CN1234822C - Fluorine capturing shaped coal fuel for stone coal and its production method - Google Patents
Fluorine capturing shaped coal fuel for stone coal and its production method Download PDFInfo
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Abstract
The present invention relates to a moulded coal fluorine-capturing fuel for stone coal and a preparation method thereof. The fluorine-capturing fuel comprises the following four components: stone coal powder, anthracite smalls, a fluorine-capturing additive and clay, wherein the fluorine-capturing additive is burned dolomite or burned limestone or lime. The cured fluorine-capturing additive is mixed with the anthracite smalls, the clay and the stone coal powder according to proportion and a grain diameter range, and right amount of water is added; the obtained solution is evenly stirred by manual work or a machine, and the moulded coal fluorine-capturing fuels, such as honeycomb briquette, coal balls, coal blocks, etc. are prepared. The moulded coal fluorine-capturing fuel of the present invention has a high fluorine-capturing rate, a high sulphur-capturing rate and a high dust-falling rate; the problem of indoor air pollution generated from a large amount of fluoride and sulfide which are discharged from the combustion of stone coal is solved, and the fuel has great environmental benefits and social benefits. The stone coal component of the present invention is widely used in fuel coal type poisoning areas in China; the fuel of the present invention has favorable formability and favorable practicability, and is suitable for town residents to use the stoves for civil use, such as a briquette stove or a honeycomb briquette stove, in fuel coal type fluorine poisoning areas; the fuel has the advantages of convenient use and low cost, and is easy to be popularized in fuel coal type fluorine poisoning areas.
Description
Technical field
The present invention relates to a kind of composite fuel and method for making thereof, relate in particular to a kind of composite fuel at the solid fluorine performance of having of bone coal and preparation method thereof.
Background technology
The flue gas that produces behind the high fluorine coal combustion is the main source of air fluoride pollution.Controlled by geologic horizon, the fluorine content range is at 100～300mg/kg in the general coal of the high fluorine coal of China, and mean fluorine content is 200mg/kg.This value is far above world average 80mg/kg.Particularly at some Permian period coal measure strata and cold force, Silurian coal measure strata, coal is fluorine-containing even up to 1000-3000mg/kg.At present, China to also have the power plant of considerable part be fuel with high fluorine coal.Therefore, in coal mining and processing and utilization process, the fluorine in the coal is diffused in atmosphere, water body, the soil with the form of gaseous state, liquid state and residual form fluorine, causes serious fluoride pollution.It not only pollutes living environment on every side, more has a strong impact on HUMAN HEALTH.
Owing to reasons such as sociometric techniques, fluorosis so far still serious harm China people's health, population is on the hazard more than 100,000,000.Wherein coal burning pollution type fluorosis lesion is China's distinctive lesion type, mainly is distributed in middle reaches, the Yangtze valley, and the grave illness district mainly is distributed in the southwest, and cloud, expensive, river, Chongqing, Shan 5 provinces and cities are most important things of coal burning pollution type fluorosis.According to statistics, coal burning pollution type fluorosis lesion village accounts for 73.12% of national fluorosis lesion village sum.According to Ministry of Health's statistics in 1999, national coal burning pollution type fluorosis lesion was distributed in 14 provinces of China northeast to southwest, 201 counties, and 35718 lesiones village, lesion population more than 4,000 ten thousand, ill population is up to 1,813 ten thousand people.Why coal burning pollution type fluorosis seriously exists in the many areas of China, mainly be since the resident for a long time with coal piling or spacious kitchen range mode burn high fluorine coal heating, cook or toast, cause the fluoride pollution of room air, grain and other foods.People take in by respiratory tract, digestive tube and surpass hygienic standard several times of fluorochemical, oxysulfides to hundreds of times, cause chronic fluorosis.Fluorosis person gently then suffers from dental fluorosis, and is heavy then suffer from skeletal fluorosis, even disability, can't take care of oneself, and seriously restricted The development in society and economy.
