CN116789257A - Method for controlling alkaline release and recycling of steel slag, product and application thereof - Google Patents
Method for controlling alkaline release and recycling of steel slag, product and application thereof Download PDFInfo
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- CN116789257A CN116789257A CN202310654536.4A CN202310654536A CN116789257A CN 116789257 A CN116789257 A CN 116789257A CN 202310654536 A CN202310654536 A CN 202310654536A CN 116789257 A CN116789257 A CN 116789257A
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- 239000002893 slag Substances 0.000 title claims abstract description 184
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 177
- 239000010959 steel Substances 0.000 title claims abstract description 177
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000004064 recycling Methods 0.000 title claims abstract description 23
- 239000002689 soil Substances 0.000 claims abstract description 104
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 239000002253 acid Substances 0.000 claims abstract description 65
- 239000002245 particle Substances 0.000 claims abstract description 64
- 239000000463 material Substances 0.000 claims abstract description 40
- 238000002156 mixing Methods 0.000 claims abstract description 24
- 239000003864 humus Substances 0.000 claims description 51
- 230000002378 acidificating effect Effects 0.000 claims description 35
- 238000000746 purification Methods 0.000 claims description 22
- 239000000126 substance Substances 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 13
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 238000012216 screening Methods 0.000 description 8
- 230000002572 peristaltic effect Effects 0.000 description 6
- 230000000813 microbial effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000004021 humic acid Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000003415 peat Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- PUKLDDOGISCFCP-JSQCKWNTSA-N 21-Deoxycortisone Chemical compound C1CC2=CC(=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@@](C(=O)C)(O)[C@@]1(C)CC2=O PUKLDDOGISCFCP-JSQCKWNTSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- FCYKAQOGGFGCMD-UHFFFAOYSA-N Fulvic acid Natural products O1C2=CC(O)=C(O)C(C(O)=O)=C2C(=O)C2=C1CC(C)(O)OC2 FCYKAQOGGFGCMD-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002509 fulvic acid Substances 0.000 description 1
- 229940095100 fulvic acid Drugs 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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Abstract
The invention discloses a method for controlling alkaline release and recycling of steel slag, and a product and application thereof, and belongs to the technical field of slag melting treatment. The method comprises the following steps: (1) The steel slag is crushed and sieved to obtain steel slag particles; (2) And uniformly mixing the steel slag particles with the acid soil in proportion, controlling the alkaline release of the steel slag and recycling the steel slag to obtain the water purifying material. The material has wide sources, low cost, simple process and environmental friendliness, and the prepared water purifying material has good water purifying effect, and expands the application field of the water purifying material in water environment treatment by recycling the steel slag.
Description
Technical Field
The invention relates to the technical field of slag melting treatment, in particular to a method for controlling alkaline release of steel slag and recycling utilization, and a product and application thereof.
Background
As the total amount of steel production increases rapidly, the total amount of steel slag also increases dramatically. The steel-making process has a large amount of steel slag discharged, and about 130-240 kg of steel slag is produced per 1t of steel. However, due to the limitation of the prior art, a large amount of steel slag cannot be effectively utilized, so that the steel slag is in an open-air stacking and landfill state, resources are wasted, a large amount of land is occupied, and environmental pollution is seriously caused. The generation of a large amount of steel slag has great influence on the ecological environment, and the content of free calcium oxide (f-CaO) in the steel slag is high, so that the steel slag is one of the main factors influencing the environment. Therefore, the research on a better steel slag treatment method is significant, not only can greatly reduce the environmental pollution caused by steel slag, but also can better recycle the steel slag. How to effectively and economically reduce f-CaO in steel slag is a problem that needs to be considered first.
The current main ways of treating steel slag are as follows: hot splashing, roller, wind quenching, chi Shire stuffiness, etc. The hot splashing method is a common steel slag treatment method, has small investment and low cost, but the method has large pollutant emission and serious pollution to the atmosphere, water and other resources. Compared with the hot splashing method, the air quenching method has the advantages that the environmental friendliness is improved, but the air quenching method still causes no small pollution, and the metal recovery rate is lower. Compared with the former two methods, the roller method has less steel slag discharge, and the treated steel slag has good stability, but has the defects of smaller application range and difficult overall popularization. Compared with a roller method, the pool type hot-closed method has wider application range, generates less pollution, but has poorer efficiency for treating the steel slag. Therefore, the main flow process for treating the steel slag has more or less defects, so that the search for a steel slag treatment mode which is environment-friendly, economical and applicable and has higher treatment efficiency is already a major concern in the industry. The f-CaO in the steel slag is lower, so that the stability of the steel slag is improved, and the recycling degree of the steel slag is improved, which is the important point of the problem of steel slag disposal.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, in a first aspect of the present invention, a method for controlling alkaline release and recycling of steel slag is provided, which has advantages of low cost, simple process and environmental friendliness, and includes the following steps:
(1) The steel slag is crushed and sieved to obtain steel slag particles;
(2) And uniformly mixing the steel slag particles with the acid soil in proportion, controlling the alkaline release of the steel slag and recycling the steel slag to obtain the water purifying material.
