CN104237293A - Activity field qualitative detection method for quick lime for sintering - Google Patents
Activity field qualitative detection method for quick lime for sintering Download PDFInfo
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- CN104237293A CN104237293A CN201410488251.9A CN201410488251A CN104237293A CN 104237293 A CN104237293 A CN 104237293A CN 201410488251 A CN201410488251 A CN 201410488251A CN 104237293 A CN104237293 A CN 104237293A
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- unslaked lime
- quick lime
- sintering
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Abstract
The invention discloses an activity field qualitative detection method for quick lime for sintering. The method utilizes a water reaction speed and a heat generation principle of the quick lime to carry out detection. Activity of the quick lime is represented with a temperature rising speed of the quick lime when the quick lime is in contact with water; a quick lime sample is sampled from the field; then the same volume of quick lime and living water are measured to be mixed and sufficiently perform the reaction; reaction time and a reaction temperature are recorded by a thermometer and a second chronograph; the recorded data is compared with activity of normal-quality quick lime, i.e. a reference value of the temperature rising speed of the quick lime when the quick lime is in contact with water, to judge whether the quick lime accords with the requirements. According to the invention, the activity of the quick lime is directly detected; detection accuracy is high; reliability is good; activity of the quick lime can be rapidly detected in the field so as to judge whether the quick lime accords with the requirements; the detection area is large; detection time is short; the detection method is simple and easy to operate, is low in cost, has high safety and enables the quick lime for sintering to take the greatest effects; sintering cost is reduced; normal operation of sintering is ensured.
Description
Technical field
The present invention relates to the field that inorganic material detects and material properties is analyzed, be specifically related to a kind of detection of the unslaked lime activity degree to sintering, particularly make on-the-spot detection method of directly unslaked lime being carried out to activity degree at sintering.
Background technology
Unslaked lime is a kind of basic industrial chemicals, is all widely used in industries such as Ferrous Metallurgy, paper-making industry, sugaring, calcium carbide industry, alkaline, agricultural, fishery, environmental protection.The unslaked lime used because of current sintering plant is all that groove tank car transports by car, is driven in sintering unslaked lime feed bin by unslaked lime as power by pressurized air.
Lime is the main flux of sintering, and the quality of lime quality often adopts " activity degree " to weigh, and activity degree embodies the reaction capacity of lime and other material, is one of important indicator of inspection lime quality.When sintering, the addition of lime and quality thereof can produce important impact to sinter quality, and one of lime is oxide CaO form, and one is CaCO
3form.In sintering process, the CaO of these two kinds of forms can improve the basicity of sintering deposit, play solvent action, and CaO can discharge a large amount of heats in digestion process, thus can improve sintering feed temperature, production practices show, can not only be intensified-sintered with addition of active lime stone, improve the seed output and quality of sintering, and limestone activity affects crystal habit and the calcium ferrite quantity of calcium ferrite in sintering deposit, the lime stone that activity degree is high is conducive to the formation of fine needle state and needle-like calcium ferrite.Therefore, how the activity degree of Accurate Determining active lime stone causes the growing interest of people.
Current large-type sinterer uses the amount of unslaked lime all chasing after year rising, Lime Quality because of existing industry is checked on and is adopted the method for sampling, all cannot inspect by random samples every platform machine, and the hysteresis quality having relative time long, causing sintering Lime Quality to fluctuate cannot Timeliness coverage, affects SINTERING PRODUCTION.Developing a kind of method that can overcome the measurement unslaked lime activity degree of above-mentioned shortcoming is the technical matters that the art staff needs solution badly.
Summary of the invention
Technical matters to be solved by this invention is, for the shortcoming that above prior art exists, the on-the-spot qualitative checking method of a kind of sintering unslaked lime activity degree is proposed, the water activity utilizing unslaked lime to meet the reaction velocity of water and the principle of generation heat and unslaked lime carrys out the activity degree of direct-detection unslaked lime, detection accuracy is high, the activity degree that good reliability energy field quick detection goes out unslaked lime judges whether this unslaked lime meets the requirements, detection faces is large, detection can not be omitted, detection time is short, can not fluctuate by Hysteresis Energy Timeliness coverage Lime Quality, and detect without any need for adding of reagent, detection method is simple, cost is low, security is high, sintering unslaked lime is made to play maximum effect, reduce the normal operation that sintering cost is guaranteed to sinter.