Prior art is in the major measure of taking aspect the prevention coal burning pollution type fluorosis, the one, by change stove change kitchen range coal smoke is discharged to outdoor, the 2nd, in fire coal, add fluorine fixing material.Fall fluorine certain effect is arranged though change kitchen range, also exist problems: at first, be that engineering is costly.The existing coal-burning fluorine patient 1,813 ten thousand of China, with a cooking stove, 100 yuan of meters of each cooking stove transformation expense then need be invested several hundred million units by average 3 people one family.And can be because of the loss overlapping investment.Secondly, be that engineering is consuming time lasting, in case can not adhere to, the state of an illness promptly can occur repeatedly even go up, living environment quality worsens again.The 3rd, also be the most basic a bit promptly change the kitchen range engineering and just high fluorine coal smoke is discharged to outdoorly, fail fundamentally to reduce the quantity discharged of coal fluorine.Studies confirm that the coal burning starting stage, fluorine is annoying in the coal more than 50% changes into various fluoro-gas, as hydrogen fluoride (HF), silicon tetrafluoride (SiF
4), silicofluoric acid (H
2SiF
4) and fluorine dust etc., during high-temp combustion, the coal fluorine is gaseous state, windage even up to 98%.To studies show that of the pollution situation of coal-burning power plant's fluorine, the fluorine content in wheat leaf, stem and the grain all with atmosphere in fluorine be remarkable positive correlation.This illustrates that also changing the kitchen range defluorination just shifts fluoride pollution, and defluorination is not thorough.Change kitchen range room air pollution is obviously reduced though change stove, still have resident's room air fluorine concentration of 50% still to surpass required standard, food and grain contamination are still more serious.This instruction book changes the purpose that kitchen range is difficult to reach fired pollution control type fluorosis by changing stove.
Developed countries to high fluorine coal take to seal the colliery, the withdraw from service measure prevents coal-fired fluoride pollution.So do not have fluorosis problem due to the high fluorine fire coal, the research of yet seldom being correlated with.But China is big coal country, and reducing objectionable impurities such as fluorine in the coal is that the great environmental health problem that solves is badly in need of in China to the harm of HUMAN HEALTH.In view of the cause of disease of coal-burning fluorosis and the high fluorine carrier that causes a disease relative with delivering path all more clearly, the secure threshold of coal fluorine is also definite substantially, therefore theoretically, stop using high fluorine coal, the burst size that the blocking-up fluorine enters human body or controls fluorine in the high fluorine coal is to being that it is popular for may command below the secure threshold.In order to block the passage that fluorine enters human body, mainly contain two approach at present: the one, coal washing though raw coal can reduce a part of fluorine content through washing, still have a large amount of fluorine can not remove through washing, and the raw coal washing workload is big, and expense is many.Another is solid fluorine, and the effect of fluorine fixing material is to intercept and capture the fluorine that discharges in the coal burning process, and generates stable fluorochemical with it and residue in the ash content, thereby reduces the quantity discharged of coal-fired fluorine, fundamentally solve the problem of indoor coal burning fluoride pollution.Economic, practical, fluorine fixing material can reduce the discharging of coal-fired fluorine effectively efficiently, it is easy to use, with low cost simultaneously, is convenient to promote, can save country and place and peasant's the more than one hundred million units of economical load, be the important measures that realize country's control in 2010 endemic fluorosis target.
The fluorine fixing material of having reported at present mainly contains lime (calcium oxide), Wingdale (lime carbonate) etc., but these fluorine fixing material effect instabilities, not thorough (the research ZhaoBing Cheng of coal-fired flue honeycomb scavenging agent defluorination effect of defluorination, Zhang Lei, Ying Bo, Cao Shouren, place of china is sick learns magazine nineteen ninety-five, the 1st phase.The research of coal high-temp combustion defluorination sweetening additive, Liu Jianzhong, Qi Qingjie, Zhou Junhu, Cao Xinyu, Yao Qiang, Cen Kefa, combustion science and technology,, the 4th phase in 2000).Though, the resultant CaF of report (model research of the solid fluorine response characteristic of CaO in the coal-fired process, Yang Linjun, Zhang Yunxiang, Shen Xianglin, chemistry of fuel journal,, the 2nd phase in 2002) calcium and fluorine is arranged
2More stable, can reach solid fluorine effect.But, along with the carrying out of reaction, CaF
2At calcium oxide surface progressive additive, and influenced by agglomerating, porosity reduces, and diffusional resistance constantly increases, and therefore the fluorine rate is not high admittedly.In addition, because its porosity of calcium oxide, the specific surface area difference fired under the differing temps, porosity, the solid fluorine weak effect of the calcium oxide that specific surface area is low, and unstable.
