CN114807462A - Method for hot-rolling oil sludge through hot-disintegration treatment of steel slag - Google Patents
Method for hot-rolling oil sludge through hot-disintegration treatment of steel slag Download PDFInfo
- Publication number
- CN114807462A CN114807462A CN202210314756.8A CN202210314756A CN114807462A CN 114807462 A CN114807462 A CN 114807462A CN 202210314756 A CN202210314756 A CN 202210314756A CN 114807462 A CN114807462 A CN 114807462A
- Authority
- CN
- China
- Prior art keywords
- hot
- oil sludge
- slag
- rolling oil
- pit
- 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.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method for hot-rolling oil sludge treatment by utilizing steel slag in a hot-closed manner, and belongs to the technical field of comprehensive utilization of resources. According to the method, after the covering and soaking operation of slag charging is completed in the hot stuffy pit, wet hot rolling oil sludge is pumped into the hot stuffy pit from a hot stuffy cover water inlet port through a pipeline, slag stuffiness is implemented, oil content of the hot rolling oil sludge is cracked in the slag stuffy process to realize oil content removal, carbon-containing and hydrogen-containing substances after cracking are used as reducing agents to reduce metal oxides in the oil sludge into metal simple substances to enter the steel slag, and the metal simple substances are returned to steel making, sintering and other processes for recycling along with subsequent steel slag processing and magnetic separation. The method effectively solves the problem that the oil content of the hot rolling oil sludge is high and the internal process is difficult to utilize, thereby realizing the cooperative treatment and utilization of the steel slag and the hot rolling oil sludge and providing a new way for the internal resource utilization of the hot rolling oil sludge.
Description
Technical Field
The invention belongs to the technical field of comprehensive utilization of resources, and particularly relates to a method for treating hot rolling oil sludge by utilizing steel slag through hot disintegration.
Background
The hot-rolling turbid circulating water is mainly used for removing phosphorus by high-pressure water in billet rolling and cooling and washing a rolling mill, a roller and a roller way, and in the processes, iron scales falling off from the surface of a billet and lubricating oil and lubricating grease for lubricating and cooling rolling equipment enter turbid circulating water together. The general treatment method of the hot rolling turbid circulating water is a three-stage treatment method, namely large-particle iron scales are removed through a cyclone well, then the large-particle iron scales enter an advection pool to be precipitated to remove small-particle iron mud and impurities, water discharged from the advection pool is filtered, and then clear water is recycled, wherein sediment in the advection pool is hot rolling oil mud.
The content of dry base iron of the hot-rolled oil sludge is more than 60 percent, the content of dry base oil is 5 to 20 percent, and the oil content is high, so that the oil sludge is difficult to directly return to internal processes such as sintering, steel making and the like for utilization, and domestic steel enterprises generally adopt stockpiling or outsourcing treatment and the like to treat at present, so that the waste of ferrite resources is caused, and high economic cost is paid.
Through search, relevant patents are disclosed for recycling hot rolling oil sludge. For example, chinese patent application No. 201510867507.1 (entitled "hot rolling advection pool air flotation de-oiling system and de-oiling method") discloses a method for removing oil from the surface of fine iron scale in water by stirring, wherein a stirrer is disposed between the water inlet of the hot rolling advection pool and the water distribution wall; dissolved air water releasers are respectively arranged between the water distribution wall and the stirrer and in the advection pool, oil drops are floated to the surface of the advection pool by micron-sized bubbles generated by the dissolved air releasers, and waste oil is collected to a storage tank by an oil skimmer; after oil is removed, the fine iron scales deposited at the bottom of the advection pool are pushed into a mud bucket by a lower scraper of the oil and slag scraping machine, so that the separation of oil and iron mud and the subsequent recycling of the iron mud are realized. The method has high investment and operation cost, and the generated waste oil is difficult to utilize.
For another example, in the patent with application number 201710283325.9 (named as a method for treating oil-containing sludge of rolled steel), quicklime powder is added into the oil-containing sludge of rolled steel and mixed, then the mixture is put into a rotary kiln reactor for low-temperature gasification and deoiling treatment, combustible flue gas discharged from the rotary kiln reactor enters a secondary combustion chamber for combustion, generated hot flue gas returns to the rotary kiln reactor to serve as an external heating type heat source of the rotary kiln reactor, and deoiled oil-containing sludge residue of rolled steel is used as an iron-making sintering raw material. The method uses the rotary kiln to treat the oily sludge, and the iron content of the sludge is too high, so that the ring formation of the rotary kiln is easily caused, and the production stability of the rotary kiln is influenced.
