CN111690416B - Method for producing novel soil conditioning functional material by utilizing industrial solid waste - Google Patents
Method for producing novel soil conditioning functional material by utilizing industrial solid waste Download PDFInfo
- Publication number
- CN111690416B CN111690416B CN202010589877.4A CN202010589877A CN111690416B CN 111690416 B CN111690416 B CN 111690416B CN 202010589877 A CN202010589877 A CN 202010589877A CN 111690416 B CN111690416 B CN 111690416B
- Authority
- CN
- China
- Prior art keywords
- functional material
- soil conditioning
- capsule
- area
- novel soil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D1/00—Fertilisers containing potassium
- C05D1/02—Manufacture from potassium chloride or sulfate or double or mixed salts thereof
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/40—Fertilisers incorporated into a matrix
-
- 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
- C09K2101/00—Agricultural use
-
- 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
- C09K2105/00—Erosion prevention
-
- 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
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a method for producing a novel soil conditioning functional material by using industrial solid waste, which comprises the following steps: (1) mixing: mixing industrial solid waste, an adhesive and an acid-base regulating material, and performing high-speed strong mechanical mixing to obtain a mixture; the adhesive is composed of bentonite, corn dextrin and plant roots and stems; the acid-base adjusting material comprises an acidic material and a basic material; (2) molding: pressing the mixture prepared in the step (1) into capsule-shaped particles by using a powerful ball press; (3) reduction roasting: and (3) carrying out reduction roasting on the capsule-shaped particles obtained in the step (2) by adopting a mineral roasting reduction device to obtain the novel soil regulation functional material. The invention adopts industrial solid wastes as raw materials, not only can effectively solve the treatment problem of the industrial solid wastes, but also the produced novel soil conditioning functional material has magnetism, has a good pore structure inside, has strong magnetic agglomeration and can play a good soil conditioning function.
Description
Technical Field
The invention relates to the field of environmental protection and agriculture, in particular to soil treatment, restoration and improvement, and more particularly relates to a method for producing a novel soil conditioning functional material by using industrial solid wastes.
Background
Industrial solid waste refers to solid waste produced in industrial production. The long-term industrial solid waste stockpiling not only occupies a large amount of land, but also can cause serious pollution to water systems, soil and atmosphere. For example, after long-term stockpiling of industrial solid wastes, soluble components permeate from the ground surface downwards along with water after rain and snow leaching and migrate and convert to soil, so that soil near a yard is acidified, alkalized or hardened.
Novel soil conditioning functional materials are products for conditioning soil, mainly for those soils that suffer from nutrient loss due to overuse or contamination. At present, soil conditioners are various in products, but the purpose of conditioning soil is achieved by adjusting the pH value of the soil through substances such as fly ash and limestone, and some soil conditioners can also be used for simply mixing substance components such as diammonium phosphate and potassium dihydrogen phosphate to provide nutrient elements for the soil. The soil conditioner is high in preparation cost, and the soil improvement effect is to be further improved.
Disclosure of Invention
Based on the technical problems, the invention provides a method for producing a novel soil conditioning functional material by using industrial solid waste.