The patent of applicant Luo Kunli, Feng Fujian in 2002, Yu Jiangping, Wang Wuyi application " a kind of solid fluorine fuel and method for making thereof " provides a kind of novel solid fluorine fuel at the coal of high fluorine content with sapropelinite (bone coal), humic coal for different fluorine-containing characteristics.The solid fluorine fuel of this kind adopts first by natural dolomite fires the fluorine fixing material that forms, and has good stable solid fluorine effect, especially outstanding to the solid fluorine effect of fluorine-containing general higher various coals, and the utilization of the fluorine-containing coal of Industrial Boiler is had practical value.But above-mentioned patent system Preparation Method is fairly simple, and China's coal-burning fluorosis area coal is of a great variety, fluorine content and morphological differences are big, and the Civil energy-saving cooking stove type of furnace of using is widely different, Gu necessary moulding of fluorine fuel and inflammable good the burning, therefore there is limitation in above-mentioned patented technology aspect the use of Civil energy-saving cooking stove.
Summary of the invention
One of purpose of the present invention is to overcome prior art to have circumscribed shortcoming aspect the use of Civil energy-saving cooking stove, provide a kind of new section coal solid fluorine fuel, the solid fluorine fuel of moulded coal solid fluorine rate, air desulphurizing ratio and dust reduction rate height, be applicable to coal dust ball stove or honeycomb briquette stove class Civil energy-saving cooking stove that the geographic town dweller of coal-burning fluorosis uses, practical, and easy to use, cheap.
Two of purpose of the present invention is to provide moulded coal solid fluorine fuel preparation method.
The solid fluorine fuel of moulded coal comprises following component:
1. stone coal powder
2. pulverized anthracite
3. solid fluoride additive
4. clay
Wherein said solid fluoride additive is for firing dolomite or limestone (being lime), the weight ratio of stone coal powder, pulverized anthracite, solid fluoride additive, clay is 20-50: 10-60: 2-38: 2-38, be preferably 20-40: 30-50: 5-30: 5-30, more preferably 30: 45: 18: 7.
Wherein the particle diameter of fluoride additive is the 0.01-5 millimeter admittedly, is preferably the 0.01-1 millimeter; The particle diameter of stone coal powder and pulverized anthracite is the 0.01-3 millimeter, is preferably the 0.01-1 millimeter.
Solid fluoride additive dolomite of the present invention or limestone, its chemical ingredients is Ca-Mg (CO
3)
2Or CaCO
3, accounting for 70-80%, all the other are clay mineral.
The main purpose of pulverized anthracite is the fuel value that is used to improve solid fluorine fuel, because of stone coal powder with after solid fluoride additive, clay mix, fuel value is lower.
The main purpose of clay is formability and the cohesiveness that increases the solid fluorine fuel of moulded coal, prevents that moulded coal is broken in combustion processes, and the influence burning has certain solid fluorine effect simultaneously.
Moulded coal of the present invention fluorine fuel admittedly has good solid fluorine rate and desulphurizing ratio, calculates by burning back slag fluorine, Gu the fluorine rate reaches 85.7%, presses air fluorine, sulphur calculating, and fluoride removing rate reaches 53.4%, and desulphurizing ratio reaches 86%.
The solid fluorine fuel of moulded coal reduces the respond well of room air dust content, and the solid fluorine fuel of moulded coal has been compared significant difference with common bone coal fuel, and dust reduction rate reaches 47.3%.
The raw material sources of the solid fluorine fuel of moulded coal of the present invention are in China North China, west area, as Beijing western, Shaanxi, Shanxi, the Inner Mongol, Ningxia and other places.
