CN1304119C - Process for ball milling and water washing of waste iron and steel slag, slag slurry treatment process, and apparatus therefor - Google Patents

Process for ball milling and water washing of waste iron and steel slag, slag slurry treatment process, and apparatus therefor Download PDF

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Publication number
CN1304119C
CN1304119C CNB2003101106503A CN200310110650A CN1304119C CN 1304119 C CN1304119 C CN 1304119C CN B2003101106503 A CNB2003101106503 A CN B2003101106503A CN 200310110650 A CN200310110650 A CN 200310110650A CN 1304119 C CN1304119 C CN 1304119C
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slag
ball milling
dreg slurry
steel
magnetic
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CNB2003101106503A
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Chinese (zh)
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CN1628910A (en
Inventor
戴少安
唐奇山
李振奇
罗受初
陈濂
黄义斌
范泉锴
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湘潭钢铁集团有限公司
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Abstract

The present invention relates to a mill run slag slurry treatment process for ball milling and water washing of waste iron and steel slag and a device, which mainly solves the technical problems that the existing mill run sewage treatment process for ball milling and water washing is too simple, particularly can not carry out recovery processing for slag slurry, etc. The present invention has the essential technical scheme that the mill run slag slurry treatment process for ball milling and water washing of waste iron and steel slag comprises the existing wet ball milling sieving process, a dry magnetic sieving process and a wet magnetic sieving process. The mill run slag slurry treatment process for ball milling and water washing of waste iron and steel slag is characterized in that magnetic waste iron and steel slag is added with water for wet ball milling after being transferred to a wet ball milling device through a transmission sieving device; after the magnetic waste iron and steel slag is sieved, bean steel containing water is selected from steel bean slag through the dry magnetic sieving process; bean steel products are made through a drying device; mineral powder is selected out from mineral solution obtained by the sieving of the wet ball milling through a wet magnetic sieving process step; iron ore powder products are made through a dewatering device; the slag slurry is made into tailing appendixes and clear water for cyclic utilization through grading, coarse grain slag dewatering, slag slurry concentration and deposition and slag slurry dewatering. The mill run slag slurry treatment process for ball milling and water washing of waste iron and steel slag has the advantages of small land occupation and investment saving, can fully reclaim resources and solves the problem of secondary pollution in the production of waste iron and steel slag development and utilization.

Description

The washing ore dressing of waste steel slag ball milling and dreg slurry treatment process and device

Technical field

The present invention relates to a kind of waste steel slag ball milling washing ore-dressing technique, and dreg slurry treatment process wherein, and the dreg slurry treating apparatus that is used for this technology.

Background technology

Iron and steel production produces the few hundred thousand tonnes of waste steel slag simultaneously.Still contain a large amount of magnetic powders and steel beans in the waste residue.At present, some enterprises handle fraction magnetic waste steel slag powder by very simple ball milling magnetic separation process, and formation is not adapted to waste steel slag and fully utilizes distinctive scale technology.The Ding Shipu that delivers Anshan iron and steel plant water supply plant office as 15 sections of Anshan, Liaoning Province Tiexi Districts is in " extracting the technology of shot, steel sand from steel-refining mud " (application number: 02109641 of application on May 13rd, 2002 patent of invention, open/notification number: 1396004, open/day for announcing: on February 12nd, 2003), it is by obtaining shot, steel sand after the washing of steel-refining mud process, oven dry, cooling, magnetic separation, ball milling, screening, the heat treatment.Its technology is too simple, can not fully reclaim resource, and it only plays partially recycled Iron Ore Powder and beans steel, and its production and the rate of recovery are low; Do not have to solve the dreg slurry account for Main Ingredients and Appearance treatment process this-environmental issue, and cause secondary pollution in the comprehensive utilization process.

Summary of the invention

The purpose of this invention is to provide a kind of washing ore dressing of waste steel slag ball milling and dreg slurry treatment process that can fully reclaim resource.

Another object of the present invention provides a kind of dreg slurry treating apparatus that is used for waste steel slag ball milling washing ore-dressing technique.

The technical solution adopted for the present invention to solve the technical problems is: it comprises the wet ball-milling sieving technology, dry magnetic separation technology and wet magnetic separation technology, it is characterized in that: the magnetic waste steel slag carries out wet ball-milling by carrying screen device general<30mm grade to feed to add water behind the wet ball-milling device, after screening, its steel bean dregs are selected through dry magnetic separation technology and are with moisture beans steel, make the beans product made from steel after the dehydration of drying device, wet ball-milling washing shaft screen is sieved and washed the ore deposit liquid that obtains and is carried out the wet magnetic separation technological process and select Iron Ore Powder, after the dewater unit dehydration, make the Iron Ore Powder product, its tailings liquid makes the mine tailings product through the gradation dewater unit, dreg slurry promotes through pump and enters the concentrating and precipitating separator, lower floor's condensed slag slurry makes the mine tailings product through the slag paste dehydrating device, and it is recycling that the clear water that overflow on clear water of deviating from and concentrating and precipitating separator top imports the circulation clear water reserviors.

Mill washing ore-dressing technique is carried out ball milling by no compartment wet ball mill to the magnetic waste steel slag that feeds, and raw material granularity size and discharging-material size are big or small to be determined ball milling discharging opening size by entering; The ball mill outlet is equipped with shaft screen, slot size is determined according to product requirement, the ore pulp minus mesh enters the wet type drum magnetic separator, and choose and the progression of drum magnetic separator magnetic field intensity are determined by the control of the iron-holder index in ferromagnetic material magnetic in the ore pulp and Iron Ore Powder grade requirement, the mine tailing; Gradation dewater unit technical indicator is determined by dreg slurry total amount and coarse granule mine tailings product water content requirement in the dreg slurry; Dreg slurry concentrating and precipitating separator each partly index by the dreg slurry total amount, contain the rate of settling that solid slag mud amount (concentration) and test obtain and determine; The solid slag mud amount that contains that is produced by the unit interval production capacity of choosing of filter-press dehydration device technique parameter is determined; The water content that is required by moisture content before the dehydration and product user of choosing of beans steel dewater unit technical parameter is determined.

The embodiment that dreg slurry is handled is: dreg slurry is carried in the dreg slurry concentrating and precipitating separator by the slag stock pump, and this device isolation ward top inlet port is provided with distributor, and dreg slurry is entered isolation ward, and dreg slurry enters the main chamber from top to bottom; Settling vessel is established at the middle part in the main chamber; Overflow launder is established in the settling vessel top; Defeated pulp grinder is established in the bottom, is controlled through electronic residue valve by the mud of defeated pulp grinder output, is pressed into the dewater unit dehydration by the slag stock pump.

A kind of dreg slurry treating apparatus that is used for waste steel slag ball milling washing ore-dressing technique, the top of its main chamber 19 is fixedly connected with settling vessel 20, top one side of main chamber 19 is provided with isolation ward 18, the top of settling vessel 20 is provided with overflow launder 21, overflow launder 21 connects Rinsing Area 22, and downcomer 23 connects Rinsing Area 22, and the bottom of main chamber 19 is provided with discharge opeing pipe valve 24 and hand-hole 25, the bottom of main chamber 19 is provided with defeated pulp grinder 10, and defeated pulp grinder 10 is provided with electricity/manual residue valve 9; The top of isolation ward 18 is provided with and connects the distributor 17 that dreg slurry enters pipe 16.Parallel oblique arranged side by side is hung with the sedimentation piece more than 3 or 3 on the support of settling vessel 20, and the link plate bar that sedimentation piece two ends connect firmly is provided with the suspension annex and is suspended on respectively on the support of settling vessel 5.The preferred implementation of settling vessel 20 is to be made of the sedimentation piece that 80 to 500 parallel oblique arranged side by side hang.

Technical flow design of the present invention is reasonable, can fully recycle resource.By practice, when from waste steel slag, passing through wet ball-milling multi-stage magnetic separation recovery Iron Ore Powder and beans steel, take to be used for the dreg slurry treating apparatus of waste steel slag ball milling washing ore-dressing technique, make simple, take up an area of little, small investment, can handle tailings liquid, and the structure flow process of this device is reasonable in design, volume is few, and than other method reduced investment, it is effective to handle dreg slurry.It can fully isolate clear water and slag slurry, fully recycles water resource and slag mud, not only solves the secondary pollution problem in the production process, and the conserve water resource, is beneficial to the comprehensive utilization of tail slag mud.Thereby open up waste steel slag comprehensive utilization new way truly.The dreg slurry that the present invention can be widely used in the waste steel slag ball milling washing ore-dressing technique of steel industry is handled.

Description of drawings

Fig. 1 is an integrated artistic flow chart of the present invention.

Fig. 2 is that tailings liquor treating process route and equipment dispose, contact method figure.

Fig. 3 is the structural representation of dreg slurry concentrating and precipitating separator.

Among the figure: " arrow " expression liquid flow path direction; " chain-dotted line " expression slag is starched turbid liquid stream; " dotted line " expression circulation clear water stream; 1. ball mill device, 2. shaft screen device, 3. one-level concentration equipment, 4. secondary magnetic separation device, 5. gradation dewater unit, 6. water pump, 7. slag stock pump, 8. dreg slurry concentrating and precipitating separator, 9. electricity/manual residue valve is 10. failed pulp grinder, 11. slag paste dehydrating devices, 12. slurries ponds, 13. the circulation clear water reserviors, 14. mine tailings products, 16. dreg slurries enter pipe, 17. distributors, 18. isolation ward, 19. main chambers, 20. settling vessels, 21. overflow launders, 22. Rinsing Area, 23. downcomers, 24. discharge opeing pipe valves, 25. hand-holes.

The specific embodiment:

Embodiment 1, existing wet ball-milling sieving technology has been adopted in its invention, dry magnetic separation technology and wet magnetic separation technology, it is characterized in that: the magnetic waste steel slag carries out wet ball-milling by carrying screen device general<30mm grade to feed to add water behind the wet ball-milling device, after screening, its steel bean dregs are selected through dry magnetic separation technology and are with moisture beans steel, make the beans product made from steel after the dehydration of drying device, wet ball-milling washing shaft screen is sieved and washed the ore deposit liquid that obtains and is carried out the wet magnetic separation technological process and select Iron Ore Powder, after the dewater unit dehydration, make the Iron Ore Powder product, its tailings liquid makes the mine tailings product through the gradation dewater unit, dreg slurry promotes through pump and enters the concentrating and precipitating separator, lower floor's condensed slag slurry makes the mine tailings product through the slag paste dehydrating device, and it is recycling that the clear water that overflow on clear water of deviating from and concentrating and precipitating separator top imports the circulation clear water reserviors.

Steel slag ball-milling washing ore-dressing technique is carried out ball milling by no compartment wet ball mill to the magnetic slag that feeds, and raw material granularity size and discharging-material size are big or small to be determined ball milling discharging opening size by entering; The ball mill outlet is equipped with shaft screen, and slot size is determined according to product requirement.The ore pulp minus mesh enters the wet type drum magnetic separator, the choosing of the magnetic field intensity of magnetic separator, cell body pattern choose half adverse current, adverse current or uni-flow vat, can be directly connected to the Iron Ore Powder rate of recovery and tailings discharge smoothly; Choose and the progression of drum magnetic separator magnetic field intensity are determined by the control of the iron-holder index in ferromagnetic material magnetic in the ore pulp and Iron Ore Powder grade requirement, the mine tailing; Coarse granule classification dewater unit technical indicator is determined by dreg slurry total amount and coarse granule mine tailings product water content requirement in the dreg slurry; Dreg slurry concentrating and precipitating separator each partly index by the dreg slurry total amount, contain the rate of settling that solid slag mud amount (concentration) and test obtain and determine; The solid slag mud amount that contains that is produced by the unit interval production capacity of choosing of filter-press dehydration device technique parameter is determined; The water content that is required by moisture content before the dehydration and product user of choosing of beans steel dewater unit technical parameter is determined.

Can adopt in the present invention below with reference to parameter:

The size of the magnetic field intensity of magnetic separator is: 1100~1500 oersteds; 1800~2000 oersteds.

The cell body pattern is chosen following current, half counter-flow vat form.

The control of the each point water yield size in ball milling-magnetic separation process has certain relation, uses technical process that certain influence is arranged to the dreg slurry cycle of treatment the magnetic separation rate of recovery.Referring to accompanying drawing 1, the present invention in the water yield control parameter of each point is: the water yield that feeds ball mill device is :≤5m 3/ h; The water yield that feeds the shaft screen device is :≤15m 3/ h; The water yield that feeds the one-level concentration equipment is :≤10m 3/ h; The water yield that feeds the secondary magnetic separation device is :≤8m 3/ h.

Embodiment 2, the magnetic waste steel slag feeds and adds water behind the wet ball-milling device 1 and carry out wet ball-milling by carrying sieve waste residue with<30mm grade of screen device, after shaft screen device 2 screening, its steel bean dregs are selected through formula magnetic separation process too and are made the beans product made from steel after being with moisture beans steel, the dehydration of drying device.

Wet ball-milling washing shaft screen device 2 is sieved and washed the ore deposit liquid that obtains and is carried out the wet magnetic separation technological process and select Iron Ore Powder, make the Iron Ore Powder product after the dewater unit dehydration.In order to reach better effects, described wet magnetic separation technological process can be adopted secondary wet magnetic separation device, promptly carries out magnetic separation through one-level concentration equipment 3 and secondary magnetic separation device 4.Obviously, also can only use one-level level concentration equipment 3, or adopt the concentration equipment more than 2 grades to carry out magnetic separation.The required clear water of above-mentioned technology is supplied with through water pump 6 by circulation clear water reserviors 13.The solid that the wet magnetic separation technological process produces can make the Iron Ore Powder product after the dehydration of Iron Ore Powder dewater unit, the liquid that the Iron Ore Powder dewater unit is deviate from enters slurries pond 12.

The tailings liquid that the wet magnetic separation technological process produces makes mine tailings product 14 after entering 5 dehydrations of gradation dewater unit, and the liquid that gradation dewater unit 5 is deviate from enters slurries pond 12.Enter dreg slurries in the slurries pond 12 and promote through slag stock pump 7 and enter dreg slurry concentrating and precipitating separator 8 and carry out precipitate and separate, lower floor's condensed slag slurry of dreg slurry concentrating and precipitating separator 8 enters by defeated pulp grinder 10 that dehydration makes mine tailings product 14 in the slag paste dehydrating device 11.The clear water that overflow on clear water that slag paste dehydrating device 11 is deviate from and concentrating and precipitating separator 8 tops imports in the circulation clear water reserviors 13 recycling.Obviously, the waste water that produces of other of above-mentioned technology in stage also can by filter, post precipitation returns and enters circulation clear water reserviors 13 and carry out recycling.Consult Fig. 1, Fig. 2 or Fig. 3.All the other are with embodiment 1.

Embodiment 3, described a kind of device that is used for washing ore dressing of waste steel slag ball milling and dreg slurry treatment process, the top of its main chamber 19 is fixedly connected with settling vessel 20, top one side of main chamber 19 is provided with isolation ward 18, and the top of settling vessel 20 is provided with overflow launder 21, and overflow launder 21 connects Rinsing Area 22, downcomer 23 connects Rinsing Area 22, the bottom of main chamber 19 is provided with discharge opeing pipe valve 24 and hand-hole 25, and the bottom of main chamber 19 is provided with defeated pulp grinder 10, and defeated pulp grinder 10 is provided with electricity/manual residue valve 9; The top of isolation ward 18 is provided with and connects the distributor 17 that dreg slurry enters pipe 16.Dreg slurry enters pipe 1 by the slag stock pump by dreg slurry and enters isolation ward 3 through dreg slurry distributor 2, and dreg slurry enters main chamber 4 from top to bottom; In main chamber 4, liquid is gentle movement from bottom to top, and easily sediment is starched 4 bottoms, rapid sinking main chamber, and particulate is with liquid settling vessel 5 sedimentations of flowing through; Upper clear supernate is discharged by downcomer 8 after overflow launder 6 enters Rinsing Area 7, so that recycling; The slag slurry that is deposited in 4 bottoms, main chamber is gone into electricity/manual residue valve 11 discharges by defeated pulp grinder 10 collection.It mainly is to be used to discharge object in the main chamber 4 that the bottom of main chamber 4 is provided with discharge opeing pipe valve 9, so that overhaul and maintenance, it mainly is to be convenient to install and maintenance that the bottom of main chamber 4 is provided with hand-hole 25, can pass in and out by hand-hole 25 turnover main chambers 4 for installation and maintainer.Consult Fig. 3.

Embodiment 4, and parallel oblique arranged side by side is hung with the sedimentation piece more than 3 or 3 on the support of settling vessel 20, and the link plate bar that sedimentation piece two ends connect firmly is provided with the suspension annex and is suspended on respectively on the support of settling vessel 5.Particulate in the dreg slurry that is difficult for relatively precipitating floats between the precipitation piece of settling vessel 5, precipitation piece absorption with precipitated device 5, when the particulate that adsorbs on the piece when precipitation reached certain thickness, can be under the natural gravity effect coming off from the precipitation piece of superconducting tilting suspension dropped to the bottom of main chamber 4.The precipitation piece of settling vessel 20 is preferably evenly installed, and the number of precipitation piece can be determined according to required settling area.All the other consult Fig. 3 with embodiment 1.

Embodiment 5, and settling vessel 20 is made of the sedimentation piece that 80 to 500 parallel oblique arranged side by side hang, and all the other are with embodiment 4.Consult Fig. 3.Described precipitation piece can adopt materials such as cloth, rubber, plastics, artificial leather to make.

Claims (6)

1, a kind of waste steel slag ball milling washing ore dressing and dreg slurry treatment process, it comprises the wet ball-milling sieving technology, dry magnetic separation technology and wet magnetic separation technology, it is characterized in that: the magnetic waste steel slag carries out wet ball-milling by carrying screen device general<30mm grade to feed to add water behind the wet ball-milling device, after screening, its steel bean dregs are selected through dry magnetic separation technology and are with moisture beans steel, make the beans product made from steel after the dehydration of drying device, wet ball-milling washing shaft screen is sieved and washed the ore deposit liquid that obtains and is carried out the wet magnetic separation technological process and select Iron Ore Powder, after the dewater unit dehydration, make the Iron Ore Powder product, its tailings liquid makes the mine tailings product through the gradation dewater unit, dreg slurry promotes through pump and enters the concentrating and precipitating separator, lower floor's condensed slag slurry makes the mine tailings product through the slag paste dehydrating device, and it is recycling that the clear water that overflow on clear water of deviating from and concentrating and precipitating separator top imports the circulation clear water reserviors.
2, waste steel slag ball milling washing ore dressing according to claim 1 and dreg slurry treatment process, it is characterized in that: by no compartment wet ball mill the magnetic waste steel slag that feeds is carried out ball milling, raw material granularity size and discharging-material size are big or small to be determined ball milling discharging opening size by entering; The ball mill outlet is equipped with shaft screen, slot size is determined according to product requirement, the ore pulp minus mesh enters the wet type drum magnetic separator, and choose and the progression of drum magnetic separator magnetic field intensity are determined by the control of the iron-holder index in ferromagnetic material magnetic in the ore pulp and Iron Ore Powder grade requirement, the mine tailing; Coarse granule classification dewater unit technical indicator is determined by dreg slurry total amount and coarse granule mine tailings product water content requirement in the dreg slurry; Dreg slurry concentrating and precipitating separator each partly index by the dreg slurry total amount, contain the rate of settling that solid slag mud amount (concentration) and test obtain and determine; The solid slag mud amount that contains that is produced by the unit interval production capacity of choosing of filter-press dehydration device technique parameter is determined; The water content that is required by moisture content before the dehydration and product user of choosing of beans steel dewater unit technical parameter is determined.
3, waste steel slag ball milling washing ore dressing according to claim 1 and dreg slurry treatment process, it is characterized in that: dreg slurry is carried in the dreg slurry concentrating and precipitating separator by the slag stock pump, this device isolation ward top inlet port is provided with distributor, dreg slurry is entered isolation ward, and dreg slurry enters the main chamber from top to bottom; Settling vessel is established at the middle part in the main chamber; Overflow launder is established in the settling vessel top; Defeated pulp grinder is established in the bottom, is controlled through electricity/manual residue valve by the mud of defeated pulp grinder output, is pressed into the dewater unit dehydration by the slag stock pump.
4, a kind of dreg slurry treating apparatus that is used for described waste steel slag ball milling washing ore dressing of claim 1 and dreg slurry treatment process, it is characterized in that: the top of main chamber (19) is fixedly connected with settling vessel (20), top one side of main chamber (19) is provided with isolation ward (18), the top of settling vessel (20) is provided with overflow launder (21), overflow launder (21) connects Rinsing Area (22), downcomer (23) connects Rinsing Area (22), the bottom of main chamber (19) is provided with discharge opeing pipe valve (24) and hand-hole (25), the bottom of main chamber (19) is provided with defeated pulp grinder (10), and defeated pulp grinder (10) is provided with electricity/manual residue valve (9); The top of isolation ward (18) is provided with the distributor (17) that connects dreg slurry and enter pipe (16).
5, the dreg slurry treating apparatus that is used for waste steel slag ball milling washing ore-dressing technique according to claim 4, it is characterized in that: parallel oblique arranged side by side is hung with the sedimentation piece more than 3 or 3 on the support of settling vessel (20), and the link plate bar that sedimentation piece two ends connect firmly is provided with the suspension annex and is suspended on respectively on the support of settling vessel (5).
6, the dreg slurry treating apparatus that is used for waste steel slag ball milling washing ore-dressing technique according to claim 5, it is characterized in that: settling vessel (20) is made of the sedimentation piece that 80 to 500 parallel oblique arranged side by side hang.
CNB2003101106503A 2003-12-15 2003-12-15 Process for ball milling and water washing of waste iron and steel slag, slag slurry treatment process, and apparatus therefor CN1304119C (en)

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CN103060493A (en) * 2012-06-29 2013-04-24 南京梅山冶金发展有限公司 Steel slag water washing ball milling manufacture processing craft
CN101708494B (en) * 2008-10-31 2013-05-01 鞍钢集团矿业公司 Method for recycling iron minerals in magnetic separated gangues

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CN101864501A (en) * 2010-06-22 2010-10-20 新兴河北工程技术有限公司 Method for recycling iron from steel slag
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