CN110885686A - Soil conditioner and preparation method thereof - Google Patents
Soil conditioner and preparation method thereof Download PDFInfo
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- CN110885686A CN110885686A CN201911020806.6A CN201911020806A CN110885686A CN 110885686 A CN110885686 A CN 110885686A CN 201911020806 A CN201911020806 A CN 201911020806A CN 110885686 A CN110885686 A CN 110885686A
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- iron ore
- dolomite
- soil conditioner
- mica
- tailings
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/08—Aluminium compounds, e.g. aluminium hydroxide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention discloses a soil conditioner and a preparation method thereof, relating to the technical field of soil remediation, wherein mica and dolomite are mixed according to the weight ratio of 1:1, and mixing and calcining for 1 hour at 1200 ℃ to obtain a soil conditioner E; or mixing and calcining the iron ore tailings, the mica and the dolomite at the weight ratio of 1:1.5:2.5 for 1 hour at 1100 ℃ to obtain a soil conditioner G; through the reuse to the discarded object iron ore tailing of ore factory production for discarded iron ore tailing obtains the soil conditioner that can improve soil through processing, can effectual environmental protection and prevent the pollution of tailing to the nature, has energy-concerving and environment-protective effect, can also increase the income of enterprise, is favorable to manufacturing cost's reduction.
Description
Technical Field
The invention relates to the technical field of soil remediation, in particular to a soil conditioner and a preparation method thereof.
Background
Soil is the foundation required for crop growth. Although the width of people in China is huge, the number of people is huge, the arable area is limited, the food safety is crucial to the national stability, at present, the arable land in China mainly faces the problems of soil acidification, heavy metal pollution, nutrient imbalance, fertility reduction and the like, and the influence on agriculture is increasingly serious; although the chemical fertilizer still plays a main role in increasing both production and income of agriculture, the problems of soil hardening, salinization and acidification caused by long-term large-scale application, environmental pollution caused by the fact that unabsorbed parts enter water bodies to diffuse and the like cannot be ignored.
Tailings obtained after the ore dressing and purification of the iron ore are industrial wastes, the discharge amount is large, and a large amount of the tailings are accumulated, so that the land is occupied, and potential safety hazards and environmental pollution are easily caused; the tailings often contain beneficial medium and trace elements required by crop growth, such as silicon, calcium, magnesium, potassium and the like; the method for preparing the soil conditioner rich in beneficial elements required by plant growth by using the tailings is a research route for changing waste into valuable, has important great promotion effect on comprehensive utilization of the tailings and development of soil fertilizer improving technology and industry, and has great social significance and economic benefit, so the method aims to prepare the soil conditioner, wherein the active element index K is2O≥2%，SiO2≥18%，CaO≥15%，MgO≥3%。
Disclosure of Invention
The technical problem to be solved by the invention is to provide a soil conditioner and a preparation method thereof, so as to solve the defects in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a soil conditioner comprises the following raw material components,
the component A comprises: the mica is obtained by flotation of iron ore tailings, and comprises the following components in percentage by weight: 81% of muscovite, about 11% of nickel green mud stone and 8% of quartz;
and B component: the dolomite is an associated product in the process of mining iron ore, and comprises the following components in percentage by weight: 62% of dolomite, 13% of biotite, 11% of calcite, 5% of vermiculite and 9% of actinolite.
Preferably: the composition also comprises a component C, wherein the component C is iron ore tailings and is composed of tailings obtained by mineral separation of iron ore in a mineral plant, and the iron ore tailings comprise the following components in percentage by weight: 56% of quartz, 17% of hematite, 8% of nickel chlorite, 8% of dolomite, 6% of mica and 5% of tremolite.