The technical solution adopted by the invention is as follows:
a method for producing a novel soil conditioning functional material from industrial solid waste, comprising the steps of:
(1) mixing
Mixing industrial solid waste, an adhesive and an acid-base adjusting material, and mechanically blending to obtain a blending material;
the using amount ratio of the industrial solid waste to the adhesive is 90-95: 3-7 in parts by weight;
the adhesive is composed of bentonite, corn dextrin and plant roots and stems, wherein the dosage ratio of the bentonite to the corn dextrin to the plant roots and stems is 3-5: 1-3 in parts by weight;
the acid-base adjusting material comprises an acidic material and a basic material;
(2) shaping of
Pressing the mixture prepared in the step (1) into capsule-shaped particles by using a powerful ball press;
(3) reduction roasting
And (3) reducing and roasting the capsule-shaped particles obtained in the step (2) by adopting a mineral roasting reduction device, and specifically comprising the following steps:
(31) starting an automatic sealing device of the feeding area to enable the capsule-shaped particles to enter a drying preheating area through the feeding area;
(32) starting the directional pressurizing device to enable the gas-phase combustion agent provided by the combustion agent adding device and the gas-phase reducing agent provided by the reducing agent adding device to move upwards under the pumping action of the directional pressurizing device;
(33) preheating the capsule-shaped particles by a gas-phase combustion agent and a reducing agent in a drying preheating zone, then slowly descending the capsule-shaped particles under the action of self gravity and air pressure, and passing through a roasting oxidation reaction zone, a pressure regulating zone and a reduction reaction zone;
(34) the roasting oxidation reaction zone is a negative pressure zone, and the pressure range is controlled to be P0-300Pa～P0-4000Pa，P0The temperature is 750-1250 ℃, mineral molecules in the capsule-shaped particles are in an active state under the control of pressure and temperature, and meanwhile, crystal water, capillary water, gaseous and liquid substances in the capsule-shaped particles are removed to form a honeycomb pore structure in the capsule-shaped particles;
(35) controlling the opening number of the pressure regulating air doors of the pressure regulating area to ensure that the reduction reaction area is a positive pressure area and the pressure range of the reduction area is controlled to be P0+300Pa～P0+4000Pa，P0Under the atmospheric pressure and the temperature range of 750-1250 ℃, in the reduction zone, the mineral molecules in the capsule-shaped particles and reducing agent molecules perform oxidation-reduction reaction in a high-activity state, and the valence state of the mineral is essentially changed;
(36) and discharging the capsule-shaped particles reduced in the reduction reaction zone into a water seal cooling zone through a discharge zone, controlling the temperature range of the water seal cooling zone to be 50-80 ℃, and discharging the capsule-shaped particles after the capsule-shaped particles are cooled and stabilized in the water seal cooling zone to obtain the novel soil conditioning functional material.
Preferably, the industrial solid waste comprises mineral processing tailings, blast furnace slag, steel slag, red mud, non-ferrous slag, fly ash, coal slag, sulfuric acid slag, waste gypsum, desulfurized fly ash, carbide slag and salt slurry.
Preferably, the acidic material is selected from organic acid, inorganic acid or their corresponding salts, the inorganic acid includes hydrochloride, sulfate and nitrate, specifically calcium chloride, calcium sulfate, calcium nitrate, etc., and the alkaline material is selected from sodium ion (such as sodium hydroxide) or hydrated lime, etc.
Preferably, when the industrial solid waste is red mud, the acid-base adjusting material is acid mineral, wherein the weight part ratio of the red mud, the adhesive and the acid mineral is 92: 5: 3, and the weight part ratio of the bentonite, the corn dextrin and the plant rhizome in the adhesive is 3: 1.
The acidic mineral can be selected from sulfuric acid residue or acid mud, such as acid mud formed by electrolyzing copper, aluminum, stainless steel, etc.
A method for producing a novel soil conditioning functional material from industrial solid waste, the method further comprising the steps of:
(4) synthesis of
Selecting any one or combination of more than two of diammonium phosphate, urea, ammonium bicarbonate, ammonium nitrate, calcium superphosphate, potassium chloride and potassium dihydrogen phosphate to prepare a solution;
soaking the prepared novel soil conditioning functional material in the solution, and then taking out; or spraying the solution on the prepared novel soil conditioning functional material through a nozzle;
(5) drying by baking
And (3) drying the novel soil conditioning functional material soaked in the solution or the novel soil conditioning functional material sprayed with the solution at 50-60 ℃ to obtain the composite novel soil conditioning functional material.
Preferably, the method also comprises a step of magnetizing the novel soil conditioning functional material, wherein the novel soil conditioning functional material soaked in the solution or the novel soil conditioning functional material sprayed with the solution is magnetized when being dried or after being dried and placed in a magnetic field environment.
