CN103411792A - Method for detecting content of soluble salt in slag aggregate of waste incinerator - Google Patents
Method for detecting content of soluble salt in slag aggregate of waste incinerator Download PDFInfo
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- CN103411792A CN103411792A CN2013103223581A CN201310322358A CN103411792A CN 103411792 A CN103411792 A CN 103411792A CN 2013103223581 A CN2013103223581 A CN 2013103223581A CN 201310322358 A CN201310322358 A CN 201310322358A CN 103411792 A CN103411792 A CN 103411792A
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Abstract
The invention relates to the field of resource utilization of waste incinerator slag, in particular to a method for detecting the content of soluble salt in slag aggregate of a waste incinerator. The method comprises the following steps: (1) sampling: selecting a plurality of groups of uniformly distributed furnace slag with substantially the same mass at the top, in the middle and at the bottom of the furnace slag aggregate pile and uniformly mixing the selected furnace slag into a group of furnace slag aggregate; (2) preparing furnace slag leachate; drying, pulverizing in a mortar, mixing and oscillating furnace slag and distilled water at the mass ratio of 1:5 for 5-6 minutes to prepare slurry, and filtering; (3) titrating silver nitrate solution to determine the concentration of chloride(Cl<-1->) in the furnace slag leachate; (4) titrating barium chloride solution to determine the concentration of sulfate radical (SO4<2->); (5) utilizing the electric conductivity tested by a conductometer to determine the total amount of soluble salt in the furnace slag leachate. The method provided by the invention can accurately test the content of soluble salt in the slag aggregate of a waste incinerator, is simple, feasible, quick and accurate, is short in the test period, and can achieve batch detection of furnace slag aggregate to provide reference for resource utilization of furnace slag aggregate.
Description
Technical field
The present invention relates to the recycling field of waste incineration slag, be specifically related to the detection method of soluble salt content in a kind of incinerator slag aggregate.
Background technology
Waste incineration slag belongs to general solid waste, because there are similar part in its physico mechanical characteristic and natural stone, and can be using it as regenerated aggregate for the recycling of road engineering material.Yet slag gathers materials and exists again greatest differences with natural stone, this is mainly reflected in: the resolvability that slag gathers materials is much larger than natural stone, this is mainly that test shows that soluble salt content is at 1-2% because the Water-soluble salt content (specifically referring to chlorine root, sulfate radical, hydroxyl, carbonate and bicarbonate radical etc.) of slag in gathering materials is higher.Existing research shows, too high soluble salt content, the physical and mechanical property that causes slag to gather materials on the one hand is unstable under the water effect, on the other hand too high soluble salt, especially villaumite and sulfate, impact intensity and the permanance of cement based civil engineering material.Simultaneously, the complicacy of slag physical composition causes the variation of its soluble salt content larger.Therefore should be using soluble salt content as the conventional sense that slag is gathered materials, thus safely and effectively slag is applied to road engineering material.
Waste incineration slag is as a kind of solid waste, the method of inspection complexity of its chemical composition, and need expensive testing equipment, as " hazardous waste judging standard leaching characteristic identification " (GB 5085.3), the check of chlorine root, sulfate radical is adopted to the equipment such as ion chromatograph, and the test method complexity.And road engineering only needs slag whether available the judging and Real-Time Monitoring of gathering materials, this just require the method for inspection as far as possible simple, cost is low, can repeat, and guarantees to have again simultaneously high accurancy and precision.The test method of middle soluble salt content and current road industry standard " highway engineering gather materials testing regulations " (JTG E42) does not propose to gather materials.
Summary of the invention
Purpose of the present invention is exactly in order to solve above-mentioned problems of the prior art, the detection method that provides a kind of convenience, practical slag to gather materials middle soluble salt content, comprise sampling method, slag that slag gathers materials the gather materials preparation method of leachate and the detection method of soluble salt content (chlorine root, sulfate radical and total salt quantity), measure accurately and fast the soluble salt content of slag in gathering materials, thereby determine slag gathers materials whether meet request for utilization.
