CN114525161A - Coke passivator and preparation method thereof - Google Patents
Coke passivator and preparation method thereof Download PDFInfo
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- CN114525161A CN114525161A CN202210274666.0A CN202210274666A CN114525161A CN 114525161 A CN114525161 A CN 114525161A CN 202210274666 A CN202210274666 A CN 202210274666A CN 114525161 A CN114525161 A CN 114525161A
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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
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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
- C10L10/14—Use of additives to fuels or fires for particular purposes for improving low temperature properties
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/007—Conditions of the cokes or characterised by the cokes used
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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
- C10L2200/00—Components of fuel compositions
- C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
- C10L2200/0204—Metals or alloys
- C10L2200/0213—Group II metals: Be, Mg, Ca, Sr, Ba, Ra, Zn, Cd, Hg
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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
- C10L2200/00—Components of fuel compositions
- C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
- C10L2200/0204—Metals or alloys
- C10L2200/0218—Group III metals: Sc, Y, Al, Ga, In, Tl
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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
- C10L2200/00—Components of fuel compositions
- C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
- C10L2200/0268—Phosphor containing compounds
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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
- C10L2200/00—Components of fuel compositions
- C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
- C10L2200/0272—Silicon containing compounds
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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
- C10L2200/00—Components of fuel compositions
- C10L2200/02—Inorganic or organic compounds containing atoms other than C, H or O, e.g. organic compounds containing heteroatoms or metal organic complexes
- C10L2200/029—Salts, such as carbonates, oxides, hydroxides, percompounds, e.g. peroxides, perborates, nitrates, nitrites, sulfates, and silicates
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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
- C10L2200/00—Components of fuel compositions
- C10L2200/04—Organic compounds
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention relates to the technical field of coke production auxiliary agents, in particular to a coke passivator and a preparation process thereof. The coke passivator comprises the following components in parts by weight: 30-40 parts of a boron-containing compound, 10-15 parts of silicon dioxide, 5-10 parts of titanium dioxide, 3-5 parts of calcium carbonate, 3-5 parts of calcium phosphate and 1-3 parts of lanthanum chloride, wherein the boron-containing compound comprises boric acid, borax and boron oxide, and the boric acid comprises the following components in parts by weight: borax: boron oxide =1:1-3: 1-3. The invention has the beneficial effects that: the coke passivator can obviously reduce the reactivity of coke and improve the strength after reaction.
Description
Technical Field
The invention belongs to the technical field of coke production auxiliary agents, and particularly relates to a coke passivator and a preparation method thereof.
Background
The coke is a solid fuel formed by a series of complex physicochemical processes such as pyrolysis, polycondensation, solidification, shrinkage and the like of a coking coal material under the action of high-temperature dry distillation. More than 96% carbon and the calorific value is about 29X 103 kJ/kg. The coke is mainly used for blast furnace ironmaking and blast furnace smelting of nonferrous metals such as copper, lead, zinc, titanium, antimony, mercury and the like, and plays roles of a reducing agent, a heating agent and a material column framework. Among the coke performance indexes, the coke reactivity and the strength after reaction are more and more important for blast furnace iron making. At present, the coke passivator can reduce the reactivity of the coke and improve the strength of the coke after reaction.
Chinese patent publication No. CN101654634A discloses a coke passivating agent. The coke passivator comprises the following raw materials in parts by weight: 1-16 parts of glucose or calcium chloride, 1-45 parts of boric anhydride, 1-15 parts of titanium dioxide, 1-10 parts of silicon dioxide, 1-45 parts of anhydrous borax, 1-46 parts of calcium borate and 1-30 parts of barium metaborate. The coke passivator can improve the thermal property of coke, inhibit the dissolution loss reaction of the coke, reduce the reactivity of the coke, increase the thermal strength of the coke, optimize the form of carbon and reduce the cracking of the coke after entering a furnace.
Based on this, the present inventors have desired to provide another coke deactivator capable of reducing the reactivity of coke and improving the strength after reaction.
