CN104404181A - Iron and steel slag wet process processing method - Google Patents
Iron and steel slag wet process processing method Download PDFInfo
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- CN104404181A CN104404181A CN201410698308.8A CN201410698308A CN104404181A CN 104404181 A CN104404181 A CN 104404181A CN 201410698308 A CN201410698308 A CN 201410698308A CN 104404181 A CN104404181 A CN 104404181A
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- slag
- tank
- water
- steel
- steel slag
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- 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
- C21B3/08—Cooling slag
Abstract
The invention provides an iron and steel slag wet process processing method. The iron and steel slag wet process processing method comprises the following steps: continuously sprinkling circulating water on a slag tank at the speed of 15-20t/h, stopping sprinkling water until the cooling water reaches a tank opening, and air-cooling until the water in the tank is thoroughly evaporated; digging flat or digging out slag higher than a trunnion by an excavator or inserting an exhaust hole by a machine with a special rod drill; repeating the water sprinkling procedure, and irregularly measuring the temperature of the middle and lower part of the slag tank; if the temperature is lower than 200 DEG C, intermittently sprinkling water for 1-2 hours, ensuring that water accumulated on the surface of the iron and steel slag in the slag tank does not exceed 2 centimeters, stopping sprinkling water after the temperature of the middle and lower part of the slag tank reaches 100 DEG C more or less, and carrying out tank stirring operation. The water sprinkling procedure is dynamically regulated according to the slag quantity and the cooling water quantity in the tank, slag stirring time is scientifically and visually determined according to the temperature of the slag tank, procedure key points are easily verified by an operator, the technology is easy to execute and practical, thorough and uniform iron and steel slag soaking is ensured, dust fly is prevented from occurring in the slag stirring process, and an environment-friendly effect is realized.
Description
Technical field
The present invention relates to technical field of metallurgy residues, particularly relate to a kind of steel slag wet treatment method.
Background technology
Approximately nearly 100,000,000 tons of the steel slag that metallurgical steel mill discharges every year, steel slag is liquid molten shape when discharging, not only containing a large amount of heats, and with have an appointment about 10% the residual steel of impurity (cinder ladle iron, iron cinder inclusion form), and many useful compositions such as a large amount of oxide complexs and beneficial element.And many slags are not because obtaining effective processing and utilization, need a large amount of stacking, both soil, a large amount of farmland had directly been occupied, its dust and rainwater wash away in a large number simultaneously, make Calcium oxide dissolution in water, cause again neighbouring alkalization of soils, Its Adjacent Waters or river pH value raise, severe contamination surrounding enviroment, constitute the difficult point of iron and steel enterprise's environmental management.Therefore, from the development angle of recycle and recycling economy thereof, the utilization of the existing residual heat and energy of slag, has again the high value of resource recovery to utilize potential, and being precious all over the body, is the secondary resource having value of exploiting and utilizing.Current treatment process has drum process process, hot vexed method, hot application method and wet dip process etc., and the steel slag of domestic employing wet dip process is mainly slag at the bottom of converter tank, desulfurizing slag of hot metal containing pretreatment slag skimming and continuous casting refining slag etc.
Because current steel market is depressed, straight carbon steel product production is high, with low content of technology, stockpiling of unsold product, price is lower, most of steel mill is improving product technology content and changes the present situation of economic slump, and then turns to exploitation and the smelting of special steel product, and along with steelworks variety steel ratio more and more higher, rhythm of production accelerates, steel slag accounts for molten steel ratio and day by day climbs to a higher point, and single tank steel slag quality rises rapidly, and conventional wet process exists following technique bottleneck:
1, original slag ladle loading capacity technique there is standard, wet processing process parameter is formulated for original dress quantity of slag, after current variety steel ratio of smelting improves, single tank slag amount is increased to former quantity of slag 1.5-1.8 doubly, in the unregulated situation of slag ladle, adopt original wet processing parameter, cause immersion not thorough, uneven, it is more to turn over slag process upper strata ponding, a large amount of airborne dust of lower floor, also have part not soak thorough high temperature sludge to be in a liquid state shape, meet water in toppling process to blast, not only there is environmental issue, also there is potential safety hazard.If the quantity of slag in minimizing tank, certainly will increase slag car transportation cost and slag ladle investment, if do not reduce the quantity of slag, certainly will extend watering soak time 1.5-1.8 doubly, rhythm of production does not also allow, and traditional technology defect becomes increasingly conspicuous.
2, after existing slag amount ratio improves, load fuller, once immersion treatment of fetching water, there is the characteristic of moisture expansion and drying shrinkage in steel slag, steel slag exceeds tank mouth after expanding, and after fetching water, sewage can be excessive and steel slag does not have sufficient aquation and infiltration, turn over slag and have a large amount of airborne dust, environmental issue is very serious.
Therefore; day by day improve according to steelworks variety steel ratio of smelting; the present situation that the iron and steel quantity of slag rises gradually; design a kind of safety, efficiently steel slag wet processing process technology; while meeting environmental protection process and existing STEELMAKING PRODUCTION rhythm; do not increase investment in fixed assets, become the technical barrier that those skilled in the art are in the urgent need to address.
Summary of the invention
Technical problem to be solved by this invention is the physical property of aquation chemical principle according to steel slag wet processing and steel slag low thermal conductivity, there is provided a kind of steel slag wet treatment method of safe, efficient, environmental protection, to overcome the above-mentioned defect that prior art exists.
For achieving the above object and other relevant objects, the invention provides a kind of steel slag wet treatment method, comprise the following steps:
1) slag ladle filling with steel slag is transported to wet processing place, in tank, steel slag height is not less than gudgeon;
2) the immersion position of described slag ladle is determined, by described slag ladle handling to soaking position;
3) reference data is recorded: slag ladle number, soak steel slag in position, slag ladle middle and lower part temperature, tank and load whether exceed gudgeon position;
4) adopt 15-20t/h recirculated water uninterruptedly to carry out first time to this slag ladle to sprinkle water cooling, cooling cooling steel scum limit, waterside is evaporated, after progressively rising to tank mouth to water level, and closedown water coolant;
5) the remaining water complete evaporation in described slag ladle is complete, and steel slag surface elevation, has a small amount of hydrate, takes off flat or effects on surface back and forth insert pore to bump surface;
6) adopt 15-20t/h recirculated water uninterruptedly to carry out second time to this slag ladle to sprinkle water cooling, cooling cooling steel scum limit, waterside is evaporated, after progressively rising to tank mouth to water level, and closedown water coolant;
7) the remaining water in described slag ladle is again after complete evaporation, and steel slag surface is swelled again, has again a small amount of hydrate, takes off flat or effects on surface back and forth insert pore to bump surface;
8) irregularly measure slag ladle middle and lower part temperature, treat that slag ladle middle and lower part temperature reaches 100 degrees centigrade, stop watering, carry out turning over tank operation, enter next process.
Further, described step 3) in, in described slag ladle there is the following two kinds situation in steel slag loading capacity: if steel slag vertex reaches gudgeon height in slag ladle, carry out step 4)-step 8); If steel slag vertex reaches tank saliva horizontal line in slag ladle, take the following two kinds mode: 1. adopt digging machine to dig out reaching the horizontal steel slag of tank mouth in the middle part of tank, pour in another sky slag ladle, until steel slag height, after gudgeon height, carry out step 4 in tank)-step 8); 2. 15-20t/h recirculated water is adopted uninterruptedly to sprinkle water to described slag ladle, water level stops watering after rising to tank mouth, the interior remaining water of tank evaporates and in tank, steel slag swells, and adopts digging machine to be dug out by the steel slag that protuberance exceeds gudgeon, down to turning over slag point, carry out step 6)-step 8).
Further, described step 1) in, adopt slag car or flat-bed trailer or track transport vehicle to transport slag ladle.
Further, described step 5) and step 7) in, adopt digging machine take off flat back and forth to bump surface or insert pore with rock drill effects on surface.
Further, described step 8) in, if described slag ladle middle and lower part temperature is 150-200 degree Celsius, adopts 15-20t/h recirculated water intermittent type watering 1-2 hour, guarantee that in slag ladle, steel slag surface area water is no more than 2 centimetres.
By above technical scheme, the present invention has following technique effect compared to prior art: steel slag wet treatment method of the present invention carrys out dynamic adjustments watering operation according to the quantity of slag in tank and cooling water inflow, determine to turn over slag opportunity according to slag ladle temperature, science is directly perceived, and operative employee easily confirms operation key point, and technique performs simple, practical, guarantee that steel slag soaks thoroughly and evenly, the airborne dust stopping to turn over slag process produces, and reaches environment protecting.Simultaneously; steel slag wet treatment method of the present invention adapts to the objective reality of the large quantity of slag in the smelting of existing steel-making high variety steel; the costs such as the setting of watering point and sprinkler system transformation of not changing slag ladle model, do not increase turnover slag ladle quantity, do not increase drop into, and adopt the exploitation of technique and optimize to realize the process of steel slag environmental protection.
Accompanying drawing explanation
Fig. 1 is the flow chart of steps of steel slag wet treatment method of the present invention preferred embodiment.
Element numbers illustrates:
S1 ~ S10 step
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this specification sheets can understand other advantages of the present invention and effect easily.
Refer to Fig. 1.Notice, structure, ratio, size etc. that this specification sheets institute accompanying drawings illustrates, content all only in order to coordinate specification sheets to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionlity or size, do not affecting under effect that the present invention can produce and the object that can reach, still all should drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, quote in this specification sheets as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
Consult shown in Fig. 1, steel slag wet treatment method of the present invention mainly comprises the following steps: adopt 15-20t/h recirculated water uninterruptedly to sprinkle water to slag ladle, stop watering, moisture complete evaporation in air cooling to tank after water coolant to tank mouth.Digging machine is adopted to take off flat or dig out higher than gudgeon slag or the mechanical insert row pore with band special pole pricker.Repeat above watering operation and irregularly measure slag ladle middle and lower part temperature, if lower than 200 degrees Celsius, adopting intermittent type watering 1-2 hour, guarantee that in slag ladle, steel slag surface area water is no more than 2 centimetres, treat that slag ladle middle and lower part temperature reaches 100 degrees centigrade, stop watering, carry out turning over tank operation.
Be described in further detail below in conjunction with Specific construction step:
S1: the slag ladle filling with steel slag is transported to wet processing place by slag car or flat-bed trailer or track transport vehicle, and in tank, steel slag height is not less than gudgeon;
S2: according to the practical situation of on-the-spot steeping tank position, the immersion position of this full slag ladle selected;
S3: will the handling of steel slag slag ladle be filled with to the immersion position of specifying with fork tank car or driving;
S4: staff, at specific record, this records following data: slag ladle number, soak steel slag in position, slag ladle middle and lower part temperature, tank and load whether exceed the raw data such as gudgeon position;
S5: adopt 15-20t/h recirculated water uninterruptedly to sprinkle water to this slag ladle, cooling waterside cooling steel scum, limit is evaporated, and after 3-4 hour, water level starts progressively to rise to tank mouth, now closes water coolant, forbids excessive sewage pollution environment;
S6: approximately 0.5-1 hours, in tank, remaining water complete evaporation is complete, and steel slag surface elevation, has a small amount of hydrate, adopts digging machine take off flat back and forth to bump surface or insert pore with rock drill effects on surface, is beneficial to steel slag heat radiation and water coolant is easily permeated;
S7: adopt 15-20t/h recirculated water uninterruptedly to sprinkle water to this slag ladle, cooling waterside cooling steel scum, limit is evaporated, and after 4-5 hour, water level starts progressively to rise to tank mouth, now closes water coolant, forbids excessive sewage pollution environment;
S8: approximately 1-1.5 hours, in tank, remaining water complete evaporation is complete, and steel slag surface is swelled again, has again a small amount of hydrate, adopt digging machine take off flat back and forth to bump surface or insert pore with rock drill effects on surface, be beneficial to steel slag heat radiation and water coolant is easily permeated;
S9: irregularly measure slag ladle middle and lower part temperature, if 150-200 degrees centigrade, adopts 15-20t/h recirculated water intermittent type watering 1-2 hour, guarantees that in slag ladle, steel slag surface area water is no more than 2 centimetres;
S10: treat that slag ladle middle and lower part temperature reaches 100 degrees centigrade, stops watering, can turn over tank operation, enter next process.
Wherein, in slag ladle there is the following two kinds situation in steel slag loading capacity, and watering process is had any different: if steel slag vertex reaches gudgeon height in slag ladle, carries out above-mentioned S5-S10 watering step; If steel slag vertex reaches tank saliva horizontal line in slag ladle, take the following two kinds mode: 1. adopt digging machine will to reach to fetch water after the horizontal steel slag of tank mouth digs out immersion or immersion of first fetching water in the middle part of tank, again the steel slag higher than gudgeon after expansion is dug out, pour in another sky slag ladle, until steel slag height, after gudgeon height, adopts above-mentioned S5-S10 watering step in tank; 2. 15-20t/h recirculated water is adopted uninterruptedly to sprinkle water to this slag ladle, water level stops watering after rising to tank mouth, the interior remaining water of tank evaporates and in tank, steel slag swells, and adopts digging machine to be dug out by the steel slag that protuberance exceeds gudgeon, down to turning over slag point, carry out above-mentioned S7-S10 watering step.
Be described in further detail below in conjunction with concrete case study on implementation:
Slag ladle one, molten iron slag is a little less than gudgeon, slag weight about 10 tons, slag ladle middle and lower part temperature is 410 degrees Celsius, conventional watering is after nearly 3 hours, Yu Shui is to tank mouth, turn off water coolant after about 1 hour, in tank, remaining water evaporates completely, now swell in the middle part of slag, height is concordant with tank mouth, digging machine is adopted to be taken off by ridge flat and surface knot lid is dug pine, continue watering 4 hours, watering is stopped after Yu Shui to tank mouth, after 1.5 hours, remaining water evaporation thoroughly, digging machine is adopted to take off flat back and forth by middle part protuberance, slag ladle temperature is after 200 degrees centigrade, be interrupted watering 1 hour, slag is turned over when slag ladle middle and lower part temperature is 90 degrees Celsius, turn over slag process to produce without airborne dust completely, illustrate and soak thoroughly with even, reach environmental protection treatment effect.
For fully verifying technological effect of the present invention, large loading capacity is adopted to test: slag ladle two, molten iron slag is higher than gudgeon, highest point is basic concordant with slag ladle mouth, slag weight 18 tons, slag ladle middle and lower part temperature is 420 degrees Celsius, conventional watering is after 3 hours, Yu Shui is concordant with tank mouth, stop watering after 1 hour, remaining water all evaporates, swell in the middle part of slag, higher than slag ladle mouth 400mm, digging machine is adopted to dig out higher than taking off back and forth after gudgeon molten iron slag about 5 tons flat, continue watering after 4 hours, Yu Shui and tank mouth are put down, stop cooling 1.5 hours, after in tank, remaining water evaporates completely, swell to tank open height in the middle part of slag, again take off flat back and forth with digging machine, by hydrate plane pine, slag ladle temperature is lower than after 200 degrees Celsius, be interrupted watering after 2 hours, slag ladle middle and lower part temperature is 98 degrees Celsius and turns over slag, turn over slag process and have no airborne dust, illustrate and soak thoroughly with even, reach environmental protection treatment effect.
In sum, steel slag wet treatment method of the present invention carrys out dynamic adjustments watering operation according to the quantity of slag in tank and cooling water inflow, determine to turn over slag opportunity according to slag ladle temperature, science is directly perceived, and operative employee easily confirms operation key point, and technique performs simple, practical, guarantee that steel slag soaks thoroughly and evenly, the airborne dust stopping to turn over slag process produces, and reaches environment protecting.Simultaneously; steel slag wet treatment method of the present invention adapts to the objective reality of the large quantity of slag in the smelting of existing steel-making high variety steel; the costs such as the setting of watering point and sprinkler system transformation of not changing slag ladle model, do not increase turnover slag ladle quantity, do not increase drop into, and adopt the exploitation of technique and optimize to realize the process of steel slag environmental protection.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (5)
1. a steel slag wet treatment method, is characterized in that, comprises the following steps:
1) slag ladle filling with steel slag is transported to wet processing place, in tank, steel slag height is not less than gudgeon;
2) the immersion position of described slag ladle is determined, by described slag ladle handling to soaking position;
3) reference data is recorded: slag ladle number, soak steel slag in position, slag ladle middle and lower part temperature, tank and load whether exceed gudgeon position;
4) adopt 15-20t/h recirculated water uninterruptedly to carry out first time to this slag ladle to sprinkle water cooling, cooling cooling steel scum limit, waterside is evaporated, after progressively rising to tank mouth to water level, and closedown water coolant;
5) the remaining water complete evaporation in described slag ladle is complete, and steel slag surface elevation, has a small amount of hydrate, takes off flat or effects on surface back and forth insert pore to bump surface;
6) adopt 15-20t/h recirculated water uninterruptedly to carry out second time to this slag ladle to sprinkle water cooling, cooling cooling steel scum limit, waterside is evaporated, after progressively rising to tank mouth to water level, and closedown water coolant;
7) the remaining water in described slag ladle is again after complete evaporation, and steel slag surface is swelled again, has again a small amount of hydrate, takes off flat or effects on surface back and forth insert pore to bump surface;
8) irregularly measure slag ladle middle and lower part temperature, treat that slag ladle middle and lower part temperature reaches 100 degrees centigrade, stop watering, carry out turning over tank operation, enter next process.
