CN111073721B - Kaolin processing method for preparing coking inhibitor component - Google Patents
Kaolin processing method for preparing coking inhibitor component Download PDFInfo
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- CN111073721B CN111073721B CN201911228581.3A CN201911228581A CN111073721B CN 111073721 B CN111073721 B CN 111073721B CN 201911228581 A CN201911228581 A CN 201911228581A CN 111073721 B CN111073721 B CN 111073721B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/04—Use of additives to fuels or fires for particular purposes for minimising corrosion or incrustation
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Abstract
The invention discloses a kaolin processing method for preparing a coking inhibitor component, which specifically comprises the following steps: the method comprises the steps of S1, dispersing, S2, desanding, S3, grading and magnetic separation, S4, flotation and superfine grinding, S5, calcination processing, S6 and kaolin post-processing, and relates to the technical field of chemical material production. According to the kaolin processing method for preparing the components of the coking inhibitor, the reaction efficiency of kaolin can be improved by improving the ingredients of the kaolin, the aim of improving the reaction efficiency of the kaolin by doping aluminum hydroxide into the kaolin to change the acidity and alkalinity of the kaolin is well fulfilled, the effect of the boiler coking inhibitor is greatly enhanced, the boiler can be well inhibited from coking without adding a large amount of inhibitor when the boiler is cleaned every time, and therefore people can use the coking inhibitor to carry out coking treatment inside the boiler conveniently.
Description
Technical Field
The invention relates to the technical field of chemical material production, in particular to a kaolin processing method for preparing a coking inhibitor component.
Background
The kaolin is clay and claystone which mainly uses kaolinite clay minerals, belongs to non-metal minerals, the kaolinite mineral components mainly comprise kaolinite, halloysite, hydromica, illite, montmorillonite, quartz, feldspar and other minerals, the pure kaolin is in a pure white, fine and soft soil shape, has good plasticity, fire resistance and other physicochemical properties, has wide application, is mainly used for paper making, ceramics and refractory materials, secondly, the kaolin is used for raw materials of coating, rubber filler, enamel glaze and white cement, and is used for industrial departments such as plastics, paint, pigment, grinding wheel, pencil, daily cosmetics, soap, pesticide, medicine, textile, petroleum, chemical engineering, building materials, national defense and the like in a small amount, the kaolin is a common and very important clay mineral in the natural world and is formed by the weathering action of feldspar or other silicate minerals in igneous rock and metamorphic rock in an acid medium lacking alkali metal and alkaline earth metal;
at present, in the production process of a boiler coking inhibitor, kaolin components are mostly required to be added for reaction and adsorption to inhibit coking in a boiler, however, the reaction efficiency of the existing inhibitor prepared from kaolin is low, so that the inhibition effect of the inhibitor is poor, a large amount of inhibitor is required to be added to ensure that coking can be well inhibited in the boiler when the boiler is cleaned every time, the improvement of the ingredients of the kaolin cannot be realized, the reaction efficiency of the kaolin is improved, the aim of improving the reaction efficiency of the kaolin by changing the acidity and alkalinity of the kaolin by doping aluminum hydroxide in the kaolin cannot be achieved, the effect of the boiler coking inhibitor is greatly reduced, and therefore, great inconvenience is brought to people for carrying out coking treatment in the boiler by using the coking inhibitor.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a kaolin processing method for preparing a coking inhibitor component, which solves the problems that the inhibitor prepared from the existing kaolin has low reaction efficiency, so that the inhibitor has poor inhibition effect, a large amount of inhibitor needs to be added to ensure that the boiler can well inhibit coking every time the boiler is cleaned, the reaction efficiency of the kaolin can not be improved by improving the ingredients of the kaolin, the aim of improving the reaction efficiency of the kaolin by changing the acidity and alkalinity of the kaolin by doping aluminum hydroxide in the kaolin can not be achieved, and the effect of the boiler coking inhibitor is greatly reduced.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a kaolin processing method for preparing a coking inhibitor component specifically comprises the following steps:
s1, dispersing: firstly, carrying out breakage treatment on selected raw ores through crushing equipment, then screening through a 100-mesh and 200-mesh screen, pouring the screened raw ore powder with the required granularity into mixing equipment, adding aluminum hydroxide and water into the mixing equipment, starting the stirring equipment to stir and mix at the rotating speed of 300-400r/min for 20-30min to prepare slurry, so that the minerals are dissociated in the water in the form of granular monomers, then adding 23-33g of a dispersing agent into the mixing equipment, and stirring at the rotating speed of 400-500r/min for 40-50min, thereby obtaining a base material;
