CN107540303A - A kind of preparation method of mine worked-out section filling slurry - Google Patents
A kind of preparation method of mine worked-out section filling slurry Download PDFInfo
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- CN107540303A CN107540303A CN201710692437.XA CN201710692437A CN107540303A CN 107540303 A CN107540303 A CN 107540303A CN 201710692437 A CN201710692437 A CN 201710692437A CN 107540303 A CN107540303 A CN 107540303A
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Abstract
The invention discloses a kind of preparation method of mine worked-out section filling slurry.The preparation method, comprises the following steps：1) ardealite, loess, slag and slag are mixed, obtains premix；2) premix and water reducer are mixed, obtains gelling agent；3) gelling agent, cement and water are mixed, obtains filling slurry.The present invention is directed to the requirement of filling in mine, have developed the filling in mine slurry using ardealite and loess as raw material.Compared with current cement, the intensity of slurry of the present invention is integrally better than used cement, can fully meet the mobility required by filling in mine.The filling slurry of the present invention replaces flyash using loess, not only solves the problems, such as goaf filling aggregate deficiency, also makes filling cost lower, while is also beneficial to consume the ardealite of bulk deposition, has good environmental benefit.
Description
Technical field
The present invention relates to a kind of preparation method of mine worked-out section filling slurry.
Background technology
Ardealite is the industry byproduct of phosphorous chemical industry enterprise Wet-process phosphoric acid (WPPA), and every 1 ton of phosphoric acid will produce about 5 tons of phosphorus stone
Cream.With the fast development of China's phosphorus chemical industry, annual by-product ardealite alreadys exceed 40,000,000 tons, adds up the phosphorus of accumulation
Gypsum is more than about 200,000,000 tons.Due to a variety of causes, China's ardealite resource utilization rate less than 15%, make by remaining part at present
To accumulate or fill for solid waste, this not only occupies substantial amounts of soil, and serious pollution is also caused to surrounding environment, because
This accelerates very urgent to the recycling of ardealite.
Loess Plateau is the area that loess distribution is most on the earth, is affected by it, and loess is in China central and west regions
It is widely distributed, including the ground such as Qinghai, Shaanxi, Shanxi, the Inner Mongol, Henan, Hebei.Loess is considered as weathering more and precipitates to be formed, its
Formed age is later, and property is loose porous, and cohesive force is poor, and particle is thinner, the silty sand belonged in sandy soil.Shanxi area loess is general
All over distribution, there is the characteristics of cheap and easy to get, possess the natural resources advantage of uniqueness.
Mine leaves numerous goafs after largely exploiting, and potential safety hazard is brought to reproduction and lives and properties.Note
Slurry filling is the old dead zone Main Means of processing, and the cost of filler plays conclusive shadow to the economic benefit of grouting program
Ring, the filling in mine material generally used now is Cement fly ash.With the augmentation of flyash purposes in recent years and its
Demand increases, and flyash price is also increasing year by year.Important set of the flyash as present many old Filling mine-out area materials
Into part, the growth of its price undoubtedly increases considerably old Filling mine-out area cost, so searching out for old Filling mine-out area
Coal ash instead product, there is practical value.
The filling cementing agent that current most of filling in mine mining codes use remains as portland cement, is filled suitable for mine
The special binder materials for filling out feature is also rare.
The content of the invention
It is an object of the invention to provide a kind of preparation method of mine worked-out section filling slurry.
The technical solution used in the present invention is：
A kind of preparation method of mine worked-out section filling slurry, comprises the following steps：
1) ardealite, loess, slag and slag are mixed, obtains premix；
2) premix and water reducer are mixed, obtains gelling agent；
3) gelling agent, cement and water are mixed, obtains filling slurry.
In step 1), ardealite, loess, slag, the mass ratio of slag are 100：(35~45)：(20~45)：(10~
25)。
In step 1), slag is blast furnace slag.
In step 2), the dosage of water reducer is the 0.2~1% of premix quality.
In step 2), water reducer is lignin sulfonate water reducer, naphthalene water reducer, melamine system water reducer, ammonia
At least one of base sulfonate based water reducer, fatty acid series water reducer, poly carboxylic acid series water reducer.
In step 3), the mass ratio of gelling agent and cement is 1：(3~8).
In step 3), cement is 42.5 or 42.5R type cement.
In step 3), the solid content of filling slurry is 55wt%~65wt%.
The beneficial effects of the invention are as follows：
The present invention is directed to the requirement of filling in mine, have developed the filling in mine slurry using ardealite and loess as raw material.
Compared with current cement, the intensity of slurry of the present invention is integrally better than used cement, required by fully meeting filling in mine
Mobility.The filling slurry of the present invention replaces flyash using loess, not only solves asking for goaf filling aggregate deficiency
Topic, also makes filling cost lower, while is also beneficial to consume the ardealite of bulk deposition, has good environmental benefit.
Embodiment
A kind of preparation method of mine worked-out section filling slurry, comprises the following steps：
1) ardealite, loess, slag and slag are mixed, obtains premix；
2) premix and water reducer are mixed, obtains gelling agent；
3) gelling agent, cement and water are mixed, obtains filling slurry.