The solid fluorine fuel of moulded coal of the present invention has outstanding effect, (1) solid fluorine rate, desulphurizing ratio and dust reduction rate height, basic emit the room air pollution problem that a large amount of fluorochemical, sulfide and indoor dust produces when solving high fluorite coal combustion, help realizing that the cleaning of various coal resources is innoxious, prevent coal-fired fluorosis, produce huge environment-social benefit; (2) because the adding of pulverized anthracite and clay makes that the solid fluorine combust molding of moulded coal of the present invention is good, inflammable good the burning, practicality is good, be applicable to coal dust ball stove or honeycomb briquette stove class Civil energy-saving cooking stove that the geographic town dweller of coal-burning fluorosis uses, easy to use, cost is low, is easy to promote in the coal-burning fluorosis area.
The solid fluorine fuel process of moulded coal is: natural dolomite or limestone are obtained firing dolomite or limestone 900-1000 ℃ of calcination, after will firing dolomite or the slaking of lime calcining rock, add after the suitable quantity of water manually or mechanical stirring is even according to above-mentioned various proportional ranges and various particle size range with stone coal powder, pulverized anthracite, clay, make moulded coals such as honeycomb briquette, coal briquette or coal cinder.Method of the present invention need not be used any specific installation device.
The present invention verifies with following condition:
The preparation of the solid fluorine fuel of honeycomb type: take by weighing stone coal powder 30%, pulverized anthracite 45%, white lime 18%, clay 7%, add suitable quantity of water, artificial or mechanical stirring is even, make honeycomb briquette.
The solid fluorine fuel combustion test of honeycomb type: select 16 families other, the solid fluorine honeycomb briquette with method for preparing is burnt at 8 families, 8 families burn unguyed fluorine agent honeycomb briquette.Measure air fluorine concentration in each auto-combustion room, calculate the air fluorine and reduce percentage.The result shows that the air fluorine has reduced by 53.4%.Get the cinder and each the tame unburnt honeycomb briquette that adds fluorine fixing material that burnt at each family simultaneously, measure fluorine content, calculate loss on ignition and solid fluorine rate, the result on average consolidates fluorine rate 85.7%.Record the air desulphurizing ratio simultaneously and reach 86%, dust reduction rate reaches 47.3%.
The solid fluorine fuel of moulded coal of the present invention has following outstanding feature: (1) solid fluorine main ingredient of the present invention is for firing dolomite or limestone, this class carbonatite all has exposure at the main coal field of China North China, northwest, therefore be convenient to gather materials on the spot, transportation cost is low, low price, raw materials cost is low.(2) the present invention has good solid fluorine, sulphur removal and dust removing effects.(3) adding of pulverized anthracite, clay and make the present invention not only have good solid fluorine, sulphur removal and dust removing effects in conjunction with the preparation method, and processability is good, be easy to burning, be applicable to coal dust ball stove or honeycomb briquette stove class Civil energy-saving cooking stove that the geographic town dweller of coal-burning fluorosis uses, easy to use, cost is low, and is practical, is easy to promote in the coal-burning fluorosis area.
Embodiment
From solid fluorine principle, the loss of fluorine starts from dehydroxylation in the coal, and it begins the loss temperature roughly at 500 ℃-600 ℃.CaF
2-CaO, CaF
2-CaO-Al
2O
3, CaF
2-CaO-SiO
2The decomposition temperature of architecture compound is at 1300 ℃-1400 ℃.Therefore, theoretically, the system decomposition temperature that calcium-magnesium base oxide and fluorine form is equally very high.Mineral composition proportioning and constitutional features based on dolomite, limestone, its porosity and specific surface area are bigger, easy-sintering is not a base-material with calcium-magnesium base carbonate, even treatedly still can form stable solid fluorine resultant remain among the ash content when coal-fired temperature is higher than the temperature of dehydroxylation.
The preparation method
Natural dolomite or limestone are obtained firing dolomite or limestone 900-1000 ℃ of calcination, after will firing dolomite or limestone slaking, add after the suitable quantity of water manually or mechanical stirring is even according to various proportional ranges and various particle size range with stone coal powder, pulverized anthracite, clay, make moulded coals such as honeycomb briquette, coal briquette or coal cinder.Measuring principle and method
According to fluorine in the solid fluorine fuel of amending method mensuration of standard GB/T4633-1997 of the People's Republic of China (PRC) " measuring method of fluorine in the coal " and the health industry standard WS/T88-1996 of the People's Republic of China (PRC) " the total fluorine measuring method of coal and soil combustion hydrolytic-ion selective electrode method " and the fluorine of the solid fluorine fuel of simulation bone coal stove temperature of combustion (1000 ℃) through burning and discharging.