s2, sand removal: preparing the slurry base material into a powder base material by sequentially passing the base material obtained in the step S1 through drying equipment and grinding equipment, and then respectively removing impurities of quartz, feldspar, mica scrap minerals and rock debris coarse particles by adopting desanding equipment, and removing part of iron-titanium minerals;
s3, classification and magnetic separation treatment: sorting the base material subjected to sand removal in the step S1 according to the density difference of the base material by using grading equipment, separating mineral particles in a magnetic field by using the magnetic difference of minerals through a magnetic separator, and removing magnetite, ilmenite and scrap iron mixed in the processing process;
s4, flotation and superfine grinding treatment: inhibiting kaolin by using ammonium sulfate by adopting a reverse flotation method, collecting iron and titanium impurities by using a fatty acid collecting agent, and then carrying out superfine grinding treatment on kaolin mineral aggregate by adopting a high-pressure extrusion method;
s5, calcining: putting the ore powder subjected to the superfine grinding treatment in the step S4 into a calcining furnace, calcining for 2-2.5h at the temperature of 580-650 ℃ to dehydrate the ore powder and break microscopic phases;
s6, kaolin post-processing treatment: and (4) collecting the materials calcined and processed in the step (S5) in a centralized manner, then sequentially cooling, cleaning and drying to obtain kaolin powder, then preserving by packaging equipment, and then performing quality inspection to obtain a kaolin finished product after the quality inspection is qualified.
Preferably, in the step S1, the ratio of raw ore powder to aluminum hydroxide in the mixing is 3-5: 1.
preferably, the dispersant in step S1 is one or more of barium stearate, zinc stearate, calcium stearate, cadmium stearate, magnesium stearate, and copper stearate.
Preferably, the sand removing device in step S2 is one of a float-trough classifier, a spiral classifier, a hydrocyclone or a vibrating screen.
Preferably, the classifying device in step S3 is one of a dustpan, a hydrocyclone and a centrifuge.
Preferably, the high-pressure extrusion method in step S4 is to perform super-grinding treatment on the mineral aggregate after impurity removal through the friction force and extrusion force of an extrusion part by using a high-pressure extruder, so as to obtain powder particles with the particle size of 200-300 meshes.
(III) advantageous effects
The invention provides a kaolin processing method for preparing a coking inhibitor component. Compared with the prior art, the method has the following beneficial effects:
(1) the kaolin processing method for preparing the coking inhibitor component specifically comprises the following steps: s1, dispersing: firstly, carrying out breakage treatment on selected raw ores through crushing equipment, then screening through a 100-mesh and 200-mesh screen, pouring the screened raw ore powder with the required granularity into mixing equipment, then adding aluminum hydroxide and water into the mixing equipment, starting stirring equipment, stirring and mixing for 20-30min at the rotating speed of 300-400r/min to prepare slurry, so that the minerals are dissociated in water in the form of granular monomers, S2, removing sand: preparing the slurry base material into a powder base material by sequentially passing the base material obtained in the step S1 through drying equipment and grinding equipment, then respectively removing impurities of quartz, feldspar, mica scrap minerals and rock debris coarse particles by adopting desanding equipment, and simultaneously removing part of iron and titanium minerals, S3, carrying out graded magnetic separation treatment: sorting the base material according to the density difference of the base material after sand removal in the step S1 by a grading device, separating mineral particles in a magnetic field by a magnetic separator by utilizing the magnetic difference of the mineral, removing magnetite, ilmenite and scrap iron mixed in the processing process, and carrying out S4 flotation and superfine grinding treatment: inhibiting kaolin by using ammonium sulfate by adopting a reverse flotation method, collecting iron and titanium impurities by using a fatty acid collecting agent, and then carrying out superfine grinding treatment on kaolin mineral aggregate by adopting a high-pressure extrusion method, S5, calcining and processing: putting the ore powder subjected to the superfine grinding treatment in the step S4 into a calcining furnace, calcining for 2-2.5h at the temperature of 580-650 ℃ to dehydrate the ore powder and break microscopic phases, and S6, performing kaolin post-processing treatment: the method comprises the steps of collecting the calcined and processed materials in the step S5 in a centralized manner, sequentially cooling, cleaning and drying the calcined and processed materials to obtain kaolin powder, storing the kaolin powder by packaging equipment, performing quality inspection, and obtaining a kaolin finished product after quality inspection is qualified.
