CN110293112B - Method for recycling special steel dust and steel rolling oil sludge - Google Patents
Method for recycling special steel dust and steel rolling oil sludge Download PDFInfo
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- CN110293112B CN110293112B CN201910503749.0A CN201910503749A CN110293112B CN 110293112 B CN110293112 B CN 110293112B CN 201910503749 A CN201910503749 A CN 201910503749A CN 110293112 B CN110293112 B CN 110293112B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
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Abstract
The invention discloses a method for recycling special steel dust and steel rolling oil sludge, which comprises the following steps: step 1, distributing materials, namely opening a feed opening of a special steel fly ash bin for storing special steel fly ash and a feed opening of a steel rolling oil sludge bin for storing steel rolling oil sludge, and sequentially distributing the special steel fly ash and the steel rolling oil sludge on a first belt according to a proportion; step 2, mixing materials, namely conveying the special steel dedusting ash and the steel rolling oil sludge on the first belt to a mixer through the first belt, and mixing the special steel dedusting ash and the steel rolling oil sludge through the mixer to obtain a mixture; 3, pressing materials, namely dropping the mixture on a second belt from a discharge port of the mixer, conveying the mixture to a bin of a double-roller press through the second belt, and pressing the mixture into blocks or sheets with certain density through the double-roller press; and 4, storing materials, namely dropping the lump materials or the sheet materials on a third belt from a discharge port of the double-roller press, and conveying the lump materials or the sheet materials to a finished product bin through the third belt for reuse in a sintering stock ground. The method changes the current situation that the raw materials are easy to raise dust, easy to pollute and can not be directly used, and changes the raw materials into excellent raw materials which are convenient to sinter and use.
Description
Technical Field
The invention relates to the field of waste utilization in steel plants, in particular to a method for recycling special steel fly ash and steel rolling oil sludge.
Background
The special steel fly ash is a very fine fly ash, the iron content is generally 40-60%, and in addition, a large amount of calcium elements and magnesium elements are contained. In a steel plant, the special steel dedusting ash is mainly returned to a sintering plant for recycling, but due to the characteristic of extremely fine special steel dedusting ash, the pollution caused in the transportation and use process is large, and the special steel dedusting ash is easy to be drawn away by an exhaust fan after entering a sintering machine, so that the problems of heavy sintering dedusting load, high dedusting power consumption, blockage of dedusting pipeline equipment and the like are caused.
The steel rolling oil sludge consists of water, oil and scrap iron, wherein the content of the water and the oil is generally 5-27%, the balance is the scrap iron, the content of the iron is high, the impurities are few, but the steel rolling oil sludge is not only polluted but also very viscous due to the action of the oil. The steel rolling oil sludge is aired and crushed in a sintering plant and then can be mixed for use.
Therefore, it is necessary to develop a recycling method of the special steel fly ash and the steel rolling oil sludge to solve the problems and disadvantages of recycling the special steel fly ash and the steel rolling oil sludge in the prior art.
Disclosure of Invention
The invention aims to solve the technical problems and provides a method for recycling special steel fly ash and steel rolling oil sludge, which comprises the following steps:
step 1, distributing materials, namely opening a feed opening of a special steel fly ash bin for storing special steel fly ash and a feed opening of a steel rolling oil sludge bin for storing steel rolling oil sludge, and sequentially distributing the special steel fly ash and the steel rolling oil sludge on a first belt according to a proportion;
step 2, mixing materials, namely conveying the special steel dedusting ash and the steel rolling oil sludge on the first belt to a mixer through the first belt, and mixing the special steel dedusting ash and the steel rolling oil sludge through the mixer to obtain a mixture;
3, pressing materials, namely dropping the mixture on a second belt from a discharge port of the mixer, conveying the mixture to a bin of a double-roller press through the second belt, and pressing the mixture into blocks or sheets with certain density through the double-roller press;
and 4, storing materials, namely dropping the lump materials or the sheet materials on a third belt from a discharge port of the double-roller press, and conveying the lump materials or the sheet materials to a finished product bin through the third belt for reuse in a sintering stock ground.
Further, in the step 1, the special steel fly ash is distributed firstly, then the steel rolling oil sludge is distributed, the special steel fly ash is distributed on the lower layer, and the steel rolling oil sludge is distributed on the upper layer.
Further, in the above step 1, the distance between the feed opening of the steel rolling sludge bin and the first belt is set to be as small as possible.
Further, in the above step 1, the material distribution operation is performed in a sealed environment.
Further, in the step 2, a closed mixer is selected for mixing.
Further, in step 3 above, the counter roller press is preferably a simple smooth counter roller.
Further, in the above step 4, the distance between the discharge port of the roll press and the third belt is set so that the lump or large piece of the lump or sheet material can be broken into small pieces or small pieces when it falls down.
Further, in the method for recycling the special steel fly ash and the steel rolling oil sludge, the proportion of the special steel fly ash to the steel rolling oil sludge is controlled to be the liquid content range of the mixture of the special steel fly ash and the steel rolling oil sludge, wherein the liquid refers to water and oil contained in the special steel fly ash and the steel rolling oil sludge.
The method for recycling the special steel dedusting ash and the steel rolling oil sludge utilizes the characteristics that the special steel dedusting ash contains almost no water and the steel rolling oil sludge contains larger water and oil, mixes the special steel dedusting ash and the steel rolling oil sludge to obtain a mixture with moderate liquid (water and oil), and utilizes the characteristic that the steel rolling oil sludge has large viscosity to carry out double-roller pressing on the mixture of the special steel dedusting ash and the steel rolling oil sludge, thereby improving the density of the mixture, and the pressed lump materials or the large pieces in the sheet materials are thrown into small pieces or small pieces when falling through proper distance arrangement, so that the sintering use is convenient. The method provided by the invention changes the current situations that the raw materials are easy to raise dust, easy to pollute and can not be directly used, so that the raw materials become excellent raw materials which are convenient to sinter and use.
Drawings
In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic flow chart of the method for recycling the special steel fly ash and the steel rolling oil sludge.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the method for recycling the special steel fly ash and the steel rolling sludge according to the present invention comprises:
step 1, distributing materials, namely opening a feed opening of a special steel fly ash bin for storing special steel fly ash and a feed opening of a steel rolling oil sludge bin for storing steel rolling oil sludge, and sequentially distributing the special steel fly ash and the steel rolling oil sludge on a first belt according to a proportion;
step 2, mixing materials, namely conveying the special steel dedusting ash and the steel rolling oil sludge on the first belt to a mixer through the first belt, and mixing the special steel dedusting ash and the steel rolling oil sludge through the mixer to obtain a mixture;
3, pressing materials, namely dropping the mixture on a second belt from a discharge port of the mixer, conveying the mixture to a bin of a double-roller press through the second belt, and pressing the mixture into blocks or sheets with certain density through the double-roller press;
and 4, storing materials, namely dropping the lump materials or the sheet materials on a third belt from a discharge port of the double-roller press, and conveying the lump materials or the sheet materials to a finished product bin through the third belt for reuse in a sintering stock ground.
In the step 1, in order to prevent the first belt from being stuck, the special steel fly ash is distributed firstly, and then the steel rolling oil sludge is distributed, so that the special steel fly ash is distributed on the lower layer, and the steel rolling oil sludge is distributed on the upper layer.
In the step 1, in order to prevent the steel rolling oil sludge from causing the dust of the special steel dust when falling onto the first belt, the distance between the feed opening of the steel rolling oil sludge bin and the first belt is set to be as small as possible.
In the step 1, the proportion of the special steel fly ash and the steel rolling oil sludge is controlled to be within the range of 7-15% of the liquid content of the mixture of the special steel fly ash and the steel rolling oil sludge, wherein the liquid refers to water and oil contained in the special steel fly ash and the steel rolling oil sludge.
In the above step 1, the distribution operation is preferably performed in a sealed environment to prevent dusting.
In the step 2, a closed mixer is preferably selected for the mixing operation to prevent dust.
In step 3, the mixture is compacted by the roller press to increase the density of the mixture, and the roller press is preferably selected to be a simple smooth roller.
In the above step 4, the distance between the discharge port of the roll press and the third belt is set so that the lump or large piece of the lump or sheet material can be broken into small pieces or small pieces when falling down, thereby preventing inconvenience in use due to the large lump during sintering.
By utilizing the method for recycling the special steel dedusting ash and the steel rolling oil sludge, the special steel dedusting ash and the steel rolling oil sludge are mixed to obtain a mixture with moderate liquid (water and oil) content, the special steel dedusting ash and the steel rolling oil sludge mixture are subjected to double-roll pressing, so that the density of the mixture is improved, and the pressed block materials or large blocks or small pieces in the sheet materials are thrown into small blocks or small pieces when falling through proper distance arrangement, so that the sintering use is facilitated.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A method for recycling special steel fly ash and steel rolling oil sludge is characterized by comprising the following steps:
step 1, distributing materials, namely opening a feed opening of a special steel fly ash bin for storing special steel fly ash and a feed opening of a steel rolling oil sludge bin for storing steel rolling oil sludge, and sequentially distributing the special steel fly ash and the steel rolling oil sludge on a first belt according to a proportion;
step 2, mixing materials, namely conveying the special steel dedusting ash and the steel rolling oil sludge on the first belt to a mixer through the first belt, and mixing the special steel dedusting ash and the steel rolling oil sludge through the mixer to obtain a mixture;
3, pressing materials, namely dropping the mixture on a second belt from a discharge port of the mixer, conveying the mixture to a bin of a double-roller press through the second belt, and pressing the mixture into blocks or sheets with certain density through the double-roller press;
step 4, storing materials, namely, dropping the lump materials or the sheet materials on a third belt from a discharge port of the double-roller press, and conveying the lump materials or the sheet materials to a finished product bin through the third belt for reuse in a sintering stock ground;
the distance between the discharge port of the roller press and the third belt is set to enable the large blocks or pieces in the lump materials or the sheet materials to be broken into small blocks or small pieces when falling;
in the step 1, distributing special steel fly ash firstly, then distributing steel rolling oil sludge, distributing the special steel fly ash on a lower layer, and distributing the steel rolling oil sludge on an upper layer;
in the step 1, the proportion of the special steel fly ash and the steel rolling oil sludge is controlled to be within the range of 7-15% of the liquid content of the mixture of the special steel fly ash and the steel rolling oil sludge, wherein the liquid refers to water and oil contained in the special steel fly ash and the steel rolling oil sludge.
2. The method for recycling the special steel dust and the steel rolling sludge according to claim 1, wherein in the step 1, the distance between a feed opening of a steel rolling sludge bin and the first belt is set to be as small as possible.
3. The method for recycling the extra steel fly ash and the steel rolling sludge according to claim 2, wherein in the step 1, the material distribution operation is performed in a sealed environment.
4. The method for recycling the extra steel fly ash and the steel rolling oil sludge according to claim 1, wherein in the step 2, a closed mixer is selected for mixing operation.
5. The method for recycling extra-steel fly ash and steel rolling sludge according to claim 1, wherein in the step 3, the pair roller press is selected to be a simple smooth pair roller.
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| CN201910503749.0A CN110293112B (en) | 2019-06-12 | 2019-06-12 | Method for recycling special steel dust and steel rolling oil sludge |
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| CN201910503749.0A CN110293112B (en) | 2019-06-12 | 2019-06-12 | Method for recycling special steel dust and steel rolling oil sludge |
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| CN112280973A (en) * | 2020-11-02 | 2021-01-29 | 宝钢湛江钢铁有限公司 | Method for co-processing emulsified oil sludge by sintering system |
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| US6180023B1 (en) * | 1998-12-12 | 2001-01-30 | Sultan I. Amer | Composition and process for remediation of waste streams |
| CN101624637A (en) * | 2009-08-13 | 2010-01-13 | 首钢总公司 | System and method for centralized classification treatment of steel metallurgic dust mud |
| CN105695735B (en) * | 2015-11-26 | 2019-04-26 | 北京璞域环保科技有限公司 | The autoreduction of a kind of steel rolling oily sludge and blast furnace dust utilizes technique |
| CN106352703A (en) * | 2016-08-29 | 2017-01-25 | 宝钢发展有限公司 | Automatic batching system production line system of rotary hearth furnace and automatic batching system production line system control method |
| CN106755987A (en) * | 2016-12-22 | 2017-05-31 | 山东莱钢永锋钢铁有限公司 | Inexpensive short route sludge reclaims pressure ball new technology |
| CN107937003A (en) * | 2017-11-27 | 2018-04-20 | 山西太钢不锈钢股份有限公司 | A kind of processing method and processing device of greasy filth |
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