The magnetic field environment can be generated through an electromagnetic induction coil and the like, and if the electromagnetic induction coil is arranged on the periphery of the section body of the drying conveying belt, the novel soil adjusting functional material is magnetized in the drying process. Of course, other magnetic devices such as magnetic pulleys and the like may be used. The magnetic strength in the magnetic field environment can be 5000 gauss-20000 gauss, and the soil conditioning functional material to be magnetized is placed in the strong magnetic field environment for 2-10 min.
Preferably, the novel soil conditioning functional material is soaked in the solution for 30 to 60 minutes.
Preferably, the capsule-shaped particles are special-shaped particles, such as flat capsules with oval cross sections, and the like, and have the advantages of easy thorough burning during later reduction roasting and the like.
The beneficial technical effects of the invention are as follows:
the invention adopts industrial solid wastes as raw materials to produce the novel soil conditioning functional material, which not only can effectively solve the treatment problem of the industrial solid wastes, but also has three soil conditioning performances of water retention, fertility enhancement and air permeability. Due to the functional characteristics of the material, the soil hardening and loosening can be broken, the soil permeability can be improved, the soil volume weight can be reduced, the soil microbial activity can be promoted, the soil fertilizer water permeability can be enhanced, the active absorption of soil mineral elements can be increased, the soil magnetic field environment can be changed, the soil wind erosion can be prevented, the heavy metal pollution can be treated, and the acid-base salt soil can be treated; therefore, the soil conditioning functional material has the functions of repairing and improving soil, treating desert, treating saline-alkali soil, retaining water and resisting drought, enhancing the disease resistance of crops, improving the yield of the crops, improving the quality of agricultural products, recovering the original ecology of the crops and the like, and greatly improves the survival rate of tree planting and the yield of the agricultural products; improve the quality of agricultural and forestry products and restore the natural appearance of the agricultural and forestry products.
In the invention, when the raw materials are mixed, bentonite, corn dextrin, plant roots and stems and the like with proper dosage are added as the adhesive, the adhesive not only can play a role of adhesion and is convenient for pressing into balls, but also can form a good lattice pore structure along with the removal of crystal water, capillary water, gaseous and liquid substances in the subsequent roasting reduction process.
The novel soil conditioning functional material has magnetism and an excellent pore structure, and mineral molecules in the material have valence state activity and change mineral crystal forms through a roasting reduction water quenching process, so that the soil conditioning effect is good.
The novel soil conditioning functional material prepared by the invention can be attached with fertilizers such as nitrogen, phosphorus, potassium and the like through the processes of soaking, spraying and magnetizing to obtain the composite novel soil conditioning functional material, the functional material can activate soil, so that certain nutrients which cannot be absorbed by crops in the soil are converted into absorbable nutrients, meanwhile, the formation of a micro-cluster particle structure in the soil is facilitated, the air permeability and the water and fertilizer retention capacity of the soil are enhanced, the magnetic field environment of the soil is changed, and the growth and development of the crops are facilitated.
The novel soil conditioning functional material prepared by the invention adopts industrial solid wastes, corn dextrin, plant roots and stems and the like as raw materials, the preparation cost is low, the prepared novel soil conditioning functional material can be further attached with fertilizers such as nitrogen, phosphorus, potassium and the like through soaking, spraying and magnetizing processes, and can be further placed in a magnetic field environment for magnetizing to enhance the magnetic susceptibility of the fertilizers, so that different types of composite novel soil conditioning functional materials are obtained, and the preparation method is flexible and novel.
Drawings
The invention will be further described with reference to the following detailed description and drawings:
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic view of the structure of a mineral roasting reduction apparatus used in the reduction roasting step of the present invention.
Detailed Description
Example 1
A method for producing a novel soil conditioning functional material from industrial solid waste, comprising the steps of:
(1) mixing
Selecting red mud, adhesive and acid mineral as raw materials, mixing the red mud, the adhesive and the acid mineral according to the weight ratio of 92: 5: 3, and performing high-speed strong mechanical mixing to obtain a mixture. Wherein the adhesive is composed of bentonite, corn dextrin and plant rhizome, and the weight part ratio of the bentonite, the corn dextrin and the plant rhizome is 3: 1. The acid mineral can be selected from sulfate slag or acid mud.
(2) Shaping of
And (3) pressing the mixture prepared in the step (1) into capsule-shaped particles by using a powerful ball press machine, wherein the pressure of the ball press machine is 500 MPa.
(3) Reduction roasting
And (3) roasting and reducing the capsule-shaped particles obtained in the step (2) by adopting a mineral roasting and reducing device, wherein the mineral roasting and reducing device comprises a feeding area 1, a drying and preheating area 2, a roasting and oxidizing reaction area 3, a pressure regulating area 4, a reducing reaction area 5, a discharging area 6 and a water seal cooling area 7 which are sequentially arranged from top to bottom and are mutually communicated. A No. 1 automatic sealing device 8 and a No. 2 automatic sealing device 9 are sequentially arranged above and below the feeding area 1. And a directional pressurizing device is arranged at the upper part of the drying and preheating zone 2 and is used for vacuumizing. A first layer of burning agent adding device 10 and a second layer of burning agent adding device 11 are sequentially arranged above and below the periphery of the roasting oxidation reaction zone 3 and are used for providing burning agents. Mineral turnover devices are arranged in the drying preheating zone 2, the roasting oxidation reaction zone 3 and the reduction reaction zone 5. A plurality of pressure regulating air doors are arranged on the side wall of the pressure regulating area 4. A reducing agent adding device is provided at a lower portion of the reduction reaction zone 5, and the reducing agent adding device is used to supply a reducing agent. An automatic ore discharging device is arranged in the discharging area 6. A water quenching cooling device is arranged in the water seal cooling area 7.
The reduction roasting of the capsule-shaped particles comprises the following steps:
(31) starting an automatic sealing device of the feeding area to enable the capsule-shaped particles to enter the drying preheating area through the feeding area.
(32) And starting the directional pressurizing device to enable the gas-phase combustion agent provided by the combustion agent adding device and the gas-phase reducing agent provided by the reducing agent adding device to move upwards under the pumping action of the directional pressurizing device.
(33) Preheating the capsule-shaped particles by a gas-phase combustion agent and a reducing agent in a drying and preheating zone, then slowly descending the capsule-shaped particles under the action of self gravity and air pressure, and passing through a roasting oxidation reaction zone, a pressure regulating zone, a reduction reaction zone and water quenching.
(34) The roasting oxidation reaction zone is a negative pressure zone, and the pressure range is controlled to be P0-300Pa～P0-4000Pa，P0The temperature is 750-1250 deg.C under atmospheric pressure, mineral molecules in the capsule-shaped particles are in active state under the control of pressure and temperature, and simultaneously crystal water, capillary water, gas state and liquid state substances in the capsule-shaped particles are removed to form honeycomb in the capsule-shaped particlesA porous structure.
(35) Controlling the opening number of the pressure regulating air doors of the pressure regulating area to ensure that the reduction reaction area is a positive pressure area and the pressure range of the reduction area is controlled to be P0+300Pa～P0+4000Pa，P0The temperature is 750-1250 ℃, in the reduction zone, the mineral molecules in the capsule-shaped particles and the reducing agent molecules are subjected to oxidation-reduction reaction in a high active state, and the valence state of the mineral is essentially changed.
(36) And discharging the capsule-shaped particles reduced in the reduction reaction zone into a water seal cooling zone through a discharge zone, controlling the temperature range of the water seal cooling zone to be 50-80 ℃, and discharging the capsule-shaped particles after the capsule-shaped particles are cooled and stabilized in the water seal cooling zone to obtain the novel soil conditioning functional material.
Example 2
The preparation method is different from the example 1 in that: the fly ash, the adhesive and the oxalic acid are selected as raw materials, the weight part ratio of the fly ash, the adhesive and the oxalic acid is 95: 3: 2, wherein the adhesive is composed of bentonite, corn dextrin and plant roots and stems, and the weight part ratio of the bentonite, the corn dextrin and the plant roots and stems is 3: 1: 2.
