 | A kind of fire coal cleaning additive and preparation method thereof |
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| CN103923721B (en) | 2015-07-15 |
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