Gu the measuring method of fluorine is in the fluorine fuel: Gu fluorine fuel is through pulverizing, take by weighing about 0.2-1.0g, in electric tube furnace under 1100 ℃, logical oxygen and water vapour burning 20min, the fluorine that discharges absorbs with sodium hydroxide solution, add 1-2 and drip phenolphthalein indicator, transfer PH extremely colourless, add buffered soln, ion selecting electrode determining by pink with nitric acid.
Gu the fluorine measuring method that fluorine fuel simulation bone coal pit furnace temperature of combustion (the bone coal furnace temperature is generally at 1000 ℃ ± 50 ℃ after measured) discharges is: Gu fluorine fuel is without pulverizing, take by weighing about 3-5g, in electric tube furnace, descend logical oxygen combustion 20min in 1000 ℃, the fluorine that discharges absorbs with sodium hydroxide solution, add 1-2 and drip phenolphthalein indicator, transfer PH extremely colourless with nitric acid, add buffered soln, ion selecting electrode determining by pink.Gu the fluorine rate is calculated as follows:
Perhaps fluorine fuel burning (calculating loss on ignition simultaneously) in man of peasant household stove admittedly, the slag after getting solid fluorine fuel then respectively and burning is surveyed fluorine content wherein, Gu the fluorine rate is calculated as follows:
The measuring method of room air fluorine: with reference to the mensuration of standard GB/T15434-1995 ambient air fluorochemical mass concentration, method is the filter membrane Fluoride ion selective electrode method, and sampling thief is a flow total suspended particles sampling thief in the Tianhong Intelligent Meter Factory, Wuhan TH-150 intelligence of producing.
Method for determining sulfur dioxide: use Interscan 4240 type digital portable direct-reading type flue gas analysers and measure, indoor concentration of SO 2 gas is that unit directly shows with ppm, each household METHOD FOR CONTINUOUS DETERMINATION three times is got its mean value as indoor concentration of SO 2 gas.
Dust determination method: use P-5L
2C type numeral dust instrument is measured, and indoor dust concentration is with mg/m
3For unit directly shows, each household METHOD FOR CONTINUOUS DETERMINATION three times is got its mean value as indoor dust concentration.
Embodiment 1
Take by weighing stone coal powder 30%, pulverized anthracite 45%, white lime 18%, clay 7%, add portion water, artificial or mechanical stirring is even, make honeycomb briquette.Select local the same terms pit furnace 24 families, wherein the solid fluorine honeycomb briquette of handling with aforesaid method is burnt at 8 families, the 8 families unguyed fluorine agent honeycomb briquette that burns, and untreated bone coal is burnt at 8 families.Gather coal that does not burn and burning back slag that 8 families bake fluorine honeycomb briquette man, measure each family fluorine content, calculating solid fluorine rate is 85.7% (seeing Table 1).Gather three groups of pit furnace space air fluorine content more respectively, bake the average 0.086mg/m in 8 families of fluorine fuel
3, burn the average 0.1835mg/m in 8 families of unguyed fluorine agent honeycomb briquette
3, burn 8 family average out to 0.324mg/m of untreated bone coal
3Add the solid fluorine fuel stack of fluorine fixing material and unguyed fluorine agent honeycomb briquette group and untreated bone coal group ratio, air fluorine content 53.4% and 73.6% (the seeing Table 2) that descended respectively.