Preferably, in step 1), ardealite, loess, slag, the mass ratio of slag are 100：(35~45)：(20~45)：
(10~25).
Preferably, the chemical composition of ardealite is：SO3Content is 35wt%~40wt%, CaO content be 28wt%~
32wt%, SiO2Content is 7wt%~10wt%, P2O5Content is 1wt%~1.5wt%, Al2O3Content be 0.8wt%~
1.3wt%, Fe2O3Content is 0.5wt%~1.0wt%, and remaining is loss on ignition.
Loess preferably is selected from the loess of Shanxi area, and the particle diameter of loess accounts for more than 98wt% less than 1mm.
Preferably, the primary chemical composition of loess is：SiO2Content is 53wt%~58wt%, Al2O3Content is 25wt%
~30wt%, Fe2O3Content is 2.5wt%~3.5wt%, TiO2Content is 1wt%~2wt%.
Preferably, in step 1), slag is blast furnace slag.
Preferably, the chemical composition of slag is：CaO content is 35wt%~39wt%, SiO2 contents 28wt%~
31wt%, Al2O3 content are 13wt%~16wt%, and content of MgO is 8wt%~10wt%, Fe2O3 contents be 3wt%~
5wt%, remaining is loss on ignition.
Preferably, the chemical composition of slag is：CaO content is 38wt%~41wt%, Fe2O3Content be 16wt%~
18wt%, SiO2Content is 13wt%~15wt%, and content of MgO is 7wt%~9wt%, Al2O3Content is 6wt%~8wt%,
SO3Content be 6wt%~8wt%, surplus is loss on ignition.
Preferably, in step 2), the dosage of water reducer is the 0.2~1% of premix quality；It is further preferred that diminishing
The dosage of agent is the 0.2~0.5% of premix quality.
Preferably, in step 2), water reducer is lignin sulfonate water reducer, naphthalene water reducer, melamine series subtract
Aqua, at least one of sulfamate based water reducer, fatty acid series water reducer, poly carboxylic acid series water reducer；Further preferably
, water reducer is poly carboxylic acid series water reducer.
Preferably, in step 3), the mass ratio of gelling agent and cement is 1：(3~8).
Preferably, in step 3), cement is 42.5 or 42.5R type cement.
Preferably, in step 3), the solid content of filling slurry is 55wt%~65wt%.
In the present invention, the main component of ardealite is dihydrate gypsum, and itself does not simultaneously have gelling.But gypsum and some tools
There is the industrial residue of latent hydraulicity, under the conditions of appropriate basicity (slag), hydration reaction can occur and generate stable aquation
Product.Loess has the characteristics of loose porous, particle is thin, and surface area is big, contributes to the absorption of each raw material and scattered, formation
More stable hydrated product.Simultaneously because the wide price in loess source is low, the production cost of binder materials can be reduced.With without forging
The ardealite for burning processing is primary raw material, and is aided with loess, passes through the blast furnace slag for adding steel and iron industry and a small amount of alkalescence
Exciting agent, it is mixed and finely ground the hydraulic cementing materials that a kind of higher-strength of Novel low-consumption can be made.
Present disclosure is described in further detail below by way of specific embodiment.
In the following example, the chemical composition of ardealite used is：SO3Content is 38.9%, CaO content 30.4%,
SiO2Content is 8.7%, P2O5Content is 1.3%, Al2O3Content is 1.1%, Fe2O3Content is 0.7%, and remaining is loss on ignition；
The chemical composition of loess is：SiO2Content is 55.6%, Al2O3Content is 28.2%, Fe2O3Content is 3.02%, TiO2Content
For 1.28%, loss on ignition 8.7%, remaining is trace element；The particle diameter distribution of loess is：Particle less than 40 μm accounts for
16.1wt%, the particle more than 40 μm and less than 85 μm account for 36.7wt%, and the particle more than 85 μm less than 1mm accounts for 45.3wt%；
Slag is blast furnace slag, and its chemical composition is：CaO content is 38.2%, SiO2Content 30.5%, Al2O3Content is
15.3%, content of MgO 9.7%, Fe2O3Content is 4.3%, and remaining is loss on ignition；The chemical composition of slag is：CaO content is
40.3%, Fe2O3Content is 17.5%, SiO2Content is 14.8%, content of MgO 8.3%, Al2O3Content is 7.5%, SO3's
Content is 7.1%, and surplus is loss on ignition；Water reducer is poly carboxylic acid series water reducer.
Embodiment 1：
Embodiment 1 fills the preparation method of slurry, comprises the following steps：
1) 100kg ardealites, 42kg loess, 41kg slags and 25kg slags are mixed, obtains premix；
2) premix and 1kg water reducers are mixed, obtains gelling agent；
3) by gelling agent and 42.5 type Portland cements in mass ratio 1:6 mixing, and add water to be configured to solid content and be
60wt% fills slurry.