The technical scheme that the present invention solves above technical matters is:
The on-the-spot qualitative checking method of a kind of sintering unslaked lime activity degree, the method is that the principle utilizing unslaked lime to meet water reaction velocity and generation heat detects, and the heating-up time length that the activity degree of unslaked lime meets water with unslaked lime represents, concrete operation step is as follows:
(1) utilize sample spoon by three point each taking-up 400ml before, during and after unslaked lime sample is from electronic belt unslaked lime feed bin and fully stand-by after mixing;
(2) sample made by the unslaked lime sample utilizing graduated cylinder to measure in step (1) after mixing, then measures the Living Water of normal temperature, and the ratio of unslaked lime sample and Living Water volume controls at 1:1;
(3) Living Water first getting normal temperature is poured in plastic containers for subsequent use, and meanwhile, getting out range is that the thermometer of 200 DEG C and stopwatch are stand-by;
(4) unslaked lime sample is poured in irony reaction vessel, then pour the Living Water of normal temperature in step (3) into container made of iron that unslaked lime is housed, put into 200 DEG C of thermometers simultaneously and start manual time-keeping, and record data on stopwatch;
(5) the time length of water intensification is met for reference value with the activity degree of normal quality unslaked lime and unslaked lime, the data recorded in step (4) and reference value are contrasted, be not less than reference value for the satisfactory unslaked lime product of activity degree, do not conform to the unslaked lime product of symbol requirement lower than reference value for activity degree.
The technical scheme that the present invention limits further is:
In the on-the-spot qualitative checking method of aforementioned sintering unslaked lime activity degree, the volume taking unslaked lime sample in step (2) is 100ml.
In the on-the-spot qualitative checking method of aforementioned sintering unslaked lime activity degree, in step (5), normal quality unslaked lime activity degree reference value is reach more than 100 DEG C in 35s after water met by unslaked lime.
When the speed 35s of the chance water that normal quality unslaked lime is measured reaches more than 100 DEG C, with the Living Water of normal temperature, ensure the relative accuracy measured.
In the on-the-spot qualitative checking method of aforementioned sintering unslaked lime activity degree, when step (4) Living Water pours unslaked lime into, utilize artificial stirring 5 seconds, stirring rate is 60r/min, allows unslaked lime and Living Water fully react.
When Living Water and unslaked lime merge, the form adopting Living Water to pour unslaked lime into mixes, instead of pour unslaked lime into by Living Water, unslaked lime is avoided to account on chamber wall like this, cause measurement result inaccurate, also stir when reacting simultaneously, can fully react, ensure the accuracy detected, avoid the prolongation due to the time, reactant can build up, cover the surface of other quicklime particles, unslaked lime and water digestion reaction is hindered to continue to carry out fast, reduce heating rate, under agitation can the reaction product of continuous stripper surface, expose fresh unslaked lime surface, digestion themopositive reaction is carried out again with water, make all quicklime slakings complete, guarantee the correct of testing result.
In the on-the-spot qualitative checking method of aforementioned sintering unslaked lime activity degree, in step (4) with temperature take into account stopwatch record time, timing when pouring unslaked lime into from the Living Water of normal temperature, when the temperature reading observing 200 DEG C is to 100 DEG C, records the time used.
In the on-the-spot qualitative checking method of aforementioned sintering unslaked lime activity degree, being used for the volume of the irony reaction vessel filling unslaked lime in step (4) is 500ml-1000ml.
The invention has the beneficial effects as follows:
Unslaked lime is respectively materialsed to three points before, during and after on electronic belt under unslaked lime feed bin when detecting and is ensured the accuracy of testing result, there will not be deviation;
The present invention can detect anywhere or anytime at the scene, and detect wide, the quality problems of meeting Timeliness coverage unslaked lime are also resolved in time, avoid the method for the sampling observation adopted now, exist and omit and cannot find that the selective examination time is long delayed, cannot fluctuate by Timeliness coverage Lime Quality, cause sintering normally not carry out.
The present invention only adopts unslaked lime and water to react to carry out, do not need extra reagent, as phenolphthalein indicator etc., directly react by unslaked lime and water the activity degree that the principle of generating heat detects unslaked lime, reduce cost relative to other method, saved resource, operation is simple simultaneously, detection time is short, and detection speed is fast.
Embodiment
embodiment 1
The present embodiment provides a kind of sintering unslaked lime activity degree on-the-spot qualitative checking method, the method is that the principle utilizing unslaked lime to meet water reaction velocity and generation heat detects, the heating-up time length that the activity degree of unslaked lime meets water with unslaked lime represents, concrete operation step is as follows:
(1) utilize sample spoon by three point each taking-up 400ml before, during and after unslaked lime sample is from electronic belt unslaked lime feed bin and fully stand-by after mixing;
(2) the unslaked lime 100ml utilizing graduated cylinder to measure in step (1) after mixing makes sample, then measures the Living Water of 100ml 23-26 DEG C, and the ratio of unslaked lime sample and Living Water volume controls at 1:1;
(3) Living Water first getting 23-26 DEG C is poured in plastic containers for subsequent use, and meanwhile, getting out range is that the thermometer of 200 DEG C and stopwatch are stand-by;
(4) unslaked lime sample is poured in the irony reaction vessel that volume is 500ml, then the Living Water of middle 23-26 DEG C of step (3) is poured into container made of iron that unslaked lime is housed, utilize artificial stirring 5 seconds, stirring rate is 60r/min, the Living Water of unslaked lime and 23-26 DEG C is allowed fully to react, timing when pouring unslaked lime into from the Living Water of 23-26 DEG C, when the temperature reading observing 200 DEG C is to 100 DEG C, records the time used;
(5) meet in speed 35s that water heats up with the activity degree of normal quality unslaked lime and unslaked lime and reach more than 100 DEG C for reference value, the data recorded in step (4) and reference value are contrasted, be not less than reference value for the satisfactory unslaked lime product of activity degree, do not conform to the unslaked lime product of symbol requirement lower than reference value for activity degree.
embodiment 2
The present embodiment provides a kind of sintering unslaked lime activity degree on-the-spot qualitative checking method, the method is that the principle utilizing unslaked lime to meet water reaction velocity and generation heat detects, the programming rate that the activity degree of unslaked lime meets water with unslaked lime represents, concrete operation step is as follows:
(1) utilize sample spoon by three point each taking-up 400ml before, during and after unslaked lime sample is from electronic belt unslaked lime feed bin and fully stand-by after mixing;
(2) the unslaked lime 200ml utilizing graduated cylinder to measure in step (1) after mixing makes sample, then measures the Living Water of 23-26 DEG C of 200ml, and the ratio of unslaked lime sample and Living Water volume controls at 1:1;
(3) Living Water first getting 23-26 DEG C is poured in plastic containers for subsequent use, and meanwhile, getting out range is that the thermometer of 200 DEG C and stopwatch are stand-by;
(4) unslaked lime sample is poured in the irony reaction vessel that volume is 1000ml, then the Living Water of middle 23-26 DEG C of step (3) is poured into container made of iron that unslaked lime is housed, utilize artificial stirring 5 seconds, manual time-keeping: 60r/min, allows unslaked lime and Living Water fully react simultaneously.Timing when pouring unslaked lime into from Living Water, when the temperature reading observing 200 DEG C is to 100 DEG C, records the time used;
(5) meet in speed 35s that water heats up with the activity degree of normal quality unslaked lime and unslaked lime and reach more than 100 DEG C for reference value, the data recorded in step (4) and reference value are contrasted, be not less than reference value for the satisfactory unslaked lime product of activity degree, do not conform to the unslaked lime product of symbol requirement lower than reference value for activity degree.
embodiment 3
The present embodiment provides a kind of sintering unslaked lime activity degree on-the-spot qualitative checking method, the method is that the principle utilizing unslaked lime to meet water reaction velocity and generation heat detects, the programming rate that the activity degree of unslaked lime meets water with unslaked lime represents, concrete operation step is as follows:
(1) utilize sample spoon by three point each taking-up 400ml before, during and after unslaked lime sample is from electronic belt unslaked lime feed bin and fully stand-by after mixing;
(2) the unslaked lime 150ml utilizing graduated cylinder to measure in step (1) after mixing makes sample, then measures the Living Water of 150ml23-26 DEG C, and the ratio of unslaked lime sample and Living Water volume controls at 1:1;
(3) Living Water first getting 23-26 DEG C is poured in plastic containers for subsequent use, and meanwhile, getting out range is that the thermometer of 200 DEG C and stopwatch are stand-by;
(4) unslaked lime sample is poured in the irony reaction vessel that volume is 800ml, then the Living Water of middle 23-26 DEG C of step (3) is poured into container made of iron that unslaked lime is housed, utilize artificial stirring 5 seconds, stirring rate is 60r/min, allows unslaked lime and Living Water fully react simultaneously.Timing when pouring unslaked lime into from Living Water, when the temperature reading observing 200 DEG C is to 100 DEG C, records the time used;
(5) meet in speed 35s that water heats up with the activity degree of normal quality unslaked lime and unslaked lime and reach more than 100 DEG C for reference value, the data recorded in step (4) and reference value are contrasted, be not less than reference value for the satisfactory unslaked lime product of activity degree, do not conform to the unslaked lime product of symbol requirement lower than reference value for activity degree.