2. steel slag wet treatment method according to claim 1, it is characterized in that, described step 3) in, in described slag ladle there is the following two kinds situation in steel slag loading capacity: if steel slag vertex reaches gudgeon height in slag ladle, carry out step 4)-step 8); If steel slag vertex reaches tank saliva horizontal line in slag ladle, take the following two kinds mode: 1. adopt digging machine to dig out reaching the horizontal steel slag of tank mouth in the middle part of tank, pour in another sky slag ladle, until steel slag height, after gudgeon height, carry out step 4 in tank)-step 8); 2. 15-20t/h recirculated water is adopted uninterruptedly to sprinkle water to described slag ladle, water level stops watering after rising to tank mouth, the interior remaining water of tank evaporates and in tank, steel slag swells, and adopts digging machine to be dug out by the steel slag that protuberance exceeds gudgeon, down to turning over slag point, carry out step 6)-step 8).
3. steel slag wet treatment method according to claim 1, is characterized in that, described step 1) in, adopt slag car or flat-bed trailer or track transport vehicle to transport slag ladle.
4. steel slag wet treatment method according to claim 1, is characterized in that, described step 5) and step 7) in, adopt digging machine take off flat back and forth to bump surface or insert pore with rock drill effects on surface.
5. steel slag wet treatment method according to claim 1, it is characterized in that, described step 8) in, if described slag ladle middle and lower part temperature is 150-200 degree Celsius, adopt 15-20t/h recirculated water intermittent type watering 1-2 hour, guarantee that in slag ladle, steel slag surface area water is no more than 2 centimetres.
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| CN201410698308.8A CN104404181B (en) | 2014-11-27 | 2014-11-27 | Steel slag wet treatment method |
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| CN201410698308.8A CN104404181B (en) | 2014-11-27 | 2014-11-27 | Steel slag wet treatment method |
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| CN104404181A true CN104404181A (en) | 2015-03-11 |
| CN104404181B CN104404181B (en) | 2019-03-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330159A (en) * | 2001-06-28 | 2002-01-09 | 上海宝钢冶金建设公司宝钢协力生产分公司 | Process for immersing liquid iron slag |
| JP4267488B2 (en) * | 2004-03-11 | 2009-05-27 | 新日本製鐵株式会社 | Method for cooling steel slag |
| CN102071270A (en) * | 2010-12-20 | 2011-05-25 | 山西太钢不锈钢股份有限公司 | Method for setting total water amount of thermal process of steel slag strip ladle |
| CN102367496A (en) * | 2011-10-10 | 2012-03-07 | 山西太钢不锈钢股份有限公司 | Cooling method for stainless steel slag |
| CN102676712A (en) * | 2012-05-07 | 2012-09-19 | 宝钢发展有限公司 | Process for cooling stainless steel slag by wet method |
-
2014
- 2014-11-27 CN CN201410698308.8A patent/CN104404181B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330159A (en) * | 2001-06-28 | 2002-01-09 | 上海宝钢冶金建设公司宝钢协力生产分公司 | Process for immersing liquid iron slag |
| JP4267488B2 (en) * | 2004-03-11 | 2009-05-27 | 新日本製鐵株式会社 | Method for cooling steel slag |
| CN102071270A (en) * | 2010-12-20 | 2011-05-25 | 山西太钢不锈钢股份有限公司 | Method for setting total water amount of thermal process of steel slag strip ladle |
| CN102367496A (en) * | 2011-10-10 | 2012-03-07 | 山西太钢不锈钢股份有限公司 | Cooling method for stainless steel slag |
| CN102676712A (en) * | 2012-05-07 | 2012-09-19 | 宝钢发展有限公司 | Process for cooling stainless steel slag by wet method |
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