The method of the detection incinerator slag aggregate soluble salt content that the present invention proposes, concrete steps are as follows:
(1) sampling: slag gather materials top, middle part and the bottom of heap choose be uniformly distributed, quality many groups slag about equally, evenly mix and form one group of slag and gather materials;
(2) the slag preparation of leachate of gathering materials: the slag that step (1) the is obtained oven dry of gathering materials, mortar grinds, and products therefrom mixes with the 1:5 mass ratio 5-6 minute that vibrates with distilled water, makes Shanghai slag suspension, and filtration, make the slag leachate; Preserve: the slag leachate is stored in the vial of band plug, room temperature, keeps in Dark Place;
(3) Cl
-Content detection: get 250 milliliters of the slag leachates that step (2) obtains, add wherein 0.02mol/L sodium bicarbonate to the solution of 0.15 milliliter-0.20 milliliter just to become yellow, add the 50g/L potassium chromate indicator of 0.25-0.30 milliliter; Add the 0.04mol/L silver nitrate, with dripping with shaking, until the brick-red precipitation generated no longer disappears; By the amount of consumption silver nitrate standard solution, try to achieve chloride content in the slag leachate;
(4) SO
4 2-Content detection: with the barium chloride solution titration slag leachate of 5% concentration, generate barium sulfate precipitate, filter, clean, dry, calcination, claim its quality, calculates sulfate radical content in leachate;
(5) conductivity detects: use the conductivity meter testing conductivity.
In the present invention, described in step (2) and step (4), bake out temperature is 100-110 ℃, and drying time is 7.5-8.5 hour.
In the present invention, calcination described in step (4) is calcination 12-18 minute in 790-810 ℃ of high-temperature electric resistance furnace, takes out cooling approximately 30 minutes, and weighing, repeat calcination, and weighing, till being no more than 0.0005 gram to the difference of two inferior qualities.
In the present invention, the described conductivity meter range of step (5) is not less than 10mS/cm, precision 0.001 mS/cm.
Advantage of the present invention and beneficial effect: 1. the present invention can carry out in time the slag leachate that gathers materials and extracts and detect after the road construction on-site sampling, reaches the effect of Real-Time Monitoring, can accurately reflect the character that slag gathers materials; 2. by mortar, grind slag and gather materials, can be farthest solvend be wherein extracted by leaching, can reflect engineering property impact and influence degree that slag gathers materials maximum; 3. when each index of the present invention detected, required leachate sample size was less, and repeatability is strong, and test findings is accurate; 4. testing equipment required for the present invention is simple, all easily buy, and easy and simple to handle.
Embodiment
Below by example, the present invention is described in further details.
Embodiment 1: the sampling method that slag gathers materials: slag gather materials top, middle part and the bottom of heap choose be uniformly distributed, quality many groups slag about equally, evenly mix and form one group of sample.The gather materials preparation of leachate of slag: dried 8 hours in 105 ℃ of baking ovens, mortar grinds, and the different-grain diameter slag gathers materials to mix to vibrate with mass ratio 1:5 with distilled water and made many group suspensions in 5 minutes, filters and makes the slag leachate, be stored in the vial of band plug, room temperature, keep in Dark Place.
Cl-content detection: get respectively 100mL slag leachate, and dropwise add wherein respectively 0.02mol/L sodium bicarbonate to the solution of 0.15mL just to become yellow, add the 50g/L potassium chromate indicator of 0.25mL; Add the 0.04mol/L silver nitrate, with dripping with shaking, until the brick-red precipitation generated no longer disappears; By the amount of consumption silver nitrate standard solution, try to achieve chloride content in leachate.
SO
4 2-Content detection: with the barium chloride solution titration slag leachate of 5% concentration, generate barium sulfate precipitate (BaSO
4), filter.Clean, dry, calcination, claim its quality, calculates sulfate radical content in leachate.
Conductivity detects: use the conductivity meter testing conductivity.
The present embodiment prepares infusion solution to the incinerator slag aggregate of different pilling up time, and detects.Testing result is in Table 1.Chloride content in slag, with obvious change occurs standing time, does not maintain 8g/kg substantially; Sulphates content in slag is with increasing standing time; The conductivity of leachate is with being increase trend standing time.The measurement result of this and ion chromatograph is approximate, and consistent with other document conclusions, thereby has verified the accuracy of the inventive method.
The indices testing result of table 1 different standing time of slag leachate
| Slag standing time (my god) | Cl -Concentration (g/kg) | SO 4 2-Concentration (g/kg) | Conductivity (mS/cm) |
| 1 | 9.0 | 1.3 | 7.0 |
| 7 | 8.2 | - | 6.9 |
| 28 | 7.0 | - | 7.1 |
| 90 | 6.8 | 3 | 9.4 |
| 150 | 8.2 | 3.1 | 10.3 |
Embodiment 2
For further verifying validity of the present invention, the present embodiment detects the slag leachate of different-grain diameter, the results are shown in Table 2.The slag particle diameter is less, and villaumite, sulfate concentration are higher, and conductivity is higher, illustrates that in fine grain, soluble salt content is higher.Visible, detection method of the present invention can be distinguished the soluble salt content in the different-grain diameter slag effectively.
The indices testing result of table 2 different-grain diameter slag leachate
Claims (4)
1. the detection method of soluble salt content in the incinerator slag aggregate is characterized in that concrete steps are as follows:
(1) sampling: slag gather materials top, middle part and the bottom of heap choose be uniformly distributed, quality many groups slag about equally, evenly mix and form one group of slag and gather materials;
(2) the slag preparation of leachate of gathering materials: the slag that step (1) the is obtained oven dry of gathering materials, mortar grinds, and products therefrom mixes with mass ratio 1:5 the 5-6 minute that vibrates with distilled water, makes Shanghai slag suspension, and filtration, make the slag leachate; Preserve: the slag leachate is stored in the vial of band plug, room temperature, keeps in Dark Place;
(3) Cl
-Content detection: get the slag leachate 100-150 milliliter that step (2) obtains, add wherein 0.02mol/L sodium bicarbonate to the solution of 0.15 milliliter-0.20 milliliter just to become yellow, add the 50g/L potassium chromate indicator of 0.25-0.30 milliliter; Add the 0.04mol/L silver nitrate, with dripping with shaking, until the brick-red precipitation generated no longer disappears; By the amount of consumption silver nitrate standard solution, try to achieve chloride content in the slag leachate;
(4) SO
4 2-Content detection: with the barium chloride solution titration slag leachate of 5% concentration, generate barium sulfate precipitate, filter, clean, dry, calcination, claim its quality, calculates sulfate radical content in leachate;
(5) conductivity detects: use the conductivity meter testing conductivity.
2. method according to claim 1, is characterized in that described in step (2) and step (4), bake out temperature is 100-110 ℃, and drying time is 7.5-8.5 hour.
3. method according to claim 1, is characterized in that calcination described in step (4) is calcination 12-18 minute in 790-810 ℃ of high-temperature electric resistance furnace, took out cooling approximately 30 minutes, and weighing, repeat calcination, till to the difference of two inferior qualities, being no more than 0.0005 gram.
4. method according to claim 1, is characterized in that the described conductivity meter range of step (5) is not less than 10mS/cm, precision 0.001 mS/cm.
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Cited By (11)
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| CN104122302A (en) * | 2014-08-15 | 2014-10-29 | 武汉科技大学 | Method for evaluating hydration resistance of basic refractory |
| CN104251877A (en) * | 2013-12-18 | 2014-12-31 | 天津大学 | Detection method for chlorine content of urban domestic garbage |
| CN106018672A (en) * | 2016-07-20 | 2016-10-12 | 山西焦化股份有限公司 | Method for determining chlorine ion content in coke |
| CN106501122A (en) * | 2016-11-10 | 2017-03-15 | 北京市环境保护监测中心 | The automatic measurement system of total dissolved solid content and method |
| CN107202865A (en) * | 2017-05-12 | 2017-09-26 | 上海大学 | Heavy metal stabilizing and the quick determination method of toxicity in domestic garbage incineration flyash |
| CN107764869A (en) * | 2016-08-23 | 2018-03-06 | 中国科学院上海硅酸盐研究所 | The cannot-harm-detection device of the solvable salt content of Movable Cultural Relics |
| CN108088874A (en) * | 2017-12-12 | 2018-05-29 | 西南石油大学 | A kind of leaching method of black shale soluble salt |
| CN109443978A (en) * | 2018-11-16 | 2019-03-08 | 沈阳环境科学研究院 | A kind of boiler slag phosphorus content on-line monitoring system |
| CN109932275A (en) * | 2019-04-17 | 2019-06-25 | 成都虹波钼业有限责任公司 | The detection method of sulfate radical content in a kind of molybdenum base solution |
| CN108508064B (en) * | 2018-03-22 | 2020-08-14 | 中国科学院上海硅酸盐研究所 | Detection equipment for content of soluble salt on surface of cultural relic |
| CN112129614A (en) * | 2020-08-31 | 2020-12-25 | 浙江工业大学 | Environmental impact evaluation method for road backfill by using renewable solid waste material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104251877A (en) * | 2013-12-18 | 2014-12-31 | 天津大学 | Detection method for chlorine content of urban domestic garbage |
| CN104122302A (en) * | 2014-08-15 | 2014-10-29 | 武汉科技大学 | Method for evaluating hydration resistance of basic refractory |
| CN106018672A (en) * | 2016-07-20 | 2016-10-12 | 山西焦化股份有限公司 | Method for determining chlorine ion content in coke |
| CN107764869A (en) * | 2016-08-23 | 2018-03-06 | 中国科学院上海硅酸盐研究所 | The cannot-harm-detection device of the solvable salt content of Movable Cultural Relics |
| CN106501122A (en) * | 2016-11-10 | 2017-03-15 | 北京市环境保护监测中心 | The automatic measurement system of total dissolved solid content and method |
| CN107202865B (en) * | 2017-05-12 | 2020-08-21 | 上海大学 | Method for rapidly detecting stability and toxicity of heavy metals in household garbage incineration fly ash |
| CN107202865A (en) * | 2017-05-12 | 2017-09-26 | 上海大学 | Heavy metal stabilizing and the quick determination method of toxicity in domestic garbage incineration flyash |
| CN108088874A (en) * | 2017-12-12 | 2018-05-29 | 西南石油大学 | A kind of leaching method of black shale soluble salt |
| CN108508064B (en) * | 2018-03-22 | 2020-08-14 | 中国科学院上海硅酸盐研究所 | Detection equipment for content of soluble salt on surface of cultural relic |
| CN109443978A (en) * | 2018-11-16 | 2019-03-08 | 沈阳环境科学研究院 | A kind of boiler slag phosphorus content on-line monitoring system |
| CN109932275A (en) * | 2019-04-17 | 2019-06-25 | 成都虹波钼业有限责任公司 | The detection method of sulfate radical content in a kind of molybdenum base solution |
| CN112129614A (en) * | 2020-08-31 | 2020-12-25 | 浙江工业大学 | Environmental impact evaluation method for road backfill by using renewable solid waste material |
| CN112129614B (en) * | 2020-08-31 | 2022-10-28 | 浙江工业大学 | Environmental impact evaluation method for road backfill by using renewable solid waste material |
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Application publication date: 20131127 |