The invention also provides a preparation method of the soil conditioner, which comprises the following steps:
(1) pouring the iron ore tailings into a flotation machine, and then obtaining mica through the flotation machine for later use;
(2) crushing associated dolomite in a crusher during iron ore mining, and grinding the crushed dolomite into powder by a grinder for later use;
(3) mixing mica obtained by flotation and powdery dolomite according to the weight ratio of 1:1 to obtain a mixture D for later use;
(4) and putting the mixture D into a crucible, then putting the crucible into a static furnace for calcination, wherein the calcination temperature is 1100-1200 ℃, the calcination time is 0.5-1.5 hours, and then taking out the crucible and naturally cooling to room temperature to obtain the soil conditioner E.
The invention also provides a preparation method of another soil conditioner, which is characterized by comprising the following steps:
(1) pouring the iron ore tailings into a flotation machine, and then obtaining mica through the flotation machine for later use;
(2) crushing associated dolomite in a crusher during iron ore mining, and grinding the crushed dolomite into powder by a grinder for later use;
(3) firstly, the tailings obtained by the iron ore plant through the mineral processing industry are divided, and the divided iron ore tailings are put into a grinder to be ground into powder for later use;
(4) mixing the mica obtained by flotation, the dolomite ground into powder and the iron ore tailings ground into powder according to the weight ratio of 1.5:2.5:1 to obtain a mixture F for later use;
(5) and putting the mixture F into a crucible, then putting the crucible into a static furnace for calcination, wherein the calcination temperature is 1000-1100 ℃, the calcination time is 0.5-1.5 hours, and then taking out the crucible and naturally cooling to room temperature to obtain the soil conditioner G.
The beneficial effect of adopting above technical scheme is:
1. the method comprises the steps of mixing mica generated in the process of producing refined iron ore in an iron ore plant and dolomite associated with mining iron ore in a proper proportion, calcining at high temperature, and calcining to obtain the soil conditioner E, wherein the mass percentages of the components are active SiO225.45%, active CaO17.89% and active K25.48 percent of O and 10.94 percent of active MgO10; to obtainThe soil conditioner with higher active elements is obtained.
2. In order to improve the utilization rate of the iron ore tailings, the iron ore tailings are mixed with mica and dolomite according to a certain proportion, and the mixture is calcined at high temperature to obtain a soil conditioner G, wherein the mass percentage of each component is as follows: active SiO218.04%, active K2O2.17%, active CaO16.33%, active MgO12.9%;
3. by recycling the iron ore tailings, the mica and the dolomite, the environmental protection problem caused by the waste tailings is solved, and the soil conditioner for improving the soil property is obtained, so that the production selection of enterprises is more diversified.
Detailed Description
The invention is further illustrated by the following specific examples.
Example one
The soil conditioner of the embodiment comprises the following raw material components,
the component A comprises: the mica is obtained by flotation of iron ore tailings, and comprises the following components in percentage by weight: 81% of muscovite, about 11% of nickel green mud stone and 8% of quartz;
and B component: the dolomite is an associated product in the process of mining iron ore, and comprises the following components in percentage by weight: 62% of dolomite, 13% of biotite, 11% of calcite, 5% of vermiculite and 9% of actinolite.
The preparation method of the soil conditioner of the embodiment comprises the following steps:
(1) pouring the iron ore tailings into a flotation machine, and then obtaining mica through the flotation machine for later use;
(2) crushing associated dolomite in a crusher during iron ore mining, and grinding the crushed dolomite into powder by a grinder for later use;
(3) mixing mica obtained by flotation and powdery dolomite according to the weight ratio of 1:1 to obtain a mixture D for later use;
(4) and putting the mixture D into a crucible, then putting the crucible into a static furnace for calcining at 1200 ℃ for 1 hour, and then taking out the crucible and naturally cooling to room temperature to obtain the soil conditioner E.
Comparison of experimental data for this example:
experiment 1, mixing mica and dolomite, calcining and activating at 1200 ℃, 1100 ℃ and 1000 ℃ for 2h, and examining the activation effect under different proportions, the results are shown in the following table 1-1:
TABLE 1-1 activation test for mixtures of mica and dolomite
As can be seen from the results of Table 1-1: at 1200 deg.C, when the ratio of mica to dolomite is 1:1, the active SiO in the calcined product2The content is relatively highest, reaching 25.45%, the conversion rate is 75.04%, and the preset target (active SiO) is reached2Not less than 18 percent), the dolomite proportion is continuously increased, the conversion rate can be further increased, but the active SiO in the product2The content is not changed greatly; in addition, when the proportion of dolomite is higher (more than or equal to 50 percent), the increase of the calcining temperature is beneficial to SiO2Activation of (2) active SiO in the product calcined at 1200 deg.C2The product with the content obviously higher than 1100 ℃ and 1000 ℃ is seen, and 1200 ℃ is a relatively proper activation temperature.
Experiment 2, mixing mica with dolomite, calcining and activating at 1100 ℃ for 0.5h, 1h and 1.5h, and examining the activating effect, the results are shown in the following table 1-2:
TABLE 1-2 Effect of calcination time on activation Effect
As can be seen from the results in tables 1-2, the content of each active element in the product increases with the increase of the calcination time, and the content of each active element is substantially stabilized when the calcination time reaches 1 h.
Example two
The soil conditioner of the embodiment is added with the component C on the basis of the A, B component of the embodiment I, the raw material components are as follows,
the component A comprises: the mica is obtained by flotation of iron ore tailings, and comprises the following components in percentage by weight: 81% of muscovite, about 11% of nickel green mud stone and 8% of quartz;
and B component: the dolomite is an associated product in the process of mining iron ore, and comprises the following components in percentage by weight: 62% of dolomite, 13% of biotite, 11% of calcite, 5% of vermiculite and 9% of actinolite;
and C, component C: the component C is iron ore tailings and is composed of tailings of iron ore subjected to mineral processing in an ore plant, and the iron ore tailings comprise the following components in percentage by weight: 56% of quartz, 17% of hematite, 8% of nickel chlorite, 8% of dolomite, 6% of mica and 5% of tremolite.
The preparation method of the soil conditioner of the embodiment comprises the following steps:
(1) pouring the iron ore tailings into a flotation machine, and then obtaining mica through the flotation machine for later use;
(2) crushing associated dolomite in a crusher during iron ore mining, and grinding the crushed dolomite into powder by a grinder for later use;
(3) firstly, the tailings obtained by the iron ore plant through the mineral processing industry are divided, and the divided iron ore tailings are put into a grinder to be ground into powder for later use;
(4) mixing the mica obtained by flotation, the dolomite ground into powder and the iron ore tailings ground into powder according to the weight ratio of 1.5:2.5:1 to obtain a mixture F for later use;
(5) and putting the mixture F into a crucible, then putting the crucible into a static furnace for calcining at 1100 ℃ for 1 hour, and then taking out the crucible and naturally cooling to room temperature to obtain the soil conditioner G.
Comparison of experimental data for this example:
experiment 1, mixing iron ore tailings, mica and dolomite, calcining and activating at 1200 ℃, 1100 ℃ and 1000 ℃ for 2 hours, and investigating the activation effect under different proportions, wherein the activation effects are shown in the following tables 2-1, 2-2 and 2-3:
TABLE 2-1 activation test 1200 deg.C for the blends
Table 2-2 activation test of mix 1100 deg.c
TABLE 2-3 activation test of blends 1000 deg.C
As can be seen from tables 2-1 to 2-3: calcining for 2 hours at 1100 ℃, wherein when the ratio of the iron ore tailings/mica/dolomite is 1:1.5:2.5, the content of active SiO2 in the calcined product is relatively highest, the preset target is achieved, the conversion rate is about 55%, and 1100 ℃ is a relatively suitable activation temperature.
Experiment 2, mixing mica with dolomite, calcining and activating at 1100 ℃ for 0.5h, 1h and 1.5h, and examining the activating effect, the results are shown in the following tables 2-4:
TABLE 2-4 influence of particle size and calcination time on activation effect 1100 deg.C
From tables 2-4, it can be seen that: compared with the ground fine particle material, under the same raw material proportion and calcination conditions, when the coarse particle tailings are directly activated, the active SiO in the product2The content is obviously lower, which shows that the influence of the particle size on the calcination reaction is obvious.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (4)
1. The soil conditioner comprises the following raw material components:
the component A comprises: the mica is obtained by flotation of iron ore tailings, and comprises the following components in percentage by weight: 81% of muscovite, about 11% of nickel green mud stone and 8% of quartz;
and B component: the dolomite is an associated product in the process of mining iron ore, and comprises the following components in percentage by weight: 62% of dolomite, 13% of biotite, 11% of calcite, 5% of vermiculite and 9% of actinolite.
2. A soil conditioner according to claim 1, wherein: the composition also comprises a component C, wherein the component C is iron ore tailings and is composed of tailings obtained by mineral separation of iron ore in a mineral plant, and the iron ore tailings comprise the following components in percentage by weight: 56% of quartz, 17% of hematite, 8% of nickel chlorite, 8% of dolomite, 6% of mica and 5% of tremolite.
3. The method for preparing a soil conditioner according to claim 1, which comprises the following steps:
(1) pouring the iron ore tailings into a flotation machine, and then obtaining mica through the flotation machine for later use;
(2) crushing associated dolomite in a crusher during iron ore mining, and grinding the crushed dolomite into powder by a grinder for later use;
(3) mixing mica obtained by flotation and powdery dolomite according to the weight ratio of 1:1 to obtain a mixture D for later use;
(4) and putting the mixture D into a crucible, then putting the crucible into a static furnace for calcination, wherein the calcination temperature is 1100-1200 ℃, the calcination time is 0.5-1.5 hours, and then taking out the crucible and naturally cooling to room temperature to obtain the soil conditioner E.
4. The method for preparing a soil conditioner according to claim 2, which comprises the following steps:
(1) pouring the iron ore tailings into a flotation machine, and then obtaining mica through the flotation machine for later use;
(2) crushing associated dolomite in a crusher during iron ore mining, and grinding the crushed dolomite into powder by a grinder for later use;
(3) firstly, the tailings obtained by the iron ore plant through the mineral processing industry are divided, and the divided iron ore tailings are put into a grinder to be ground into powder for later use;
(4) mixing the mica obtained by flotation, the dolomite ground into powder and the iron ore tailings ground into powder according to the weight ratio of 1.5:2.5:1 to obtain a mixture F for later use;
(5) and putting the mixture F into a crucible, then putting the crucible into a static furnace for calcination, wherein the calcination temperature is 1000-1100 ℃, the calcination time is 0.5-1.5 hours, and then taking out the crucible and naturally cooling to room temperature to obtain the soil conditioner G.
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| CN111560251A (en) * | 2020-04-23 | 2020-08-21 | 华南师范大学 | Soil conditioner prepared from solid waste and preparation method and application thereof |
| CN116355615A (en) * | 2023-04-04 | 2023-06-30 | 黄河水利委员会黄河水利科学研究院 | Heavy metal passivator of muscovite-based supported magnesium and preparation method and application thereof |
| CN116376555A (en) * | 2023-04-04 | 2023-07-04 | 黄河水利委员会黄河水利科学研究院 | White mica-based calcium-magnesium loaded heavy metal passivator and preparation method and application thereof |
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| CN116376555A (en) * | 2023-04-04 | 2023-07-04 | 黄河水利委员会黄河水利科学研究院 | White mica-based calcium-magnesium loaded heavy metal passivator and preparation method and application thereof |
| CN116376555B (en) * | 2023-04-04 | 2023-11-24 | 黄河水利委员会黄河水利科学研究院 | White mica-based calcium-magnesium loaded heavy metal passivator and preparation method and application thereof |
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