Table 1 embodiment 1 measures coal and the solid fluorine result of slag fluorine
| The family | Add fluorine fixing material honeycomb briquette group fuel fluorine content (mg/kg) | Unguyed fluorine agent honeycomb briquette group waste fuel fluorine amount (mg/kg) | Gu fluorine rate (%) |
| 1 | 831.4 | 676.6 | 81.4 |
| 2 | 490.9 | 451.0 | 91.9 |
| 3 | 1052.1 | 901.4 | 85.7 |
| 4 | 998.2 | 706.3 | 70.8 |
| 5 | 1065.6 | 702 | 65.9 |
| 6 | 1060.1 | 869.5 | 82 |
| 7 | 1076.1 | 1012 | 94 |
| 8 | 523.7 | 595.6 | 113.7 |
| On average | 85.7 |
Table 2 embodiment 1 measures air fluorine and removing fluorine result
| The family | Add fluorine fixing material honeycomb briquette group gas fluorine (mg/m 3) | Unguyed fluorine agent honeycomb briquette group gas fluorine (mg/m 3) | Bone coal group gas fluorine (mg/m 3) |
| 1 | 0.130 | 0.313 | 0.235 |
| 2 | 0.080 | 0.137 | 0.176 |
| 3 | 0.040 | 0.289 | 0.032 |
| 4 | 0.032 | 0.178 | 0.808 |
| 5 | 0.099 | 0.094 | 0.194 |
| 6 | 0.063 | 0.067 | 0.308 |
| 7 | 0.089 | 0.138 | 0.213 |
| 8 | 0.151 | 0.252 | 0.626 |
| On average | 0.086 | 0.1835 | 0.324 |
| Fluoride removing rate (%) | 53.4 | 73.6 |
Admittedly fluorine fuel sulfur limitation effect is also fine, is respectively 86% and 85.6% with unguyed fluorine agent honeycomb briquette group and untreated bone coal group than air desulphurizing ratio, sees Table 3.
Effect is measured in table 3 embodiment 1 sulphur removal
| The family | Add fluorine fixing material honeycomb briquette group air sulphur content (mg/m 3) | Unguyed fluorine agent honeycomb briquette group air sulphur content (mg/m 3) | Bone coal group air sulphur content (mg/m 3) |
| 1 | 0.14 | 0.42 | 1.06 |
| 2 | 0.22 | 0.27 | 2.10 |
| 3 | 0.15 | 0.38 | 0.69 |
| 4 | 0.20 | 0.98 | 0.50 |
| 5 | 0.23 | 3.66 | 1.50 |
| 6 | 0.08 | 1.41 | 1.12 |
| 7 | 0.06 | 1.31 | 0.98 |
| 8 | 0.23 | 0.92 | 1.11 |
| On average | 0.16 | 1.17 | 1.13 |
| Desulphurizing ratio (%) | 86.0 | 85.6 |
The solid fluorine fuel of this moulded coal is compared with normal cellular coal group, and dust reduction rate reaches 47.3%, sees Table 4.
Table 4 embodiment 1 reduces room air dust effect table
| The family | Add fluorine fixing material honeycomb briquette group room air Dust Capacity (mg/m 3) | General honeycomb briquette group room air Dust Capacity (mg/m 3) |
| 1 | 0.260 | 0.107 |
| 2 | 0.100 | 0.093 |
| 3 | 0.227 | 0.153 |
| 4 | 0.140 | 0.160 |
| 5 | 0.360 | 2.493 |
| 6 | 0.073 | 1.287 |
| 7 | 0.640 | 0.147 |
| 8 | 0.680 | 0.267 |
| On average | 0.310±0.235 | 0.588±0.867 |
| Dust reduction rate (%) | 47.3 |
Embodiment 2-17
Press each set of dispense ratio of table 5, take by weighing and after slaking, fire dolomite or lime, mix by a certain percentage, stir, make lump coal with coal dust, clay, water after pulverizing.Get wherein part pulverizing, measure with fluorine measuring method in the above-mentioned solid fluorine fuel; Gu the solid fluorine rate of fluorine fuel is that laboratory simulation records.
The coal fluorine of table 5 embodiment 2-17, slag fluorine and solid fluorine rate
| Embodiment | Stone coal powder consumption (%) | Pulverized anthracite consumption (%) | Fluorine fixing material consumption (%) | The fluorine fixing material kind | Clay consumption (%) | Gu fluorine fuel fluorine content (mg/kg) | Fluor releasing quantity (mg/kg) | Gu fluorine rate (%) |
| 2 | 30 | 40 | 2 | No. 2 lime | 28 | 410.5 | 135.2 | 67.1 |
| 3 | 30 | 40 | 5 | No. 2 lime | 25 | 368.3 | 109.6 | 70.2 |
| 4 | 30 | 40 | 10 | No. 2 lime | 20 | 362.2 | 104.6 | 71.1 |
| 5 | 30 | 40 | 15 | No. 2 lime | 15 | 332.3 | 87.1 | 73.8 |
| 6 | 30 | 40 | 18 | No. 2 lime | 13 | 324.8 | 93.3 | 71.3 |
| 7 | 30 | 40 | 20 | No. 2 lime | 10 | 319.4 | 76.7 | 76 |
| 8 | 30 | 40 | 2 | No. 2 dolomites | 28 | 378 | 132.3 | 65 |
| 9 | 30 | 40 | 5 | No. 2 dolomites | 25 | 369 | 114.6 | 68.9 |
| 10 | 30 | 40 | 10 | No. 2 dolomites | 20 | 350 | 74.6 | 78.7 |
| 11 | 30 | 40 | 15 | No. 2 dolomites | 15 | 331 | 67.5 | 79.6 |
| 12 | 30 | 40 | 18 | No. 2 dolomites | 12 | 319.6 | 66.3 | 79.2 |
| 13 | 30 | 40 | 20 | No. 2 dolomites | 10 | 312 | 56.2 | 82 |
| 14 | 40 | 30 | 20 | 61 lime | 10 | 1600.2 | 221.8 | 86.1 |
| 15 | 40 | 30 | 20 | No. 8 dolomites | 10 | 1546.9 | 215.7 | 86.1 |
| 16 | 40 | 30 | 20 | 68 lime | 10 | 1424.8 | 335.8 | 76.4 |
| 17 | 40 | 30 | 20 | No. 14 dolomites | 10 | 1401 | 231.6 | 83.5 |
Claims (8)
1. a moulded coal is consolidated fluorine fuel, it is characterized in that the solid fluorine fuel of this moulded coal is composed of the following components:
(1) stone coal powder;
(2) pulverized anthracite;
(3) solid fluoride additive;
(4) clay;
Described stone coal powder and pulverized anthracite particle diameter are the 0.01-3 millimeter;
Described solid fluoride additive is for firing dolomite; The weight ratio of stone coal powder, pulverized anthracite, solid fluoride additive, clay is 20-50: 10-60: 2-38: 2-38.
2. the solid fluorine fuel of moulded coal according to claim 1 is characterized in that the weight ratio of stone coal powder, pulverized anthracite, solid fluoride additive, clay is 20-40: 30-50: 5-30: 5-30.
3. the solid fluorine fuel of moulded coal according to claim 2 is characterized in that the weight ratio of stone coal powder, pulverized anthracite, solid fluoride additive, clay is 30: 45: 18: 7.
4. the solid fluorine fuel of moulded coal according to claim 1 is characterized in that solid fluoride additive particle diameter is the 0.01-5 millimeter.
5. the solid fluorine fuel of moulded coal according to claim 4, it is characterized in that firing the dolomite particle diameter is the 0.01-1 millimeter, the particle diameter of stone coal powder and pulverized anthracite is the 0.01-1 millimeter.
6. according to the solid fluorine fuel of the described moulded coal of one of claim 1～5, it is characterized in that firing dolomite is that natural dolomite makes 900-1000 ℃ of following calcination.
7. according to the solid fluorine fuel preparation method of the described moulded coal of one of claim 1～5, it is characterized in that to fire the dolomite slaking, proportionally scope and particle size range are mixed with stone coal powder, pulverized anthracite, clay, add suitable quantity of water, artificial or mechanical stirring is even, make honeycomb briquette, coal briquette or coal cinder.
8. the solid fluorine fuel preparation method of moulded coal according to claim 7, it is characterized in that firing dolomite is that natural dolomite makes 900-1000 ℃ of following calcination.
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| CN107177390A (en) * | 2017-06-19 | 2017-09-19 | 中国科学院地理科学与资源研究所 | A kind of reduction bone coal uses area's fluorine, the moulded coal of arsenic pollution |
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