CN112626307A - Treatment process of hot-rolled oily iron oxide mud - Google Patents
Treatment process of hot-rolled oily iron oxide mud Download PDFInfo
- Publication number
- CN112626307A CN112626307A CN202011449880.2A CN202011449880A CN112626307A CN 112626307 A CN112626307 A CN 112626307A CN 202011449880 A CN202011449880 A CN 202011449880A CN 112626307 A CN112626307 A CN 112626307A
- Authority
- CN
- China
- Prior art keywords
- iron oxide
- hot
- unit
- rolled
- oxide sludge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/56—Manufacture of steel by other methods
- C21C5/562—Manufacture of steel by other methods starting from scrap
-
- 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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/248—Binding; Briquetting ; Granulating of metal scrap or alloys
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Sludge (AREA)
- Compounds Of Iron (AREA)
Abstract
The invention discloses a treatment process of hot-rolled oily iron oxide mud, belonging to the technical field of comprehensive utilization of steelmaking secondary resources, and comprising the steps of adding a degreasing agent into the hot-rolled oily iron oxide mud, carrying out primary cleaning on the hot-rolled oily iron oxide mud, carrying out secondary cleaning on the hot-rolled oily iron oxide mud, treating saponified sewage, circulating secondary industrial water and dewatering deoiled iron oxide; the treatment process does not involve oil sintering, so that smoke gas is not generated, the environment is not polluted, the iron oxide slag obtained by the treatment process can be processed into cold bonded pellets, the cold bonded pellets are used as a vanadium extraction coolant for a steelmaking system, and iron elements in the cold bonded pellets are recovered.
Description
Technical Field
The invention belongs to the technical field of comprehensive utilization of secondary resources in steelmaking, and particularly relates to a treatment process of hot-rolled oily iron oxide sludge.
Background
The iron-containing secondary resources generated by steel plants every year reach dozens of thousands of tons, and mainly comprise hot-rolled oil-containing iron oxide sludge, cold-rolled iron oxide powder, steelmaking enriched sludge, vanadium-extracting sludge and the like. Aiming at the recycling of the oil-containing iron oxide mud, the annual production amount is about 6000-8000 tons, the total iron content reaches 70 percent, at present, the oil-containing iron oxide mud is mainly utilized by a sintering method, and as the oil-containing iron oxide mud is clinker, the oil-containing iron oxide mud returned to a raw material yard to serve as a sintering part of raw materials has certain influence on the yield and the quality of sintering ores, and the economical efficiency is also poor. At present, the oily iron oxide mud is recycled by back sintering, and the oily iron oxide mud needs to be aired in the open air if being directly used by back sintering, so that the oily iron oxide mud is extremely easy to cause environmental pollution, needs a large amount of fuel, has long treatment time and large energy consumption, and is uneconomical due to small treatment capacity in unit time. If the sludge is directly discharged into a sewage treatment tank for deoiling treatment, a larger stirring device needs to be arranged, the required stirring time is longer, and the precipitated iron oxide sludge needs to be extruded by special large-scale sludge extruding equipment, so that the treatment process is complex.
Disclosure of Invention
Aiming at the problems of the existing treatment process of hot-rolled iron oxide mud, the invention provides a treatment process of hot-rolled oily iron oxide mud.
The technical scheme of the invention is as follows: a treatment process of hot-rolled oily iron oxide sludge comprises the steps of adding a degreasing agent into the hot-rolled oily iron oxide sludge, carrying out primary cleaning on the hot-rolled oily iron oxide sludge, carrying out secondary cleaning on the hot-rolled oily iron oxide sludge, treating saponified sewage, carrying out secondary industrial water circulation and removing water from deoiled iron oxide.
Further, the first washing of the hot-rolled oil-containing iron oxide mud and the second washing of the hot-rolled oil-containing iron oxide mud are stirred by a crawler excavator.
Further limiting, the device for treating the saponified sewage comprises a filtering unit, an air flotation unit, a biochemical unit and a secondary precipitation unit which are sequentially communicated;
the upper part of the secondary precipitation unit is communicated with an air stripping unit which is communicated with the biochemical unit; the lower part of the secondary precipitation unit is communicated with a concentration unit, and the concentration unit is communicated with a filter pressing unit, the biochemical unit and a dry slag outward transportation unit;
the filtering unit is communicated with the dry slag outward transportation unit; the air flotation unit is communicated with the concentration unit.
Further, the air flotation unit comprises a first-stage air flotation and a second-stage air flotation which are connected in parallel or in series.
Further limited, the degreasing agent is a dry-based alkaline degreasing agent.
Further limiting, the process of adding the oil removing agent into the hot-rolled iron oxide sludge is carried out in a treatment pool, and the inclination angle of the treatment pool in the length direction is 5 degrees.
Further limiting, the stirring time in the first cleaning process of the hot-rolled oil-containing iron oxide mud is 20-30 minutes, and the precipitation time is 2-3 hours.
Further limiting, the stirring time in the second cleaning process of the hot-rolled oil-containing iron oxide mud is 10-20 minutes, and the precipitation time is 2-3 hours.
Further limiting, the process of removing water from the iron oxide after deoiling is direct airing, and the inclination angle of the airing ground is 10 degrees.
Further limiting, the addition amount of the dry-based alkaline degreasing agent is 0.8-1% of the total mass of the hot-rolled oil-containing iron oxide mud.
Compared with the prior art, the invention has the beneficial effects that: the treatment process does not involve oil sintering, so that smoke gas is not generated, the environment is not polluted, the iron oxide slag obtained by the treatment process can be processed into cold bonded pellets, the cold bonded pellets are used as a vanadium extraction coolant for a steelmaking system, and iron elements in the cold bonded pellets are recovered.
The treatment process adopts the crawler excavator for stirring, the hot-rolled iron oxide mud can be fully dispersed and fully mixed with the degreasing agent to achieve the effect of degreasing, and the crawler excavator is not specially used for stirring, so that when the treatment process is suspended and is not used any more, the crawler excavator can also be used in other processes to realize recycling.
The treatment process has the advantages of short treatment time and low treatment cost.
Drawings
FIG. 1 is a flow chart of an apparatus for treating saponified wastewater;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are described in detail and completely, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments of the present invention. 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.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Example 1
A treatment process of hot-rolled oily iron oxide sludge comprises the steps of adding a degreasing agent into the hot-rolled oily iron oxide sludge, carrying out primary cleaning on the hot-rolled oily iron oxide sludge, carrying out secondary cleaning on the hot-rolled oily iron oxide sludge, treating saponified sewage, carrying out secondary industrial water circulation and removing water from deoiled iron oxide.
Wherein, add degreaser to the hot-rolling oiliness iron oxide mud: the used chemical feeding device is arranged at an industrial water tank with the gradient of 30 degrees, the industrial water tank is communicated with an industrial water system and a hot-rolled iron oxide mud treatment tank, the water flow is 200t/h, the degreasing agent is a market dry-based alkaline degreasing agent, the addition amount is 0.8-1% of the total amount of the hot-rolled oily iron oxide mud, the addition amount of water can reach 100mm over the hot-rolled oily iron oxide mud, and the degreasing rate can be more than 85%.
Wherein the hot-rolled oily iron oxide sludge is arranged in a hot-rolled iron oxide sludge treatment tank, the size length, width and height of the hot-rolled iron oxide sludge treatment tank are respectively 15m, 10m and 2m, a 5-degree slope is arranged from the length direction to a retaining wall so as to facilitate sewage pumping, the total volume number of the treatment tank is 300 cubic meters, the treatment tank is of a reinforced concrete structure and is impermeable, and the volume density of the hot-rolled iron oxide slag is 1.83t-1.90t/m3The treatment tank can contain 549-570 tons of hot-rolled oil-containing iron oxide sludge, the treatment depth is 30 percent of the total capacity in order to prevent splashing in the stirring process, the treatment tank can meet the treatment of 164-171 tons of oil-containing iron oxide sludge each time, and the treatment capacity can realize the treatment of the hot-rolled oil-containing iron oxide sludge generated in one week of a certain steel plant.
Wherein, shift hot rolling oiliness iron oxide mud to the in-process of hot rolling iron oxide mud treatment trough and adopt the tip truck, the transportation stacks up the various strip cloth of antiseep and shelters from in order to prevent to leak at carriage edge position.
Wherein, the first cleaning of the hot-rolled oil-containing iron oxide mud: stirring by adopting a crawler excavator, treating for 20-30 minutes, precipitating the ferric oxide mud for 2-3 hours, and pumping the saponified sewage into a sewage treatment tank by adopting a water pump (pumping speed: 100 t/h).
And the second cleaning of the hot-rolled oil-containing iron oxide mud: stirring by adopting a crawler excavator, adding industrial water to overflow the ferric oxide mud by 100mm, continuously stirring by adopting the crawler excavator, treating for 10-20 minutes, precipitating the ferric oxide mud for 2-3 hours, and pumping the saponified sewage to a sewage treatment tank by adopting a water pump (pumping speed: 100 t/h).
And the second cleaning of the hot-rolled oil-containing iron oxide mud: stirring by adopting a crawler excavator, adding industrial water to overflow the ferric oxide mud by 100mm, continuously stirring by adopting the crawler excavator, treating for 10-20 minutes, precipitating the ferric oxide mud for 2-3 hours, and pumping the saponified sewage to a sewage treatment tank by adopting a water pump (pumping speed: 100 t/h).
The main organic pollutants in the saponified wastewater are oil, glycerol and the like, and exist in the states of floating oil, emulsified oil, dispersed oil, dissolved oil and the like, so that the wastewater has high oil content and higher COD, BOD, SS and the like. The effluent enters a two-stage contact oxidation tank for further treatment, and the effluent reaches the secondary discharge standard of Integrated wastewater discharge Standard (GB8978-1996) after the treatment by the process.
As shown in figure 1, the device for treating the saponified sewage comprises a filtering unit, an air flotation unit, a biochemical unit and a secondary precipitation unit which are communicated in sequence; the upper part of the secondary precipitation unit is communicated with a gas stripping unit which is communicated with a biochemical unit; the lower part of the secondary precipitation unit is communicated with a concentration unit, and the concentration unit is communicated with a filter pressing unit, a biochemical unit and a dry slag outward transportation unit; the filtering unit is communicated with the dry slag outward transportation unit; the air flotation unit is communicated with the concentration unit and comprises a first-stage air flotation and a second-stage air flotation which are connected in parallel or in series, and in the actual application process, the parallel connection or the series connection between the first-stage air flotation and the second-stage air flotation is specifically controlled by opening and closing valves arranged on respective feeding pipelines and discharging pipelines.
In this embodiment, the filtration unit is a PE pipe, an adjusting tank is disposed between the filtration unit and the air flotation unit, the biochemical unit is a biochemical tank, the secondary sedimentation unit is a secondary sedimentation unit tank, the concentration unit is a concentration tank, the filter pressing unit is a belt filter press, the bottom of the secondary sedimentation unit tank is backflow sludge, and the upper portion of the secondary sedimentation unit tank is water, and the backflow sludge is used for being discharged or returned to the treatment process of the hot-rolled oily iron oxide sludge.
Wherein, the second-stage industrial water circulation: and collecting the secondary industrial water which reaches the standard after treatment, and reusing the secondary industrial water for cleaning the hot-rolled oil-containing iron oxide sludge to realize the recycling of the industrial water.
The water removal of the iron oxide after deoiling is carried out in a drying mode, the length, the width and the height of a drying site of the hot-rolled iron oxide slag are respectively 10m, 5m and 4m, the top of the drying site is covered by a glazed tile, a 10-degree slope is arranged from the length direction to an outlet so that the remaining water can be drained to a seepage-proof ditch through gravity, a certain amount of water accumulated in the ditch is pumped to a saponification treatment pool through a water pump, the drying site contains 200 cubic meters in total, the drying site is of a reinforced concrete structure and is seepage-proof, the volume density of the hot-rolled iron oxide slag is 1.83t-1.90/m3, and 366-.
Example 2
In this embodiment, hot-rolled oily iron oxide sludge 152t is transported from a hot-rolled plate mill in a certain steel mill, and the production is one week, 3 workers, 1 excavator driver and 2 process operators, the bulk density of the hot-rolled oily iron oxide sludge is 1.88t/m3, and the hot-rolled oily iron oxide sludge is poured into a hot-rolled oily iron oxide sludge treatment tank, and the treatment process is as follows: the method comprises the following steps of adding a degreasing agent into hot-rolled oil-containing iron oxide mud in an amount of 0.8 percent and 1.2t, adding water into the hot-rolled oil-containing iron oxide mud to flow over 100mm, adding water into the hot-rolled oil-containing iron oxide mud for 28 minutes, cleaning for the first time, treating the hot-rolled oil-containing iron oxide mud for 23 minutes, precipitating the hot-rolled oil-containing iron oxide mud for 2 hours, pumping water into saponification sewage for the first time for 20 minutes, cleaning for the second time, adding cleaning water into the hot-rolled oil-containing iron oxide mud for 26 minutes, treating the hot-rolled oil-containing iron oxide mud for 10 minutes, precipitating the hot-rolled oil:
TABLE 1 EXAMPLE 1 duration of treatment of hot-rolled oily iron oxide slag
The oil removal effect data are shown in table 2:
TABLE 2 oil-containing iron oxide slag oil-removing effect
As can be seen from tables 1 and 2, compared with the traditional baking process, the treatment process of the hot-rolled oily iron oxide mud has the advantages that the treatment time is greatly reduced, the treatment cost is superior to that of the baking process, the oil removal rate is equivalent, and the treatment process has good application effect in steel plants.
Example 3
In this example, 170t of oily iron oxide sludge is transported from a hot rolling plate mill in a certain steel mill, 3 workers are assigned to the labor, 1 excavator driver and 2 process operators, the bulk density of the hot rolling oily iron oxide sludge is 1.88t/m3, and the hot rolling oily iron oxide sludge is poured into a hot rolling oily iron oxide sludge treatment pool, and the treatment process comprises the following steps: 1% of the total amount of the oil removing agent added into the hot-rolled oil-containing iron oxide sludge, 1.7t, 100mm of water is added to overflow the hot-rolled oil-containing iron oxide sludge, the water adding time is 30 minutes, the first cleaning is carried out, the track excavator treatment time is 25 minutes, the hot-rolled oil-containing iron oxide sludge is precipitated for 2.5 hours, the water pumping time of the first saponification sewage is 25 minutes, the second cleaning is carried out, the water adding time is 26 minutes, the track excavator treatment time is 10 minutes, the precipitation is 2.5 hours, and the water pumping time of the saponification sewage is 23 minutes, and the statistical time is shown in the following table 3:
TABLE 3 example 2 treatment duration of oil-containing iron oxide slag
The oil removal effect data are shown in table 4:
TABLE 4 oil-containing iron oxide slag oil-removing effect
As can be seen from tables 3 and 4, compared with the traditional baking process, the treatment process of the hot-rolled oily iron oxide mud has the advantages that the treatment time is greatly reduced, the treatment cost is superior to that of the baking process, the oil removal rate is basically equivalent, and the treatment process has good application effect in steel plants.
In conclusion, the method can rapidly process the amount of the iron oxide slag generated in one week in a certain steel plant, has the characteristics of simple operation, small investment, small labor investment, environmental protection, energy conservation and the like compared with the traditional baking process, and the processed iron oxide slag can be effectively used as a coolant in the vanadium extraction process of steel making, so that the iron element in the iron oxide slag is recovered to the maximum extent, and the environmental protection utilization of secondary resources is realized.
The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.
Claims (10)
1. A treatment process of hot-rolled oily iron oxide sludge is characterized by comprising the steps of adding a degreasing agent into the hot-rolled oily iron oxide sludge, carrying out primary cleaning on the hot-rolled oily iron oxide sludge, carrying out secondary cleaning on the hot-rolled oily iron oxide sludge, treating saponification sewage, circulating secondary industrial water and removing water from deoiled iron oxide.
2. The process of claim 1, wherein the first washing of the hot-rolled oily iron oxide sludge and the second washing of the hot-rolled oily iron oxide sludge are stirred by a crawler excavator.
3. The process for treating the hot-rolled oily iron oxide sludge according to claim 1 or 2, wherein the device for treating the saponification wastewater comprises a filtering unit, an air flotation unit, a biochemical unit and a secondary precipitation unit which are sequentially communicated;
the upper part of the secondary precipitation unit is communicated with an air stripping unit which is communicated with the biochemical unit; the lower part of the secondary precipitation unit is communicated with a concentration unit, and the concentration unit is communicated with a filter pressing unit, the biochemical unit and a dry slag outward transportation unit;
the filtering unit is communicated with the dry slag outward transportation unit; the air flotation unit is communicated with the concentration unit.
4. The process of claim 3, wherein the air flotation unit comprises a primary air flotation and a secondary air flotation connected in parallel or in series.
5. The process according to claim 1, wherein the oil removal agent is a dry-based alkaline oil removal agent.
6. The process according to claim 1, wherein the addition of the oil-removing agent to the hot-rolled iron oxide sludge is carried out in a treatment tank having an inclination angle of 5 ° in the longitudinal direction.
7. The process for treating hot-rolled oily iron oxide sludge according to claim 2, wherein the stirring time in the first washing process of the hot-rolled oily iron oxide sludge is 20 to 30 minutes, and the precipitation time is 2 to 3 hours.
8. The process for treating hot-rolled oily iron oxide sludge according to claim 2, wherein the second washing of the hot-rolled oily iron oxide sludge is carried out while stirring for 10 to 20 minutes and precipitating for 2 to 3 hours.
9. The process according to claim 1, wherein the de-watering of the de-oiled iron oxide is carried out by direct air-drying at an angle of 10 ° to the drying ground.
10. The process for treating hot-rolled oily iron oxide sludge according to claim 5, wherein the addition amount of the dry-based alkaline degreasing agent is 0.8-1% of the total mass of the hot-rolled oily iron oxide sludge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011449880.2A CN112626307A (en) | 2020-12-09 | 2020-12-09 | Treatment process of hot-rolled oily iron oxide mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011449880.2A CN112626307A (en) | 2020-12-09 | 2020-12-09 | Treatment process of hot-rolled oily iron oxide mud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112626307A true CN112626307A (en) | 2021-04-09 |
Family
ID=75310184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011449880.2A Pending CN112626307A (en) | 2020-12-09 | 2020-12-09 | Treatment process of hot-rolled oily iron oxide mud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112626307A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5494170A (en) * | 1978-01-06 | 1979-07-25 | Nippon Steel Corp | Wet process treatment method for recovering oil from oil-containing hot rolled sludge |
| JP2003027147A (en) * | 2001-07-19 | 2003-01-29 | Nippon Steel Corp | Degreasing method for scale |
| CN101643300A (en) * | 2009-09-01 | 2010-02-10 | 浙江大学 | Treatment method of comprehensive waste water of metal processing |
| CN101935110A (en) * | 2010-08-26 | 2011-01-05 | 北京首钢国际工程技术有限公司 | Method for treating and recycling hot-rolling high-oil-containing waste water in iron and steel plant |
| CN102557385A (en) * | 2012-02-08 | 2012-07-11 | 韶关市雅鲁环保实业有限公司 | Treatment process of sludge from turbid circulating system of steel enterprise hot rolling factory |
| RU2012142453A (en) * | 2012-10-05 | 2014-04-10 | Геннадий Алексеевич Фарнасов | METHOD FOR JOINT CLEANING FROM OIL OILED WITH IRON / STEEL CHIP AND SCALES OF ROLLING Sludge |
| CN103820637A (en) * | 2014-03-10 | 2014-05-28 | 韶关市雅鲁环保实业有限公司 | Equipment and process for treating sludge of turbid circulating system of hot rolling plant of iron and steel enterprise |
| WO2016034884A1 (en) * | 2014-09-05 | 2016-03-10 | Darlow Lloyd & Sons Limited | Reuse of by-products from metallurgical processes, processing of waste materials and products thereof |
| CN106810028A (en) * | 2015-12-02 | 2017-06-09 | 鞍钢股份有限公司 | Hot rolling oil sludge air floatation cleaning and deoiling system and deoiling method |
| CN106809936A (en) * | 2015-12-02 | 2017-06-09 | 鞍钢股份有限公司 | Air floatation cleaning and deoiling system and method for hot rolling advection tank |
| CN110904462A (en) * | 2019-12-19 | 2020-03-24 | 钢城集团凉山瑞海实业有限公司 | Oil removing agent and using method thereof |
| CN211595254U (en) * | 2019-05-17 | 2020-09-29 | 河南普绿环保科技有限公司 | Steel mill sewage treatment system |
-
2020
- 2020-12-09 CN CN202011449880.2A patent/CN112626307A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5494170A (en) * | 1978-01-06 | 1979-07-25 | Nippon Steel Corp | Wet process treatment method for recovering oil from oil-containing hot rolled sludge |
| JP2003027147A (en) * | 2001-07-19 | 2003-01-29 | Nippon Steel Corp | Degreasing method for scale |
| CN101643300A (en) * | 2009-09-01 | 2010-02-10 | 浙江大学 | Treatment method of comprehensive waste water of metal processing |
| CN101935110A (en) * | 2010-08-26 | 2011-01-05 | 北京首钢国际工程技术有限公司 | Method for treating and recycling hot-rolling high-oil-containing waste water in iron and steel plant |
| CN102557385A (en) * | 2012-02-08 | 2012-07-11 | 韶关市雅鲁环保实业有限公司 | Treatment process of sludge from turbid circulating system of steel enterprise hot rolling factory |
| RU2012142453A (en) * | 2012-10-05 | 2014-04-10 | Геннадий Алексеевич Фарнасов | METHOD FOR JOINT CLEANING FROM OIL OILED WITH IRON / STEEL CHIP AND SCALES OF ROLLING Sludge |
| CN103820637A (en) * | 2014-03-10 | 2014-05-28 | 韶关市雅鲁环保实业有限公司 | Equipment and process for treating sludge of turbid circulating system of hot rolling plant of iron and steel enterprise |
| WO2016034884A1 (en) * | 2014-09-05 | 2016-03-10 | Darlow Lloyd & Sons Limited | Reuse of by-products from metallurgical processes, processing of waste materials and products thereof |
| CN106810028A (en) * | 2015-12-02 | 2017-06-09 | 鞍钢股份有限公司 | Hot rolling oil sludge air floatation cleaning and deoiling system and deoiling method |
| CN106809936A (en) * | 2015-12-02 | 2017-06-09 | 鞍钢股份有限公司 | Air floatation cleaning and deoiling system and method for hot rolling advection tank |
| CN211595254U (en) * | 2019-05-17 | 2020-09-29 | 河南普绿环保科技有限公司 | Steel mill sewage treatment system |
| CN110904462A (en) * | 2019-12-19 | 2020-03-24 | 钢城集团凉山瑞海实业有限公司 | Oil removing agent and using method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105016592A (en) | Slurry recycling circulation system and slurry recycling method thereof | |
| CN105296704A (en) | Treatment system and process of applying sintering flue gas to dust removal water of converter | |
| CN101805108A (en) | Device and method for treating sludge underwater | |
| CN1824812A (en) | Technique and equipment for processing blast furnace smelting slag | |
| CN101935110B (en) | Method for treating and recycling hot-rolling high-oil-containing waste water in iron and steel plant | |
| CN101734776B (en) | Method for processing and utilizing wastewater and waste material in steel production and processing system thereof | |
| CN106809899B (en) | Air floatation oil removal system and oil removal method for hot rolling advection pool | |
| CN112626307A (en) | Treatment process of hot-rolled oily iron oxide mud | |
| CN204897676U (en) | Mud recycle circulation system | |
| CN104609635A (en) | Mobile well flushing waste water processing system | |
| CN106809912A (en) | Hot rolling oil sludge air floatation oil removal system and oil removal method | |
| CN207973610U (en) | A kind of sewage disposal system suitable for aggregate production | |
| CN102557386A (en) | Sludge disposal method for circulating water of coal gas station of alumina plant | |
| CN103463836B (en) | Combined sediment collector for ash water of ash field and collection method thereof | |
| CN207313421U (en) | It is a kind of can high magnification numbe continuous concentration sludge device | |
| CN106809936B (en) | Air floatation cleaning and deoiling system and method for hot rolling advection tank | |
| CN207596627U (en) | Auxiliary matchmaker's electrochemistry macromolecule sewage-treatment plant | |
| CN218931886U (en) | Coal-containing wastewater treatment device | |
| CN207774889U (en) | Polymetallic ore mountain waste water fluorine ion processing unit | |
| CN216786171U (en) | Slag-water mixture treatment system | |
| CN209575989U (en) | Draining sediment system and slag disposal system suitable for drum process slag treatment process | |
| CN217811330U (en) | Recycling system and mining system are collected to mine initial stage rainwater | |
| CN204803145U (en) | Retrieval and utilization device is handled to chlor -alkali strong brine | |
| CN210683404U (en) | High-efficient thick liquid greasy dirt piece-rate system | |
| CN204281522U (en) | Wool yarn factory Sewage treatment systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210409 |
|
| RJ01 | Rejection of invention patent application after publication |