Embodiment 2：
Embodiment 2 fills the preparation method of slurry, comprises the following steps：
1) 100kg ardealites, 37kg loess, 36kg slags and 19kg slags are mixed, obtains premix；
2) premix and 0.7kg water reducers are mixed, obtains gelling agent；
3) by gelling agent and 42.5 type Portland cements in mass ratio 1:6 mixing, and add water to be configured to solid content and be
60wt% fills slurry.
Embodiment 3：
Embodiment 3 fills the preparation method of slurry, comprises the following steps：
1) 100kg ardealites, 37kg loess, 33kg slags and 15kg slags are mixed, obtains premix；
2) premix and 0.4kg water reducers are mixed, obtains gelling agent；
3) by gelling agent and 42.5 type Portland cements in mass ratio 1:6 mixing, and add water to be configured to solid content and be
60wt% fills slurry.
Embodiment 4：
Embodiment 4 fills the preparation method of slurry, comprises the following steps：
1) 100kg ardealites, 36kg loess, 20kg slags and 21kg slags are mixed, obtains premix；
2) premix and 0.8kg water reducers are mixed, obtains gelling agent；
3) by gelling agent and 42.5 type Portland cements in mass ratio 1:6 mixing, and add water to be configured to solid content and be
60wt% fills slurry.
Embodiment 5：
Embodiment 5 fills the preparation method of slurry, comprises the following steps：
1) 100kg ardealites, 35kg loess, 22kg slags and 10kg slags are mixed, obtains premix；
2) premix and 0.4kg water reducers are mixed, obtains gelling agent；
3) by gelling agent and 42.5 type Portland cements in mass ratio 1:6 mixing, and add water to be configured to solid content and be
60wt% fills slurry.
Comparative example：
Make to contrast ratio with used pulverized fuel ash cement filling slurry, the solid content of comparative example slurry is all
60wt%.
Embodiment 1~5 and comparative example are pressed《Standard for test methods of properties of ordinary concrete mixture standard》(GB/T
The slump of method test filler 50080-2016)；Press《Standard for test methods of mechanical properties of ordinary concrete》(GB/T
The syneresis rate and the unlimited side compression strength of 28 days of method test 70.7mm*70.7mm*70.7mm test specimens 50081-2016).
The test structure of embodiment 1~5 and each performance of comparative example is as shown in table 1.
The results of property of the embodiment of table 1 and comparative example slurry
| The slump (cm) | Syneresis rate (%) | 28 days intensity (MPa) | |
| Embodiment 1 | 26.0 | 9.2 | 2.6 |
| Embodiment 2 | 25.9 | 9.3 | 2.6 |
| Embodiment 3 | 25.1 | 9.0 | 3.1 |
| Embodiment 4 | 25.6 | 9.6 | 3.0 |
| Embodiment 5 | 25.8 | 9.9 | 2.7 |
| Comparative example | 24.3 | 8.5 | 2.6 |
From the point of view of test result, the filling slurry performance that the present invention is prepared is superior to existing filling slurry, so
The filling slurry of the present invention can substitute existing pulverized fuel ash cement filling slurry, the filling for mine.
Claims (8)
- A kind of 1. preparation method of mine worked-out section filling slurry, it is characterised in that：Comprise the following steps：1) ardealite, loess, slag and slag are mixed, obtains premix；2) premix and water reducer are mixed, obtains gelling agent；3) gelling agent, cement and water are mixed, obtains filling slurry.
- A kind of 2. preparation method of mine worked-out section filling slurry according to claim 1, it is characterised in that：Step 1) In, ardealite, loess, slag, the mass ratio of slag are 100：(35~45)：(20~45)：(10~25).
- A kind of 3. preparation method of mine worked-out section filling slurry according to claim 2, it is characterised in that：Step 1) In, slag is blast furnace slag.
- A kind of 4. preparation method of mine worked-out section filling slurry according to claim 1, it is characterised in that：Step 2) In, the dosage of water reducer is the 0.2~1% of premix quality.
- A kind of 5. preparation method of mine worked-out section filling slurry according to claim 4, it is characterised in that：Step 2) In, water reducer is lignin sulfonate water reducer, naphthalene water reducer, melamine system water reducer, sulfamate system diminishing At least one of agent, fatty acid series water reducer, poly carboxylic acid series water reducer.
- A kind of 6. preparation method of mine worked-out section filling slurry according to claim 1, it is characterised in that：Step 3) In, the mass ratio of gelling agent and cement is 1：(3~8).
- A kind of 7. preparation method of mine worked-out section filling slurry according to claim 6, it is characterised in that：Step 3) In, cement is 42.5 or 42.5R type cement.
- A kind of 8. preparation method of mine worked-out section filling slurry according to claim 1, it is characterised in that：Step 3) In, the solid content of filling slurry is 55wt%~65wt%.
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Cited By (2)
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| CN108609964A (en) * | 2018-07-26 | 2018-10-02 | 成都理工大学 | A kind of goaf grouting filler |
| CN112759346A (en) * | 2021-01-12 | 2021-05-07 | 北京科技大学 | Underground goaf filling material and preparation method and application thereof |
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Cited By (2)
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| CN112759346A (en) * | 2021-01-12 | 2021-05-07 | 北京科技大学 | Underground goaf filling material and preparation method and application thereof |
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