Example 3
The preparation method is different from the example 1 in that: mixing the sulfuric acid residue, the adhesive and the hydrated lime according to the weight part ratio of 95: 3: 5; the weight portion ratio of the bentonite, the corn dextrin and the plant rhizome in the adhesive is 3: 2: 1.
Example 4
Diammonium phosphate and ammonium bicarbonate are selected as raw materials to prepare a solution. The weight ratio of the diammonium phosphate to the ammonium bicarbonate is 1: 1, and the mass percentage concentration of the diammonium phosphate and the ammonium bicarbonate in the solution is 35 percent.
The novel soil conditioning functional material prepared in example 1 was soaked in the above solution for 30 minutes, and then taken out and dried at 60 ℃ to obtain a composite novel soil conditioning functional material.
Example 5
Potassium chloride is selected as a raw material to prepare a solution. The mass percentage concentration of potassium chloride in the solution is 40%. The novel soil conditioning functional material prepared in example 2 was soaked in the above solution for 40 minutes, and then taken out and dried at 60 ℃ to obtain a composite novel soil conditioning functional material.
Example 6
Diammonium phosphate and ammonium bicarbonate are selected as raw materials to prepare a solution. The weight ratio of the diammonium phosphate to the ammonium bicarbonate is 1: 1, and the mass percentage concentration of the diammonium phosphate and the ammonium bicarbonate in the solution is 35 percent.
The novel soil conditioning functional material prepared in example 1 was soaked in the above solution for 30 minutes, then taken out, dried at 60 ℃, and then placed in a strong magnetic field environment of 5000 gauss for 2 minutes to obtain a composite novel soil conditioning functional material.
Test verification
1. The novel soil conditioning functional material prepared in example 1, example 2 and example 3 and the existing commercially available soil conditioner were added to cadmium contaminated farmland soil in a mass fraction of 0.1%, and after being mixed uniformly and left standing for one week, the content of available cadmium in the soil was measured, and the results are shown in table 1 below.
TABLE 1
According to the results in table 1, the novel soil conditioning functional material of the present invention can effectively reduce the content of heavy metal ion cadmium in the original soil, and has better effect than the existing soil conditioner.
2. Selecting the composite novel soil conditioning functional material prepared in the example 4 and urea to mix according to the weight ratio of 1: 1, and calculating the mixture as fertilizer 4; selecting the composite novel soil conditioning functional material prepared in the example 5 and urea to mix according to the weight ratio of 1: 1, and calculating the mixture as fertilizer 5; the amount of the fertilizer 6 is only selected from urea, the application amounts of the fertilizer 4, the fertilizer 5 and the fertilizer 6 are consistent, the consistency of other conditions is kept, the fertilizer is respectively used for planting wheat, rape and cotton, and the yield increase comparison results are shown in the following table 2.
TABLE 2
| | Fertilizer | 4 | Fertilizer 5 | |
| Wheat (Triticum aestivum L.) | 21.7％ | 20.8％ | 18.7％ | |
| Rape seed | 29.8％ | 37.6％ | 24.3％ | |
| Cotton | 26.9％ | 44.7％ | 22.1％ |
Claims (4)
1. A method for producing a novel soil conditioning functional material from industrial solid waste, characterized by comprising the steps of:
(1) mixing
Mixing industrial solid waste, an adhesive and an acid-base adjusting material, and mechanically blending to obtain a blending material;
the using amount ratio of the industrial solid waste to the adhesive is 90-95: 3-7 in parts by weight;
the adhesive is composed of bentonite, corn dextrin and plant roots and stems, wherein the dosage ratio of the bentonite to the corn dextrin to the plant roots and stems is 3-5: 1-3 in parts by weight;
the acid-base adjusting material comprises an acidic material and a basic material;
(2) shaping of
Pressing the mixture prepared in the step (1) into capsule-shaped particles by a ball press;
(3) reduction roasting