Preferably, in the step (1), the grain size of the steel slag particles is between 1 and 50 mm.
Further preferably, the grain size of the steel slag particles is between 3 and 10 mm.
Preferably, in the step (2), the acid soil is at least one of acid humus soil and acid red soil.
According to the invention, the acid humus soil, the acid red soil and the steel slag are mixed, the humic acid provided by the humus soil and the acid substances provided by the acid red soil are strong in acidity, free calcium oxide in the steel slag can be effectively neutralized, and the stability of the steel slag is improved; compared with common strong acid, the acid release in the two kinds of soil is slower, the alkaline release in the steel slag can be controlled for a long time, and the method is more friendly to water environment. The free calcium oxide reacts with humic acid to generate calcium humate precipitate, which is difficult to dissolve in water, thereby reducing the alkalinity of steel slag and reducing the influence of free calcium ions on the environment. Organic humic acid such as fulvic acid, humic acid and the like in the acidic humus soil, and carbonate substances and iron-rich aluminum oxide in the acidic red soil can provide acidic substances for the steel slag to neutralize alkali of the steel slag; the fluffy structure of the humus soil can complex part of heavy metal ions in the steel slag, and the adverse effect of the steel slag on the environment is reduced. The mixture of the acid humus soil and the steel slag has good conditions for microbial growth, the humus soil can provide a certain carbon source, the humus soil greatly improves the possibility that the steel slag is used as a microbial film carrier after reducing the alkalinity of the steel slag, and the humus soil is a good carrier for microbial growth, so that the mixture of the acid humus soil and the steel slag greatly improves the effect of the steel slag on water purification, and is beneficial to playing a better purification role in water ecological restoration.
Further preferably, the pH of the acidic humus soil is less than 6.0.
Further preferably, when the acid soil is acid humus soil, the mass ratio of the acid humus soil to the steel slag particles is 0.2-3: 1.
further, when the acid soil adopts acid humus soil, the mass ratio of the acid humus soil to the steel slag particles is 0.5-1: 1.
further preferably, the acidic red soil has a pH of < 5.0.
Further preferably, when the acid soil adopts acid red soil, the mass ratio of the acid humus soil to the steel slag particles is 0.5-10: 1.
further, when the acid soil adopts acid red soil, the mass ratio of the acid humus soil to the steel slag particles is 2:1.
further preferably, when the acid soil adopts both acid humus soil and acid red soil, the mass ratio of the acid humus soil to the steel slag particles is 0.1-3: 1, the mass ratio of the acid red soil to the steel slag particles is 1-15: 3.
in a second aspect of the present invention there is provided a water purification material having a good purification effect on a body of water, the water purification material being made by the method of the first aspect of the present invention.
In a third aspect of the present invention there is provided the use of the water purification material of the second aspect of the present invention as a filtering substance in the purification of a body of water.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention provides a method for controlling alkaline release and recycling of steel slag, which has the advantages of wide material source, low cost, simple process and environmental friendliness. The acid soil and the steel slag particles are combined to achieve the aim of modifying the steel slag, the acid soil can neutralize alkaline substances in the steel slag, the acid substances can complex part of heavy metal ions generated in the steel slag, and adverse effects of the steel slag on the environment are reduced.
The invention provides a water purifying material which is prepared from acid soil and steel slag particles and has good water purifying effect.
The invention also provides application of the water purifying material in purifying water body as a filtering substance, and the application field of the water purifying material in water environment treatment is expanded by recycling the steel slag.
Drawings
FIG. 1 is a graph showing the pH change of the different experimental groups in example 1;
FIG. 2 is a graph showing the pH change of the different experimental groups in example 2;
FIG. 3 is a graph showing the pH change of the water purifying materials of the experimental groups 1-1 to 1-5 in the example 3;
FIG. 4 is a graph showing the pH change of the water purifying materials of the experimental groups 2-1 to 2-5 in the example 4;
fig. 5 is a graph showing the pH change of the water purifying material of example 5 when applied to purifying a water body.