(2) The kaolin processing method for preparing the coking inhibitor component comprises the following steps: preparing the slurry base material into a powder base material by sequentially passing the base material obtained in the step S1 through drying equipment and grinding equipment, then respectively removing impurities of quartz, feldspar, mica scrap minerals and rock debris coarse particles by adopting desanding equipment, removing part of iron and titanium minerals, and carrying out graded magnetic separation treatment: sorting the base material after sand removal in the step S1 according to the density difference of the base material by a grading device, separating mineral particles in a magnetic field by a magnetic separator by utilizing the magnetic difference of the minerals, removing magnetite, ilmenite and scrap iron mixed in the processing process, and carrying out sorting and superfine grinding treatment: the kaolin is inhibited by ammonium sulfate by adopting a reverse flotation method, the iron and titanium impurities are collected by using a fatty acid collecting agent, and then the kaolin mineral aggregate is subjected to superfine grinding by adopting a high-pressure extrusion method, so that the kaolin crude ore can be subjected to full magnetic separation screening, impurity removal and refining treatment, the purity of the obtained kaolin reaches the required requirement, the condition that the kaolin impurities block the reaction in an inhibitor is avoided, and the normal use of the kaolin in the coking inhibitor is ensured.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a technical solution: a kaolin processing method for preparing a coking inhibitor component specifically comprises the following embodiments:
example 1
S1, dispersing: firstly, selected raw ore is subjected to breakage treatment through crushing equipment, then the raw ore is screened through a 150-mesh screen, the screened raw ore powder with the required granularity is poured into mixing equipment, aluminum hydroxide and water are added into the mixing equipment, stirring equipment is started to stir and mix for 25min at the rotating speed of 350r/min to prepare slurry, minerals are dissociated in water in the form of granular monomers, then 27g of dispersing agent is added into the mixing equipment, and the slurry is stirred for 45min at the rotating speed of 450r/min to obtain a base material, wherein the ratio of the raw ore powder to the aluminum hydroxide in mixing is 4: 1, the dispersing agent is a composition of barium stearate, zinc stearate, calcium stearate, cadmium stearate, magnesium stearate and copper stearate;
s2, sand removal: preparing the slurry base material into a powder base material by sequentially passing the base material obtained in the step S1 through drying equipment and grinding equipment, then respectively removing impurities of quartz, feldspar, mica scrap minerals and rock debris coarse particles by adopting desanding equipment, and simultaneously removing part of iron and titanium minerals, wherein the desanding equipment is a floating groove type classifier;
s3, classification and magnetic separation treatment: sorting the base material subjected to sand removal in the step S1 according to the density difference of the base material by using grading equipment, separating mineral particles in a magnetic field by using the magnetic difference of minerals through a magnetic separator, and removing magnetite, ilmenite and scrap iron mixed in the processing process, wherein the grading equipment is a water winnow;
s4, flotation and superfine grinding treatment: inhibiting kaolin by using ammonium sulfate by adopting a reverse flotation method, collecting iron and titanium impurities by using a fatty acid collecting agent, and then carrying out superfine grinding treatment on a kaolin mineral aggregate by adopting a high-pressure extrusion method, wherein the high-pressure extrusion method is to carry out superfine grinding treatment on the mineral aggregate after impurity removal by adopting a high-pressure extruder through the friction force and extrusion force of an extrusion part, so that powder particles with the particle size of 250 meshes are obtained;
s5, calcining: putting the ore powder subjected to the superfine grinding treatment in the step S4 into a calcining furnace, calcining for 2.25 hours at the temperature of 610 ℃ to dehydrate the ore powder and break microscopic phases;
s6, kaolin post-processing treatment: and (4) collecting the materials calcined and processed in the step (S5) in a centralized manner, then sequentially cooling, cleaning and drying to obtain kaolin powder, then preserving by packaging equipment, and then performing quality inspection to obtain a kaolin finished product after the quality inspection is qualified.
Example 2
S1, dispersing: firstly, selected raw ore is subjected to breakage treatment through crushing equipment, then the raw ore is screened through a 100-mesh screen, the screened raw ore powder with the required granularity is poured into mixing equipment, aluminum hydroxide and water are added into the mixing equipment, stirring equipment is started to stir and mix for 20min at the rotating speed of 300r/min to prepare slurry, minerals are dissociated in water in the form of granular monomers, then 23-33g of dispersing agent is added into the mixing equipment, and the slurry is stirred for 40min at the rotating speed of 400r/min to obtain a base material, wherein the ratio of the raw ore powder to the aluminum hydroxide in mixing is 3: 1, the dispersant is barium stearate;
s2, sand removal: preparing the slurry base material into a powder base material by sequentially passing the base material obtained in the step S1 through drying equipment and grinding equipment, then respectively removing impurities of quartz, feldspar, mica scrap minerals and rock debris coarse particles by adopting desanding equipment, and simultaneously removing part of iron-titanium minerals, wherein the desanding equipment is a spiral classifier;
s3, classification and magnetic separation treatment: sorting the base material subjected to sand removal in the step S1 according to the density difference of the base material by using a grading device, separating mineral particles in a magnetic field by using the magnetic difference of minerals through a magnetic separator, and removing magnetite, ilmenite and scrap iron mixed in the processing process, wherein the grading device is a hydrocyclone;
s4, flotation and superfine grinding treatment: inhibiting kaolin by using ammonium sulfate by adopting a reverse flotation method, collecting iron and titanium impurities by using a fatty acid collecting agent, and then carrying out superfine grinding treatment on a kaolin mineral aggregate by adopting a high-pressure extrusion method, wherein the high-pressure extrusion method is to carry out superfine grinding treatment on the mineral aggregate after impurity removal by adopting a high-pressure extruder through the friction force and extrusion force of an extrusion part, so that powder particles with the particle size of 200 meshes are obtained;
s5, calcining: putting the ore powder subjected to the superfine grinding treatment in the step S4 into a calcining furnace, and calcining for 2 hours at the temperature of 580 ℃ to dehydrate the ore powder and break microscopic phases;
s6, kaolin post-processing treatment: and (4) collecting the materials calcined and processed in the step (S5) in a centralized manner, then sequentially cooling, cleaning and drying to obtain kaolin powder, then preserving by packaging equipment, and then performing quality inspection to obtain a kaolin finished product after the quality inspection is qualified.
Example 3
S1, dispersing: firstly, selected raw ore is subjected to breakage treatment through crushing equipment, then the raw ore is screened through a 200-mesh screen, the screened raw ore powder with the required granularity is poured into mixing equipment, aluminum hydroxide and water are added into the mixing equipment, stirring equipment is started to stir and mix for 30min at the rotating speed of 400r/min to prepare slurry, minerals are dissociated in water in the form of granular monomers, 33g of dispersing agent is added into the mixing equipment, and then the slurry is stirred for 50min at the rotating speed of 500r/min to obtain a base material, wherein the ratio of the raw ore powder to the aluminum hydroxide in mixing is 5: 1, the dispersant is copper stearate;
s2, sand removal: preparing the slurry base material into a powder base material by sequentially passing the base material obtained in the step S1 through drying equipment and grinding equipment, then respectively removing impurities of quartz, feldspar, mica scrap minerals and rock debris coarse particles by adopting desanding equipment, and simultaneously removing part of iron and titanium minerals, wherein the desanding equipment is a hydrocyclone;
s3, classification and magnetic separation treatment: sorting the base material subjected to sand removal in the step S1 according to the density difference of the base material by using grading equipment, separating mineral particles in a magnetic field by using the magnetic difference of minerals through a magnetic separator, and removing magnetite, ilmenite and scrap iron mixed in the processing process, wherein the grading equipment is a centrifugal machine;
s4, flotation and superfine grinding treatment: inhibiting kaolin by using ammonium sulfate by adopting a reverse flotation method, collecting iron and titanium impurities by using a fatty acid collecting agent, and then carrying out superfine grinding treatment on a kaolin mineral aggregate by adopting a high-pressure extrusion method, wherein the high-pressure extrusion method is to carry out superfine grinding treatment on the mineral aggregate after impurity removal by adopting a high-pressure extruder through the friction force and extrusion force of an extrusion part, so that powder particles with the particle size of 300 meshes are obtained;
s5, calcining: putting the ore powder subjected to the superfine grinding treatment in the step S4 into a calcining furnace, calcining for 2.5 hours at the temperature of 650 ℃ to dehydrate the ore powder and break microscopic phases;
s6, kaolin post-processing treatment: and (4) collecting the materials calcined and processed in the step (S5) in a centralized manner, then sequentially cooling, cleaning and drying to obtain kaolin powder, then preserving by packaging equipment, and then performing quality inspection to obtain a kaolin finished product after the quality inspection is qualified.