For another example, in a patent with application number 201510914215.9 (named as a process for treating rolled steel oily sludge by using steel slag waste heat), steel slag which is more than one third of the volume of a slag pool is paved in a hot slag disintegrating pool, the surface temperature of the steel slag is controlled to be more than 500 ℃, rolled steel oil sludge is transported to a hot slag disintegrating field, the oil sludge is poured into the hot slag disintegrating pool, the slag is paved uniformly, the slag is continuously fed into the slag pool, high-temperature liquid steel slag is poured on the upper part of the uniformly paved rolled steel oil sludge, the process is carried out according to a normal hot slag disintegrating process after 30min, and after the hot slag disintegrating process is finished, iron in the steel slag is selected and utilized according to a normal magnetic separation process of a steel slag iron selecting process. The method comprises the steps of pouring oil sludge into a hot slag disintegrating pool with the temperature of more than 500 ℃ to be uniformly spread, wherein the process is open operation, and the oil sludge generates a large amount of black oil smoke and combustion flame at high temperature, so that environmental protection and potential safety hazards exist; the paving process will also increase the complexity of the job, reducing the efficiency of the job.
Disclosure of Invention
1. Problems to be solved
The invention aims to provide a method for treating hot-rolled oil sludge by utilizing steel slag through hot disintegration, which aims to solve the problem that the hot-rolled oil sludge is difficult to recycle in internal processes of steel enterprises due to high oil content.
2. Technical scheme
In order to solve the problems, the technical scheme adopted by the invention is as follows:
according to the method for treating the hot-rolled oil sludge by utilizing the steel slag through hot disintegration, the hot-rolled oil sludge is introduced to carry out slag disintegration after the hot disintegration pit is covered and soaked, the hot-rolled oil sludge is treated by effectively utilizing the waste heat of the steel slag, no oil smoke and combustion flame are generated in the whole process, and no environmental protection and potential safety hazard exist.
Furthermore, the method specifically comprises the following steps:
firstly, transporting sediment (wet hot rolling oil sludge) in an advection pool of a hot rolling turbid ring system to a hot rolling oil sludge receiving pool in a steel slag hot stuffiness area by adopting a pipeline or a tank car for storage;
step two, before the hot stuffy pit finishes slag loading operation and heats the stuffy cover, uniformly stirring the wet hot rolling oil sludge in the receiving tank; the stirring device is arranged in the receiving pool, and the stirring device is directly started, so that the hot rolling oil sludge can be uniformly stirred before being injected;
thirdly, after the slag loading operation is completed in the hot stuffy pit, covering and soaking, pumping the uniformly stirred wet hot rolling oil sludge in the receiving tank into the hot stuffy pit through a pipeline from a hot stuffy cover water inlet interface, and performing slag stuffiness;
step four, when the temperature in the hot stuffy pit is reduced to be less than 450 ℃, switching to use circulating water of a circulating water system from using wet hot rolling oil sludge, and spraying water and stuffy slag;
and step five, after slag smoldering is finished, opening a hot smoldering cover and discharging slag, performing subsequent processing and magnetic separation on the steel slag according to a normal process flow, and returning to internal processes of sintering, steel making and the like for utilization after magnetic separation because iron in the hot rolling oil sludge enters the steel slag. The treatment method can effectively provide a treatment method for the hot-rolled oil sludge, fully utilizes the existing treatment conditions, has small investment improvement and simple and convenient treatment process, and effectively removes and utilizes the oil in the oil sludge.
Furthermore, the water content of the wet hot-rolled oil sludge precipitated in the advection pool is controlled to be more than or equal to 80%, and under the water content, the fluidity of the oil sludge is good, so that the subsequent conveying is facilitated, and the slag smoldering effect is ensured.
Furthermore, in the third step, when the temperature in the pit after soaking is 700-800 ℃, hot rolling oil sludge is introduced into the hot stuffy pit, and a stuffy slag production line of the hot rolling oil sludge is executed according to a water spraying stuffy slag system. Specifically, in order to ensure the hot stuffiness effect of the hot rolling oil sludge on the steel slag and the treatment effect of the hot rolling oil sludge, the total amount of the hot rolling oil sludge is controlled to be 100m 3 ～150m 3 Total flow rate of 20m 3 /h～50m 3 /h。
Furthermore, in order to ensure the safety of the reaction in the hot stuffy pit and the sufficiency of oil content cracking when the hot-rolled oil sludge is in the hot stuffy steel slag, the flow rate of the oil sludge introduced at different temperatures is optimally designed, and particularly, when the temperature in the hot stuffy pit is 700-800 ℃, the flow rate of the hot-rolled oil sludge is 20m 3 /h～40m 3 H; when the temperature in the hot closed pit reaches 700 ℃, stopping introducing hot rolling oil sludge, and maintaining soaking for 50-70 min; after soaking, when the temperature in the hot closed pit is 600-700 ℃, the flow rate of the hot rolling oil sludge is 40m 3 /h～50m 3 H; when the temperature in the hot closed pit reaches 600 ℃, stopping introducing hot rolling oil sludge, and maintaining soaking for 50-70 min; after soaking, when the temperature in the hot closed pit is 450-600 ℃, the flow rate of the hot rolling oil sludge is 40m 3 /h～50m 3 H; and when the temperature in the hot closed pit reaches 450 ℃, stopping introducing the hot rolling oil sludge, and soaking for 50-70 min.