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention. The experimental methods, in which specific conditions are not noted in the following examples, were selected according to conventional methods and conditions, or according to the commercial specifications.
In the following examples, the pH value of soil was measured according to the method of measuring potential of soil pH value (HJ 962-2018); the acidic humus adopts the smini acidic peat soil, and the pH=3.98; acidic red soil is from fomia province, ph=4.84; steel slag is provided by chinese baowu iron and steel group limited, ph=12.2.
Example 1
The method for controlling the alkaline release and the resource utilization of the steel slag comprises the following steps:
(1) Crushing by a slag crusher, screening the crushed steel slag, and selecting the steel slag with the grain diameter of 3-5 mm to obtain steel slag particles;
(2) And uniformly mixing the steel slag particles and the acidic humus according to different experimental group proportions, controlling the alkaline release of the steel slag and recycling the steel slag to obtain the corresponding water purifying material.
Table 1: mass ratio of acidic humus soil to steel slag particles in experimental group
The water purification materials prepared by mixing according to different proportions are put into a 50mL centrifuge tube, and the mass ratio of the water purification materials to water is 1:5 adding pure water into the centrifuge tube. After the full infiltration, the pH was measured with a pH meter, and the pH was measured every 24 hours to monitor the pH change. The experimental groups are used for preparing 2 groups of parallel samples, and the pH change condition graphs of the acidic humus and the steel slag particles under different mass mixing ratios are drawn.
As shown in figure 1, after the acidic humus soil is added, the alkaline release of the steel slag particles is obviously inhibited. The alkaline release of steel slag particles is inhibited to different degrees under 5 groups of different mass mixing ratios, wherein the acid humus soil is prepared by the following steps: the steel slag particles are 2: group pH of 1 was lowest, stable at 4.89, whereas acidic humus soil: the steel slag particles are 1: the pH of group 3 was highest and stabilized at 8.69.
Example 2
(1) Crushing by a slag crusher, screening the crushed steel slag, and selecting the steel slag with the grain diameter of 3-5 mm to obtain steel slag particles;
(2) And uniformly mixing the steel slag particles and the acid red soil according to different experimental group proportions, controlling the alkaline release of the steel slag and recycling the steel slag to obtain the corresponding water purifying material.
Table 2: mass ratio of acid red soil to steel slag particles in experimental group
| Name of the name | m (acid red soil): m (Steel slag granules) |
| 2-1 | 2：1 |
| 2-2 | 1：1 |
| 2-3 | 1：1.5 |
| 2-4 | 1：2 |
| 2-5 | 1：3 |
The water purification materials prepared by mixing according to different proportions are put into a 50mL centrifuge tube, and the mass ratio of the water purification materials to water is 1:5 adding pure water into the centrifuge tube. After the full infiltration, the pH was measured with a pH meter, and the pH was measured every 24 hours to monitor the pH change. The experimental groups are used for preparing 2 groups of parallel samples, and the pH change condition graphs of the acidic red soil and the steel slag particles under different mass mixing ratios are drawn.
As shown in FIG. 2, after the acid red soil is added, the acid red soil has a certain inhibition effect on the alkaline release of the steel slag particles, but has a smaller effect than the acid humus soil. The alkaline release of the steel slag particles is inhibited to different degrees under 5 groups of different mass mixing ratios, wherein the acid red soil: the steel slag particles are 2: group pH of 1 was lowest, stable at 10.26, whereas humus soil: the steel slag particles are 1: the pH of group 3 was highest and stable at 11.42.
Example 3
The application of the water purifying material as a filtering substance in purifying water body:
selecting the water purification materials obtained in the experimental groups 1-1 to 1-5 in the embodiment 1 as samples, sequentially filling the water purification materials in the experimental groups 1-1 to 1-5 into a chromatographic column, wherein the inner diameter of the chromatographic column is 2.6cm, the length of the chromatographic column is 20cm, and the empty column mass is 166.39g, 164.37g, 166.73g, 165.32g and 167.71g in sequence; the mass of the water-purifying material filled with the corresponding water-purifying material is 242.08g, 262.66g, 279.49g, 296.47g and 318.22g in sequence; injecting water into the 5 groups of chromatographic columns through peristaltic pumps until the columns are in a water saturation state, wherein the mass of the chromatographic columns after water saturation is 279.92g, 294.33g, 314.52g, 329.41g and 348.35g respectively; the chromatographic column after saturation with water seals both ends, water in the column is replaced by a peristaltic pump every 24 hours, water at the outlet end is subjected to pH detection, and a pH change condition diagram of the acidic humus soil and steel slag particles under the mixing ratio of the corresponding experimental group is drawn.
As shown in fig. 3, each set of pH changes showed an upward trend due to the reaction not reaching equilibrium. In the existing monitoring data, under 5 groups of mixing ratios with different mass, the alkaline release of steel slag particles is inhibited to different degrees, and the acidic humus soil: the steel slag particles are 2:1. 1:1. 1.5: the three groups of 1 have better control effect. Wherein the acidic humus soil: the steel slag particles are 1: group pH of 1 was lowest, 7.32, whereas acidic humus: the steel slag particles are 1: the group pH of 3 is highest, 11.50, but is lower than the initial pH of the steel slag. After the alkalinity of the steel slag is reduced by the humus, the possibility that the steel slag is used as a microbial film carrier is greatly improved, the humus is a good carrier for the growth of microorganisms, the mixture of the humus and the carrier greatly improves the effect of the steel slag on water purification, and the steel slag can play a better role in purifying in water ecological restoration.
Example 4
The application of the water purifying material as a filtering substance in purifying water body:
selecting the water purification materials obtained in the experimental groups 2-1 to 2-5 in the embodiment 2 as samples, sequentially filling the water purification materials in the experimental groups 2-1 to 2-5 into a chromatographic column, wherein the inner diameter of the chromatographic column is 2.6cm, the length of the chromatographic column is 20cm, the empty column mass is 166.58g, 166.20g, 165.53g, 165.89g and 166.75g in sequence, and the mass after filling the corresponding water purification materials is 313.78g, 329.42g, 331.39g, 338.70g and 362.13g in sequence; injecting water into the 5 groups of chromatographic columns through peristaltic pumps until the columns are in a water saturation state, wherein the mass of the chromatographic columns after water saturation is 353.92g, 370.34g, 373.52g, 382.31g and 400.00g respectively; the chromatographic column after saturation with water seals both ends, water in the column is replaced by a peristaltic pump every 24 hours, water at the outlet end is subjected to pH detection, and a pH change condition diagram of the acidic red soil and the steel slag particles under different mass mixing ratios is drawn.
As shown in fig. 4, each set of pH changes showed an upward trend due to the reaction not reaching equilibrium. In the existing monitoring data, under 5 groups of mixing ratios with different mass, the alkaline release of the steel slag particles is inhibited to different degrees, and the acid red soil: the steel slag particles are 2: the group control effect of 1 is better, but the overall effect is inferior to that of acidic humus soil. Wherein the acid red soil: the steel slag particles are 2: the pH of group 1 is lowest, currently 7.60, while the acidic red soil: the steel slag particles are 1: the group pH of 3 is highest, currently 11.73, but still below the initial pH of the steel slag. Similarly, the red soil can also reduce the alkalinity of the steel slag and promote the possibility of the steel slag as a microbial film carrier, the red soil can be used as a good carrier for the growth of microorganisms, and the mixture of the red soil and the red soil promotes the effect of the steel slag on water purification and is also beneficial to playing a better purification role in water ecological restoration of the steel slag.
Example 5
The method for controlling the alkaline release and the resource utilization of the steel slag comprises the following steps:
(1) Crushing by a slag crusher, screening the crushed steel slag, and selecting the steel slag with the grain diameter of 3-5 mm to obtain steel slag particles;
(2) Acid peat soil, acid red soil and steel slag particles are mixed according to the mass ratio of 1:1:1, uniformly mixing, controlling the alkaline release of the steel slag and recycling to obtain the water purifying material.
The water purification material of this example was packed into a column having an inner diameter of 3.6cm and a length of 20cm, and a hollow column having a mass of 256.00g and a mass of 442.00g after the mixture was packed. The chromatographic column is filled with water through a peristaltic pump until the chromatographic column is in a water saturation state, and the mass of the chromatographic column after water saturation is 514.63g. The peristaltic rotational speed is adjusted to control the hydraulic retention time to 5h. And collecting water samples from the water outlet end every 24 hours for pH detection, and drawing a pH change condition chart.
As shown in figure 5, after the acidic humus soil and the acidic red soil are added, the alkaline release of the steel slag particles is inhibited to a certain extent, and the pH value of the water sample is 9.75.
The results show that the method for controlling the alkaline release and recycling of the steel slag provided by the invention can obviously inhibit the alkaline release of the steel slag by adopting the mixed reaction of the acidic humus soil, the acidic red soil and the steel slag. The invention utilizes the acid soil which is a natural and cheap resource as a substance for inhibiting alkaline release, can solve the problem of environmental pollution caused by excessive stacking of the steel slag, is economical and environment-friendly, does not produce secondary pollution, has cheap and easily available raw materials, can develop the capability of the steel slag as a biological film-forming carrier for water environment treatment, and improves the capability of the steel slag for recycling.
Example 6
The method for controlling the alkaline release and the resource utilization of the steel slag comprises the following steps:
(1) Crushing by a slag crusher, screening the crushed steel slag, and selecting the steel slag with the grain diameter of 1-10 mm to obtain steel slag particles;
(2) Mixing the steel slag particles with acidic humus soil according to a mass ratio of 3:1, uniformly mixing, controlling the alkaline release of the steel slag and recycling to obtain the corresponding water purifying material.
Example 7
The method for controlling the alkaline release and the resource utilization of the steel slag comprises the following steps:
(1) Crushing by a slag crusher, screening the crushed steel slag, and selecting the steel slag with the grain diameter of 1-50 mm to obtain steel slag particles;
(2) Mixing the steel slag particles with acidic humus soil according to a mass ratio of 1:5, uniformly mixing, controlling the alkaline release of the steel slag and recycling to obtain the corresponding water purifying material.
Example 8
The method for controlling the alkaline release and the resource utilization of the steel slag comprises the following steps:
(1) Crushing by a slag crusher, screening the crushed steel slag, and selecting the steel slag with the grain diameter of 3-5 mm to obtain steel slag particles;
(2) Mixing the steel slag particles with acid red soil according to a mass ratio of 10:1, uniformly mixing, controlling the alkaline release of the steel slag and recycling to obtain the corresponding water purifying material.
Example 9
The method for controlling the alkaline release and the resource utilization of the steel slag comprises the following steps:
(1) Crushing by a slag crusher, screening the crushed steel slag, and selecting the steel slag with the grain diameter of 3-5 mm to obtain steel slag particles;
(2) Uniformly mixing acidic humus soil, acidic red soil and the steel slag particles, wherein the mass ratio of the acidic humus soil to the steel slag particles is 3:1, the mass ratio of the acid red soil to the steel slag particles is 5:1, controlling the alkaline release of the steel slag and recycling to obtain the corresponding water purifying material.
Example 10
The method for controlling the alkaline release and the resource utilization of the steel slag comprises the following steps:
(1) Crushing by a slag crusher, screening the crushed steel slag, and selecting the steel slag with the grain diameter of 3-5 mm to obtain steel slag particles;
(2) Uniformly mixing acidic humus soil, acidic red soil and the steel slag particles, wherein the mass ratio of the acidic humus soil to the steel slag particles is 1:10, the mass ratio of the acid red soil to the steel slag particles is 1: and 3, controlling the alkaline release of the steel slag and recycling to obtain the corresponding water purifying material.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (9)
1. The method for controlling the alkaline release and the recycling of the steel slag is characterized by comprising the following steps of:
(1) The steel slag is crushed and sieved to obtain steel slag particles;
(2) And uniformly mixing the steel slag particles with the acid soil in proportion, controlling the alkaline release of the steel slag and recycling the steel slag to obtain the water purifying material.
2. The method according to claim 1, characterized in that: in the step (1), the grain size of the steel slag particles is between 1 and 50 mm.
3. The method according to claim 1, characterized in that: in the step (2), the acid soil is at least one of acid humus soil and acid red soil.
4. A method according to claim 3, characterized in that: the pH value of the acidic humus soil is less than 6.0; the pH value of the acidic red soil is less than 5.0.
5. A method according to claim 3, characterized in that: when the acid soil adopts acid humus soil, the mass ratio of the acid humus soil to the steel slag particles is 0.2-3: 1.
6. a method according to claim 3, characterized in that: when the acid soil adopts acid red soil, the mass ratio of the acid humus soil to the steel slag particles is 0.5-10: 1.
7. a method according to claim 3, characterized in that: when the acid soil adopts acid humus soil and acid red soil at the same time, the mass ratio of the acid humus soil to the steel slag particles is 0.1-3: 1, the mass ratio of the acid red soil to the steel slag particles is 1-15: 3.
8. a water purification material, characterized in that: a method according to any one of claims 1 to 7.
9. Use of the water purification material according to claim 8 as a filtering substance in purifying a body of water.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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