The activity degree using method of the present invention to detect sintering unslaked lime can detect the activity degree of unslaked lime at short notice fast by the detection unslaked lime chance reaction velocity of water and the heat of generation, thus judge that the quality of this unslaked lime is crossed and do not pass a test, ensure that sintering process is stablized with this; Simultaneously operation is simple directly can detect unslaked lime sintering is on-the-spot for method of the present invention, reduces cost, saved the time.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (6)
1. the on-the-spot qualitative checking method of sintering unslaked lime activity degree, it is characterized in that: the method is that the principle utilizing unslaked lime to meet water reaction velocity and generation heat detects, the heating-up time length that the activity degree of unslaked lime meets water with unslaked lime represents, concrete operation step is as follows:
(1) utilize sample spoon by three point each taking-up 400ml before, during and after unslaked lime sample is from electronic belt unslaked lime feed bin and fully stand-by after mixing;
(2) sample made by the unslaked lime sample utilizing graduated cylinder to measure in step (1) after mixing, then measures the Living Water of normal temperature, and the ratio of the Living Water volume of unslaked lime sample and normal temperature controls at 1:1;
(3) Living Water first getting normal temperature is poured in plastic containers for subsequent use, and meanwhile, getting out range is that the thermometer of 200 DEG C and stopwatch are stand-by;
(4) unslaked lime sample is poured in irony reaction vessel, then pour the Living Water of normal temperature in step (3) into container made of iron that unslaked lime is housed, put into 200 DEG C of thermometers simultaneously and start manual time-keeping, and record data on stopwatch;
(5) the time length of water intensification is met for reference value with the activity degree of normal quality unslaked lime and unslaked lime, the data recorded in step (4) and reference value are contrasted, be not less than reference value for the satisfactory unslaked lime product of activity degree, do not conform to the unslaked lime product of symbol requirement lower than reference value for activity degree.
2. the on-the-spot qualitative checking method of sintering unslaked lime activity degree according to claim 1, its feature is being, the volume taking unslaked lime sample in step (2) is 100ml.
3. the on-the-spot qualitative checking method of sintering unslaked lime activity degree according to claim 1, is characterized in that: in step (5), normal quality unslaked lime activity degree reference value is reach more than 100 DEG C in 35s after water met by unslaked lime.
4. the on-the-spot qualitative checking method of sintering unslaked lime activity degree according to claim 1, it is characterized in that: when the Living Water of step (4) normal temperature pours unslaked lime into, utilize artificial stirring 5 seconds, stirring rate is 60r/min, allows the Living Water of unslaked lime and normal temperature fully react.
5. the on-the-spot qualitative checking method of sintering unslaked lime activity degree according to claim 1, it is characterized in that: in step (4) with temperature take into account stopwatch record time, timing when pouring unslaked lime into from the Living Water of normal temperature, when the temperature reading observing 200 DEG C is to 100 DEG C, record the time used.
6. the on-the-spot qualitative checking method of sintering unslaked lime activity degree according to claim 1, is characterized in that: being used for the volume of the irony reaction vessel filling unslaked lime in step (4) is 500ml-1000ml.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105445324A (en) * | 2015-12-04 | 2016-03-30 | 浙江天石纳米科技有限公司 | Method for quickly determining chemical reaction activity of quick lime |
| CN105987927A (en) * | 2015-02-06 | 2016-10-05 | 宝山钢铁股份有限公司 | Method for detecting quicklime digestion proportion and application thereof |
| CN111077291A (en) * | 2019-12-30 | 2020-04-28 | 天津天钢联合特钢有限公司 | Quicklime powder digestion and impurity rapid analysis method |
| CN113979652A (en) * | 2021-10-25 | 2022-01-28 | 阳春新钢铁有限责任公司 | Device and method for rapidly judging quicklime activity in sintering site |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987927A (en) * | 2015-02-06 | 2016-10-05 | 宝山钢铁股份有限公司 | Method for detecting quicklime digestion proportion and application thereof |
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| CN111077291A (en) * | 2019-12-30 | 2020-04-28 | 天津天钢联合特钢有限公司 | Quicklime powder digestion and impurity rapid analysis method |
| CN113979652A (en) * | 2021-10-25 | 2022-01-28 | 阳春新钢铁有限责任公司 | Device and method for rapidly judging quicklime activity in sintering site |
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