Furthermore, in the fourth step, when the temperature in the hot stuffy pit is more than or equal to 450 ℃, the oil content in the hot rolling oil sludge can be fully cracked and reduced by iron oxide, and when the temperature is less than 450 ℃, the oil content is not fully removed, so that the water spraying and slag stuffy are switched to use circulating water.
Furthermore, when the slag is sealed by water spraying, the flow speed of the circulating water is controlled to be 10m 3 /h～40m 3 /h。
It should be noted that, in the present invention, when steel slag is hot-smoldered with circulating water, since hot rolling sludge is used for smoldering the steel slag at the initial hot-smoldering of the steel slag, and the surface temperature of the steel slag is already reduced to 450 ℃ or lower, the flow rate of the circulating water in the first stage can be set to 30m when the slag is smoldered with the water spraying system of the present invention 3 /h～35m 3 Stopping water feeding after 1 hour of introduction, and soaking for 1 hour; the flow rate of the circulating water in the second stage can be set to 36m 3 /h～40m 3 Stopping water feeding after 1 hour of introduction, and soaking for 1 hour; and at the beginning of the third stage, the flow rate of the circulating water is sequentially reduced, the circulating water is still kept introduced for 1 hour, and the soaking is carried out for 1 hour until the surface of the steel slag is reduced to below 60 ℃.
Furthermore, in the fifth step, the magnetic separation induction intensity is controlled to be 100 mT-500 mT during magnetic separation.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the method for hot-disintegrating treatment of the hot-rolled oil sludge by using the steel slag, the wet hot-rolled oil sludge is directly used for hot-disintegrating slag flushing, on one hand, the hot-rolled oil sludge does not pass through the original filter pressing process, the working procedures are simplified, and the filter pressing cost of a turbid circulation system is effectively reduced; on the other hand, the wet hot-rolled oil sludge is used for hot stuffy slag flushing, namely hot-rolled turbid circulating water and hot stuffy slag flushing water are replaced, under the condition that the total water consumption is not changed, new water supplement is added to a turbid circulating system, the turbid circulating water quality is improved, and the medicament consumption cost of the turbid circulating system is reduced;
(2) according to the method for hot-rolling oil sludge treatment by utilizing steel slag through hot-rolling oil sludge, the hot-rolling oil sludge is introduced into the hot-rolling stuffy pit for stuffy slag, oil in the oil sludge is cracked at high temperature under the heat of the steel slag and a closed environment after covering, oil removal is realized, the cracked carbon-containing and hydrogen-containing substances are used as reducing agents, iron oxide in the oil sludge is reduced into metallic iron, iron in the oil sludge finally enters the steel slag for subsequent magnetic separation recycling, the problem that the oil content of the hot-rolling oil sludge is high and internal procedures are difficult to perform internal recycling is solved with low cost, the cooperative treatment and utilization of the steel slag and the hot-rolling oil sludge are realized, and a new way is provided for internal utilization of the hot-rolling oil sludge;
(3) according to the method for hot-disintegrating treatment of the hot-rolled oil sludge by using the steel slag, the process of disintegrating the slag by using the wet oil sludge is a capping and sealing operation, oil content can be fully cracked under the high-temperature and high-humidity environment, no oil smoke and combustion flame are generated, environmental protection and potential safety hazards are eliminated, and the method is more optimized.
Drawings
FIG. 1 is a schematic overall flow chart of a method for hot-closed treatment of hot-rolled oil sludge by using steel slag according to the invention;
Detailed Description
The invention is further described with reference to specific examples.
Example 1
As shown in fig. 1, the method for treating hot rolling sludge by utilizing steel slag hot disintegration in the embodiment specifically includes the following steps:
firstly, transporting sediment of an advection pool of a hot-rolled turbid ring system with the water content of 80% to a hot-rolled oil sludge receiving pool of a steel slag hot-stuffy area by adopting a pipeline or a tank car for storage.
And step two, before the hot stuffy pit finishes slag filling operation and is covered, starting a stirring device arranged in the receiving pool to stir the hot rolling oil sludge uniformly.
