CN113862466A - Novel process method for co-processing hazardous waste hw17 by sintering machine - Google Patents
Novel process method for co-processing hazardous waste hw17 by sintering machine Download PDFInfo
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- CN113862466A CN113862466A CN202110967211.2A CN202110967211A CN113862466A CN 113862466 A CN113862466 A CN 113862466A CN 202110967211 A CN202110967211 A CN 202110967211A CN 113862466 A CN113862466 A CN 113862466A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/005—Preliminary treatment of scrap
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Abstract
The invention discloses a novel process method for cooperatively treating hazardous waste hw17 by a sintering machine, which comprises the steps of firstly, utilizing an automobile to seal and transport surface treatment waste hw17 to a project site, using an electric single-beam crane to transport bagged surface treatment waste hw17 to the upper part of a stainless steel silo, enabling materials to enter the silo through a tank breaker or a bag breaker on the upper part of the silo, and sealing the top by a sealing cover after the materials are loaded. The surface treatment waste hw17 in the bin enters a pull-type belt scale from the bottom of the bin, is proportionally mixed into the sintering mixture, enters a sintering mixture bin after mixing, enters a sintering machine for sintering, and is finally sintered into a sintered ore finished product. The new process method for the sintering machine to cooperatively treat the hazardous waste hw17 does not need to input new equipment and change the process of the original sintering machine, and has the advantages of thorough treatment, low treatment cost and simple process and operation.
Description
Technical Field
The invention relates to the field of chemical production, in particular to a novel process method for cooperatively treating hazardous waste hw17 by a sintering machine.
Background
Hw17 is a heavy metal-containing surface treatment sludge (acid cleaning sludge: 336-.
Introduction of the prior disposal technology:
resource utilization: dissolving sludge by using sulfuric acid, removing sludge by filter pressing, and removing iron from filtrate through oxidation reaction; after iron removal, the filtrate is heated, reduced and filter-pressed to extract chromium hydroxide, and the chromium slag is converted into chromium production workshop to produce basic chromium sulfate; extracting copper, zinc and nickel solution from the filtrate by an organic phase; and adding sulfuric acid to back extract pure nickel sulfate, zinc and copper, and crystallizing to obtain the product. The advantages are that: the treatment is thorough; the disadvantages are as follows: professional enterprises need to be built, the process is complex, the flow is long, and the equipment investment is huge; the requirement on useful elements is high, the proportion of the useful elements is low, and the economic benefit is poor; the disposal cost is high, and the economic benefit is unstable; the treatment of resource is less dangerous and waste, and the production efficiency of enterprises is unstable.
And (3) cement kiln co-treatment: the sludge is homogenized and pretreated, and enters a cement kiln for cooperative treatment according to a certain proportion. The advantages are that: the equipment investment is low and the disposal quantity is large. The disadvantages are as follows: the existing synergistic treatment amount is large, the influence on the cement kiln capacity is large, the comprehensive benefit of a cement enterprise is not favorably obtained, the benefit driving force is reduced, the existing basic saturation is realized, and the growth amount is not large; in addition, the requirement on the content of heavy metals is strict, and the proportion is strictly controlled; finally, heavy metals enter a concrete building to be diluted and cured, and can be leached into water and soil after a long time, so that the environment is influenced.
Incineration disposal: to be pretreated and homogenized and enter a professional incinerator for incineration disposal. The advantages are that: all kinds of hw17 sludge can be sent to an incinerator for disposal. The disadvantages are as follows: a professional incineration enterprise is built, the equipment investment is large, and a tail gas treatment system needs to be matched subsequently; the sludge residue after incineration still needs professional treatment, and the treatment is not thorough; the process equipment and the operation are complex, and professional personnel are required to be equipped; the disposal cost is high.
Curing and landfill disposal: and after curing, filling the mixture into a special landfill. The advantages are that: all varieties hw17 sludge can be landfilled for curing. The disadvantages are as follows: the curing and landfill costs are high; a professional rigid landfill is needed, and the treatment in a common landfill cannot be realized; the sludge is actually kept, and the risk of environmental pollution caused by leaching after a long time is not eliminated; the professional rigid landfill site is few, and the large amount of hw17 sludge is not filled in the landfill.
Carrying out vitrification treatment in a plasma furnace: and (4) entering a plasma furnace, and adding other ingredients at high temperature to form glass body solidification. The advantages are that: the solidification is complete, and the variety of the hw17 sludge can be treated. The disadvantages are as follows: professional equipment needs to be invested, and the investment is huge; the plasma furnace has low power and low handling capacity; the disposal cost is high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a novel process method for cooperatively treating dangerous waste hw17 by a sintering machine aiming at the defects of the prior art.
The invention realizes the purpose through the following technical scheme: a new process method for the collaborative disposal of hazardous waste hw17 by a sintering machine is disclosed, wherein: the method comprises the following steps:
(1) and (3) transportation: the surface treatment waste hw17 is transported to a closed bunker in a closed way;
(2) mixing in proportion: transporting the surface treatment waste hw17 in the closed bunker into a mixing chamber, and mixing the surface treatment waste hw17 with sintering raw materials to obtain a sintering mixture, wherein the content of the surface treatment waste hw17 is less than 5% of the sintering mixture;
(3) and (3) sintering: and conveying the sintering mixture to a sintering furnace for sintering to obtain a finished sintered ore product.
By mixing the surface treatment waste hw17 into the sintering raw material for sintering, the surface treatment waste hw17 is fully utilized without changing the original process of the sintering machine.
As a further optimization scheme of the invention, the content of the surface treatment waste hw17 is 0.2% of the sinter mix.
As a further optimization of the invention, the transportation comprises the following steps:
(1.1) closed transportation: enclosing and transporting the bagged surface treatment waste hw17 to a designated site by an automobile;
(1.2) transferring: conveying the bagged surface treatment waste hw17 to the upper part of a storage bin through an electric single-beam crane;
(1.3) centralized collection: the surface treatment waste hw17 was poured into a silo through a can or bag breaker at the upper part of the silo, which was capped at the top.
As a further optimization of the present invention, the mixing comprises the following steps:
(2.1) weighing: transporting the surface treatment waste hw17 in the bin to a weighing place for weighing;
(2.2) mixing: the weighed surface treatment waste hw17 enters a mixing chamber to be mixed with the sintering raw material.
As a further optimization scheme of the present invention, the step (1.1) further comprises the following steps:
(1.11) rinsing: after the surface treatment waste hw17 is transported to a designated site in a closed manner, the site where the surface treatment waste hw17 is stacked is washed, and sewage enters a sewage collection system.
The surface treatment waste hw17 contains water, so a flushing sewage collection system is arranged, field flushing water enters a sewage collection pool, the field flushing water and the water or the objects which are flushed or thrown out due to hoisting and the like are precipitated together, clear water after precipitation enters a mixing chamber to be used as production water, and sludge in the precipitation pool directly enters a pull-type belt weigher to be weighed and recovered.
In a further optimized scheme, sewage in the sewage collection system enters the mixing chamber after being precipitated and is mixed with the sintering raw material and the surface treatment waste hw 17.
As a further optimization scheme of the invention, the processing temperature of the sintering mixture is 1350 ℃.
As a further optimization scheme of the invention, the temperature of the finished sintered ore is lower than 120 ℃, the particle diameter is 5-150mm, and the alkalinity is 1.8.
Compared with the prior art, the invention has the following beneficial effects:
the hw17 sludge mainly contains inorganic compounds such as SiO2, AL2O3, CaO, FeO and the like and a small amount of heavy metals, is consistent with blast furnace ironmaking and slagging materials, meets the basic requirements of a blast furnace on ironmaking raw materials such as ironmaking and slagging raw materials, and can be added into the blast furnace raw materials according to a certain proportion to meet the requirements of ironmaking and slagging. And the existing equipment of the existing iron and steel enterprises is utilized, the equipment investment is basically not needed, the treatment process technology and the operation requirement are simple, the energy is fully utilized, and the hw17 sludge is disposed in place. The iron element enters molten iron and is recycled; part of heavy metals are reduced into molten iron to become trace elements, so that the resource utilization is realized, and the improvement of the variety of the molten iron is facilitated; part of heavy metal enters blast furnace slag and is vitrified and solidified to be used as building materials such as cement, brick making and the like; the tail gas enters the existing environmental treatment equipment. The method has the advantages that the characteristic of large material use amount of the iron and steel enterprises is fully exerted, the treatment amount is large, the treatment time is along with the existing blast furnace iron-making process, the existing process of the iron and steel enterprises is not changed, and the treatment time is short.
By arranging the sewage collecting system, the wastewater is ensured not to be discharged outside, and the recycling of the sewage is realized,
drawings
FIG. 1 is a schematic flow chart of a new process for co-processing hazardous waste hw17 by a sintering machine according to the invention;
FIG. 2 is a schematic diagram of the transportation step in the new process for co-processing hazardous waste hw17 by a sintering machine according to the invention;
FIG. 3 is a schematic flow chart of the mixing steps in the new process for co-processing hazardous waste hw17 by the sintering machine.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Examples
The new process method for the sintering machine to cooperatively treat the hazardous waste hw17 comprises the steps of raw material or fuel transportation, batching, mixing, sintering, cooling, screening, finished product output and the like. Firstly, the surface treatment waste hw17 is transported to the project site by an automobile in a closed manner, the bagged surface treatment waste hw17 is transported to the upper part of a newly-built 50m3 stainless steel silo by an electric single-beam crane, the materials enter the silo through a can breaker or a bag breaker at the upper part of the silo, and the top of the silo is sealed by a sealing cover after the materials are loaded. Then, the hw17 in the bin enters a weighing system from the bottom, is proportionally mixed into the sintering mixture, enters a sintering mixture bin after mixing, enters a sintering machine for sintering, and is finally sintered into a sintered ore finished product. The process method can fully utilize the hw17 resource, utilizes the original sintering machine, basically does not need equipment investment, does not change the original process of the sintering machine, has simple process and operation and high economic cost, has higher treatment temperature, complete vitrification of inorganic oxides, complete decomposition of organic matters and complete combustion compared with other treatment enterprises through the treatment of the sintering machine, and can meet the first-level (excellent) requirement of the technical standard item of the high-quality iron sinter of the YB/T421-2014 industrial standard of the iron sinter.
As shown in fig. 1, the new process method for the sintering machine to cooperatively dispose the hazardous waste hw17 specifically comprises the following steps:
(1) and (3) transportation: the surface treatment waste hw17 is transported in a closed manner to a closed silo, specifically comprising the following steps, as shown in fig. 2.
(1.1) closed transportation: the bagged surface treatment waste hw17 is transported to a designated site in a closed manner by an automobile.
(1.11) rinsing: after the surface treatment waste hw17 is transported to a designated site in a closed manner, the site where the surface treatment waste hw17 is stacked is washed, and sewage enters a sewage collection system.
(1.2) transferring: the bagged surface treatment waste hw17 is transported to the upper part of the silo by an electric single-beam crane.
(1.3) centralized collection: the surface treatment waste hw17 was poured into a silo through a can or bag breaker at the upper part of the silo, which was capped at the top.
(2) Mixing in proportion: transporting the surface treatment waste hw17 in the closed bunker to a mixing chamber, and mixing the surface treatment waste hw17 with sintering raw materials to obtain a sintering mixture, wherein the content of the surface treatment waste hw17 is less than 5% of the sintering mixture, and the method specifically comprises the following steps, as shown in fig. 3.
In this example, the content of the surface treatment waste hw17 was 0.2% of the sinter mix.
(2.1) weighing: transporting the surface treatment waste hw17 in the bin to a weighing place for weighing;
(2.2) mixing: the weighed surface treatment waste hw17 enters a mixing chamber to be mixed with the sintering raw material.
(3) And (3) sintering: and conveying the sintering mixture to a sintering furnace for sintering to obtain a finished sintered ore product. The treatment temperature in the sintering furnace is 1350 ℃, the temperature of the sintered ore finished product is lower than 120 ℃, the particle diameter is 5-150mm, and the alkalinity is 1.8.
And (3) in the step (1.11), precipitating the sewage in the sedimentation tank, then feeding the precipitated sewage into the mixing chamber through a self-priming pump to be used as the process water, and directly feeding the sludge in the sedimentation tank into a pull-type belt scale to be weighed and recovered.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.
Claims (9)
1. A new process method for the collaborative disposal of hazardous waste hw17 by a sintering machine is characterized in that: the method comprises the following steps:
(1) and (3) transportation: the surface treatment waste hw17 is transported to a closed bunker in a closed way;
(2) mixing in proportion: transporting the surface treatment waste hw17 in the closed bunker into a mixing chamber, and mixing the surface treatment waste hw17 with sintering raw materials to obtain a sintering mixture, wherein the content of the surface treatment waste hw17 is less than 5% of the sintering raw materials;
(3) and (3) sintering: and conveying the sintering mixture to a sintering furnace for sintering to obtain a finished sintered ore product.
2. The new process method for the co-processing of the hazardous waste hw17 by the sintering machine according to claim 1, characterized in that: the content of the surface treatment waste hw17 is 0.2 percent of the sinter mix.
3. The new process method for the co-processing of the hazardous waste hw17 by the sintering machine according to claim 1, characterized in that: the transportation comprises the following steps:
(1.1) closed transportation: enclosing and transporting the bagged surface treatment waste hw17 to a designated site by an automobile;
(1.2) transferring: conveying the bagged surface treatment waste hw17 to the upper part of a storage bin through an electric single-beam crane;
(1.3) centralized collection: the surface treatment waste hw17 was poured into a silo through a can or bag breaker at the upper part of the silo, which was capped at the top.
4. The new process method for the co-processing of the hazardous waste hw17 by the sintering machine according to claim 3, characterized in that: the mixing comprises the following steps:
(2.1) weighing: transporting the surface treatment waste hw17 in the bin to a weighing place for weighing;
(2.2) mixing: the weighed surface treatment waste hw17 enters a mixing chamber to be mixed with the sintering raw material.
5. The new process method for the co-processing of the hazardous waste hw17 by the sintering machine according to claim 3, characterized in that: the step (1.1) further comprises the following steps:
(1.11) rinsing: after the surface treatment waste hw17 is transported to a designated site in a closed manner, the site where the surface treatment waste hw17 is stacked is washed, and sewage enters a sewage collection system.
6. The new process method for the co-processing of the hazardous waste hw17 by the sintering machine according to claim 3, characterized in that: and the sewage in the sewage collection system is precipitated and then enters the mixing chamber to be mixed with the sintering raw material and the surface treatment waste hw 17.
7. The new process method for the co-processing of the hazardous waste hw17 by the sintering machine according to claim 1, characterized in that: the processing temperature of the sinter mix was 1350 ℃.
8. The new process method for the co-processing of the hazardous waste hw17 by the sintering machine according to claim 1, characterized in that: the temperature of the finished sintered ore is lower than 120 ℃, the particle diameter is 5-150mm, and the alkalinity is 1.8.
9. The new process method for the co-processing of the hazardous waste hw17 by the sintering machine according to claim 4, characterized in that: and (3) weighing by using a pull-type belt scale in the step (2.1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110967211.2A CN113862466A (en) | 2021-08-23 | 2021-08-23 | Novel process method for co-processing hazardous waste hw17 by sintering machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110967211.2A CN113862466A (en) | 2021-08-23 | 2021-08-23 | Novel process method for co-processing hazardous waste hw17 by sintering machine |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10309556A (en) * | 1997-05-13 | 1998-11-24 | Takuma Co Ltd | Treatment of incineration residue |
| CN105821204A (en) * | 2016-05-30 | 2016-08-03 | 重庆伟晋环保科技有限公司 | Method for producing cold bound pellet agglomerate through solid waste and hazardous waste |
| CN106178885A (en) * | 2016-07-08 | 2016-12-07 | 重庆文渠环保科技有限公司 | The method utilizing step-by-step movement sintering technology harmlessness disposing solid waste |
| CN113122709A (en) * | 2021-04-16 | 2021-07-16 | 中冶长天国际工程有限责任公司 | Solid waste, sintering and pelletizing cooperative treatment process for guaranteeing iron grade |
| CN113151675A (en) * | 2021-04-16 | 2021-07-23 | 中冶长天国际工程有限责任公司 | Solid waste synergistic sintering and pelletizing treatment process |
-
2021
- 2021-08-23 CN CN202110967211.2A patent/CN113862466A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10309556A (en) * | 1997-05-13 | 1998-11-24 | Takuma Co Ltd | Treatment of incineration residue |
| CN105821204A (en) * | 2016-05-30 | 2016-08-03 | 重庆伟晋环保科技有限公司 | Method for producing cold bound pellet agglomerate through solid waste and hazardous waste |
| CN106178885A (en) * | 2016-07-08 | 2016-12-07 | 重庆文渠环保科技有限公司 | The method utilizing step-by-step movement sintering technology harmlessness disposing solid waste |
| CN113122709A (en) * | 2021-04-16 | 2021-07-16 | 中冶长天国际工程有限责任公司 | Solid waste, sintering and pelletizing cooperative treatment process for guaranteeing iron grade |
| CN113151675A (en) * | 2021-04-16 | 2021-07-23 | 中冶长天国际工程有限责任公司 | Solid waste synergistic sintering and pelletizing treatment process |
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Application publication date: 20211231 |