CN101308047A - Method for monitoring oxygenized self-heating sulfide ore stack temperature - Google Patents
Method for monitoring oxygenized self-heating sulfide ore stack temperature Download PDFInfo
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- CN101308047A CN101308047A CNA200710034939XA CN200710034939A CN101308047A CN 101308047 A CN101308047 A CN 101308047A CN A200710034939X A CNA200710034939X A CN A200710034939XA CN 200710034939 A CN200710034939 A CN 200710034939A CN 101308047 A CN101308047 A CN 101308047A
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Abstract
The invention discloses a method for monitoring temperature of an oxidation spontaneous heating sulfide ore heap, which is characterized in that the method includes the following steps that: a non-contact temperature sensing device is applied to determine temperature of the ore heap; different temperature sensing distances and angles, different environment conditions, and fitting functions between different sulfide ore heap parameters and errors of the non-contact temperature sensing device can be obtained by a simulation test; the fitting functions are used to modify the reading errors of the temperature sensing device, thereby surface temperature of the sulfide ore heap on the spot is monitored to further predict spontaneous combustion risks of the sulfide ore heap. The method used to monitor the ore heap temperature has the advantages of high monitoring precision, rapid operation, convenience, safety and low cost.
Description
Technical field
The present invention relates to sulphide ore spontaneous combustion prediction field, relate in particular to the monitoring of sulphide ore temperature.
Background technology
When the sulphide ore clitter that pile up broken back contacts with air, can oxidation take place and emit heat, if the heat that oxidation generates is during greater than its heat that distributes towards periphery, the ore deposit heap can increase its temperature voluntarily, temperature raises and quickens its oxidation rate again, and under certain external condition, local heat can gather, continuous self-heating intensification is piled up to its ignition temperature in the ore deposit, thereby causes freely burning fire.Can find out that thus the temperature of monitoring ore deposit heap is the important channel that its spontaneous combustion of prediction is got angry.Yet the monitoring of ore deposit stack temperature depends on convenient and reliable temperature monitoring technology.Because on-the-spot ore deposit heap volume is big, shape is changeable, the big or small inequality of lumpiness, surrounding environment are not quite similar, the each point temperature variation is very big, and mining condition (particularly occurring under the situation of spontaneous combustion at the ore deposit heap) has often limited the application of contact temperature determination techniques, temperature monitoring instrument commonly used can not be suitable for requirement as mercury thermometer, semiconductor thermometer, land surface pyrometer etc.Therefore, seek new temperature detection instrument and have important and practical meanings with the new temperature monitoring technology of invention.
Summary of the invention
It is a kind of convenient, fast, reliable and be applicable to the new method that the noncontact of oxygenized self-heating sulfide ore stack temperature monitoring is measured that the object of the invention is to provide.
In order to achieve the above object, technical scheme of the present invention may further comprise the steps: (1) uses noncontact temperature-sensitive Instrument measuring ore deposit stack temperature; (2) by simulated experiment, obtain different temperature-sensitive distances, temperature-sensitive angle, varying environment condition, and the fitting function between the error of different sulfide ore stack parameter and noncontact temperature-sensitive instrument; (3) with the error of digital-to-analogue correction temperature-sensitive instrument readings, pile surperficial temperature thereby monitor on-the-spot ore deposit, and then the danger of prediction sulfide ore stack spontaneous combustion.
Advantage of the present invention is: (1) has solved because on-the-spot ore deposit heap volume is big, shape is changeable, the big or small inequality of lumpiness, surrounding environment are not quite similar, the each point temperature variation is very big, and mining condition (particularly occurring under the situation of spontaneous combustion at the ore deposit heap) has limited the shortcoming that the contact temperature determination techniques is used; (2) ore deposit stack temperature measuring accuracy height; (3) stack temperature monitoring results in ore deposit is fast, convenient and safe, cost is low; (4) the portable infrared thermometer of Raytek; low price; its volume is less, firm; can be contained in the pocket, only need aim at the ore deposit heap during use, need not contact; cocking; less than can on display screen, indicating reading a second, convert through the digital-to-analogue that the present invention set up, can obtain the temperature of on-the-spot ore deposit heap soon by computing machine.