Step three, after the slag loading operation is finished in the hot stuffy pit, covering and soaking the slag, wherein the temperature in the hot stuffy pit is about 800 ℃, pumping wet hot rolling oil sludge uniformly stirred in the receiving tank into the hot stuffy pit through a pipeline from a water inlet port of the hot stuffy cover, and the flow rate of the hot rolling oil sludge is 30m 3 H; when the temperature in the hot closed pit is reduced to 700 ℃, stopping introducing hot rolling oil sludge, and maintaining uniform heating for 60 min; after soaking is finished, the temperature in the hot sealed pit is about 700 ℃, hot rolling oil sludge is continuously introduced, and the flow speed is 45m 3 H; when the temperature in the pit reaches 600 ℃, stopping introducing hot rolling oil sludge, and maintaining soaking for 60 min; after soaking, the temperature in the hot sealed pit is about 600 ℃, hot rolling oil sludge is continuously introduced, and the flow speed is 45m 3 H; and when the temperature in the hot closed pit is reduced to 450 ℃, stopping introducing the hot rolling oil sludge, and maintaining soaking for 60 min.
Step four, when the temperature in the hot stuffy pit is reduced to be less than 450 ℃, switching from using wet hot rolling oil sludge to using circulating water of a circulating water system, and continuing to spray water and stuffy slag according to the water spraying system of the invention, wherein the total range of the flow rate of the circulating water is 10m 3 /h～40m 3 /h。
And step five, after slag smoldering is finished, opening a slag smoldering cover and discharging slag, performing subsequent processing and magnetic separation on the steel slag, returning iron in the hot-rolled oil sludge into the steel slag after the iron enters the steel slag, performing magnetic separation, and performing internal recycling in the processes of sintering, steelmaking and the like.
In this example, the wet hot rolling sludge treatment capacity was 120m 3 Replacement of the stuffy slag fresh Water supplement amount 114m 3 The content of the hot rolling turbid circulating water suspended matters after replacement is reduced to 45.5mg/L from 60.8mg/L, the consumption of the medicament is reduced by 25%, and the filter pressing treatment capacity is reduced to 73 t/day from 145 t/day; the dry basis treatment capacity of the hot rolling oil sludge is 28.8t, the recovery capacity of iron element is 17.28t, the oil content of the large slag steel after treatment and recovery is 0%, and the oil content of the magnetic separation powder is 0.007%, so that the utilization requirements of the sintering return and steelmaking processes are completely met.
Example 2
Firstly, transporting sediment of an advection pool of a hot-rolled turbid ring system with the water content of 80% to a hot-rolled oil sludge receiving pool of a steel slag hot-stuffy area by adopting a pipeline or a tank car for storage.
And step two, before the hot stuffy pit finishes slag filling operation and is covered, starting a stirring device arranged in the receiving pool to stir the hot rolling oil sludge uniformly.
Step three, after the slag loading operation is finished in the hot stuffy pit, covering and soaking the slag, wherein the temperature in the hot stuffy pit is about 800 ℃, pumping wet hot rolling oil sludge uniformly stirred in the receiving tank into the hot stuffy pit through a pipeline from a water inlet port of the hot stuffy cover, and the flow rate of the introduced hot rolling oil sludge is 20m 3 H; when the temperature in the hot closed pit is reduced to 700 ℃, stopping introducing hot rolling oil sludge, and maintaining uniform heating for 60 min; after soaking, the temperature in the hot sealed pit is 700 ℃, hot rolling oil sludge is continuously introduced, and the flow speed is 40m 3 H; when the temperature in the hot closed pit reaches 600 ℃, stopping introducing hot rolling oil sludge, and maintaining uniform heating for 60 min; after soaking, the temperature in the hot sealed pit is about 600 ℃, hot rolling oil sludge is continuously introduced, and the flow speed is 40m 3 H; and when the temperature in the hot closed pit is reduced to 450 ℃, stopping introducing the hot rolling oil sludge, and maintaining soaking for 60 min.
Step four, when the temperature in the hot stuffy pit is reduced to be less than 450 ℃, switching from using wet hot rolling oil sludge to using circulating water of a circulating water system, and continuing to spray water and stuffy slag according to the water spraying system of the invention, wherein the total range of the flow rate of the circulating water is 10m 3 /h～40m 3 /h。
And step five, after slag smoldering is finished, opening a slag smoldering cover and discharging slag, performing subsequent processing and magnetic separation on the steel slag, wherein iron in the hot rolling oil sludge enters the steel slag, and performing magnetic separation and then returning to the sintering, steel making and other working procedures for internal recycling.
In this example, the wet hot-rolled sludge treatment amount was 100m 3 Replacement of 96m of slag-smoldering fresh water supplement 3 The content of the hot rolling turbid circulating water suspended matters after replacement is reduced to 48.5mg/L from 60.8mg/L, the consumption of the medicament is reduced by 22%, and the filter pressing treatment capacity is reduced to 85 t/day from 145 t/day; the dry basis treatment capacity of the hot rolling oil sludge is 24t, the recovery capacity of iron elements is 14.4t, the oil content of the treated and recovered large slag steel is 0%, the oil content of the magnetic separation powder is 0.0058%, and the utilization requirements of the sintering return and steelmaking processes are completely met.
