CN107365129A - It is a kind of to utilize the method for being classified tail salt production sylvite ore cemented filling material - Google Patents
It is a kind of to utilize the method for being classified tail salt production sylvite ore cemented filling material Download PDFInfo
- Publication number
- CN107365129A CN107365129A CN201710778498.8A CN201710778498A CN107365129A CN 107365129 A CN107365129 A CN 107365129A CN 201710778498 A CN201710778498 A CN 201710778498A CN 107365129 A CN107365129 A CN 107365129A
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- CN
- China
- Prior art keywords
- tail salt
- sylvite ore
- filling material
- cemented filling
- tail
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The present invention provides a kind of method for producing sylvite ore cemented filling material using tail salt is classified, and belongs to mineral engineering field and technical field of resource comprehensive utilization.Key step is as follows：Sieved after tail salt is dried, required to prepare the aggregate of three kinds of different gradations according to different fluidities, and be sylvite ore tail salt with the ratio control range of saltwater brine and cementing agent：Saltwater brine：Cementing agent=53%~74.5%：30%~45%：0.5%~5%, obtained sylvite ore cemented filling material is uniformly mixed in proportion.Degree of loss of the fluidity of casting resin with the time is adjusted by using the sylvite ore tail salt of different gradation, to adapt to the filling of different fed distances and underground production, casting resin compression strength after conserving 28 days can reach 0.5MPa~2.0MPa.Comprehensively solve of the present invention sylvite ore tail salt, saltwater brine the like waste are difficult and are not easy the problem comprehensively utilized, and pass through the adjustment to tail salt grading, make sylvite ore cemented filling material that there is more preferable transportation performance, while improve the anti-isolation ability of casting resin, improve the production efficiency of mining with stowing.
Description
Technical field
The present invention relates to mineral engineering field and technical field of resource comprehensive utilization, a kind of more particularly to utilize is classified tail
The trade wastes such as salt, saltwater brine are the method that raw material produces sylvite ore cemented filling material.
Background technology
Cemented filling material typically use using rubble, river sand or tailings or Gobi aggregate as aggregate and with cement or lime glue
Knot material adds water to mix to form slurry or lotion, and filling area is transported in a manner of pipeline pumping or flow by gravity.It is cementing to fill
Filler contains a certain proportion of binder materials, has higher intensity and globality, has higher operational security, meeting
The rate of extraction of ore and the operating efficiency of stope can be improved while various underground support demands.
Sylvite is one of indispensable three big fertilizer of agricultural mainly for the manufacture of potash fertilizer.China is big as an agricultural
State, potassium resource are the strategic resources played an important roll to Chinese Economy Development.The underground sylvite of dry method mining codes is used at present
Ore deposit, the goaf formed in exploitation needs backfill in time, otherwise easily causes geology to collapse, and then influences sylvite ore just
It is normally opened to adopt and the rate of extraction.At the same time, sylvite ore can produce substantial amounts of tail salt and tail washings in ore dressing process.Tail salt main component
For sodium chloride crystal, there is big yield, immediate water-solubility, stockpiling capital expenditure is big, floor space is more, can not only bring
Heavy financial burden and serious environmental pollution is easily caused to surface water body.Tail washings main component is magnesium chloride solution,
Processing procedure also have deposit it is difficult, costly and the problems such as be easily destroyed ecological environment.
Therefore, sodium chloride tail salt is subjected to classification and Gradation Optimization is used as the aggregate of cemented filling material, while by magnesium chloride
Saltwater brine fills a certain amount of cementing agent production cemented filling material and is filled to goaf as reaction medium.By controlling tail salt
Grading and cementing agent, saltwater brine dosage coordinate solve casting resin mobility and intensity of both problem.This method is not only
Realize that the backfill of byproduct tail salt and magnesium chloride saltwater brine utilizes, ensure underground mining safety, solve the production and processing of ground potash fertilizer
Environmental protection problem, and solid waste resource is made full use of, there is very big economic value and social value.
The content of the invention
The side for being classified tail salt production sylvite ore cemented filling material is utilized the technical problem to be solved in the present invention is to provide a kind of
Method, it is intended to using sylvite ore in ore dressing process the aggregate of caused sodium chloride tail salt and magnesium chloride saltwater brine respectively as casting resin
And reaction medium, it can not recycle caused environmental problem so as to solve the stockpiling of tail salt and saltwater brine.Tail salt is classified simultaneously
A hundred per cent full utilization is carried out afterwards, so as to reduce the secondary pollution to environment, improves solid waste resource utilization, reduction is filled
The material cost of filler.
This method comprises the following steps：
(1) tail salt is carried out being dried to moisture content 0.01~1%, will using the sieve that size is 4mm, 2.5mm, 0.63mm
Drying tail salt is sieved.
(2) by the tail salt of drying in step (1), following three kinds of different gradations are prepared according to different fluidity requirements respectively
Aggregate.It is 30%~60% that+4mm tail salt fines are milled to -0.15mm by the first, then with the -4mm well mixed use of tail salt
Make aggregate.It is 30%~60% that+2.5mm tail salt fines are milled to -0.15mm by second, and then the tail salt mixing with -2.5mm is equal
It is even to be used as aggregate.It is 30%~60% that -2.5mm+0.63mm tail salt fines are milled to -0.15mm by the third, then with+2.5mm
It is well mixed with -0.63mm tail salt and is used as aggregate.
(3) by any one in the tail salt of three kinds of gradings described in step (2) respectively with saltwater brine and cementing agent in proportion
It is uniformly mixed obtained sylvite ore cemented filling material.Tail salt in sylvite ore cemented filling material：Saltwater brine：The weight percent of cementing agent
Than for 53%~74.5%：25%~45%：0.5%~5%.
Further, the tail salt described in step (1) is that main component is produced in ore dressing process is sodium chloride to sylvite ore
Particulate matter, sodium chloride content >=95%, maximum particle size is Dmax≤9mm.
Further, the saltwater brine described in step (3) is that sylvite ore is caused using magnesium chloride to be main in ore dressing process
The content 30%~33% of magnesium chloride in the saltwater brine of composition, wherein saltwater brine, KCE content are 0.4%~0.6%, and sodium chloride contains
Measure as 0.9%~1.1%, calcium chloride content is 0.1%~0.15%.Sodium chloride reaches saturation in this saltwater brine.
Further, the cementing agent described in step (3) is mainly product of the limestone after high-temperature calcination after crushing,
Wherein calcining heat is 950 DEG C~1100 DEG C, and soaking time is 8 hours~12 hours.Product main component oxygen after calcining
It is 62.5%~71.5% to change calcium, and grinding to granularity -0.15mm is 40%~60%.Cementing agent can also be the calcining after activation
Mixed after one or more activated processing in dolomite dust, pulverized limestone, light-magnesite powder, calcium hydroxide, magnesium cement flour,
Or it is prepared after mixing after activation process.
Further, the sylvite ore cemented filling material described in step (3) is according to GB/T2419-94《Cement mortar flows
Spend assay method》Fluidity test is carried out, fluidity in 1 hour can be achieved and be maintained at more than 200mm；With live filling condition
Basis after being conserved 28 days under similar 34 DEG C of temperature, 30% humidity《Test method for strength of hydraulic cement mortar (ISO methods)》GB/
T17671-1999, which measures test block single shaft unconfined compressive strength, can reach 0.5MPa-2.0MPa.
The usefulness of the above-mentioned technical proposal of the present invention is as follows：
1. comprehensively solve sodium chloride tail salt, magnesium chloride saltwater brine the like waste are difficult and are not easy the problem comprehensively utilized,
Solves the pollution problem to environment.
2. 95%~98% is discarded object in the raw material that sylvite ore cemented filling material uses, therefore production cost drops significantly
It is low, help to alleviate the economic pressures of filling in mine, improve resource exploitation recovery comprehensive utilization ratio.
3. making full use of characteristic possessed by tail salt itself, the fluidity for changing casting resin is reached by the adjustment to grading
The degree of loss changed over time, make sylvite ore cemented filling material that there is more preferable transportation performance, at the same improve casting resin resist from
Analysis ability, improve the production efficiency of mining with stowing.
4. the sylvite ore cemented filling material has production method relatively simple, operating process is short, the spies such as process is easily controlled
Point.
Brief description of the drawings
Fig. 1 is a kind of process chart for producing the method for sylvite ore cemented filling material using tail salt is classified of the present invention.
Embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
The present invention is for current tail salt and saltwater brine utilizing status difference and directly stores up the problems such as environmental pollution is serious, there is provided
It is a kind of to utilize the method for being classified tail salt production sylvite ore cemented filling material.Fig. 1 is the process chart of this method, by Fig. 1 techniques
Done embodiment is as follows.
Embodiment 1
Certain tail salt sodium chloride content is 95%, maximum particle size 9mm.Tail salt is carried out being dried to moisture content be
0.6%, sieved using the sieve that size is 4mm, it is 50% that+4mm tail salt fines, which are milled to -0.15mm, then with -4mm's
Tail salt is well mixed to be used as aggregate.The content 32.79% of magnesium chloride, KCE content 0.58%, sodium chloride content in saltwater brine
For 1.08%, calcium chloride content 0.13%.Cementing agent is light-magnesite powder, and its calcination condition is 600 DEG C of calcining heat, protected
Warm time 10h, the magnesia after calcining is levigate to -100 mesh contents 50%.By tail salt respectively with saltwater brine and cementing agent tail in proportion
Salt：Saltwater brine：Cementing agent=63%：35%：2% is uniformly mixed obtained sylvite ore cemented filling material.The sylvite ore glue of production
It is 220mm to tie casting resin initial flow degree, and fluidity is 180mm after 1 hour, and fluidity is 150mm after 2 hours, maintenance 28
Compression strength can reach 0.89MPa after it.
Embodiment 2
Certain tail salt sodium chloride content is 95%, maximum particle size 8mm.Tail salt is carried out being dried to moisture content be
0.8%, to be sieved using the sieve that size is 2.5mm, it is 45% that+2.5mm tail salt fines, which are milled to -0.15mm, then same -
2.5mm tail salt is well mixed to be used as aggregate.The content 32.23% of magnesium chloride, KCE content 0.55%, chlorination in saltwater brine
Sodium content is 1.0%, calcium chloride content 0.12%.Cementing agent is magnesium cement flour.Tail salt is pressed with saltwater brine and cementing agent respectively
Ratio tail salt：Saltwater brine：Cementing agent=60%：36.5%：3.5% is uniformly mixed obtained sylvite ore cemented filling material.Production
Sylvite ore cemented filling material initial flow degree be 210mm, fluidity is 170mm after 1 hour, and fluidity is after 2 hours
150mm, compression strength can reach 0.92MPa after conserving 28 days.
Embodiment 3
Certain tail salt sodium chloride content is 95%, maximum particle size 9mm.Tail salt is carried out being dried to moisture content be
0.5%, sieved using the sieve that size is 2.5mm and 0.63mm, -2.5mm+0.63mm tail salt fines are milled to -0.15mm
For 44%, then the tail salt with+2.5mm and -0.63mm well mixed is used as aggregate.The content 33.0% of magnesium chloride in saltwater brine,
KCE content is 0.5%, sodium chloride content 1.0%, calcium chloride content 0.11%.Cementing agent is to be fired through 1400 DEG C of high temperature
The gas shuttle kiln sintering soak calcined dolomite powder of 8 hours, grinding to granularity -0.15mm are 45%.By tail salt respectively with saltwater brine
With cementing agent tail salt in proportion：Saltwater brine：Cementing agent=55%：40%：5% is uniformly mixed obtained sylvite ore consolidated fill
Material.The sylvite ore cemented filling material initial flow degree of production is 230mm, and fluidity is 200mm after 1 hour, is flowed after 2 hours
Spend for 180mm, compression strength can reach 0.85MPa after maintenance 28 days.
Embodiment 4
Certain tail salt sodium chloride content is 95%, maximum particle size 9mm.Tail salt is carried out being dried to moisture content be
0.8%, to be sieved using the sieve that size is 2.5mm, it is 45% that+2.5mm tail salt fines, which are milled to -0.15mm, then same -
2.5mm tail salt is well mixed to be used as aggregate.The content 33.0% of magnesium chloride, KCE content 0.5%, sodium chloride in saltwater brine
Content is 1.0%, calcium chloride content 0.11%.Cementing agent is forged for the limestone after crushing through 1050 DEG C of high temperature gas firing shuttle kilns
Insulation 8 hours is burnt, product main component calcium oxide is 71.5% after calcining, and grinding to granularity -0.15mm is 46%.By tail salinity
Not with saltwater brine and cementing agent tail salt in proportion：Saltwater brine：Cementing agent=74.5%：25%：0.5% is uniformly mixed obtained sylvite
Ore deposit cemented filling material.The sylvite ore cemented filling material initial flow degree of production is more than 300mm, after 1 hour fluidity be 260mm,
Denseness is 10.7cm, bleeding rate 5.60%；Fluidity is 160mm after 2 hours, and denseness 6.4cm, bleeding rate are
2.80%, compression strength can reach 1.15MPa after conserving 28 days.
Embodiment 5
Certain tail salt sodium chloride content is 95%, maximum particle size 9mm.Tail salt is carried out being dried to moisture content be
0.8%, to be sieved using the sieve that size is 2.5mm, it is 45% that+2.5mm tail salt fines, which are milled to -0.15mm, then same -
2.5mm tail salt is well mixed to be used as aggregate.The content 33.0% of magnesium chloride, KCE content 0.5%, sodium chloride in saltwater brine
Content is 1.0%, calcium chloride content 0.11%.Cementing agent is forged for the limestone after crushing through 1050 DEG C of high temperature gas firing shuttle kilns
Insulation 8 hours is burnt, product main component calcium oxide is 71.5% after calcining, and grinding to granularity -0.15mm is 50%.By tail salinity
Not with saltwater brine and cementing agent tail salt in proportion：Saltwater brine：Cementing agent=69%：30%：1% is uniformly mixed obtained sylvite ore glue
Tie casting resin.The sylvite ore cemented filling material initial flow degree of production is more than 300mm, and fluidity is 200mm, denseness after 1 hour
For 5.4cm, bleeding rate 3.61%；Fluidity is 160mm after 1.5 hours, and bleeding rate is 1.89% after 2 hours, is conserved 3 days
Compression strength can reach 0.38MPa afterwards, and 0.61MPa can be reached after 7 days, 1.38MPa can be reached after 28 days.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of utilize the method for being classified tail salt production sylvite ore cemented filling material, it is characterised in that：
(1) tail salt is carried out being dried to moisture content 0.01~1%, will be dried using the sieve that size is 4mm, 2.5mm, 0.63mm
Tail salt is sieved；
(2) by the tail salt of drying in step (1), required to prepare the tail salt bone of three kinds of different gradations respectively according to different fluidities
Material；
(3) the tail salt aggregate of three kinds of different gradations described in step (2) is stirred in proportion with saltwater brine and cementing agent respectively mixed
Close uniformly obtained sylvite ore cemented filling material；Tail salt aggregate in sylvite ore cemented filling material：Saltwater brine：The percentage by weight of cementing agent
For 53%~65%：30%~45%：0.5%~5%.
2. a kind of method for producing sylvite ore cemented filling material using tail salt is classified according to claim 1, its feature exist
In：Tail salt described in step (1) is the particulate matter that sylvite ore produces that main component is sodium chloride in ore dressing process, sodium chloride
Content >=95%, maximum particle size are Dmax≤9mm.
3. a kind of method for producing sylvite ore cemented filling material using tail salt is classified according to claim 1, its feature exist
In：The tail salt aggregate of three kinds of different gradations described in step (2) is：+ 4mm tail salt fines are milled to -0.15mm by the first
30%~60%, then the tail salt with -4mm, which is well mixed, is used as aggregate；Second+2.5mm tail salt fines are milled to -0.15mm
For 30%~60%, then the tail salt with -2.5mm well mixed is used as aggregate；The third is by -2.5mm+0.63mm tail salt fines
It is 30%~60% to be milled to -0.15mm, and then the tail salt with+2.5mm and -0.63mm, which is well mixed, is used as aggregate.
4. a kind of method for producing sylvite ore cemented filling material using tail salt is classified according to claim 1, its feature exist
In：Saltwater brine described in step (3) is saltwater brine of the sylvite ore using magnesium chloride as major solute caused by ore dressing process, wherein
The content 20%~35% of magnesium chloride in saltwater brine, KCE content 0.4%-0.6%, sodium chloride content be 0.9%~
1.1%, calcium chloride content is 0.1%~0.15%；Sodium chloride reaches saturation in this saltwater brine.
5. a kind of method for producing sylvite ore cemented filling material using tail salt is classified according to claim 1, its feature exist
In：Cementing agent described in step (3) is mainly product of the limestone after high-temperature calcination after crushing, and wherein calcining heat is
950 DEG C~1100 DEG C, soaking time is -12 hours 8 hours；Product main component calcium oxide after calcining for 62.5%~
71.5%, grinding to granularity -0.15mm is 40%~60%；Cementing agent can also be by the calcined dolomite powder after activating, light-burned oxygen
It is mixed with and forms after one or more activated processing in change magnesium powder, magnesium cement flour, or is prepared after mixing through activation process
Form.
6. a kind of method for producing sylvite ore cemented filling material using tail salt is classified according to claim 1, its feature exist
In：Sylvite ore cemented filling material described in step (3) is according to GB/T2419-94《Test method for fluidity of cement mortar》Carry out
Fluidity is tested, and fluidity in 1 hour can be achieved and be maintained at more than 200mm；With live filling condition similar in 34 DEG C of temperature,
Basis after being conserved 28 days under 30% humidity《Test method for strength of hydraulic cement mortar (ISO methods)》GB/T17671-1999 measures test block list
Axle unconfined compressive strength can reach 0.5MPa-2.0MPa.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538289A (en) * | 2018-12-05 | 2019-03-29 | 飞翼股份有限公司 | A kind of underground filling material and preparation method thereof suitable for pipeline |
| CN111535853A (en) * | 2020-05-18 | 2020-08-14 | 老挝开元矿业有限公司 | Improved formula of filling and backfilling process after mining of novel underground sylvite |
| CN111635203A (en) * | 2020-07-01 | 2020-09-08 | 河北充填采矿技术有限公司 | Cementing material and preparation method thereof, and sylvite tailing filling material and preparation method thereof |
| CN114804681A (en) * | 2022-05-20 | 2022-07-29 | 山东省章丘鼓风机股份有限公司 | Method for preparing composite modified magnesium oxychloride cement by using industrial waste salt |
| CN117686307A (en) * | 2024-02-04 | 2024-03-12 | 中国矿业大学(北京) | Control method for different water contents in uniaxial compression mechanical test of solid potassium salt ore |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109538289A (en) * | 2018-12-05 | 2019-03-29 | 飞翼股份有限公司 | A kind of underground filling material and preparation method thereof suitable for pipeline |
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| CN111635203A (en) * | 2020-07-01 | 2020-09-08 | 河北充填采矿技术有限公司 | Cementing material and preparation method thereof, and sylvite tailing filling material and preparation method thereof |
| CN111635203B (en) * | 2020-07-01 | 2022-03-29 | 河北充填采矿技术有限公司 | Cementing material and preparation method thereof, and sylvite tailing filling material and preparation method thereof |
| CN114804681A (en) * | 2022-05-20 | 2022-07-29 | 山东省章丘鼓风机股份有限公司 | Method for preparing composite modified magnesium oxychloride cement by using industrial waste salt |
| CN117686307A (en) * | 2024-02-04 | 2024-03-12 | 中国矿业大学(北京) | Control method for different water contents in uniaxial compression mechanical test of solid potassium salt ore |
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| CN107365129B (en) | 2020-06-19 |
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