Description of drawings
Fig. 1: the layout of rhombus nugget surface measuring point
Fig. 2: the layout of powdery and fritter ore deposit heap surface point
Fig. 3: set up infrared temperature-sensitive instrument readings and ore deposit and pile the experimental provision layout synoptic diagram that concerns between the surperficial actual temperature
Embodiment
Concrete experiment condition and method are as follows:
The main temperature measurer that uses has: 1) CENTER multiple spot contact temperature-measuring instrument, be used to measure the actual temperature on heap surface, ore deposit, and be characterized in that measuring accuracy height, speed are fast, can METHOD FOR CONTINUOUS DETERMINATION, measurement result can be made chart on computers by related software.2) the portable infrared thermometer of Raytek, its volume is less, firm, can be contained in the pocket, only need aim at the mark, and need not contact, and cocking is less than can read heat, surface temperature dangerous or that be difficult to contact object a second on display screen.Infrared thermometer partly is made up of optical system, photodetector, signal amplifier and signal Processing, demonstration output etc.; Optical system converges the target infrared energy in its visual field, and infrared energy focuses on the photodetector and changes corresponding electric signal into, and this signal changes the temperature value of measured target again into through conversion.
Environmental baseline in the experimentation: indoor temperature is 15.1 ℃-29.4 ℃; Relative humidity is 49%-94%; Measure at rainy day, fine day, cloudy day respectively.
Experiment material therefor: high sulfide pyrite (powdery), bulk sulphide ore, fritter sulphide ore.Each index of the sulfide ore stack of experimental design is as follows: powdery high sulfide pyrite heap volume: long 19.5cm, wide 17.5cm, high 9cm; The long and short axle of bulk diamond shaped sulfide ore is: 18cm and 8cm, thick about 4cm; The directly about 5cm of fritter sulfide ore stack piece.
Therefore heap general gathering heat that is difficult in a small amount of ore deposit heats as endogenous pyrogen 4 with rainbow board electric heating warmer (medium-sized) powdery high sulfide pyrite heap; And for bulk sulphide ore, fritter sulfide ore stack, because the DeGrain of endogenous pyrogen heating, then place environment to cool off again after being heated to 153 ℃, and carry out the measurement of surface temperature with S63-10 crucible electrical resistance furnace, Chinese crust (HANBA) formula high-temperature test chamber able to programme respectively.
Because sample ore is rough, approximately to get the several typical sampling point and measure, the layout of bulk rhombus nugget measurement point (5 point) is as shown in Figure 1; The measuring point (5 point) of powdery high sulfide pyrite heap and fritter taper ore deposit heap is arranged as shown in Figure 2; The laboratory is set up infrared temperature-sensitive instrument readings and ore deposit and is piled the experimental provision that concerns between the surperficial actual temperature and arrange synoptic diagram as shown in Figure 3.
Measure the identical point on sample ore surface simultaneously with portable infrared thermometer 1 of Raytek and CENTER multiple spot contact temperature-measuring instrument 2, wherein the temperature measured of touch sensor is an exact value.
Change temperature-sensitive distance, the temperature-sensitive angle of the portable infrared thermometer of Raytek, under varying environment condition (comprise environment temperature, humidity, environment temperature with the sulfide ore stack temperature difference etc.), different sulfide ore stack parameter (comprising mineral composition, lumpiness, humidity, volume etc.), repeat to carry out relevant mensuration.
According to above-mentioned three class sample ore own characteristics, with spacing 10cm～1m powdery high sulfide pyrite, bulk sulfuration nugget, fritter sulfide ore stack are measured respectively; With vertical surface and with the surface is angled bulk sulfuration nugget is measured respectively.Table 1 has been listed the surface temperature measurement result of one group of powdery high sulfide pyrite heap.
Table 1 powdery high sulfide pyrite is piled surperficial measuring point temperature value
With the powdery sulfide ore stack is example, and the relation of its measuring error and measuring distance is carried out match with the function polyfit among the MATLAB: y=-0.4549x
3+ 0.6938x
2-0.0591x+0.0002, wherein x is measuring distance (m), y is a measuring error.When satisfying condition: measuring distance is 0.1～1m, and taking measurement of an angle is 0～90 °, and environment temperature is 15.1～29.4 ℃, fine ore sulphide ore granularity is 40～300 orders, envionmental humidity is 49%～94%, and the sample ore temperature is 15.1～47.4 ℃, and its fitting effect is fine.
In using at the scene,,, and can calculate the ore deposit by the error match relation equation in the computing machine and pile surperficial true temperature its input computing machine according to the indication reading of infrared radiation detection apparatus, and then the danger of prediction sulfide ore stack spontaneous combustion.
Claims (1)
1. the method for a monitoring oxygenized self-heating sulfide ore stack temperature is characterized in that may further comprise the steps: (1) application noncontact temperature-sensitive Instrument measuring ore deposit stack temperature; (2) by simulated experiment, obtain different temperature-sensitive distances, temperature-sensitive angle, varying environment condition, and the fitting function between the error of different sulfide ore stack parameter and noncontact temperature-sensitive instrument; (3) with the error of fitting function correction temperature-sensitive instrument readings, pile surperficial temperature thereby monitor on-the-spot ore deposit, and then the danger of prediction sulfide ore stack spontaneous combustion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA200710034939XA CN101308047A (en) | 2007-05-18 | 2007-05-18 | Method for monitoring oxygenized self-heating sulfide ore stack temperature |
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| CNA200710034939XA CN101308047A (en) | 2007-05-18 | 2007-05-18 | Method for monitoring oxygenized self-heating sulfide ore stack temperature |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342690A (en) * | 2018-12-17 | 2019-02-15 | 福州大学 | Determine that sulphide ore induces the experimental rig of cook-off risk |
| CN111141412A (en) * | 2019-12-25 | 2020-05-12 | 深圳供电局有限公司 | Cable temperature and anti-theft dual-monitoring method and system and readable storage medium |
| CN111551259A (en) * | 2020-05-08 | 2020-08-18 | 电子科技大学 | Temperature measurement correction method based on cooperation of UWB and infrared sensor |
| CN111595999A (en) * | 2020-05-19 | 2020-08-28 | 中国安全生产科学研究院 | Method for identifying spontaneous combustion tendency of sulfide ore |
| CN113252105A (en) * | 2021-05-13 | 2021-08-13 | 中国安全生产科学研究院 | Method and system for detecting hidden danger of sulfide ore storage |
-
2007
- 2007-05-18 CN CNA200710034939XA patent/CN101308047A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342690A (en) * | 2018-12-17 | 2019-02-15 | 福州大学 | Determine that sulphide ore induces the experimental rig of cook-off risk |
| CN111141412A (en) * | 2019-12-25 | 2020-05-12 | 深圳供电局有限公司 | Cable temperature and anti-theft dual-monitoring method and system and readable storage medium |
| CN111551259A (en) * | 2020-05-08 | 2020-08-18 | 电子科技大学 | Temperature measurement correction method based on cooperation of UWB and infrared sensor |
| CN111595999A (en) * | 2020-05-19 | 2020-08-28 | 中国安全生产科学研究院 | Method for identifying spontaneous combustion tendency of sulfide ore |
| CN113252105A (en) * | 2021-05-13 | 2021-08-13 | 中国安全生产科学研究院 | Method and system for detecting hidden danger of sulfide ore storage |
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Open date: 20081119 |