Disclosure of Invention
The invention aims to provide a coke passivator which can remarkably reduce the reactivity of coke and improve the strength after reaction. The above object of the present invention is achieved by the following technical solutions:
a coke passivator comprises the following components in parts by weight:
30-40 parts of boron-containing compound
10-15 parts of silicon dioxide
5-10 parts of titanium dioxide
3-5 parts of calcium carbonate
1-3 parts of calcium phosphate
0.5-1 part of lanthanum chloride
The boron-containing compound comprises boric acid, borax and boron oxide according to the weight ratio of 1: 1-3.
Furthermore, the coke passivator also comprises 20-30 parts by weight of high magnesium powder.
Further, the coke passivator also comprises 5-10 parts of silicon-aluminum powder and 5-10 parts of silicon-calcium powder by weight.
Further, the coke passivator also comprises 1-5 parts by weight of fructose.
Further, the coke passivator also comprises 1-3 parts of triethanolamine by weight.
The invention also aims to provide a preparation process of the coke passivator, which comprises the following steps:
the method comprises the following steps: mixing boric acid, borax and boron oxide according to the weight ratio of boric acid to borax to boron oxide of 1:1-3 to obtain a boron-containing compound;
step two: weighing 30-40 parts of boron-containing compound, 10-15 parts of silicon dioxide, 5-10 parts of titanium dioxide, 3-5 parts of calcium carbonate, 1-3 parts of calcium phosphate, 0.5-1 part of lanthanum chloride, 20-30 parts of high magnesium powder, 5-10 parts of silicon-aluminum powder, 5-10 parts of silicon-calcium powder, 1-5 parts of fructose and 1-3 parts of triethanolamine according to parts by weight, and uniformly mixing.
In conclusion, the invention has the following beneficial effects:
1. boric acid and borate in borax can be combined with carbon atoms at the periphery of crystal lattices under the anhydrous condition, so that the total amount of active sites such as edge carbon atoms is reduced; boron is intercalated as a compound between layers of graphite crystals in the coke to form substitutional solid solutions in the carbon; boric acid and borax cover the surface of the coke to play a role of a protective film; boron is a non-metallic element and has the reaction performance of common non-metallic elements, electrons are accepted under most conditions, electronegative ions are formed on the surface of coke, the chemical adsorption potential energy of oxygen is increased, the reaction of oxygen on carbon is hindered, and the generation of CO is inhibited; when the boric acid is heated to 1100 ℃ along with the coke, partial dehydration is carried out to obtain metaboric acid HBO2Further dehydrating to obtain B2O3，B2O3Are typically acidic materials. Due to dehydration of the acidic substance by heating, in B2O3The surface forms a B-O-B bond. B is an electron-deficient body, has electrophilic tendency, and the coke dissolution loss reaction is easy to occur on the defect part on the coke surface. The surface defect sites are abundantCarbon arc pair electrons enable B-O-B bonds to easily gather to lone pair electrons, so that active sites which are depended on by the dissolution loss reaction are blocked, the effective surface area of the active sites is reduced, the dissolution loss reaction is hindered, and the inhibition effect is enhanced due to the increase of the number of the B-O-B bonds. Therefore, the reactivity of coke dissolution loss reaction is continuously reduced by adding the boric acid and the borax, and the strength after the reaction is continuously enhanced;
2. the addition of boron oxide increases the number of B-O-B bonds, and further enhances the inhibition effect on the dissolution loss reaction;
3. the silicon dioxide, the titanium dioxide, the calcium carbonate and the calcium phosphate have a negative catalytic effect on the reactivity of the coke, so that the reactivity of the coke is reduced, and the strength of the coke after reaction is improved; phosphorus is intercalated as a compound between layers of graphite crystals in coke to form substitutional solid solutions in carbon; phosphorus is a non-metallic element, has the reaction performance of common non-metallic elements, and can accept electrons under most conditions to form electronegative ions on the surface of coke, so that the chemical adsorption potential energy of oxygen is increased, the reaction of oxygen on carbon is hindered, and the generation of CO is inhibited; partial dehydration of phosphate radical to obtain HPO (metaphosphoric acid) when the coke is heated to 1100 DEG C3Further dehydrating to obtain P2O5，P2O5Are typically acidic materials. Due to dehydration of the acidic substance by heating, in P2O5The surface forms P-O-P bonds. P is electron-deficient and has electrophilic tendency, and the coke dissolution loss reaction is easy to occur on the surface defect part of the coke. The surface defect sites have a large number of carbon arc pair electrons, so that P-O-P bonds are easy to gather to lone pair electrons, active sites on which the dissolution loss reaction is based are blocked, the effective surface area of the active sites is reduced, the dissolution loss reaction is blocked, and the blocking effect is enhanced due to the increase of the number of the P-O-P bonds. Therefore, the reactivity of coke dissolution loss reaction is continuously reduced by adding the calcium phosphate, and the strength after the reaction is continuously enhanced;
4. lanthanum chloride is a trace element lanthanum introduced into a coke thermal strength material system, and the addition of lanthanum can enhance the passivation effect of a passivator, further reduce the reactivity of coke and improve the strength of the coke after reaction;
5. alumina, high magnesium powder, silicon-aluminum powder, silicon-calcium powder and fructose are used as fillers and filled in micropores on the surface of the coke, so that the production cost is reduced;
6. the triethanolamine is used as an antifreezing agent, and can endow the coke antifreezing agent with a good antifreezing effect, so that the usability of the coke passivator in cold weather is enhanced.
Detailed Description
Examples 1-5 are presented to illustrate the composition of the coke hot strength material. The compositions of examples 1-5 are shown in Table 1.
TABLE 1, EXAMPLES 1-5 TABLE OF HIGH HEAT MATERIAL COMPONENTS OF COKE
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Boron-containing compound per part | 40 | 30 | 33 | 35 | 38 |
| Boric acid, borax and boron oxide | 1∶1∶3 | 1∶1∶1 | 1∶1∶2 | 1∶3∶2 | 1∶2∶1 |
| Silicon dioxide per part | 15 | 10 | 12 | 13 | 14 |
| Titanium dioxide per part | 10 | 8 | 6 | 5 | 7 |
| Calcium carbonate per part | 5 | 4 | 3 | 5 | 4 |
| Calcium phosphate per serving | 3 | 2 | 1 | 2 | 3 |
| Lanthanum chloride per part | 1 | 0.8 | 0.5 | 0.7 | 1 |
| High magnesium powder/portion | 30 | 20 | 22 | 25 | 27 |
| Silicon-aluminum powder/part | 10 | 5 | 8 | 7 | 6 |
| Silicon calcium powder/portion | 5 | 10 | 7 | 8 | 9 |
| Fructose/portion | 5 | 4 | 3 | 1 | 2 |
| Triethanolamine per part | 3 | 2 | 1 | 1 | 2 |
Note: the unit "part" means part by weight
The following describes in detail the preparation of the coke passivators of examples 1-5, with reference to table 1.
A preparation process of a coke passivator comprises the following steps:
the method comprises the following steps: mixing boric acid, borax and boron oxide according to a weight ratio to obtain a boron-containing compound;
step two: weighing the boron-containing compound, the silicon dioxide, the titanium dioxide, the calcium carbonate, the calcium phosphate, the lanthanum chloride, the high magnesium powder, the silicon-aluminum powder, the silicon-calcium powder, the fructose and the triethanolamine according to the parts by weight, and uniformly mixing.
The method of using the coke passivator of examples 1-5 is described in detail below.
A method for using a coke passivator, comprising the steps of:
step 1: adding a coke passivator into water, stirring for 5min, and preparing a coke passivator solution with the concentration of 5%;
step 2: uniformly spraying the coke passivator solution on the surface of the coke, wherein the spraying amount is 10% of the mass of the coke, and storing the coke for 1h after the spraying is finished.
Reactivity and post-reaction strength test
Step 1: the coke sprayed with the coke passivators of the examples 1 to 5 is tested for reactivity and post-reaction strength by referring to GB/T4000-1996 test method for coke reactivity and post-reaction strength, and the coke not sprayed with the coke passivators of the examples 1 to 5 is simultaneously tested as a control example;
and 2, step: after repeating step 1 4 times, the reactivity and post-reaction strength of the resulting 5 coke were averaged.
TABLE 2 Coke reactivity and Strength test record Table after reaction
From table 2, the following conclusions can be drawn:
1. compared with the comparative example and the examples 1 to 5, the coke sprayed with the coke passivator of the examples 1 to 5 has far lower reactivity than the comparative example, and the strength after reaction is far higher than the comparative example;
2. comparing examples 1-5, spray example 3 was less reactive than the other examples and had higher post-reaction strength than the other examples.
Mechanical Strength test
The mechanical strength of the coke obtained by spraying each of the coke deactivators of examples 1 to 5 was measured with reference to GB/T2006-2008 "method for measuring mechanical strength of coke", and the coke obtained by not spraying the coke deactivators of examples 1 to 5 was measured as a control example.
TABLE 3 Coke mechanical Strength test chart
| Comparative example | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| M40/％ | 82.1 | 84.5 | 84.6 | 84.8 | 84.7 | 84.6 |
| M10/％ | 6.9 | 5.3 | 5.1 | 5.0 | 5.2 | 5.4 |
Note: m is a group of40The larger the surface crush strength; m10Smaller indicates higher abrasion resistance.
From table 3 the following conclusions can be drawn:
1. the coke sprayed with the coke passivators of examples 1-5 has higher crushing strength and abrasion resistance compared to the control examples and comparative examples 1-5, i.e., the coke sprayed with the coke passivators of examples 1-5 has higher mechanical strength;
2. in comparison with comparative examples 1 to 5, the coke sprayed with the coke deactivator of example 3 has higher crushing strength and abrasion resistance than the coke sprayed with the coke deactivator of other examples, i.e., example 3, has higher mechanical strength.
Comparative example 1
Example 4 of the chinese patent publication No. CN101654634A was selected as comparative example 1.
The coke sprayed with the coke passivating agent of example 3 and the coke sprayed with the coke passivating agent of comparative example 1 were tested with reference to the reactivity and strength test procedure after reaction, and the coke sprayed with the coke passivating agent of example 3 and the coke passivated agent of comparative example 1 were tested with reference to the mechanical strength test procedure.
TABLE 4, COMPARATIVE EXAMPLE 1 AND EXAMPLE 3 COMPARATIVE TEST RECORDING TABLE
| Example 3 | Comparative example 1 | |
| Reactivity/% | 21.47 | 28.19 |
| Post-reaction intensity/%) | 72.04 | 64.28 |
| M40/％ | 84.8 | 83.2 |
| M10/％ | 5.0 | 6.6 |
Note: the larger the M40, the higher the surface crushing strength; the smaller M10 indicates the higher abrasion resistance.
From table 4, it can be concluded that the coke sprayed with the coke deactivator of example 3 has lower reactivity, higher strength after reaction, higher crushing strength and abrasion resistance, compared to comparative example 1. Therefore, the invention can obviously reduce the reactivity of the coke and improve the strength and mechanical strength of the coke after reaction.
Comparative example 2
Comparative example 2 differs from example 3 in that ferroferric oxide is removed, and the rest is the same as example 3.
Comparative example 3
Comparative example 3 differs from example 3 in that lanthanum chloride is removed, and the rest is the same as example 3.
Comparative example 4
Comparative example 4 differs from example 3 in that ferroferric oxide and lanthanum chloride are removed simultaneously, and the rest is the same as example 3.
The coke sprayed with the coke deactivator of example 3 and the cokes respectively sprayed with the coke deactivators of comparative examples 2 to 4 were tested with reference to the reactivity and post-reaction strength test procedures, and the coke sprayed with the coke deactivator of example 3 and the cokes respectively sprayed with the coke deactivators of comparative examples 2 to 4 were tested with reference to the mechanical strength test procedures.
TABLE 5, EXAMPLE 3 and COMPARATIVE EXAMPLES 2-4 COMPARATIVE TEST RECORDING TABLE
| Example 3 | Comparative example 2 | Comparative example 3 | Comparative example 4 | |
| Reactivity/% | 21.47 | 25.74 | 25.89 | 26.12 |
| Post-reaction intensity/%) | 72.04 | 66.96 | 67.01 | 66.34 |
| M40/％ | 84.8 | 83.6 | 83.5 | 83.4 |
| M10/％ | 5.0 | 6.3 | 6.4 | 6.7 |
Note: the larger the M40, the higher the surface crushing strength; a smaller M10 indicates a higher abrasion resistance.
From table 5, the following conclusions can be drawn:
the coke sprayed with the coke passivator of example 3 is superior to the coke sprayed with the coke passivator of comparative example 2 and comparative example 3, respectively, in the indexes of reactivity, post-reaction strength, crushing strength and abrasion resistance.
The coke sprayed with the coke deactivator of comparative example 4 was inferior to the coke sprayed with the coke deactivators of comparative example 2 and comparative example 3, respectively, in both reactivity and post-reaction strength. Therefore, the reactivity of calcium phosphate and lanthanum chloride can be reduced, and the strength after reaction can be improved. However, the combination of calcium phosphate and lanthanum chloride results in a reduction in reactivity and an increase in post-reaction strength that is greater than the sum of the reduction in reactivity and the increase in post-reaction strength of each of calcium phosphate and lanthanum chloride used alone. Therefore, calcium phosphate and lanthanum chloride can be compounded in the invention, and the reduction degree of the reactivity and the improvement degree of the strength after the reaction are increased.
The coke sprayed with the coke deactivator of comparative example 2 was inferior to the coke sprayed with the coke deactivator of comparative example 4 in both crushing strength and abrasion resistance, but was closer to the coke sprayed with the coke deactivator of comparative example 3. It can be seen that lanthanum chloride hardly affects the crushing strength and wear resistance, while calcium phosphate can improve the crushing strength and wear resistance. However, the combination of calcium phosphate and lanthanum chloride results in a greater increase in crushing strength and abrasion resistance than lanthanum chloride alone. Therefore, calcium phosphate and lanthanum chloride can generate a compounding effect in the invention, and the crushing strength and the wear resistance are improved.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (6)
1. A coke passivator, comprising the following components in parts by weight:
30-40 parts of boron-containing compound
10-15 parts of silicon dioxide
5-10 parts of titanium dioxide
3-5 parts of calcium carbonate
1-3 parts of calcium phosphate
Lanthanum chloride 0.5-1 part
The boron-containing compound comprises boric acid, borax and boron oxide, wherein the boric acid comprises the following components in percentage by weight: borax: boron oxide =1:1-3: 1-3.
2. The coke passivating agent of claim 1, wherein the coke thermally strong material further comprises 20 to 30 parts by weight of high magnesium powder.
3. The coke passivating agent according to claim 1, further comprising 5-10 parts by weight of aluminum silicon powder and 5-10 parts by weight of calcium silicon powder.
4. The coke passivating agent of claim 1, further comprising 1 to 5 parts by weight of fructose.
5. The coke passivator of claim 1, further comprising 1-3 parts by weight triethanolamine.
6. A preparation process of a coke passivator is characterized by comprising the following steps:
the method comprises the following steps: mixing boric acid, borax and boron oxide according to the weight ratio of boric acid: borax: mixing boron oxide =1:1-3:1-3 to obtain a boron-containing compound;
step two: weighing 30-40 parts of boron-containing compound, 10-15 parts of silicon dioxide, 5-10 parts of titanium dioxide, 3-5 parts of calcium carbonate, 1-3 parts of calcium phosphate, 0.5-1 part of lanthanum chloride, 20-30 parts of high magnesium powder, 5-10 parts of silicon-aluminum powder, 5-10 parts of silicon-calcium powder, 1-5 parts of fructose and 1-3 parts of triethanolamine according to parts by weight, and uniformly mixing.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR689738A (en) * | 1930-02-11 | 1930-09-10 | Process for reducing the reactivity of metallurgical cokes | |
| JPH02120393A (en) * | 1988-10-28 | 1990-05-08 | Nippon Steel Chem Co Ltd | Coke |
| BR9805156A (en) * | 1998-11-27 | 2000-06-06 | Elbert Leonardo Lopes | Coal fines recycling process |
| JP2009094231A (en) * | 2007-10-05 | 2009-04-30 | Mitsubishi Chemicals Corp | Light-emitting device |
| CN101654634A (en) * | 2009-09-09 | 2010-02-24 | 重庆汉砧科技有限公司 | Coke passivating agent |
| CN101932383A (en) * | 2008-01-25 | 2010-12-29 | 道达尔石油化学产品研究弗吕公司 | Process for obtaining modified molecular sieves |
| CN101932384A (en) * | 2008-01-25 | 2010-12-29 | 道达尔石油化学产品研究弗吕公司 | Process for obtaining catalyst composites comprising meapo and their use in conversion of organics to olefins |
| CN107904272A (en) * | 2011-02-14 | 2018-04-13 | 希乐克公司 | Processing biomass |
| CN108473484A (en) * | 2015-10-01 | 2018-08-31 | 赛诺米克斯公司 | It can be used as the compound of TRPM8 conditioning agents |
| CN109022098A (en) * | 2018-08-17 | 2018-12-18 | 宁波敬业控股集团有限公司 | Coke deactivator and preparation method thereof |
| KR20190005108A (en) * | 2017-07-05 | 2019-01-15 | 상명이엔텍 주식회사 | Additive to reduce the amount of fine dist and increase the collection efficiency of dust collector |
| CN109762622A (en) * | 2019-02-25 | 2019-05-17 | 谭祖伍 | A kind of preparation method of oxidizing solids |
-
2022
- 2022-03-18 CN CN202210274666.0A patent/CN114525161B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR689738A (en) * | 1930-02-11 | 1930-09-10 | Process for reducing the reactivity of metallurgical cokes | |
| JPH02120393A (en) * | 1988-10-28 | 1990-05-08 | Nippon Steel Chem Co Ltd | Coke |
| BR9805156A (en) * | 1998-11-27 | 2000-06-06 | Elbert Leonardo Lopes | Coal fines recycling process |
| JP2009094231A (en) * | 2007-10-05 | 2009-04-30 | Mitsubishi Chemicals Corp | Light-emitting device |
| CN101932383A (en) * | 2008-01-25 | 2010-12-29 | 道达尔石油化学产品研究弗吕公司 | Process for obtaining modified molecular sieves |
| CN101932384A (en) * | 2008-01-25 | 2010-12-29 | 道达尔石油化学产品研究弗吕公司 | Process for obtaining catalyst composites comprising meapo and their use in conversion of organics to olefins |
| CN101654634A (en) * | 2009-09-09 | 2010-02-24 | 重庆汉砧科技有限公司 | Coke passivating agent |
| CN107904272A (en) * | 2011-02-14 | 2018-04-13 | 希乐克公司 | Processing biomass |
| CN108473484A (en) * | 2015-10-01 | 2018-08-31 | 赛诺米克斯公司 | It can be used as the compound of TRPM8 conditioning agents |
| KR20190005108A (en) * | 2017-07-05 | 2019-01-15 | 상명이엔텍 주식회사 | Additive to reduce the amount of fine dist and increase the collection efficiency of dust collector |
| CN109022098A (en) * | 2018-08-17 | 2018-12-18 | 宁波敬业控股集团有限公司 | Coke deactivator and preparation method thereof |
| CN109762622A (en) * | 2019-02-25 | 2019-05-17 | 谭祖伍 | A kind of preparation method of oxidizing solids |
Non-Patent Citations (1)
| Title |
|---|
| 陈艳等: "降低1#高炉燃料消耗的生产实践", 《钢铁冶炼》, pages 19 - 21 * |
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