Test experiments
A chemical production enterprise respectively prepares three groups of kaolin products by adopting the processing method of the embodiment 1-3 of the invention, simultaneously selects the kaolin products of the same type on the market as a reference group, then respectively carries out the same production process on the four groups of kaolin products, and adds the same amount to produce four groups of boiler coking inhibitors, then respectively adds the four groups of boiler coking inhibitors into the boilers for use, then records the coking conditions in the four groups of boilers, and the test results are shown in table 1.
Table 1 side view results table of test experiment
As can be seen from table 1, the coking inhibitor prepared by the preparation method of embodiment 1 of the present invention has the best inhibition effect, and the coking inhibitor prepared by the preparation methods of embodiment 2 and embodiment 3 has significantly improved inhibition effect compared with the coking condition of the control group, so that the present invention can improve the reaction efficiency of kaolin by improving the ingredients of kaolin, and well achieve the purpose of improving the reaction efficiency of kaolin by changing the acidity and alkalinity of kaolin by doping aluminum hydroxide in kaolin, thereby greatly enhancing the efficacy of the boiler coking inhibitor, ensuring that the boiler can well inhibit coking without adding a large amount of inhibitor when the boiler is cleaned, and greatly facilitating people to use the coking inhibitor to perform coking treatment inside the boiler.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A kaolin processing method for preparing a coking inhibitor component is characterized by comprising the following steps: the method specifically comprises the following steps:
s1, dispersing: firstly, crushing selected raw ores through crushing equipment, then screening through a 100-mesh and 200-mesh screen, pouring the screened raw ore powder with the required granularity into mixing equipment, then adding aluminum hydroxide and water into the mixing equipment, starting the stirring equipment to stir and mix at the rotating speed of 300-mesh and 400r/min for 20-30min to prepare slurry, so that the minerals are dissociated in the water in the form of granular monomers, then adding 23-33g of a dispersing agent into the mixing equipment, and stirring at the rotating speed of 400-mesh and 500r/min for 40-50min, thereby obtaining a base material; s2, sand removal: preparing the slurry base material into a powder base material by sequentially passing the base material obtained in the step S1 through drying equipment and grinding equipment, and then respectively removing impurities of quartz, feldspar, mica scrap minerals and rock debris coarse particles by adopting desanding equipment, and removing part of iron-titanium minerals;
s3, classification and magnetic separation treatment: sorting the base material subjected to sand removal in the step S2 according to the density difference of the base material by using grading equipment, separating mineral particles in a magnetic field by using the magnetic difference of minerals through a magnetic separator, and removing magnetite, ilmenite and scrap iron mixed in the processing process; s4, flotation and superfine grinding treatment: inhibiting kaolin by using ammonium sulfate by adopting a reverse flotation method, collecting iron and titanium impurities by using a fatty acid collecting agent, and then carrying out superfine grinding treatment on kaolin mineral aggregate by adopting a high-pressure extrusion method;
s5, calcining: putting the ore powder subjected to the superfine grinding treatment in the step S4 into a calcining furnace, calcining for 2-2.5h at the temperature of 580-650 ℃ to dehydrate the ore powder and break microscopic phases;
s6, kaolin post-processing treatment: and (4) collecting the materials calcined and processed in the step (S5) in a centralized manner, then sequentially cooling, cleaning and drying to obtain kaolin powder, then preserving by packaging equipment, and then performing quality inspection to obtain a kaolin finished product after the quality inspection is qualified.
2. The process of claim 1, wherein the kaolin clay is processed to produce a coking inhibitor component, the process comprising: the ratio of the raw ore powder to the aluminum hydroxide in the mixing in the step S1 is 3-5: 1.
3. the process of claim 1, wherein the kaolin clay is processed to produce a coking inhibitor component, the process comprising: the dispersing agent in the step S1 is one or more of barium stearate, zinc stearate, calcium stearate, cadmium stearate, magnesium stearate, and copper stearate.
4. The process of claim 1, wherein the kaolin clay is processed to produce a coking inhibitor component, the process comprising: the sand removing equipment in the step S2 is one of a floating groove type classifier, a spiral classifier, a hydrocyclone or a vibrating screen.
5. The process of claim 1, wherein the kaolin clay is processed to produce a coking inhibitor component, the process comprising: the classification device in the step S3 is one of a dustpan, a hydrocyclone and a centrifuge.
6. The process of claim 1, wherein the kaolin clay is processed to produce a coking inhibitor component, the process comprising: the high-pressure extrusion method in the step S4 is to perform super-grinding treatment on the mineral aggregate after impurity removal through the friction force and extrusion force of an extrusion part by using a high-pressure extruder, so as to obtain powder particles with the particle size of 200-300 meshes.
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