Reducing and roasting the capsule-shaped particles obtained in the step (2) by adopting a mineral roasting reduction device, wherein the mineral roasting reduction device comprises a feeding area, a drying preheating area, a roasting oxidation reaction area, a pressure regulating area, a reduction reaction area, a discharging area and a water seal cooling area which are sequentially arranged from top to bottom and are mutually communicated; the feeding area is sequentially provided with a No. 1 automatic sealing device and a No. 2 automatic sealing device from top to bottom; a directional pressurizing device is arranged at the upper part of the drying preheating zone and is used for vacuumizing; a first layer of combustion agent adding device and a second layer of combustion agent adding device are sequentially arranged above and below the periphery of the roasting oxidation reaction zone and are used for providing combustion agents; mineral turnover devices are arranged in the drying preheating zone, the roasting oxidation reaction zone and the reduction reaction zone; a plurality of pressure regulating air doors are arranged on the side wall of the pressure regulating area; a reducing agent adding device is arranged at the lower part of the reduction reaction zone and is used for providing a reducing agent; an automatic ore discharging device is arranged in the discharging area; a water quenching cooling device is arranged in the water seal cooling area; the reduction roasting specifically comprises the following steps:
(31) starting an automatic sealing device of the feeding area to enable the capsule-shaped particles to enter a drying preheating area through the feeding area;
(32) starting the directional pressurizing device to enable the gas-phase combustion agent provided by the combustion agent adding device and the gas-phase reducing agent provided by the reducing agent adding device to move upwards under the pumping action of the directional pressurizing device;
(33) preheating the capsule-shaped particles by a gas-phase combustion agent and a reducing agent in a drying preheating zone, then slowly descending the capsule-shaped particles under the action of self gravity and air pressure, and passing through a roasting oxidation reaction zone, a pressure regulating zone and a reduction reaction zone;
(34) the roasting oxidation reaction zone is a negative pressure zone, and the pressure range is controlled to be P0-300Pa～P0-4000Pa，P0The temperature is 750-1250 ℃, mineral molecules in the capsule-shaped particles are in an active state under the control of pressure and temperature, and meanwhile, crystal water, capillary water, gaseous and liquid substances in the capsule-shaped particles are removed to form a honeycomb pore structure in the capsule-shaped particles;
(35) controlling the opening number of the pressure regulating air doors of the pressure regulating area to ensure that the reduction reaction area is a positive pressure area and the pressure range of the reduction area is controlled to be P0+300Pa～P0+4000Pa，P0Under the atmospheric pressure and the temperature range of 750-1250 ℃, in the reduction zone, the mineral molecules in the capsule-shaped particles and reducing agent molecules perform oxidation-reduction reaction in a high-activity state, and the valence state of the mineral is essentially changed;
(36) discharging the capsule-shaped particles reduced in the reduction reaction zone into a water seal cooling zone through a discharging zone, controlling the temperature range of the water seal cooling zone to be 50-80 ℃, and discharging the capsule-shaped particles after the capsule-shaped particles are cooled and stabilized in the water seal cooling zone to obtain a novel soil conditioning functional material;
(4) synthesis of
Selecting any one or combination of more than two of diammonium phosphate, urea, ammonium bicarbonate, ammonium nitrate, calcium superphosphate, potassium chloride and potassium dihydrogen phosphate to prepare a solution;
soaking the prepared novel soil conditioning functional material in the solution, and then taking out; or spraying the solution on the prepared novel soil conditioning functional material through a nozzle;
(5) drying by baking
Drying the novel soil conditioning functional material soaked in the solution or the novel soil conditioning functional material sprayed with the solution at 50-60 ℃ to obtain a composite novel soil conditioning functional material;
the method also comprises a step of magnetizing the novel soil conditioning functional material, namely, the novel soil conditioning functional material soaked in the solution or the novel soil conditioning functional material sprayed with the solution is placed in a magnetic field environment for magnetizing when being dried or after being dried;
the industrial solid waste comprises mineral processing tailings, blast furnace slag, steel slag, red mud, non-ferrous slag, fly ash, coal slag and sulfate slag.
2. The method for producing a novel soil conditioning functional material using industrial solid waste according to claim 1, wherein: the acidic material is selected from organic acid or inorganic acid, the inorganic acid comprises hydrochloride radical, sulfate radical and nitrate radical, and the alkaline material is selected from sodium ion or hydrated lime.
3. The method for producing a novel soil conditioning functional material using industrial solid waste according to claim 1, wherein: when the industrial solid waste is red mud, the acid-base adjusting material is acid mineral, wherein the weight ratio of the red mud, the adhesive and the acid mineral is 92: 5: 3, and the weight ratio of the bentonite, the corn dextrin and the plant rhizome in the adhesive is 3: 1.
4. The method for producing a novel soil conditioning functional material using industrial solid waste according to claim 1, wherein: the novel soil conditioning functional material is soaked in the solution for 30-60 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010589877.4A CN111690416B (en) | 2020-06-24 | 2020-06-24 | Method for producing novel soil conditioning functional material by utilizing industrial solid waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010589877.4A CN111690416B (en) | 2020-06-24 | 2020-06-24 | Method for producing novel soil conditioning functional material by utilizing industrial solid waste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111690416A CN111690416A (en) | 2020-09-22 |
| CN111690416B true CN111690416B (en) | 2021-11-23 |
Family
ID=72483954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010589877.4A Active CN111690416B (en) | 2020-06-24 | 2020-06-24 | Method for producing novel soil conditioning functional material by utilizing industrial solid waste |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111690416B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112521952B (en) * | 2020-12-07 | 2021-11-16 | 苏州础润环境修复科技有限公司 | Soil passivation microcapsule and method for resource utilization of titanium gypsum |
| CN114479874B (en) * | 2022-01-28 | 2023-05-16 | 山东大学 | Red mud-based heavy metal curing agent and preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4544542A (en) * | 1984-04-16 | 1985-10-01 | Dorr-Oliver Incorporated | Method for oxidation of flue gas desulfurization absorbent and the product produced thereby |
| WO2003068701A1 (en) * | 2002-02-11 | 2003-08-21 | Amazon Environmental | Introducing an additive to portland cement |
| CN1640987A (en) * | 2004-01-09 | 2005-07-20 | 王培武 | Soil improver, and its preparing method and use method |
| CN102329620A (en) * | 2011-10-13 | 2012-01-25 | 武汉凯迪工程技术研究总院有限公司 | Heavy-metal-polluted acidic soil repairing material as well as preparation method and application thereof |
| CN103551375A (en) * | 2013-10-21 | 2014-02-05 | 同济大学 | Preparation method of ion mineralization blocking agent for heavy metal contaminated soil remediation |
| CN108176707A (en) * | 2017-12-28 | 2018-06-19 | 广东省矿产应用研究所 | Lead-cadmium composite polluted soil in-situ passivator and preparation method thereof |
| CN111303890A (en) * | 2020-01-21 | 2020-06-19 | 新疆盛洁环境技术有限责任公司 | Curing agent for solid waste treatment and application thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203462103U (en) * | 2013-07-29 | 2014-03-05 | 青岛智邦炉窑设计研究有限公司 | Mineral roasting reduction device |
| CN103409615B (en) * | 2013-07-29 | 2014-09-10 | 青岛智邦炉窑设计研究有限公司 | Mineral roasting reduction device and application method thereof |
| CN106119532A (en) * | 2016-08-01 | 2016-11-16 | 江苏省冶金设计院有限公司 | Process the method and system of red mud |
| CN108048109A (en) * | 2017-12-20 | 2018-05-18 | 北京东方复地环境科技有限公司 | It is a kind of for multi-functional passivator of paddy fields in south china heavy metal-polluted soil Cd and preparation method thereof |
| CN109134154B (en) * | 2018-11-06 | 2021-08-10 | 中国有色桂林矿产地质研究院有限公司 | Red mud silicon calcium potassium fertilizer and preparation method thereof |
| CN110317097A (en) * | 2019-05-30 | 2019-10-11 | 昌鑫生态科技(陕西)有限公司 | A kind of production technology using Industrial Solid Waste processing multifunction soil conditioner |
-
2020
- 2020-06-24 CN CN202010589877.4A patent/CN111690416B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4544542A (en) * | 1984-04-16 | 1985-10-01 | Dorr-Oliver Incorporated | Method for oxidation of flue gas desulfurization absorbent and the product produced thereby |