Example 3
Firstly, transporting sediment of an advection pool of a hot-rolled turbid ring system with the water content of 80% to a hot-rolled oil sludge receiving pool of a steel slag hot-stuffy area by adopting a pipeline or a tank car for storage.
And step two, before the hot stuffy pit finishes slag filling operation and is covered, starting a stirring device arranged in the receiving pool to stir the hot rolling oil sludge uniformly.
Step three, after the slag loading operation is finished in the hot stuffy pit, covering and soaking the slag, wherein the temperature in the hot stuffy pit is about 800 ℃, pumping wet hot rolling oil sludge uniformly stirred in the receiving tank into the hot stuffy pit through a pipeline from a hot stuffy cover water inlet interface, and introducing the hot rolling oil sludge at the flow rate of 40m 3 H; when the temperature in the hot closed pit is reduced to 700 ℃, stopping introducing hot rolling oil sludge, and maintaining uniform heating for 60 min; after soaking, the temperature in the hot sealed pit is about 700 ℃, hot rolling oil sludge is continuously introduced, and the flow speed is 50m 3 H; when the temperature in the hot closed pit reaches 600 ℃, stopping introducing hot rolling oil sludge, and maintaining uniform heating for 60 min; after soaking, the temperature in the hot sealed pit is about 600 ℃, hot rolling oil sludge is continuously introduced, and the flow speed is 50m 3 H; and when the temperature in the hot closed pit is reduced to 450 ℃, stopping introducing the hot rolling oil sludge, and maintaining soaking for 60 min.
Step four, when the temperature in the hot closed pit is reduced to be less than 450 ℃, the use of wet hot rolling oil sludge is switched to use of circulating water of a circulating water system, and the water spraying system is continued according to the inventionSpraying water to smolder the slag, wherein the total range of the flow rate of the circulating water is 10m 3 /h～40m 3 /h。
And step five, after slag smoldering is finished, opening a slag smoldering cover and discharging slag, performing subsequent processing and magnetic separation on the steel slag, wherein iron in the hot rolling oil sludge enters the steel slag, and performing magnetic separation and then returning to the sintering, steel making and other working procedures for internal recycling.
In this example, the wet hot-rolled sludge treatment capacity was 140m 3 Replacement of the amount of fresh slag-disintegrating water to be supplemented to 134m 3 The content of the hot rolling turbid ring water suspended matters after replacement is reduced to 42.65mg/L from 60.8mg/L, the consumption of the medicament is reduced by 28%, and the filter pressing treatment capacity is reduced to 61 t/day from 145 t/day; the dry basis treatment capacity of the hot rolling oil sludge is 33.6t, the recovery capacity of iron elements is 20.16t, the oil content of the large slag steel after treatment and recovery is 0%, and the oil content of the magnetic separation powder is 0.0081%, so that the utilization requirements of the processes of sintering and steelmaking are completely met.
Example 4
Step one, transporting the sediment bottom mud of the advection pool of the hot rolling turbid ring system with the water content of 80% to a hot rolling oil sludge receiving pool of a steel slag hot stuffiness area by adopting a pipeline or a tank car for storage.
And step two, before the hot stuffy pit finishes slag filling operation and is covered, starting a stirring device arranged in the receiving pool to stir the hot rolling oil sludge uniformly.
Step three, after the slag loading operation is finished in the hot stuffy pit, covering and soaking the slag, wherein the temperature in the hot stuffy pit is about 800 ℃, pumping wet hot rolling oil sludge uniformly stirred in the receiving tank into the hot stuffy pit through a pipeline from a hot stuffy cover water inlet interface, and introducing the hot rolling oil sludge at the flow rate of 25m 3 H; when the temperature in the hot closed pit is reduced to 700 ℃, stopping introducing hot rolling oil sludge, and maintaining soaking for 50 min; after soaking is finished, the temperature in the hot sealed pit is about 700 ℃, hot rolling oil sludge is continuously introduced, and the flow speed is 45m 3 H; when the temperature in the hot closed pit reaches 600 ℃, stopping introducing hot rolling oil sludge, and maintaining uniform heating for 70 min; after soaking, the temperature in the hot sealed pit is about 600 ℃, hot rolling oil sludge is continuously introduced, and the flow speed is 50m 3 H; and when the temperature in the hot closed pit is reduced to 450 ℃, stopping introducing the hot rolling oil sludge, and maintaining soaking for 70 min.
Step four, when the temperature in the hot stuffy pit is reduced to be less than 450 ℃, switching from using wet hot rolling oil sludge to using circulating water of a circulating water system, and continuing to spray water and stuffy slag according to the water spraying system of the invention, wherein the total range of the flow rate of the circulating water is 10m 3 /h～40m 3 /h。
And step five, after slag smoldering is finished, opening a slag smoldering cover and discharging slag, performing subsequent processing and magnetic separation on the steel slag, wherein iron in the hot rolling oil sludge enters the steel slag, and performing magnetic separation and then returning to the sintering, steel making and other working procedures for internal recycling.
In this example, the wet hot-rolled sludge treatment capacity was 110m 3 And the replacement stuffy slag fresh water supplement amount is 105.6m 3 The content of the hot rolling turbid circulating water suspended matters after replacement is reduced to 46.7mg/L from 60.8mg/L, the consumption of the medicament is reduced by 24%, and the filter pressing treatment capacity is reduced to 79 t/day from 145 t/day; the dry basis treatment capacity of the hot rolling oil sludge is 26.4t, the recovery capacity of iron elements is 15.84t, the oil content of the large slag steel after treatment and recovery is 0%, and the oil content of magnetic separation powder is 0.0064%, so that the utilization requirements of the sintering return and steelmaking processes are completely met.
Example 5
Firstly, transporting sediment of an advection pool of a hot-rolled turbid ring system with the water content of 80% to a hot-rolled oil sludge receiving pool of a steel slag hot-stuffy area by adopting a pipeline or a tank car for storage.
And step two, before the hot stuffy pit finishes slag filling operation and is covered, starting a stirring device arranged in the receiving pool to stir the hot rolling oil sludge uniformly.
Step three, after the slag loading operation is finished in the hot stuffy pit, covering and soaking the slag, wherein the temperature in the hot stuffy pit is about 800 ℃, pumping wet hot rolling oil sludge uniformly stirred in the receiving tank into the hot stuffy pit through a pipeline from a hot stuffy cover water inlet interface, and introducing the hot rolling oil sludge at the flow rate of 40m 3 H; when the temperature in the hot closed pit is reduced to 700 ℃, stopping introducing hot rolling oil sludge, and maintaining uniform heating for 70 min; after soaking, the temperature in the hot sealed pit is about 700 ℃, hot rolling oil sludge is continuously introduced, and the flow speed is 50m 3 H; when the temperature in the hot closed pit reaches 600 ℃, stopping introducing hot rolling oil sludge, and maintaining uniform heating for 50 min; after soaking, the temperature in the hot sealed pit is about 600 ℃, and the soaking is continuedHot rolling oil sludge is fed in, and the flow velocity is 50m 3 H; and when the temperature in the hot closed pit is reduced to 450 ℃, stopping introducing the hot rolling oil sludge, and soaking for 50 min.
Step four, when the temperature in the hot stuffy pit is reduced to be less than 450 ℃, switching from using wet hot rolling oil sludge to using circulating water of a circulating water system, and continuing to spray water and stuffy slag according to the water spraying system of the invention, wherein the total range of the flow rate of the circulating water is 10m 3 /h～40m 3 /h。
And step five, after slag smoldering is finished, opening a slag smoldering cover and discharging slag, performing subsequent processing and magnetic separation on the steel slag, wherein iron in the hot rolling oil sludge enters the steel slag, and performing magnetic separation and then returning to the sintering, steel making and other working procedures for internal recycling.
In this example, the wet hot-rolled sludge treatment capacity was 130m 3 And the replaced stuffy slag fresh water supplement amount is 124.8m 3 The content of the hot-rolling turbid ring water suspended matters after replacement is reduced from 60.8mg/L to 44.22mg/L, the consumption of the medicament is reduced by 27%, and the filter pressing treatment capacity is reduced from 145 t/day to 67 t/day; the dry basis treatment capacity of the hot rolling oil sludge is 31.2t, the recovery capacity of iron elements is 18.72t, the oil content of the large slag steel after treatment and recovery is 0%, and the oil content of magnetic separation powder is 0.0075%, so that the utilization requirements of the processes of sintering return and steelmaking are completely met.
Claims (10)
1. A method for hot-rolling oil sludge treatment by utilizing steel slag hot disintegration is characterized by comprising the following steps: after the hot stuffy pit is covered and soaked in a covering mode after the slag loading operation is completed, pumping wet hot rolling oil sludge into the hot stuffy pit through a pipeline through a hot stuffy cover water inlet interface, performing slag stuffy, cracking oil content of the hot rolling oil sludge in the slag stuffy process to achieve oil content removal, and reducing metal oxides in the oil sludge into steel slag by using carbon-containing and hydrogen-containing substances as reducing agents after cracking.
2. The method for hot-closed treatment of hot-rolled oil sludge by using steel slag according to claim 1, wherein the method comprises the following steps: the method specifically comprises the following operation steps:
transporting wet hot rolling oil sludge to a hot rolling oil sludge receiving pool in a steel slag hot stuffiness area for storage;
step two, before the hot stuffy pit finishes slag loading operation and heats the stuffy cover, uniformly stirring the wet hot rolling oil sludge in the receiving tank;
thirdly, after the slag filling operation is finished in the hot stuffy pit and the hot stuffy pit is covered with a cover for soaking, pumping the uniformly stirred wet hot rolling oil sludge in the receiving tank into the hot stuffy pit through a pipeline from a water inlet interface of the hot stuffy cover to carry out stuffy slag;
step four, when the temperature in the hot stuffy pit is reduced to be less than 450 ℃, switching to use circulating water of a circulating water system from using wet hot rolling oil sludge, and performing water spraying and slag stuffiness according to a slag hot stuffy water spraying system;
and step five, after slag smoldering is finished, opening a hot smoldering cover and discharging slag, then carrying out subsequent processing and magnetic separation on the steel slag, wherein iron in the hot rolling oil sludge enters the steel slag, and recycling the steel slag after the magnetic separation.
3. The method for treating hot rolling oil sludge by utilizing the hot disintegration of the steel slag as claimed in claim 2, wherein the method comprises the following steps: in the first step, the water content of the wet hot rolling oil sludge precipitated in the advection pool is controlled to be more than or equal to 80%.
4. The method for treating hot rolling oil sludge by utilizing the hot disintegration of the steel slag as claimed in claim 2, wherein the method comprises the following steps: and a stirring device is arranged in the hot rolling oil sludge receiving pool.
5. The method for hot-closed treatment of hot-rolled oil sludge by using steel slag as claimed in claim 2, which is characterized in that: and in the third step, when the temperature in the pit is 700-800 ℃ after soaking, hot rolling oil sludge is introduced into the hot closed pit.
6. The method for hot-pressing hot-rolled oil sludge by using steel slag according to any one of claims 1 to 5, wherein the method comprises the following steps: the total amount of hot rolling oil sludge introduced into the hot sealed pit is 100m 3 ～150m 3 。
7. The method for hot-closed treatment of hot-rolled oil sludge by using steel slag according to claim 6, wherein the method comprises the following steps: the flow rate of hot-rolled oil sludge introduced into the hot sealed pit is 20m 3 /h～50m 3 /h。
8. The method for hot-rolling oil sludge treatment by using the steel slag hot-disintegration according to claim 7, which is characterized by comprising the following steps of: in the third step, when the temperature in the hot closed pit is 700-800 ℃, the flow speed of the hot rolling oil sludge is 20m 3 /h～40m 3 H; when the temperature in the hot closed pit reaches 700 ℃, stopping introducing hot rolling oil sludge, and maintaining soaking for 50-70 min; after soaking, when the temperature in the hot closed pit is 600-700 ℃, the flow rate of the hot rolling oil sludge is 40m 3 /h～50m 3 H; when the temperature in the hot closed pit reaches 600 ℃, stopping introducing hot rolling oil sludge, and maintaining soaking for 50-70 min; after soaking is finished, when the temperature in the hot closed pit is 450-600 ℃, the flow velocity of the hot rolling oil sludge is 40m 3 /h～50m 3 H; and when the temperature in the hot closed pit reaches 450 ℃, stopping introducing the hot rolling oil sludge, and soaking for 50-70 min.
9. The method for hot-pressing hot-rolled oil sludge by using steel slag according to any one of claims 1 to 5, wherein the method comprises the following steps: when water is sprayed for slag sealing, the flow speed of circulating water is controlled to be 10m 3 /h～40m 3 /h。
10. The method for hot-pressing hot-rolled oil sludge by using steel slag according to any one of claims 1 to 5, wherein the method comprises the following steps: and step five, controlling the magnetic separation induction intensity to be 100 mT-500 mT during magnetic separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210314756.8A CN114807462B (en) | 2022-03-29 | 2022-03-29 | Method for hot rolling sludge by utilizing steel slag hot-disintegrating treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210314756.8A CN114807462B (en) | 2022-03-29 | 2022-03-29 | Method for hot rolling sludge by utilizing steel slag hot-disintegrating treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114807462A true CN114807462A (en) | 2022-07-29 |
| CN114807462B CN114807462B (en) | 2023-09-22 |
Family
ID=82530616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210314756.8A Active CN114807462B (en) | 2022-03-29 | 2022-03-29 | Method for hot rolling sludge by utilizing steel slag hot-disintegrating treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114807462B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1102167A (en) * | 1993-10-28 | 1995-05-03 | 武汉钢铁(集团)公司 | Method for producing ferric oxide black by using steel rolling greasy filth |
| KR20010057302A (en) * | 1999-12-21 | 2001-07-04 | 신현준 | Manufacturing of reduction iron in hot rolling mill oily sludge by addition of blast furnace slag |
| KR20030039584A (en) * | 2001-11-13 | 2003-05-22 | 주식회사 포스코 | A manufacturing method of direct reduced iron using oily mill sludge |
| CN105347643A (en) * | 2015-12-13 | 2016-02-24 | 宝钢集团新疆八一钢铁有限公司 | Technology for treating steel-rolling oily sludge by means of steel slag waste heat |
| CN105695735A (en) * | 2015-11-26 | 2016-06-22 | 新疆八钢铁股份有限公司 | Self-reduction utilization process for steel rolling oily sludge and blast furnace gas dust |
| CN112342375A (en) * | 2020-10-28 | 2021-02-09 | 湖南华菱湘潭钢铁有限公司 | Method for recovering iron in metallurgical dust and mud |
| CN114147044A (en) * | 2021-11-02 | 2022-03-08 | 江苏沙钢集团有限公司 | Method for cooperatively treating desulfurized ash by steel slag hot-disintegration process |
-
2022
- 2022-03-29 CN CN202210314756.8A patent/CN114807462B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1102167A (en) * | 1993-10-28 | 1995-05-03 | 武汉钢铁(集团)公司 | Method for producing ferric oxide black by using steel rolling greasy filth |
| KR20010057302A (en) * | 1999-12-21 | 2001-07-04 | 신현준 | Manufacturing of reduction iron in hot rolling mill oily sludge by addition of blast furnace slag |
| KR20030039584A (en) * | 2001-11-13 | 2003-05-22 | 주식회사 포스코 | A manufacturing method of direct reduced iron using oily mill sludge |
| CN105695735A (en) * | 2015-11-26 | 2016-06-22 | 新疆八钢铁股份有限公司 | Self-reduction utilization process for steel rolling oily sludge and blast furnace gas dust |
| CN105347643A (en) * | 2015-12-13 | 2016-02-24 | 宝钢集团新疆八一钢铁有限公司 | Technology for treating steel-rolling oily sludge by means of steel slag waste heat |
| CN112342375A (en) * | 2020-10-28 | 2021-02-09 | 湖南华菱湘潭钢铁有限公司 | Method for recovering iron in metallurgical dust and mud |
| CN114147044A (en) * | 2021-11-02 | 2022-03-08 | 江苏沙钢集团有限公司 | Method for cooperatively treating desulfurized ash by steel slag hot-disintegration process |
Non-Patent Citations (1)
| Title |
|---|
| 钱强: "攀钢钢渣生产管理实践", 《四川冶金》, vol. 40, no. 1, pages 68 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114807462B (en) | 2023-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107287368B (en) | Converter steel slag treatment device and method | |
| CN101736112B (en) | Method for fusing and reducing iron from copper residue by blowing inert gas | |
| CN103468939B (en) | A kind of coal-pressing ball and preparation method thereof | |
| CN203728902U (en) | Integrated solid waste gas ash and zinc-containing ferrovanadium slag recovery device | |
| CN110016557B (en) | Method for preparing ferro-silicon-aluminum by smelting aluminum ash serving as raw material in electric arc furnace | |
| CN102251122B (en) | Process for extracting silver from lead-silver slag by acidifying, roasting and leaching | |
| CN105271624B (en) | A kind of method of cooperative disposal heavy metal sewage sludge | |
| CN105861845B (en) | A kind of method of Combined Treatment copper ashes and slag | |
| CN102560124B (en) | Treatment method for harmless reclamation of solid waste of heavy metal | |
| CN115615188B (en) | Oxygen-enriched double-chamber molten pool smelting side-blown furnace and method for extracting iron and quenching molten steel slag | |
| CN114147044B (en) | Method for cooperatively treating desulfurization ash by steel slag hot-disintegrating process | |
| CN104004920A (en) | Method for extracting vanadium from titanium tetrachloride refined tailings | |
| CN114735954A (en) | Hot disintegration treatment method for converter steel slag | |
| CN108103319B (en) | High-temperature strengthening refining method for copper-containing multi-metal material | |
| CN113462840A (en) | Comprehensive utilization method of iron, heat and slag of converter slag and desulfurized slag | |
| CN215628047U (en) | Normal-pressure hot-disintegrating steel slag and waste heat recovery system by reverse water immersion method | |
| CN114807462B (en) | Method for hot rolling sludge by utilizing steel slag hot-disintegrating treatment | |
| CN114317964A (en) | Process and device for reducing zinc-containing material by vacuum low-temperature aluminothermic process | |
| CN103290240A (en) | Method for extracting vanadium by utilizing sensible heat and low energy consumption of vanadium-containing stone coal power generation ash | |
| CN106809899B (en) | Air floatation oil removal system and oil removal method for hot rolling advection pool | |
| CN106810028B (en) | Hot rolling oil sludge air floatation cleaning and deoiling system and deoiling method | |
| CN202757435U (en) | Waste zip-top can depainting and smelting integrative device | |
| KR101169927B1 (en) | Method for withdraing tin by dry refining from tin sludge | |
| CN115637340B (en) | Mixed rare earth concentrate suspension state ore phase conversion-clean leaching system and use method thereof | |
| CN216947078U (en) | Short-flow thermal state steel slag treatment system |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |