CN103131861B - Integrated utilization method of ironmaking dust removal ash - Google Patents
Integrated utilization method of ironmaking dust removal ash Download PDFInfo
- Publication number
- CN103131861B CN103131861B CN201310077707.8A CN201310077707A CN103131861B CN 103131861 B CN103131861 B CN 103131861B CN 201310077707 A CN201310077707 A CN 201310077707A CN 103131861 B CN103131861 B CN 103131861B
- Authority
- CN
- China
- Prior art keywords
- water
- iron
- grade
- slag
- tailings
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides an integrated utilization method of ironmaking dust removal ash, which comprises the following steps: (1) pulping; (2) carbon extraction by floatation; (3) reduction of zinc and iron; (4) water quenching and hot closed slag technique; (5) screening and crushing; (6) magnetic separation of iron; and (7) preparation of water-permeable bricks. The grade of the regenerated carbon powder of the recovered product is 66%, and the recovery rate is 90.75%; the grade of zinc oxide is 51%, and the recovery rate is up to 76.7%; the grade of iron concentrate is 67%, and the recovery rate is 31.4%; and the grade of iron coarse ore is 36%, and the recovery rate is 14.6%. The invention can implement complete reutilization of ironmaking dust removal ash.
Description
Technical field
The invention belongs to the comprehensive utilization technique field of metallurgical solid refuse, is that a kind of entirety of smelting iron dedusting ash is utilized method.
Background technology
Ironmaking dedusting ash is the product that particulate that the raw material that carries out with blast furnace gas in blast furnace ironmaking process, fuel dust and high-temperature zone intense reaction produce obtains through wet dust removal.Ironmaking dedusting ash is a kind of environmental pollutant, is again a kind of potential resources, has good comprehensive utilization value.The common a certain amount of elements such as iron, carbon, zinc that contain in ironmaking dedusting ash, zinc content is up to 20%, and recycle is worth high.
The current recovery method of the metals resources to ironmaking dedusting ash abroad has multiple, as: directly method, sulfidation roasting method, acetic acid lixiviation process, microwave radiation lixiviation process, sulfuric acid leaching-jarosite ammonium method etc. are melted down in the group of making, but its metal recovery rate is all not high enough.The domestic investigator of having adopts Webster oven process to process ironmaking precipitator dust reclaim zinc oxide, and fluctuation of service, affects quality product and output; Research institute of Ma'an Mountain adopts floating-magnetic-weight combined process flow to select carbon, iron fine powder, iron concentrate grade is 60.87%, the rate of recovery is 28.79%, carbon concentrate grade is 61.50%, the rate of recovery is 87.31%, but aforesaid method still has a large amount of tailings to be not used, can not realize the entirety utilization of ironmaking dedusting ash, cause the wasting of resources.
Summary of the invention
The object of the invention is for above-mentioned problems of the prior art, provide a kind of entirety of smelting iron dedusting ash to utilize method, reach the complete recycle of ironmaking dedusting ash.
For achieving the above object, the technical scheme adopting is in the present invention: a kind of entirety of smelting iron dedusting ash is utilized method, comprises the following steps:
1. pulping: ironmaking is added water in dedusting ash, and to stir into concentration be 30% raw material slip, in raw material slip, add kerosene and pine camphor oil to stir, obtain mixed slurry, wherein, in ironmaking dedusting ash per ton, add kerosene 550-600g/t and pine camphor oil 130-180g/t;
2. carbon is carried in flotation: mixed slurry is carried out to carbon flotation, obtain grade and be 68.6% regeneration carbon dust I and tailing slip, then in tailing slip, again add kerosene and pine camphor oil to stir, slip after stirring is scanned, obtain grade and be 62% regeneration carbon dust II and tailings, after regeneration carbon dust I and regeneration carbon dust II are merged, obtain grade and be 66% regeneration carbon dust, wherein, in ironmaking dedusting ash per ton, add kerosene 280-300g/t and pine camphor oil 70-80g/t;
3. zinc, iron reduction: tailings is placed in successively and carries out filter dehydration and oven dry in filter, dryer, in the tailings after drying, add the coke reductive agent of tailings weight 8-12%, mix and be placed in rotary kiln, at 1000-1150 ℃, stop 70-80min and carry out the reduction of zinc, iron, to obtain grade be 51% Zinc oxide powder and discharge kiln slag;
4. shrend slag stewing: kiln slag is carried out to shrend and carry out slag stewing in braised slag pool, and the time is 10-12h, makes kiln slag granularity≤20mm, naturally dries after slag stewing completes, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, and oversize is placed in crusher and carries out fragmentation, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is granularity qualified product;
6. iron is selected in magnetic separation: granularity qualified product are carried out to dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, dry separation concentrate is through sieving, be ground to granularity≤0.1mm, carry out wet magnetic separation operation, magneticstrength is 100mT, obtains grade and be the iron that 67% iron ore concentrate and grade are 36% rough;
7. water-permeable brick preparation: first dry separation tailings is once sieved, oversize adds cement, after stirring, water carries out pressure forming for the first time, as the lower floor of water-permeable brick, the screen undersize of once screening is carried out to regrading, oversize adds cement, after stirring, water carries out pressure forming for the second time, as the middle level of water-permeable brick, the screen undersize of regrading is added to cement, after stirring, water carries out pressure forming for the third time, as the upper strata of water-permeable brick, the slag gray scale of three pressure formings is 3:1, water consumption is 10% of each layer of tailings consumption, amount of pigment is 0.5% of upper strata tailings consumption, water-permeable brick after three pressure formings is through natural curing 28d, obtain finished product water-permeable brick.
In the ironmaking dedusting ash per ton of step described in 1., add kerosene 580g/t and pine camphor oil 150g/t.
In the ironmaking dedusting ash per ton of step described in 2., add kerosene 290g/t and pine camphor oil 75g/t.
The once size of mesh of screening of step described in is 7. 2mm, and the pressure of pressure forming is for the first time 2.0-2.5MPa; The size of mesh of regrading is 0.6mm, and the pressure of pressure forming is for the second time 3.5-3.75MPa; The pressure of pressure forming is for the third time 5-5.35MPa.
A kind of entirety of smelting iron dedusting ash of the present invention is utilized method, and concrete step is:
1. pulping: 10t is smelted iron and adds 23.3t water in dedusting ash to stir into concentration be 30% raw material slip, add 5.8kg kerosene and 1.5kg pine camphor oil to stir in raw material slip, obtain mixed slurry;
2. carbon is carried in flotation: mixed slurry is carried out to carbon flotation, obtain 2.1t grade and be 68.6% regeneration carbon dust I and tailing slip, then in tailing slip, again add 2.9kg kerosene and 0.75kg pine camphor oil to stir, slip after stirring is scanned, obtain 4.1t grade and be 62% regeneration carbon dust II and tailings, 2.1t is regenerated, and after carbon dust I and 4.1t regeneration carbon dust II merge, to obtain grade be 66% regeneration carbon dust 6.2t;
3. zinc, iron reduction: tailings is placed in successively and carries out filter dehydration and oven dry in filter, dryer, to dry after 6.2t tailings in add 615kg coke reductive agent, mix and be placed in rotary kiln, at 1100 ℃, stop 75min and carry out zinc, iron reduction, obtain 1.5t grade and be 51% Zinc oxide powder, and discharge kiln slag;
4. shrend slag stewing: kiln slag is carried out to shrend and carry out slag stewing in braised slag pool, and the time is 11h, makes kiln slag granularity≤20mm, naturally dries after slag stewing completes, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, and oversize is placed in crusher and carries out fragmentation, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is granularity qualified product;
6. iron is selected in magnetic separation: granularity qualified product are carried out to dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, dry separation concentrate is through sieving, be ground to granularity≤0.1mm, carry out wet magnetic separation operation, magneticstrength is 100mT, obtains 937.3kg grade and be 67% iron ore concentrate, and the iron that 811.1kg grade is 36% is rough;
7. water-permeable brick preparation: first dry separation tailings is once sieved, oversize 938.4kg adds 312.8kg cement, after stirring, 93.8kg water carries out pressure forming for the first time, as the lower floor of water-permeable brick, the screen undersize of once screening is carried out to regrading, oversize 1.1t adds 375.4kg cement, after stirring, 112.6kg water carries out pressure forming for the second time, as the middle level of water-permeable brick, the screen undersize 750.7kg of regrading is added to 250.2kg cement, after stirring, 75.1kg water carries out pressure forming for the third time, as the upper strata of water-permeable brick, wherein, once the size of mesh of screening is 2mm, the pressure of pressure forming is for the first time 2.3MPa, the size of mesh of regrading is 0.6mm, and the pressure of pressure forming is for the second time 3.7MPa, the pressure of pressure forming is for the third time 5.2MPa, amount of pigment 37.5kg, and the water-permeable brick of three pressure formings, through natural curing 28d, obtains 207 of finished product water-permeable bricks.
A kind of entirety of smelting iron dedusting ash of the present invention is utilized method, adopt the technical process of " carbon-zinc is carried in flotation, iron reduction-shrend slag stewing-magnetic separation selects iron-tailings hierarchical classification to prepare water-permeable brick " according to feedstock property, realize the recycling of efficient recovery and the solid waste of resource, finally reach the entirety utilization of ironmaking dedusting ash, without secondary pollution and the wasting of resources of waste residue.Carbon is carried in flotation and magnetic separation selects iron step all to carry out grading recovery, is beneficial to the raising rate of recovery.Shrend slag stewing technical finesse kiln slag, reduces kiln slag granularity, reduces crushing process, has saved production cost.To dry type magnetic separation tailings carry out hierarchical classification, water-permeable brick is prepared in three pressure formings, has improved ultimate compression strength and the permeability rate of finished product water-permeable brick, ultimate compression strength reaches 37.4 MPa, more than permeability rate reaches 0.02cm/s.
A kind of entirety of smelting iron dedusting ash of the present invention is utilized method, flotation is carried in carbon process, the amount ranges of pore forming material kerosene and collecting agent pine camphor oil can effectively improve the flotation speed of regeneration carbon dust, step 1. with step 2. in the difference of consumption of kerosene and pine camphor oil, can guarantee that the regeneration carbon dust time-division of extracting different grades does not reach the highest selectivity.The consumption of coke reductive agent can guarantee that iron and zinc all can reach the higher rate of recovery.The present invention reclaims product: regenerative carbon grade powder is 66%, and the rate of recovery is 90.75%; Zinc oxide grade is 51%, and the rate of recovery reaches 76.7%; Iron concentrate grade is 67%, and the rate of recovery is 31.4%, and the rough grade of iron is 36%, and the rate of recovery is 14.6%.
Embodiment
A kind of entirety of smelting iron dedusting ash of the present invention is utilized method, comprises the following steps:
1. pulping: ironmaking is added water in dedusting ash, and to stir into concentration be 30% raw material slip, in raw material slip, add kerosene and pine camphor oil to stir, obtain mixed slurry, wherein, in ironmaking dedusting ash per ton, add kerosene 550-600g/t and pine camphor oil 130-180g/t;
2. carbon is carried in flotation: mixed slurry is carried out to carbon flotation, obtain grade and be 68.6% regeneration carbon dust I and tailing slip, then in tailing slip, again add kerosene and pine camphor oil to stir, slip after stirring is scanned, obtain grade and be 62% regeneration carbon dust II and tailings, after regeneration carbon dust I and regeneration carbon dust II are merged, obtain grade and be 66% regeneration carbon dust, wherein, in ironmaking dedusting ash per ton, add kerosene 280-300g/t and pine camphor oil 70-80g/t;
3. zinc, iron reduction: tailings is placed in successively and carries out filter dehydration and oven dry in filter, dryer, in the tailings after drying, add the coke reductive agent of tailings weight 8-12%, mix and be placed in rotary kiln, at 1000-1150 ℃, stop 70-80min and carry out the reduction of zinc, iron, to obtain grade be 51% Zinc oxide powder and discharge kiln slag;
4. shrend slag stewing: kiln slag is carried out to shrend and carry out slag stewing in braised slag pool, and the time is 10-12h, makes kiln slag granularity≤20mm, naturally dries after slag stewing completes, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, and oversize is placed in crusher and carries out fragmentation, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is granularity qualified product;
6. iron is selected in magnetic separation: granularity qualified product are carried out to dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, dry separation concentrate is through sieving, be ground to granularity≤0.1mm, carry out wet magnetic separation operation, magneticstrength is 100mT, obtains grade and be the iron that 67% iron ore concentrate and grade are 36% rough;
7. water-permeable brick preparation: first dry separation tailings is once sieved, oversize adds cement, after stirring, water carries out pressure forming for the first time, as the lower floor of water-permeable brick, the screen undersize of once screening is carried out to regrading, oversize adds cement, after stirring, water carries out pressure forming for the second time, as the middle level of water-permeable brick, the screen undersize of regrading is added to cement, after stirring, water carries out pressure forming for the third time, as the upper strata of water-permeable brick, the slag gray scale of three pressure formings is 3:1, water consumption is 10% of each layer of tailings consumption, amount of pigment is 0.5% of upper strata tailings consumption, water-permeable brick after three pressure formings is through natural curing 28d, obtain finished product water-permeable brick.
Preferred embodiments of the present invention are:
In the ironmaking dedusting ash per ton of step described in 1., add kerosene 580g/t and pine camphor oil 150g/t.Take kerosene as collecting agent, pine camphor oil reaches maximum value in flotation stage can make the to regenerate rate of recovery of carbon dust I as the preferred consumption of pore forming material.
In the ironmaking dedusting ash per ton of step described in 2., add kerosene 290g/t and pine camphor oil 75g/t.This preferred consumption reaches maximum value in the stage of scanning can make the to regenerate rate of recovery of carbon dust II.
The once size of mesh of screening of step described in is 7. 2mm, and the pressure of pressure forming is for the first time 2.0-2.5MPa; The size of mesh of regrading is 0.6mm, and the pressure of pressure forming is for the second time 3.5-3.75MPa; The pressure of pressure forming is for the third time 5-5.35MPa.Preferred size of mesh can reach preferably permeability rate.Preferred pressure forming pressure makes the water-permeable brick of preparation have preferably ultimate compression strength.
A kind of entirety of smelting iron dedusting ash of the present invention utilizes method can have following specific embodiment:
Embodiment 1: a kind of entirety of smelting iron dedusting ash utilizes the concrete steps of method to be:
1. pulping: 1t is smelted iron and adds 2.33t water in dedusting ash (carbon content 25%, iron level 20%, zinc content 4%) to stir into concentration be 30% raw material slip, add 550 g kerosene and 130g pine camphor oil to stir in raw material slip, obtain mixed slurry;
2. carbon is carried in flotation: mixed slurry is carried out to carbon flotation, obtain 112.64kg grade and be 68.6% regeneration carbon dust I and tailing slip, then in tailing slip, again add 280g kerosene and 70g pine camphor oil to stir, slip after stirring is scanned, obtain 225.28kg grade and be 62% regeneration carbon dust II and tailings, 112.64kg is regenerated, and after carbon dust I and 225.28kg regeneration carbon dust II merges, to obtain grade be 66% regeneration carbon dust 337.92kg, and the rate of recovery is 89.21%;
3. zinc, iron reduction: tailings is placed in successively and carries out filter dehydration and oven dry in filter, dryer, to dry after 896kg tailings in add 71.68kg coke reductive agent, mix and be placed in rotary kiln, at 1000 ℃, stop 70min and carry out zinc, iron reduction, obtain 72.8kg grade and be 51% Zinc oxide powder, the rate of recovery is 74.6%, and discharges kiln slag;
4. shrend slag stewing: kiln slag is carried out to shrend and carry out slag stewing in braised slag pool, and the time is 10h, makes kiln slag granularity≤20mm, naturally dries after slag stewing completes, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, and oversize is placed in crusher and carries out fragmentation, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is granularity qualified product;
6. iron is selected in magnetic separation: granularity qualified product are carried out to dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, dry separation concentrate, through sieving, being ground to granularity≤0.1mm, carries out wet magnetic separation operation, and magneticstrength is 100mT, obtain 90.8kg grade and be 67% iron ore concentrate, the rate of recovery is that 30.4%, 78.3kg grade is that 36% iron is rough, and the rate of recovery is 14.1%;
7. water-permeable brick preparation: first dry separation tailings is once sieved, oversize 212.6kg adds 70.9kg cement, after stirring, 21.3kg water carries out pressure forming for the first time, as the lower floor of water-permeable brick, the screen undersize of once screening is carried out to regrading, oversize 255.1kg adds 85kg cement, after stirring, 25.5kg water carries out pressure forming for the second time, as the middle level of water-permeable brick, the screen undersize 170.1kg of regrading is added to 56.7kg cement, after stirring, 17kg water carries out pressure forming for the third time, as the upper strata of water-permeable brick, wherein, once the size of mesh of screening is 2mm, the pressure of pressure forming is for the first time 2.0MPa, the size of mesh of regrading is 0.6mm, and the pressure of pressure forming is for the second time 3.5MPa, the pressure of pressure forming is for the third time 5MPa, amount of pigment 8.5kg, and the water-permeable brick of three pressure formings, through natural curing 28d, obtains 47 of finished product water-permeable bricks.
Embodiment 2: a kind of entirety of smelting iron dedusting ash utilizes the concrete steps of method to be:
1. pulping: 10t is smelted iron and adds 23.3t water in dedusting ash (carbon content 45%, iron level 20%, zinc content 8%) to stir into concentration be 30% raw material slip, add 5.8kg kerosene and 1.5kg pine camphor oil to stir in raw material slip, obtain mixed slurry;
2. carbon is carried in flotation: mixed slurry is carried out to carbon flotation, obtain 2.1t grade and be 68.6% regeneration carbon dust I and tailing slip, then in tailing slip, again add 2.9kg kerosene and 0.75kg pine camphor oil to stir, slip after stirring is scanned, obtain 4.1t grade and be 62% regeneration carbon dust II and tailings, 2.1t is regenerated, and after carbon dust I and 4.1t regeneration carbon dust II merges, to obtain grade be 66% regeneration carbon dust 6.2t, and the rate of recovery is 90.75%;
3. zinc, iron reduction: tailings is placed in successively and carries out filter dehydration and oven dry in filter, dryer, to dry after 6.2t tailings in add 615kg coke reductive agent, mix and be placed in rotary kiln, at 1100 ℃, stop 75min and carry out zinc, iron reduction, obtain 1.5t grade and be 51% Zinc oxide powder, the rate of recovery is 76.7%, and discharges kiln slag;
4. shrend slag stewing: kiln slag is carried out to shrend and carry out slag stewing in braised slag pool, and the time is 11h, makes kiln slag granularity≤20mm, naturally dries after slag stewing completes, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, and oversize is placed in crusher and carries out fragmentation, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is granularity qualified product;
6. iron is selected in magnetic separation: granularity qualified product are carried out to dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, dry separation concentrate, through sieving, being ground to granularity≤0.1mm, carries out wet magnetic separation operation, and magneticstrength is 100mT, obtain 937.3kg grade and be 67% iron ore concentrate, the rate of recovery is that 31.4%, 811.1kg grade is that 36% iron is rough, and the rate of recovery is 14.6%;
7. water-permeable brick preparation: first dry separation tailings is once sieved, oversize 938.4kg adds 312.8kg cement, after stirring, 93.8kg water carries out pressure forming for the first time, as the lower floor of water-permeable brick, the screen undersize of once screening is carried out to regrading, oversize 1.1t adds 375.4kg cement, after stirring, 112.6kg water carries out pressure forming for the second time, as the middle level of water-permeable brick, the screen undersize 750.7kg of regrading is added to 250.2kg cement, after stirring, 75.1kg water carries out pressure forming for the third time, as the upper strata of water-permeable brick, wherein, once the size of mesh of screening is 2mm, the pressure of pressure forming is for the first time 2.3MPa, the size of mesh of regrading is 0.6mm, and the pressure of pressure forming is for the second time 3.7MPa, the pressure of pressure forming is for the third time 5.2MPa, amount of pigment 37.5kg, and the water-permeable brick of three pressure formings, through natural curing 28d, obtains 207 of finished product water-permeable bricks.
Embodiment 3: a kind of entirety of smelting iron dedusting ash utilizes the concrete steps of method to be:
1. pulping: 100t is smelted iron and adds 233.3t water in dedusting ash (carbon content 30%, iron level 30%, zinc content 5%) to stir into concentration be 30% raw material slip, add 60kg kerosene and 18kg pine camphor oil to stir in raw material slip, obtain mixed slurry;
2. carbon is carried in flotation: mixed slurry is carried out to carbon flotation, obtain 13.3t grade and be 68.6% regeneration carbon dust I and tailing slip, then in tailing slip, again add 30kg kerosene and 8kg pine camphor oil to stir, slip after stirring is scanned, obtain 26.6t grade and be 62% regeneration carbon dust II and tailings, 13.3t is regenerated, and after carbon dust I and 26.6t regeneration carbon dust II merges, to obtain grade be 66% regeneration carbon dust 39.9t, and the rate of recovery is 87.94%;
3. zinc, iron reduction: tailings is placed in successively and carries out filter dehydration and oven dry in filter, dryer, to dry after 83.5t tailings in add 10.02t coke reductive agent, mix and be placed in rotary kiln, at 1150 ℃, stop 80min and carry out zinc, iron reduction, obtain 8.9t grade and be 51% Zinc oxide powder, the rate of recovery is 73.1%, and discharges kiln slag;
4. shrend slag stewing: kiln slag is carried out to shrend and carry out slag stewing in braised slag pool, and the time is 12h, makes kiln slag granularity≤20mm, naturally dries after slag stewing completes, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, and oversize is placed in crusher and carries out fragmentation, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is granularity qualified product;
6. iron is selected in magnetic separation: granularity qualified product are carried out to dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, dry separation concentrate, through sieving, being ground to granularity≤0.1mm, carries out wet magnetic separation operation, and magneticstrength is 100mT, obtain 13.1t grade and be 67% iron ore concentrate, the rate of recovery is that 29.3%, 12.1t grade is that 36% iron is rough, and the rate of recovery is 14.5%;
7. water-permeable brick preparation: first dry separation tailings is once sieved, oversize 16t adds 5.3t cement, after stirring, 1.6t water carries out pressure forming for the first time, as the lower floor of water-permeable brick, the screen undersize of once screening is carried out to regrading, oversize 19.1t adds 6.4t cement, after stirring, 1.9t water carries out pressure forming for the second time, as the middle level of water-permeable brick, the screen undersize 120.8t of regrading is added to 4.3t cement, after stirring, 1.3t water carries out pressure forming for the third time, as the upper strata of water-permeable brick, wherein, once the size of mesh of screening is 2mm, the pressure of pressure forming is for the first time 2.5MPa, the size of mesh of regrading is 0.6mm, and the pressure of pressure forming is for the second time 3.75MPa, the pressure of pressure forming is for the third time 5.35MPa, amount of pigment 6.04t, and the water-permeable brick of three pressure formings, through natural curing 28d, obtains 3519 of finished product water-permeable bricks.
Claims (5)
1. the entirety of dedusting ash of smelting iron is utilized a method, it is characterized in that: comprise the following steps:
1. pulping: ironmaking is added water in dedusting ash, and to stir into concentration be 30% raw material slip, in raw material slip, add kerosene and pine camphor oil to stir, obtain mixed slurry, wherein, in ironmaking dedusting ash per ton, add kerosene 550-600g/t and pine camphor oil 130-180g/t;
2. carbon is carried in flotation: mixed slurry is carried out to carbon flotation, obtain grade and be 68.6% regeneration carbon dust I and tailing slip, then in tailing slip, again add kerosene and pine camphor oil to stir, slip after stirring is scanned, obtain grade and be 62% regeneration carbon dust II and tailings, after regeneration carbon dust I and regeneration carbon dust II are merged, obtain grade and be 66% regeneration carbon dust, wherein, in ironmaking dedusting ash per ton, add kerosene 280-300g/t and pine camphor oil 70-80g/t;
3. zinc, iron reduction: tailings is placed in successively and carries out filter dehydration and oven dry in filter, dryer, in the tailings after drying, add the coke reductive agent of tailings weight 8-12%, mix and be placed in rotary kiln, at 1000-1150 ℃, stop 70-80min and carry out the reduction of zinc, iron, to obtain grade be 51% Zinc oxide powder and discharge kiln slag;
4. shrend slag stewing: kiln slag is carried out to shrend and carry out slag stewing in braised slag pool, and the time is 10-12h, makes kiln slag granularity≤20mm, naturally dries after slag stewing completes, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, and oversize is placed in crusher and carries out fragmentation, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is granularity qualified product;
6. iron is selected in magnetic separation: granularity qualified product are carried out to dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, dry separation concentrate is through sieving, be ground to granularity≤0.1mm, carry out wet magnetic separation operation, magneticstrength is 100mT, obtains grade and be the iron that 67% iron ore concentrate and grade are 36% rough;
7. water-permeable brick preparation: first dry separation tailings is once sieved, oversize adds cement, after stirring, water carries out pressure forming for the first time, as the lower floor of water-permeable brick, the screen undersize of once screening is carried out to regrading, oversize adds cement, after stirring, water carries out pressure forming for the second time, as the middle level of water-permeable brick, the screen undersize of regrading is added to cement, after stirring, water carries out pressure forming for the third time, as the upper strata of water-permeable brick, the tailings of three pressure formings is 3:1 with cement ratio, water consumption is 10% of each layer of tailings consumption, amount of pigment be pressure forming for the third time water-permeable brick upper strata consumption 0.5%, water-permeable brick after three pressure formings is through natural curing 28d, obtain finished product water-permeable brick.
2. a kind of entirety of smelting iron dedusting ash according to claim 1 is utilized method, it is characterized in that: in the ironmaking dedusting ash per ton of step described in 1., add kerosene 580g/t and pine camphor oil 150g/t.
3. a kind of entirety of smelting iron dedusting ash according to claim 1 is utilized method, it is characterized in that: in the ironmaking dedusting ash per ton of step described in 2., add kerosene 290g/t and pine camphor oil 75g/t.
4. a kind of entirety of smelting iron dedusting ash according to claim 1 is utilized method, it is characterized in that: the once size of mesh of screening of step described in is 7. 2mm, and the pressure of pressure forming is for the first time 2.0-2.5MPa; The size of mesh of regrading is 0.6mm, and the pressure of pressure forming is for the second time 3.5-3.75MPa; The pressure of pressure forming is for the third time 5-5.35MPa.
5. a kind of entirety of smelting iron dedusting ash according to claim 1 is utilized method, it is characterized in that: concrete step is:
1. pulping: 10t is smelted iron and adds 23.3t water in dedusting ash to stir into concentration be 30% raw material slip, add 5.8kg kerosene and 1.5kg pine camphor oil to stir in raw material slip, obtain mixed slurry;
2. carbon is carried in flotation: mixed slurry is carried out to carbon flotation, obtain 2.1t grade and be 68.6% regeneration carbon dust I and tailing slip, then in tailing slip, again add 2.9kg kerosene and 0.75kg pine camphor oil to stir, slip after stirring is scanned, obtain 4.1t grade and be 62% regeneration carbon dust II and tailings, 2.1t is regenerated, and after carbon dust I and 4.1t regeneration carbon dust II merge, to obtain grade be 66% regeneration carbon dust 6.2t;
3. zinc, iron reduction: tailings is placed in successively and carries out filter dehydration and oven dry in filter, dryer, to dry after 6.2t tailings in add 615kg coke reductive agent, mix and be placed in rotary kiln, at 1100 ℃, stop 75min and carry out zinc, iron reduction, obtain 1.5t grade and be 51% Zinc oxide powder, and discharge kiln slag;
4. shrend slag stewing: kiln slag is carried out to shrend and carry out slag stewing in braised slag pool, and the time is 11h, makes kiln slag granularity≤20mm, naturally dries after slag stewing completes, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, and oversize is placed in crusher and carries out fragmentation, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is granularity qualified product;
6. iron is selected in magnetic separation: granularity qualified product are carried out to dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, dry separation concentrate is through sieving, be ground to granularity≤0.1mm, carry out wet magnetic separation operation, magneticstrength is 100mT, obtains 937.3kg grade and be the iron that 67% iron ore concentrate and 811.1kg grade are 36% rough;
7. water-permeable brick preparation: first dry separation tailings is once sieved, oversize 938.4kg adds 312.8kg cement, after stirring, 93.8kg water carries out pressure forming for the first time, as the lower floor of water-permeable brick, the screen undersize of once screening is carried out to regrading, oversize 1.1t adds 375.4kg cement, after stirring, 112.6kg water carries out pressure forming for the second time, as the middle level of water-permeable brick, the screen undersize 750.7kg of regrading is added to 250.2kg cement, after stirring, 75.1kg water carries out pressure forming for the third time, as the upper strata of water-permeable brick, wherein, once the size of mesh of screening is 2mm, the pressure of pressure forming is for the first time 2.3MPa, the size of mesh of regrading is 0.6mm, and the pressure of pressure forming is for the second time 3.7MPa, the pressure of pressure forming is for the third time 5.2MPa, amount of pigment 37.5kg, and the water-permeable brick of three pressure formings, through natural curing 28d, obtains 207 of finished product water-permeable bricks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310077707.8A CN103131861B (en) | 2013-03-12 | 2013-03-12 | Integrated utilization method of ironmaking dust removal ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310077707.8A CN103131861B (en) | 2013-03-12 | 2013-03-12 | Integrated utilization method of ironmaking dust removal ash |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103131861A CN103131861A (en) | 2013-06-05 |
| CN103131861B true CN103131861B (en) | 2014-05-28 |
Family
ID=48492309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310077707.8A Expired - Fee Related CN103131861B (en) | 2013-03-12 | 2013-03-12 | Integrated utilization method of ironmaking dust removal ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103131861B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572040B (en) * | 2013-11-22 | 2015-02-04 | 中国矿业大学(北京) | Method for reducing carbon, sulfur and iron of fly ash and recovering iron ore concentrate |
| CN104028384B (en) * | 2014-06-04 | 2016-08-17 | 孙伟 | A kind of process blast furnace dust the method reclaiming ferrum zinc |
| CN104028366B (en) * | 2014-06-04 | 2016-06-29 | 孙伟 | A kind of recoverying and utilizing method of dedusting ash or gas ash |
| CN104874583A (en) * | 2015-05-07 | 2015-09-02 | 湖南华菱湘潭钢铁有限公司 | Comprehensive treatment method of dry reclaimed dust of blast furnace |
| CN106076645A (en) * | 2016-06-12 | 2016-11-09 | 葫芦岛锌业股份有限公司 | A kind of whirlpool stove Water Quenching Slag reclaims gold, silver and the method for copper |
| CN106191453B (en) * | 2016-08-31 | 2018-04-13 | 四川省新源泰环保科技有限责任公司 | It is a kind of to utilize rotary hearth furnace dirt ash recycling zinc enriched substance and the method for potassium chloride |
| CN106702171B (en) * | 2017-02-07 | 2018-05-15 | 山东大正节能环保科技有限公司 | A kind of technique of blast furnace dedusting ash extracting zinc |
| CN109530075B (en) * | 2017-09-22 | 2021-04-13 | 中南大学 | Method for separating and recovering carbon from raw material containing carbon with low cost and high efficiency |
| CN108034829A (en) * | 2017-12-05 | 2018-05-15 | 杜海东 | A kind of method of the bag-type dust ash production containing scum and high zinc material |
| CN109265102B (en) * | 2018-09-30 | 2021-06-22 | 合肥仁创铸造材料有限公司 | Harmless treatment method for casting dedusting ash |
| CN110586318B (en) * | 2019-10-23 | 2022-03-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for comprehensive utilization of blast furnace ash |
| CN114273387A (en) * | 2021-12-24 | 2022-04-05 | 湖南博一环保科技有限公司 | Method for recovering carbon and reducing iron from water-quenched slag |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1282503C (en) * | 2005-01-28 | 2006-11-01 | 毛贵忠 | Sorting re-utilizing process for furnace dust-proof ash |
| CN1313626C (en) * | 2005-04-05 | 2007-05-02 | 柳州市清宇环保产业开发有限责任公司 | Method for treating blast furnace dust |
| CN101654717B (en) * | 2009-09-15 | 2011-08-03 | 莱芜市泰山焦化有限公司 | Comprehensive treatment method of blast furnace dedusting ash |
| CN102851414A (en) * | 2012-09-24 | 2013-01-02 | 柳州市环源利环境资源技术开发有限公司 | Treatment technique of blast furnace fly ash |
-
2013
- 2013-03-12 CN CN201310077707.8A patent/CN103131861B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103131861A (en) | 2013-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103131861B (en) | Integrated utilization method of ironmaking dust removal ash | |
| CN103397128B (en) | Method used for extracting iron from red mud by drastic reduction and method used for preparing gel material from secondary tailings | |
| CN106755981B (en) | Method for producing metallized pellets by using iron ore tailings | |
| CN102363218B (en) | Method for producing copper-powder-containing iron by reducing copper-containing furnace cinders directly | |
| CN104087753B (en) | A kind of lateritic nickel ore self catalyzed reduction produces the method for nickelic grade ferronickel powder | |
| CN101624654A (en) | Method for recycling iron and aluminum by particle size grading pretreatment of Bayer process red mud | |
| CN103276294B (en) | Method for rapidly reducing nickel slag to produce iron-nickel-copper alloy powder in kiln under reducing atmosphere | |
| CN112934924A (en) | Method for recovering iron powder by direct reduction of red mud | |
| CN108380360B (en) | Production process of steel slag and iron fine powder | |
| CN103484684B (en) | No-pollution treatment method of electrolytic aluminum smelting aluminum slag | |
| CN102839278B (en) | Method for extracting iron from iron mine tailings through strong magnetic, pre-concentration deep reduction | |
| CN103276219B (en) | Clean production method for treating waste residues of reduction roasting nickel laterite ore to prepare ferronickel | |
| CN104084307B (en) | The wet magnetic separation technique of iron is reclaimed in a kind of iron-containing waste | |
| CN101954487A (en) | Vanadium-titanium-iron polymetallic ore preparation method by direct reduction of coal derived and application thereof | |
| CN112851167A (en) | Method for producing sintered colored sand by using tailings as raw materials | |
| CN106636521A (en) | Method and system for improving grinding separation effect of reduced pellets containing metal iron | |
| CN112642580A (en) | Disposal method for gradient utilization of steel slag | |
| CN110433956B (en) | Method for recovering zinc, iron and/or carbon from blast furnace gas ash | |
| CN113979655B (en) | Modified steel slag based on steel dust mud and red mud, and preparation method and application thereof | |
| CN109402316B (en) | Financial-division comprehensive recovery method for rapidly reducing supergravity slag from neodymium-iron-boron waste acid leaching slag | |
| CN104891855A (en) | A method of extracting rare earth sulfate from coal gangue and applying the rare earth sulfate as a concrete additive | |
| CN105296747B (en) | A kind of method of comprehensive utilization of low-grade complex Ferromanganese Ore | |
| CN110655942A (en) | Method for preparing high-reactivity coke by adding steel slag to participate in coking process of coal | |
| CN102886308B (en) | Method for recycling waste rare-earth polishing powder | |
| CN111068886A (en) | Method for producing high-purity reduced iron powder from red mud |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20200312 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |