CN107764685A - The method that Accurate Determining can be carried out to ash content in coal - Google Patents
The method that Accurate Determining can be carried out to ash content in coal Download PDFInfo
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- CN107764685A CN107764685A CN201610673099.0A CN201610673099A CN107764685A CN 107764685 A CN107764685 A CN 107764685A CN 201610673099 A CN201610673099 A CN 201610673099A CN 107764685 A CN107764685 A CN 107764685A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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Abstract
The invention discloses a kind of method that Accurate Determining can be carried out to ash content in coal, from Muffle furnace as body of heater；It is rectangular porcelain cupel from profile；From drier, assay balance；The heat-resisting porcelain plate or asbestos board selected；With the cupel of pre-selection calcination to constant mass, 1 ± 0.1g of air-dried sample that granularity is below 0.2mm is weighed, equably shakeouts in cupel, its quality every square centimeter is no more than 0.15g；Cupel is sent into Muffle furnace, shut fire door and fire door is left 15mm gap, furnace temperature is slowly increased to about 500 DEG C within 30min time, and keeps 30min at this temperature, continues to be raised to 815 ± 10 DEG C, and calcination at this temperature, cupel is taken out from stove, is placed on heat-resisting porcelain plate or asbestos board, cools down 5min or so in atmosphere, move into drier after being cooled to room temperature, weigh；Inspectability calcination is carried out, is calculation basis with the quality after last time calcination.This method can detect coal and then rear caused ash content parameter, efficiency high exactly.
Description
Technical field
The present invention relates to a kind of method, more particularly, to a kind of method that Accurate Determining can be carried out to ash content in coal.
Background technology
Coal be archaeophyte be imbedded in underground experienced complexity biochemistry and physicochemical change gradually form
Solid combustible mineral.It is a kind of solid combustible organic rock, mainly by plant remains through biological chemistry action, again through ground after burying
Matter role transformation forms, and is commonly called as coal.Coal has been described as the gold of black, industrial grain, since it was 18th century by people
One of main energy sources that human world uses.Coal is the branches and leaves and rhizome of plant over millions upon millions of years, and accumulation on the ground forms
One layer of extremely thick black humus, because the variation of the earth's crust is constantly embedded to underground, for a long time and air exclusion, and in high temperature
Under high pressure, by factors such as the physicochemical changes of a series of complex, the flammable sedimentary rock of black of formation, here it is the shape of coal
Into process.The speed that the earth's crust declines is fast, and plant remains are accumulated thick, and the coal seam in this colliery is just thick, conversely, the speed that the earth's crust declines
Degree is slow, and plant remains are accumulated thin, and the coal seam in this colliery is with regard to thin.Again because the tectonic movement of the earth's crust makes original horizontal coal
Fold and fracture occur for layer, have some coal seams to bury deeper local to underground, and some arrives earth's surface by exclusion again, or even exposes ground
Face, be easier by it is found that.Also some coal seams compare relatively thin, and area is also little, so without extraction value,
The saying of renewal is not yet found in formation about coal so far.Under earth's surface normal temperature, normal pressure, by being deposited in the plant stagnated in water body
Thing remains are transformed into peat or sapropel through peat process or saprofication；After peat or sapropel are buried, due to basin
Substrate declines and is sink to underground deep, is transformed into lignite through diagenesis；Make when temperature and pressure gradually increases, then through rotten
With being transformed into bituminous coal to anthracite.Peat process refers to that higher plant remains are accumulated in marsh and changed through biochemical change
Into the process of peat.Saprofication refers to that unicellular lower eukaryote remains are transformed into the mistake of sapropel in marsh through biochemical change
Journey.It is increasingly withered due to oil within the quite a long time although the critical positions of coal are substituted by oil
Exhaust, cause its inevitable trend to be decayed, and coal is because reserves are huge, in addition the scientific and technical new skill such as rapid development, flo gasifying of coal
Art reaches its maturity, and is used widely, and coal will turn into one of irreplaceable energy in human being's production life.Coal
Ash is produced after burning, existing environmental requirement there are strict requirements to grey quantity, it is therefore desirable to detection ash content is carried out, and it is existing
Detection method efficiency it is low, error is big, causes coal not reach expected requirement in follow-up use.
The content of the invention
It is an object of the invention to overcome above-mentioned existing detection method efficiency low, error is big, causes coal subsequently using
When the problem of not reaching expected require, devise a kind of method that Accurate Determining can be carried out to ash content in coal, this method energy
It is enough to detect coal and then rear caused ash content parameter exactly, efficiency high, meet after detection after satisfactory coal burning
Environmental protection standard requirement, avoids causing environmental pollution, solves that existing detection method efficiency is low, and error is big, cause coal follow-up
Expected the problem of requiring is not reached during use.
The purpose of the present invention is achieved through the following technical solutions：The method that Accurate Determining can be carried out to ash content in coal,
Comprise the following steps：
（1）Equipment is chosen：From can keeping temperature be 815 ± 10 DEG C, burner hearth there are the upper bands of enough flat-temperature zones, stove rear wall
There are a diameter of 25~30mm chimney, bottom from thering is the aperture of a plug in thermocouple, fire door to have one at 20~30mm of burner hearth bottom
The Muffle furnace of a diameter of 20mm passage is as body of heater；It is rectangle from profile, the long 45mm in bottom surface, wide 22mm, high 14mm
Vessel as porcelain cupel；Dried from the drier of built-in discoloration silica gel or anhydrous calcium chloride, be 0.0001g's from sensibility reciprocal
Assay balance；The heat-resisting porcelain plate or asbestos board selected；
（2）Continuous mode：With the cupel of pre-selection calcination to constant mass, the air-dried sample 1 that granularity is below 0.2mm is weighed
± 0.1g, 0.0002g is accurate to, is equably shakeout in cupel, its quality every square centimeter is no more than 0.15g；By ash
Ware is sent into temperature no more than the gap in 100 DEG C of Muffle furnace, shut fire door and make fire door leave 15mm or so, no less than
Furnace temperature is slowly increased to about 500 DEG C in 30min time, and keeps 30min at this temperature, continues to be raised to 815 ± 10 DEG C, and
Calcination 1h at this temperature, cupel is taken out from stove, is placed on heat-resisting porcelain plate or asbestos board, cool down 5min or so in atmosphere,
Move into drier and be cooled to room temperature（About 20min）Afterwards, weigh；Carry out inspectability calcination, each 20min, until twice in succession
It is calculation basis with the quality after last time calcination untill the mass change of calcination is no more than 0.001g, ash content is less than 15%
When, it is not necessary to carry out inspectability calcination.
In summary, the beneficial effects of the invention are as follows：This method can detect coal and then rear caused ash exactly
Divide parameter, efficiency high, meet environmental protection standard requirement after detection after satisfactory coal burning, avoid causing environmental pollution, solve
Having determined, existing detection method efficiency is low, and error is big, causes coal not reach expected the problem of requiring in follow-up use.
Embodiment
With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to
This.
Embodiment：
The method that Accurate Determining can be carried out to ash content in coal, comprises the following steps：
（1）Equipment is chosen：From can keeping temperature be 815 ± 10 DEG C, burner hearth there are the upper bands of enough flat-temperature zones, stove rear wall
There are a diameter of 25~30mm chimney, bottom from thering is the aperture of a plug in thermocouple, fire door to have one at 20~30mm of burner hearth bottom
The Muffle furnace of a diameter of 20mm passage is as body of heater；It is rectangle from profile, the long 45mm in bottom surface, wide 22mm, high 14mm
Vessel as porcelain cupel；Dried from the drier of built-in discoloration silica gel or anhydrous calcium chloride, be 0.0001g's from sensibility reciprocal
Assay balance；The heat-resisting porcelain plate or asbestos board selected；
（2）Continuous mode：With the cupel of pre-selection calcination to constant mass, the air-dried sample 1 that granularity is below 0.2mm is weighed
± 0.1g, 0.0002g is accurate to, is equably shakeout in cupel, its quality every square centimeter is no more than 0.15g；By ash
Ware is sent into temperature no more than the gap in 100 DEG C of Muffle furnace, shut fire door and make fire door leave 15mm or so, no less than
Furnace temperature is slowly increased to about 500 DEG C in 30min time, and keeps 30min at this temperature, continues to be raised to 815 ± 10 DEG C, and
Calcination 1h at this temperature, cupel is taken out from stove, is placed on heat-resisting porcelain plate or asbestos board, cool down 5min or so in atmosphere,
Move into drier and be cooled to room temperature（About 20min）Afterwards, weigh；Carry out inspectability calcination, each 20min, until twice in succession
It is calculation basis with the quality after last time calcination untill the mass change of calcination is no more than 0.001g, ash content is less than 15%
When, it is not necessary to carry out inspectability calcination.
This method can detect coal and then rear caused ash content parameter exactly, efficiency high, be met the requirements after detection
Coal burning after meet environmental protection standard requirement, avoid causing environmental pollution, it is low to solve existing detection method efficiency, error
Greatly, coal is caused not reach expected the problem of requiring in follow-up use.
It is described above, be only presently preferred embodiments of the present invention, any formal limitation not done to the present invention, it is every according to
Any simply modification, the equivalent variations substantially made according to the technology of the present invention, method to above example, each fall within the present invention
Protection domain within.
Claims (1)
- The method that 1. Accurate Determining can be carried out to ash content in coal, it is characterised in that comprise the following steps：（1）Equipment is chosen：From can keeping temperature be 855 ± 10 DEG C, burner hearth there are the upper bands of enough flat-temperature zones, stove rear wall There are a diameter of 20~25mm chimney, bottom from thering is the aperture of a plug in thermocouple, fire door to have one at 20~25mm of burner hearth bottom The Muffle furnace of a diameter of 18mm passage is as body of heater；It is rectangle from profile, the long 35mm in bottom surface, wide 20mm, high 12mm Vessel as porcelain cupel；Dried from the drier of built-in discoloration silica gel or anhydrous calcium chloride, be 0.0001g's from sensibility reciprocal Assay balance；The heat-resisting porcelain plate or asbestos board selected；（2）Continuous mode：With the cupel of pre-selection calcination to constant mass, the air-dried sample 1 that granularity is below 0.2mm is weighed ± 0.1g, 0.0002g is accurate to, is equably shakeout in cupel, its quality every square centimeter is no more than 0.15g；By ash Ware is sent into temperature no more than the gap in 100 DEG C of Muffle furnace, shut fire door and make fire door leave 15mm or so, no less than Furnace temperature is slowly increased to about 500 DEG C in 30min time, and keeps 30min at this temperature, continues to be raised to 815 ± 10 DEG C, and Calcination 1h at this temperature, cupel is taken out from stove, is placed on heat-resisting porcelain plate or asbestos board, cool down 5min or so in atmosphere, Move into drier and be cooled to room temperature（About 20min）Afterwards, weigh；Carry out inspectability calcination, each 20min, until twice in succession It is calculation basis with the quality after last time calcination untill the mass change of calcination is no more than 0.001g, ash content is less than 15% When, it is not necessary to carry out inspectability calcination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610673099.0A CN107764685A (en) | 2016-08-16 | 2016-08-16 | The method that Accurate Determining can be carried out to ash content in coal |
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| CN201610673099.0A CN107764685A (en) | 2016-08-16 | 2016-08-16 | The method that Accurate Determining can be carried out to ash content in coal |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872004A (en) * | 2018-06-04 | 2018-11-23 | 中钢集团新型材料（浙江）有限公司 | A kind of measuring method for ultra-pure graphite ash content |
| CN108956364A (en) * | 2018-06-11 | 2018-12-07 | 鹰牌陶瓷实业（河源）有限公司 | A kind of detection method of the calorific value characteristic of raw material fire coal |
| CN110715875A (en) * | 2019-10-09 | 2020-01-21 | 鄂尔多斯职业学院 | Method for measuring ash content in coal |
| CN114414427A (en) * | 2021-12-30 | 2022-04-29 | 通标标准技术服务（天津）有限公司 | Coal ash content detection method |
-
2016
- 2016-08-16 CN CN201610673099.0A patent/CN107764685A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872004A (en) * | 2018-06-04 | 2018-11-23 | 中钢集团新型材料（浙江）有限公司 | A kind of measuring method for ultra-pure graphite ash content |
| CN108956364A (en) * | 2018-06-11 | 2018-12-07 | 鹰牌陶瓷实业（河源）有限公司 | A kind of detection method of the calorific value characteristic of raw material fire coal |
| CN110715875A (en) * | 2019-10-09 | 2020-01-21 | 鄂尔多斯职业学院 | Method for measuring ash content in coal |
| CN114414427A (en) * | 2021-12-30 | 2022-04-29 | 通标标准技术服务（天津）有限公司 | Coal ash content detection method |
| CN114414427B (en) * | 2021-12-30 | 2023-08-18 | 通标标准技术服务（天津）有限公司 | Coal ash content detection method |
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Application publication date: 20180306 |
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