| WO2003068701A1 (en) * | 2002-02-11 | 2003-08-21 | Amazon Environmental | Introducing an additive to portland cement |
| CN1640987A (en) * | 2004-01-09 | 2005-07-20 | 王培武 | Soil improver, and its preparing method and use method |
| CN102329620A (en) * | 2011-10-13 | 2012-01-25 | 武汉凯迪工程技术研究总院有限公司 | Heavy-metal-polluted acidic soil repairing material as well as preparation method and application thereof |
| CN103551375A (en) * | 2013-10-21 | 2014-02-05 | 同济大学 | Preparation method of ion mineralization blocking agent for heavy metal contaminated soil remediation |
| CN108176707A (en) * | 2017-12-28 | 2018-06-19 | 广东省矿产应用研究所 | Lead-cadmium composite polluted soil in-situ passivator and preparation method thereof |
| CN111303890A (en) * | 2020-01-21 | 2020-06-19 | 新疆盛洁环境技术有限责任公司 | Curing agent for solid waste treatment and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111690416A (en) | 2020-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104046361A (en) | Composite heavy metal polluted soil conditioner as well as application and application method thereof | |
| CN110079332B (en) | Soil conditioner and preparation method and use method thereof | |
| CN111690416B (en) | Method for producing novel soil conditioning functional material by utilizing industrial solid waste | |
| CN105001020A (en) | Compound mixing fertilizer having heavy metal passivation effect, preparation method and uses thereof | |
| CN105950165A (en) | Remediation conditioner for chromium-contaminated soil and remediation method adopting remediation conditioner | |
| CN114192565B (en) | Novel method for repairing heavy metal cadmium, arsenic, mercury, lead and chromium composite contaminated soil | |
| CN107382535B (en) | Compound fertilizer rich in mineral substances and production process thereof | |
| CN113527000A (en) | Compound agent for passivation remediation of heavy metal contaminated farmland soil and application thereof | |
| CN108774531A (en) | A kind of renovation agent and preparation method thereof for administering alkaline cadmium pollution soil | |
| CN102617227A (en) | Slowly-released magnetized compound fertilizer and preparation method thereof | |
| CN107556062A (en) | Quenched from flyash the method that water-soluble silicon prepares multiplex siliceous fertilizer | |
| CN104230571A (en) | Dispersible biological compound fertilizer made from gutter oil, and preparation method thereof | |
| CN113800973A (en) | Soil conditioner suitable for acidic farmland and preparation method thereof | |
| Mohammadi Torkashvand | RETRACTED ARTICLE: Effect of steel converter slag as iron fertilizer in some calcareous soils | |
| CN113024311A (en) | Boron-magnesium-calcium soil conditioner and preparation method thereof | |
| CN106187476A (en) | A kind of Semen Tritici aestivi special slow release magnetic compound fertiliser material and preparation method thereof | |
| CN112409105A (en) | Soil conditioner for mining and metallurgy sludge-based forests and preparation method thereof | |
| CN109400337A (en) | A kind of fertilizer and its preparation and application for promoting rice and wheat tiller to increase production | |
| CN101805228B (en) | Method for harmlessly treating molybdenum mine tailing and preparing slow-release BB fertilizer using the same | |
| CN115073242B (en) | Composite soil conditioner based on alkaline residues of phosphorus chemical industry and preparation method and application thereof | |
| CN103771966A (en) | Method for producing secondary element fertilizer from silica fume | |
| CN108517215B (en) | Acid soil heavy metal lead-cadmium in-situ passivator and preparation method and application thereof | |
| KR20010002046A (en) | Method of soil reclamation pellet for rice crop of saline soil using gypsum and organics sludge | |
| CN107030099B (en) | Stabilizer for synchronously and efficiently repairing lead-cadmium composite polluted red soil | |
| CN113087578A (en) | Chemical fertilizer with soil heavy metal restoration function and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |