CN112191666B - Method for recycling industrial waste - Google Patents
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- CN112191666B CN112191666B CN202011141370.9A CN202011141370A CN112191666B CN 112191666 B CN112191666 B CN 112191666B CN 202011141370 A CN202011141370 A CN 202011141370A CN 112191666 B CN112191666 B CN 112191666B
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- 239000002440 industrial waste Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004064 recycling Methods 0.000 title claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 36
- 238000002844 melting Methods 0.000 claims abstract description 10
- 230000008018 melting Effects 0.000 claims abstract description 10
- 239000010883 coal ash Substances 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 74
- 239000000843 powder Substances 0.000 claims description 60
- 239000003245 coal Substances 0.000 claims description 35
- 229910052742 iron Inorganic materials 0.000 claims description 35
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 32
- 239000011575 calcium Substances 0.000 claims description 32
- 229910052791 calcium Inorganic materials 0.000 claims description 32
- 229910052700 potassium Inorganic materials 0.000 claims description 32
- 239000011591 potassium Substances 0.000 claims description 32
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 31
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 31
- 229910052708 sodium Inorganic materials 0.000 claims description 31
- 239000011734 sodium Substances 0.000 claims description 31
- 239000010802 sludge Substances 0.000 claims description 22
- 230000007935 neutral effect Effects 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 15
- 238000002309 gasification Methods 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 13
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 12
- 235000010755 mineral Nutrition 0.000 claims description 12
- 239000011707 mineral Substances 0.000 claims description 12
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000006386 neutralization reaction Methods 0.000 claims description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- 230000002378 acidificating effect Effects 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 239000000292 calcium oxide Substances 0.000 claims description 5
- 235000012255 calcium oxide Nutrition 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 4
- 239000000920 calcium hydroxide Substances 0.000 claims description 4
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 4
- 239000010440 gypsum Substances 0.000 claims description 4
- 229910052602 gypsum Inorganic materials 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 4
- 235000011152 sodium sulphate Nutrition 0.000 claims description 4
- 238000013329 compounding Methods 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- 229910000514 dolomite Inorganic materials 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 7
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 239000003513 alkali Substances 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract 1
- 230000003472 neutralizing effect Effects 0.000 abstract 1
- 239000002910 solid waste Substances 0.000 description 7
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 6
- 239000003830 anthracite Substances 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- 239000002956 ash Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000004939 coking Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000006184 cosolvent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for recycling industrial wastes, which specifically comprises the following steps: neutralizing with acid and alkali; step two: pre-treating; step three: molding; step four: and (3) obtaining the fluxing agent for reducing the melting point of the coal ash. The method for recycling the industrial waste can fully utilize the alkali metal elements rich in the industrial waste, and the industrial waste is processed into a fluxing agent by adding other auxiliary materials, so that the waste recycling is realized.
Description
Technical Field
The invention belongs to the technical field of solid wastes, and relates to a method for recycling industrial wastes.
Background
With the maturity and rapid popularization and application of the furnace types including the aerospace furnace, the qinghua furnace, the oriental furnace, the jin navigation furnace, the saiding furnace and the like in China, the research and development direction and the market of coal gasification are gradually dominated by the large-scale pressurized gasification furnace. The popularization and application of liquid slag discharge, which is a basic characteristic of a large-scale pressurized gasification furnace, limit the use of high ash fusion point coal in a certain sense; in order to meet the requirement of slag tapping of coal with high ash melting point (the flowing temperature is more than 1500 ℃), theoretically, only two modes can be adopted: (1) coal gasification production is carried out at operating temperatures above 1600 ℃. Because the temperature resistance limit of many refractory materials is in the temperature range, the mode has safety problems; the temperature space needs to consume a large amount of energy to realize, the operation temperature of the gasification furnace is reduced, and the method is an effective way for reducing the consumption of a coal gasification system; (2) adding fluxing agent into raw coal to reduce the melting point of the raw coal ash is the most common and effective measure adopted by the coal gasification industry at present.
The existing cosolvent is usually synthesized by various naturally-occurring ores, industrial products or byproducts, so that the resource consumption is large, and therefore, the method for recycling the industrial waste is provided for producing the cosolvent.
Disclosure of Invention
In order to overcome the defects in the prior art, a method for recycling industrial wastes is provided.
The invention is realized by the following scheme:
a method for recycling industrial wastes specifically comprises the following steps,
the method comprises the following steps: acid-base neutralization, namely, putting industrial waste to be treated into a sludge tank to form liquid sludge, and adding an alkaline substance or an acidic substance to perform a neutralization reaction on the industrial waste to obtain sludge;
step two: pretreating, namely performing filter pressing and drying on the sludge to obtain a neutral solidified body;
step three: molding, namely crushing the neutral solidified body to obtain molded particles;
step four: the product is prepared by uniformly mixing the formed particles, calcium-containing mineral powder, iron-containing mineral powder and potassium-containing and/or sodium-containing mineral powder and compounding to obtain the fluxing agent for reducing the melting point of the coal ash.
Prior to the first step, the method further comprises:
determining the composition proportion of iron, calcium, potassium and/or sodium in the industrial waste to be treated according to the element composition, the pH value and the quality of a neutral solidified body of the industrial waste to be treated, calculating the proportion and the using amount of the calcium-containing ore powder, the iron-containing ore powder and the potassium-containing and/or sodium-containing ore powder which need to be added, and uniformly mixing the calcium-containing ore powder, the iron-containing ore powder and the potassium-containing and/or sodium-containing ore powder with the formed particles according to the determined proportion relation.
The mass proportions of iron, calcium, potassium and/or sodium elements in the fluxing agent are respectively 8-15%, 10-20% and 6-25%.
The calcium-containing ore powder is one or more of carbide slag, lime powder, quicklime, hydrated lime, dolomite and hydrated gypsum, the iron-containing ore powder is one or more of iron ore, iron powder, iron oxide red and iron oxide black, and the potassium-containing and/or sodium-containing ore powder is one or more of anhydrous sodium sulphate, industrial salt and crystalline salt.
The fluxing agent is used for the slag tapping gasification furnace, and the fluxing agent with the mass fraction of 0-5.0 percent is added into coal and uniformly mixed for gasification on the basis of the coal.
The third step preferably comprises crushing and screening the neutral solidified body to a particle size range of 3-50 mm.
And the fourth step specifically comprises the step of respectively crushing and screening the calcium-containing ore powder, the iron-containing ore powder and the potassium-containing and/or sodium-containing ore powder.
The method has the beneficial effects that:
the method for recycling the industrial waste can fully utilize the alkali metal elements rich in the industrial waste, and the industrial waste is processed into the fluxing agent by adding other auxiliary materials, so that the recycling of the waste is realized, the raw material range of the fluxing agent product is expanded, and the method has the environment-friendly effect of changing waste into valuable, safety and cleanness and economic and efficient benefits on the other hand.
Detailed Description
The invention is further illustrated by the following specific examples:
a method for recycling industrial wastes specifically comprises the following steps,
the method comprises the following steps: and (2) acid-alkali neutralization, namely putting the industrial waste to be treated into a sludge tank to form liquid sludge, and adding an alkaline substance or an acidic substance, wherein the alkaline substance is one or more of sodium hydroxide, lime powder, quicklime and slaked lime, and the acidic substance is one or more of polyferric oxide, ferric sulfate, sulfuric acid, hydrochloric acid and nitric acid, so that the industrial waste is subjected to neutralization reaction to obtain sludge.
The industrial waste can be (1) metallurgical dust (mud), iron-carbon micro-electrolysis sludge or Fenton oxidation sludge, pickling waste liquid sludge and sludge formed by settling organic polymer flocculants such as polyacrylamide and the like by adding iron salt coagulants such as polyferric and the like in a sewage treatment link, and specifically comprises primary dust, secondary dust, gravity dust, iron scale and the like; the sludge conforms to the principles of iron-carbon micro-electrolysis and Fenton oxidation and is used for pretreatment, decolorization, deodorization and other purposes of various sewage; the steel pickling waste liquid exists in the forms of sludge and liquid paste press cake after neutralization treatment; (2) carbide slag, desulfurized gypsum and other high-calcium industrial wastes, which may exist in the form of dry powder, solid blocks, sludge or filter cakes; (3) various industrial wastes rich in sodium sulfate, sodium chloride/potassium, mixed salt, waste water zero discharge byproduct mixed salt, low-quality salt separation and the like.
Step two: pretreating, namely performing filter pressing and drying on the sludge to obtain a neutral solidified body; the industrial waste is put into a sludge tank to form liquid sludge which is always acidic or alkaline, and if the liquid sludge is directly processed and synthesized with auxiliary materials, the components of a solvent are easy to be unstable, so that the alkaline substance or the acidic substance is added to form salt and water, and the neutral and stable industrial waste is obtained.
Step three: molding, namely crushing the neutral solidified body to obtain molded particles; the crushing of the solid waste refers to a process of utilizing an external force to overcome cohesive force between solid waste particles to split large solid waste into small solid waste, the crushing is one of the technologies of solid waste pretreatment, the size and the shape of the solid are controlled through crushing, the recycling and the reduction of the solid waste are facilitated, and the uniform mixing of industrial waste powder and other auxiliary materials is facilitated.
Step four: the product is prepared by uniformly mixing the formed particles, calcium-containing mineral powder, iron-containing mineral powder and potassium-containing and/or sodium-containing mineral powder and compounding to obtain the fluxing agent for reducing the melting point of the coal ash.
Prior to the first step, the method further comprises:
determining the composition proportion of iron, calcium, potassium and/or sodium in the industrial waste to be treated according to the element composition, the pH value and the quality of a neutral solidified body of the industrial waste to be treated, calculating the proportion and the using amount of the calcium-containing ore powder, the iron-containing ore powder and the potassium-containing and/or sodium-containing ore powder which need to be added, and uniformly mixing the calcium-containing ore powder, the iron-containing ore powder and the potassium-containing and/or sodium-containing ore powder with the formed particles according to the determined proportion relation.
The mass proportions of iron, calcium, potassium and/or sodium elements in the fluxing agent are respectively 8-15%, 10-20% and 6-25%. The calcium-containing ore powder is one or more of lime powder, quicklime, slaked lime, dolomite and slaked gypsum, the iron-containing ore powder is one or more of iron ore, iron powder, iron oxide red and iron oxide black, and the potassium-containing and/or sodium ore powder is one or more of anhydrous sodium sulphate, industrial salt and crystalline salt.
The fluxing agent is used for the slag tapping gasification furnace, and the fluxing agent with the mass fraction of 0-5.0 percent is added into coal and uniformly mixed for gasification on the basis of the coal. The invention properly adds potassium/sodium alkali metal elements on the basis of conventional iron and calcium to form the high-efficiency fluxing agent with the addition ratio (raw material mass ratio) of not more than 5%.
The third step preferably comprises crushing and screening the neutral solidified body to a particle size range of 3-50 mm. Specifically, larger neutral solidified bodies can be crushed, the crushed neutral solidified bodies and smaller neutral solidified bodies are mixed together and screened by a vibrating screen, the particle size of undersize can be controlled to be 3-50mm, and oversize returns to continue crushing. And the fourth step specifically comprises the step of respectively crushing and screening the calcium-containing ore powder, the iron-containing ore powder and the potassium-containing and/or sodium-containing ore powder. Specifically, the larger pieces of the calcium-containing ore powder, the iron-containing ore powder and the potassium-containing and/or sodium-containing ore powder can be crushed, the crushed calcium-containing ore powder, iron-containing ore powder and potassium-containing and/or sodium-containing ore powder are mixed with the smaller pieces of the calcium-containing ore powder, iron-containing ore powder and potassium-containing and/or sodium-containing ore powder and are sieved by a vibrating screen, the particle size of the sieved substances can be controlled to be 3mm-50mm according to the requirements of the gasifier type, and the substances on the sieve are returned to be continuously crushed.
The method for recycling the industrial waste can fully utilize the alkali metal elements rich in the industrial waste, and the industrial waste is processed into the fluxing agent by adding other auxiliary materials, so that the recycling of the waste is realized, the raw material range of the fluxing agent product is expanded, and the method has the environment-friendly effect of changing waste into valuable, safety and cleanness and economic and efficient benefits on the other hand.
The invention is further explained below with reference to specific examples.
Comparative example 1
The mass proportions of iron, calcium, potassium and/or sodium elements in the fluxing agent are respectively 20%, 30% and 0, and then the fluxing agent with the mass fraction of 4.0% (based on coal, 100 parts of fluxing agent added in coal) is added into the anthracite.
Comparative example 2
The mass proportions of iron, calcium, potassium and/or sodium elements in the fluxing agent are respectively 20%, 30% and 0, and then the fluxing agent with the mass fraction of 4.4% (based on coal, 100 parts of fluxing agent added in coal) is added into the anthracite.
Example 1
The mass proportions of iron, calcium, potassium and/or sodium elements in the fluxing agent are respectively 11%, 12% and 10%, and then the fluxing agent with the mass fractions of 2.8%, 3.0% and 3.2% (based on coal, 100 parts of fluxing agent added in coal) is added into anthracite, lean coal and coking coal.
Example 2
The mass proportions of iron, calcium, potassium and/or sodium elements in the fluxing agent are respectively 12%, 10% and 9%, and then the fluxing agent with the mass fractions of 2.8%, 3.0% and 3.2% (based on coal, 100 parts of fluxing agent added in coal) is added into anthracite, lean coal and coking coal.
Example 3
The mass proportions of iron, calcium, potassium and/or sodium elements in the fluxing agent are respectively 15%, 19% and 12%, and then the fluxing agent with the mass fractions of 2.8%, 3.0% and 3.2% (based on coal, 100 parts of fluxing agent added in coal) is added into anthracite, lean coal and coking coal.
The proportion and the addition amount of the fluxing agent can be properly adjusted according to the requirements of the gasification furnace on the melting point of coal ash and the properties of different coal types in the use process.
TABLE 1 Ash chemical composition data and Ash melting Point data for high Ash melting Point coal
| Coal sample | ST | HT | FT | SiO 2 | Al 2 O 3 | Fe 2 O 3 | CaO | MgO |
| Anthracite coal | ＞1500 | ＞1500 | ＞1500 | 48.26 | 36.2 | 7.56 | 3.18 | 0.29 |
| Lean coal | ＞1500 | ＞1500 | ＞1500 | 46.72 | 33.63 | 3.7 | 5.28 | 0.84 |
| Coking coal | 1480 | ＞1500 | ＞1500 | 45.62 | 37.60 | 3.07 | 4.44 | 0.28 |
TABLE 2 influence of examples on the melting point of coal ash
From the above, the flux of the present invention can reduce the FT of the coal ash from 1500 ℃ to 1330 ℃ by properly adding the potassium/sodium alkali metal elements on the basis of the conventional iron and calcium to form the high-efficiency flux with the addition ratio (raw material mass ratio) of 0-5.0%.
Although the invention has been described and illustrated in some detail, it should be understood that various modifications may be made to the described embodiments or equivalents may be substituted, as will be apparent to those skilled in the art, without departing from the spirit of the invention.
Claims (4)
1. A method for recycling industrial wastes is characterized by comprising the following steps: the method specifically comprises the following steps of,
the method comprises the following steps: acid-base neutralization, namely determining the composition proportion of iron, calcium, potassium and/or sodium in the industrial waste to be treated according to the element composition, the pH value and the quality of a neutral solidified body of the industrial waste to be treated, calculating the proportion and the using amount of calcium-containing mineral powder, iron-containing mineral powder and potassium-containing and/or sodium-containing mineral powder which need to be added, uniformly mixing the calcium-containing mineral powder, the iron-containing mineral powder and the potassium-containing and/or sodium-containing mineral powder with formed particles according to the determined proportion relation, putting the industrial waste to be treated into a sludge pond to form liquid sludge, and adding an alkaline substance or an acidic substance to enable the industrial waste to be subjected to neutralization reaction to obtain sludge;
step two: pretreating, namely performing filter pressing and drying on the sludge to obtain a neutral solidified body;
step three: molding, namely crushing the neutral solidified body to obtain molded particles;
step four: the product is prepared by uniformly mixing the formed particles, calcium-containing ore powder, iron-containing ore powder and potassium-containing and/or sodium-containing ore powder and compounding the mixture to obtain the fluxing agent for reducing the melting point of the coal ash, wherein the mass proportions of iron, calcium, potassium and/or sodium in the fluxing agent are respectively 8-15%, 10-20% and 6-25%, the fluxing agent is used for a liquid-state slag-tapping gasification furnace, and the fluxing agent with the mass fraction of 0-5.0% is added into coal by taking the coal as a reference and is uniformly mixed for gasification.
2. The method for recycling industrial waste according to claim 1, wherein: the calcium-containing ore powder is one or more of lime powder, quicklime, slaked lime, dolomite and slaked gypsum, the iron-containing ore powder is one or more of iron ore, iron powder, iron oxide red and iron oxide black, and the potassium-containing and/or sodium ore powder is one or more of anhydrous sodium sulphate, industrial salt and crystalline salt.
3. The method for recycling industrial waste according to claim 1, wherein: and the third step specifically comprises the step of crushing and screening the neutral solidified body to obtain the neutral solidified body with the particle size ranging from 3mm to 50 mm.
4. The method for recycling industrial waste according to claim 1, wherein: and the fourth step specifically comprises the step of respectively crushing and screening the calcium-containing ore powder, the iron-containing ore powder and the potassium-containing and/or sodium-containing ore powder.
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| CN202011141370.9A CN112191666B (en) | 2020-10-22 | 2020-10-22 | Method for recycling industrial waste |
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| CN202011141370.9A CN112191666B (en) | 2020-10-22 | 2020-10-22 | Method for recycling industrial waste |
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| CN112191666A CN112191666A (en) | 2021-01-08 |
| CN112191666B true CN112191666B (en) | 2022-08-16 |
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| CN1451495A (en) * | 2003-05-20 | 2003-10-29 | 李康敏 | Method for integrative use of industrial waste residue, stabilizing and solidifying treatment of electroplating mud |
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| TWI558672B (en) * | 2015-12-17 | 2016-11-21 | 林士凱 | A method of recycling the sludge generated by the steel works and made it as the auxiliary material for steel works manufacture |
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| CN111534355A (en) * | 2020-04-01 | 2020-08-14 | 绍兴凤登环保有限公司 | Fluxing agent for reducing coal ash melting point |
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| CN1451495A (en) * | 2003-05-20 | 2003-10-29 | 李康敏 | Method for integrative use of industrial waste residue, stabilizing and solidifying treatment of electroplating mud |
| CN103274658A (en) * | 2013-01-14 | 2013-09-04 | 虞克夫 | Industrial waste residue and solid danger refuse resource utilization method |
| TWI558672B (en) * | 2015-12-17 | 2016-11-21 | 林士凱 | A method of recycling the sludge generated by the steel works and made it as the auxiliary material for steel works manufacture |
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| CN111534355A (en) * | 2020-04-01 | 2020-08-14 | 绍兴凤登环保有限公司 | Fluxing agent for reducing coal ash melting point |
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