CN103131861A - Integrated utilization method of ironmaking dust removal ash - Google Patents
Integrated utilization method of ironmaking dust removal ash Download PDFInfo
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- CN103131861A CN103131861A CN2013100777078A CN201310077707A CN103131861A CN 103131861 A CN103131861 A CN 103131861A CN 2013100777078 A CN2013100777078 A CN 2013100777078A CN 201310077707 A CN201310077707 A CN 201310077707A CN 103131861 A CN103131861 A CN 103131861A
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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 integral body of smelting iron dedusting ash is utilized method.
Background technology
The 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.The 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 the ironmaking dedusting ash, zinc content is up to 20%, and recycle is worth high.
At present abroad the recovery method of the metals resources of ironmaking dedusting ash is had 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 the Webster oven process to process ironmaking precipitator dust reclaim zinc oxide, and fluctuation of service affects quality product and output; Ma'an Mountain research institute 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 ore deposit 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, and can not realize smelting iron the integral body utilization of dedusting ash, causes the wasting of resources.
Summary of the invention
The objective of the invention is for above-mentioned problems of the prior art, provide a kind of integral body of smelting iron dedusting ash to utilize method, reach the complete recycle of ironmaking dedusting ash.
The present invention for achieving the above object, the technical scheme that adopts is: a kind of integral body of smelting iron dedusting ash is utilized method, comprises the following steps:
1. pulping: will smelt iron and add water in dedusting ash to stir into concentration be 30% raw material slip, add kerosene and pine camphor oil to stir in the raw material slip, obtain mixed slurry, wherein, add kerosene 550-600g/t and pine camphor oil 130-180g/t in ironmaking dedusting ash per ton;
2. carbon is carried in flotation: mixed slurry is carried out the carbon flotation, obtain grade and be 68.6% regeneration carbon dust I and tailing slip, then again add kerosene and pine camphor oil to stir in the tailing slip, slip after stirring is scanned, obtain grade and be 62% regeneration carbon dust II and tailings, obtain grade after regeneration carbon dust I and regeneration carbon dust II are merged and be 66% regeneration carbon dust, wherein, add kerosene 280-300g/t and pine camphor oil 70-80g/t in ironmaking dedusting ash per ton;
3. zinc, iron reduction: tailings is placed in successively carries out filter dehydration and oven dry in filter, dryer, add the coke reductive agent of tailings weight 8-12% in tailings after the oven dry, mix and be placed in rotary kiln, stop 70-80min under 1000-1150 ℃ and carry out zinc, iron reduction, to obtain grade be 51% Zinc oxide powder and discharge kiln slag;
4. shrend slag stewing: kiln slag is carried out 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 is completed, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, oversize is placed in carries out fragmentation in crusher, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is the granularity qualified product;
6. iron is selected in magnetic separation: the granularity qualified product are carried out dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, the dry separation concentrate is through sieving, be ground to granularity≤0.1mm, carry out the wet magnetic separation operation, magneticstrength is 100mT, obtains grade and be 67% iron ore concentrate and grade and be 36% iron rough;
7. water-permeable brick preparation: first the dry separation tailings is once sieved, oversize adds cement, after stirring, water carries out pressure forming for the first time, lower floor as water-permeable brick, the screen undersize of once screening is carried out regrading, oversize adds cement, after stirring, water carries out pressure forming for the second time, middle level as water-permeable brick, the screen undersize of regrading is added cement, after stirring, water carries out pressure forming for the third time, upper strata as water-permeable brick, the slag gray scale of three pressure formings is 3:1, water consumption is 10% of each layer 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 the finished product water-permeable brick.
Add kerosene 580g/t and pine camphor oil 150g/t in the ironmaking dedusting ash per ton of step described in 1..
Add kerosene 290g/t and pine camphor oil 75g/t in the ironmaking dedusting ash per ton of step described in 2..
The once size of mesh of screening of step described in 7. is 2mm, and the pressure of pressure forming for the first time is 2.0-2.5MPa; The size of mesh of regrading is 0.6mm, and the pressure of pressure forming for the second time is 3.5-3.75MPa; The pressure of pressure forming for the third time is 5-5.35MPa.
A kind of integral body of smelting iron dedusting ash of the present invention is utilized method, and concrete step is:
1. pulping: 10t is smelted iron add 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 the raw material slip, obtain mixed slurry;
2. carbon is carried in flotation: mixed slurry is carried out the carbon flotation, obtain the 2.1t grade and be 68.6% regeneration carbon dust I and tailing slip, then again add 2.9kg kerosene and 0.75kg pine camphor oil to stir in the tailing slip, slip after stirring is scanned, obtain the 4.1t grade and be 62% regeneration carbon dust II and tailings, 2.1t is regenerated, and to obtain grade after carbon dust I and 4.1t regeneration carbon dust II merge be 66% regeneration carbon dust 6.2t;
3. zinc, iron reduction: tailings is placed in successively carries out filter dehydration and oven dry in filter, dryer, to the oven dry after the 6.2t tailings in add 615kg coke reductive agent, mix and be placed in rotary kiln, stop 75min under 1100 ℃ and carry out zinc, iron reduction, obtain the 1.5t grade and be 51% Zinc oxide powder, and discharge kiln slag;
4. shrend slag stewing: kiln slag is carried out 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 is completed, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, oversize is placed in carries out fragmentation in crusher, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is the granularity qualified product;
6. iron is selected in magnetic separation: the granularity qualified product are carried out dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, the dry separation concentrate is through sieving, be ground to granularity≤0.1mm, carry out the wet magnetic separation operation, magneticstrength is 100mT, obtains the 937.3kg grade and be 67% iron ore concentrate, and the 811.1kg grade is that 36% iron is rough;
7. water-permeable brick preparation: first the dry separation tailings is once sieved, oversize 938.4kg adds 312.8kg cement, 93.8kg carry out pressure forming for the first time after water stirs, lower floor as water-permeable brick, the screen undersize of once screening is carried out regrading, oversize 1.1t adds 375.4kg cement, 112.6kg carry out pressure forming for the second time after water stirs, middle level as water-permeable brick, the screen undersize 750.7kg of regrading is added 250.2kg cement, 75.1kg carry out pressure forming for the third time after water stirs, upper strata as water-permeable brick, wherein, once the size of mesh of screening is 2mm, the pressure of pressure forming for the first time is 2.3MPa, the size of mesh of regrading is 0.6mm, and the pressure of pressure forming for the second time is 3.7MPa, the pressure of pressure forming for the third time is 5.2MPa, and amount of pigment 37.5kg, the water-permeable brick of three pressure formings obtain 207 of finished product water-permeable bricks through natural curing 28d.
A kind of integral body 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, realized the recycling of efficient recovery and the solid waste of resource, finally reach the integral body 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 the iron step all to carry out the grading recovery, is beneficial to the raising rate of recovery.Shrend slag stewing technical finesse kiln slag reduces the kiln slag granularity, reduces crushing process, has saved production cost.To the dry type magnetic separation tailings carry out hierarchical classification, three pressure formings prepare water-permeable brick, have 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 integral body of smelting iron dedusting ash of the present invention is utilized method, flotation is carried in the 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: the regenerative carbon grade powder is 66%, and the rate of recovery is 90.75%; The 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 integral body of smelting iron dedusting ash of the present invention is utilized method, comprises the following steps:
1. pulping: will smelt iron and add water in dedusting ash to stir into concentration be 30% raw material slip, add kerosene and pine camphor oil to stir in the raw material slip, obtain mixed slurry, wherein, add kerosene 550-600g/t and pine camphor oil 130-180g/t in ironmaking dedusting ash per ton;
2. carbon is carried in flotation: mixed slurry is carried out the carbon flotation, obtain grade and be 68.6% regeneration carbon dust I and tailing slip, then again add kerosene and pine camphor oil to stir in the tailing slip, slip after stirring is scanned, obtain grade and be 62% regeneration carbon dust II and tailings, obtain grade after regeneration carbon dust I and regeneration carbon dust II are merged and be 66% regeneration carbon dust, wherein, add kerosene 280-300g/t and pine camphor oil 70-80g/t in ironmaking dedusting ash per ton;
3. zinc, iron reduction: tailings is placed in successively carries out filter dehydration and oven dry in filter, dryer, add the coke reductive agent of tailings weight 8-12% in tailings after the oven dry, mix and be placed in rotary kiln, stop 70-80min under 1000-1150 ℃ and carry out zinc, iron reduction, to obtain grade be 51% Zinc oxide powder and discharge kiln slag;
4. shrend slag stewing: kiln slag is carried out 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 is completed, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, oversize is placed in carries out fragmentation in crusher, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is the granularity qualified product;
6. iron is selected in magnetic separation: the granularity qualified product are carried out dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, the dry separation concentrate is through sieving, be ground to granularity≤0.1mm, carry out the wet magnetic separation operation, magneticstrength is 100mT, obtains grade and be 67% iron ore concentrate and grade and be 36% iron rough;
7. water-permeable brick preparation: first the dry separation tailings is once sieved, oversize adds cement, after stirring, water carries out pressure forming for the first time, lower floor as water-permeable brick, the screen undersize of once screening is carried out regrading, oversize adds cement, after stirring, water carries out pressure forming for the second time, middle level as water-permeable brick, the screen undersize of regrading is added cement, after stirring, water carries out pressure forming for the third time, upper strata as water-permeable brick, the slag gray scale of three pressure formings is 3:1, water consumption is 10% of each layer 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 the finished product water-permeable brick.
Preferred embodiments of the present invention are:
Add kerosene 580g/t and pine camphor oil 150g/t in the ironmaking dedusting ash per ton of step described in 1..Take kerosene as collecting agent, pine camphor oil can make the rate of recovery of regeneration carbon dust I reach maximum value in flotation stage as the preferred consumption of pore forming material.
Add kerosene 290g/t and pine camphor oil 75g/t in the ironmaking dedusting ash per ton of step described in 2..This preferred consumption can make the rate of recovery of regeneration carbon dust II reach maximum value in the stage of scanning.
The once size of mesh of screening of step described in 7. is 2mm, and the pressure of pressure forming for the first time is 2.0-2.5MPa; The size of mesh of regrading is 0.6mm, and the pressure of pressure forming for the second time is 3.5-3.75MPa; The pressure of pressure forming for the third time is 5-5.35MPa.Preferred size of mesh can reach more excellent permeability rate.Preferred pressure forming pressure makes the water-permeable brick of preparation have more excellent ultimate compression strength.
A kind of integral body of smelting iron dedusting ash of the present invention utilizes method that following specific embodiment can be arranged:
Embodiment 1: a kind of integral body of smelting iron dedusting ash utilizes the concrete steps of method to be:
1. pulping: 1t is smelted iron add 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 the raw material slip, obtain mixed slurry;
2. carbon is carried in flotation: mixed slurry is carried out the carbon flotation, obtain the 112.64kg grade and be 68.6% regeneration carbon dust I and tailing slip, then again add 280g kerosene and 70g pine camphor oil to stir in the tailing slip, slip after stirring is scanned, obtain the 225.28kg grade and be 62% regeneration carbon dust II and tailings, 112.64kg is regenerated, and to obtain grade after carbon dust I and 225.28kg regeneration carbon dust II merges be 66% regeneration carbon dust 337.92kg, and the rate of recovery is 89.21%;
3. zinc, iron reduction: tailings is placed in successively carries out filter dehydration and oven dry in filter, dryer, to the oven dry after the 896kg tailings in add 71.68kg coke reductive agent, mix and be placed in rotary kiln, stop 70min under 1000 ℃ and carry out zinc, iron reduction, obtain the 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 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 is completed, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, oversize is placed in carries out fragmentation in crusher, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is the granularity qualified product;
6. iron is selected in magnetic separation: the granularity qualified product are carried out dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, the dry separation concentrate carries out the wet magnetic separation operation through sieving, being ground to granularity≤0.1mm, and magneticstrength is 100mT, obtain the 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 the dry separation tailings is once sieved, oversize 212.6kg adds 70.9kg cement, 21.3kg carry out pressure forming for the first time after water stirs, lower floor as water-permeable brick, the screen undersize of once screening is carried out regrading, oversize 255.1kg adds 85kg cement, 25.5kg carry out pressure forming for the second time after water stirs, middle level as water-permeable brick, the screen undersize 170.1kg of regrading is added 56.7kg cement, after stirring, 17kg water carries out pressure forming for the third time, upper strata as water-permeable brick, wherein, once the size of mesh of screening is 2mm, the pressure of pressure forming for the first time is 2.0MPa, the size of mesh of regrading is 0.6mm, and the pressure of pressure forming for the second time is 3.5MPa, the pressure of pressure forming for the third time is 5MPa, and amount of pigment 8.5kg, the water-permeable brick of three pressure formings obtain 47 of finished product water-permeable bricks through natural curing 28d.
Embodiment 2: a kind of integral body of smelting iron dedusting ash utilizes the concrete steps of method to be:
1. pulping: 10t is smelted iron add 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 the raw material slip, obtain mixed slurry;
2. carbon is carried in flotation: mixed slurry is carried out the carbon flotation, obtain the 2.1t grade and be 68.6% regeneration carbon dust I and tailing slip, then again add 2.9kg kerosene and 0.75kg pine camphor oil to stir in the tailing slip, slip after stirring is scanned, obtain the 4.1t grade and be 62% regeneration carbon dust II and tailings, 2.1t is regenerated, and to obtain grade after carbon dust I and 4.1t regeneration carbon dust II merges be 66% regeneration carbon dust 6.2t, and the rate of recovery is 90.75%;
3. zinc, iron reduction: tailings is placed in successively carries out filter dehydration and oven dry in filter, dryer, to the oven dry after the 6.2t tailings in add 615kg coke reductive agent, mix and be placed in rotary kiln, stop 75min under 1100 ℃ and carry out zinc, iron reduction, obtain the 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 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 is completed, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, oversize is placed in carries out fragmentation in crusher, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is the granularity qualified product;
6. iron is selected in magnetic separation: the granularity qualified product are carried out dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, the dry separation concentrate carries out the wet magnetic separation operation through sieving, being ground to granularity≤0.1mm, and magneticstrength is 100mT, obtain the 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 the dry separation tailings is once sieved, oversize 938.4kg adds 312.8kg cement, 93.8kg carry out pressure forming for the first time after water stirs, lower floor as water-permeable brick, the screen undersize of once screening is carried out regrading, oversize 1.1t adds 375.4kg cement, 112.6kg carry out pressure forming for the second time after water stirs, middle level as water-permeable brick, the screen undersize 750.7kg of regrading is added 250.2kg cement, 75.1kg carry out pressure forming for the third time after water stirs, upper strata as water-permeable brick, wherein, once the size of mesh of screening is 2mm, the pressure of pressure forming for the first time is 2.3MPa, the size of mesh of regrading is 0.6mm, and the pressure of pressure forming for the second time is 3.7MPa, the pressure of pressure forming for the third time is 5.2MPa, and amount of pigment 37.5kg, the water-permeable brick of three pressure formings obtain 207 of finished product water-permeable bricks through natural curing 28d.
Embodiment 3: a kind of integral body of smelting iron dedusting ash utilizes the concrete steps of method to be:
1. pulping: 100t is smelted iron add 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 the raw material slip, obtain mixed slurry;
2. carbon is carried in flotation: mixed slurry is carried out the carbon flotation, obtain the 13.3t grade and be 68.6% regeneration carbon dust I and tailing slip, then again add 30kg kerosene and 8kg pine camphor oil to stir in the tailing slip, slip after stirring is scanned, obtain the 26.6t grade and be 62% regeneration carbon dust II and tailings, 13.3t is regenerated, and to obtain grade after carbon dust I and 26.6t regeneration carbon dust II merges be 66% regeneration carbon dust 39.9t, and the rate of recovery is 87.94%;
3. zinc, iron reduction: tailings is placed in successively carries out filter dehydration and oven dry in filter, dryer, to the oven dry after the 83.5t tailings in add 10.02t coke reductive agent, mix and be placed in rotary kiln, stop 80min under 1150 ℃ and carry out zinc, iron reduction, obtain the 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 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 is completed, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, oversize is placed in carries out fragmentation in crusher, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is the granularity qualified product;
6. iron is selected in magnetic separation: the granularity qualified product are carried out dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, the dry separation concentrate carries out the wet magnetic separation operation through sieving, being ground to granularity≤0.1mm, and magneticstrength is 100mT, obtain the 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 the dry separation tailings is once sieved, oversize 16t adds 5.3t cement, 1.6t carry out pressure forming for the first time after water stirs, lower floor as water-permeable brick, the screen undersize of once screening is carried out regrading, oversize 19.1t adds 6.4t cement, 1.9t carry out pressure forming for the second time after water stirs, middle level as water-permeable brick, the screen undersize 120.8t of regrading is added 4.3t cement, 1.3t carry out pressure forming for the third time after water stirs, upper strata as water-permeable brick, wherein, once the size of mesh of screening is 2mm, the pressure of pressure forming for the first time is 2.5MPa, the size of mesh of regrading is 0.6mm, and the pressure of pressure forming for the second time is 3.75MPa, the pressure of pressure forming for the third time is 5.35MPa, and amount of pigment 6.04t, the water-permeable brick of three pressure formings obtain 3519 of finished product water-permeable bricks through natural curing 28d.
Claims (5)
1. an integral body of smelting iron dedusting ash is utilized method, it is characterized in that: comprise the following steps:
1. pulping: will smelt iron and add water in dedusting ash to stir into concentration be 30% raw material slip, add kerosene and pine camphor oil to stir in the raw material slip, obtain mixed slurry, wherein, add kerosene 550-600g/t and pine camphor oil 130-180g/t in ironmaking dedusting ash per ton;
2. carbon is carried in flotation: mixed slurry is carried out the carbon flotation, obtain grade and be 68.6% regeneration carbon dust I and tailing slip, then again add kerosene and pine camphor oil to stir in the tailing slip, slip after stirring is scanned, obtain grade and be 62% regeneration carbon dust II and tailings, obtain grade after regeneration carbon dust I and regeneration carbon dust II are merged and be 66% regeneration carbon dust, wherein, add kerosene 280-300g/t and pine camphor oil 70-80g/t in ironmaking dedusting ash per ton;
3. zinc, iron reduction: tailings is placed in successively carries out filter dehydration and oven dry in filter, dryer, add the coke reductive agent of tailings weight 8-12% in tailings after the oven dry, mix and be placed in rotary kiln, stop 70-80min under 1000-1150 ℃ and carry out zinc, iron reduction, to obtain grade be 51% Zinc oxide powder and discharge kiln slag;
4. shrend slag stewing: kiln slag is carried out 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 is completed, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, oversize is placed in carries out fragmentation in crusher, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is the granularity qualified product;
6. iron is selected in magnetic separation: the granularity qualified product are carried out dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, the dry separation concentrate is through sieving, be ground to granularity≤0.1mm, carry out the wet magnetic separation operation, magneticstrength is 100mT, obtains grade and be 67% iron ore concentrate and grade and be 36% iron rough;
7. water-permeable brick preparation: first the dry separation tailings is once sieved, oversize adds cement, after stirring, water carries out pressure forming for the first time, lower floor as water-permeable brick, the screen undersize of once screening is carried out regrading, oversize adds cement, after stirring, water carries out pressure forming for the second time, middle level as water-permeable brick, the screen undersize of regrading is added cement, after stirring, water carries out pressure forming for the third time, upper strata as water-permeable brick, the slag gray scale of three pressure formings is 3:1, water consumption is 10% of each layer 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 the finished product water-permeable brick.
2. a kind of integral body of smelting iron dedusting ash according to claim 1 is utilized method, it is characterized in that: add kerosene 580g/t and pine camphor oil 150g/t in the ironmaking dedusting ash per ton of step described in 1..
3. a kind of integral body of smelting iron dedusting ash according to claim 1 is utilized method, it is characterized in that: add kerosene 290g/t and pine camphor oil 75g/t in the ironmaking dedusting ash per ton of step described in 2..
4. a kind of integral body 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 7. is 2mm, and the pressure of pressure forming for the first time is 2.0-2.5MPa; The size of mesh of regrading is 0.6mm, and the pressure of pressure forming for the second time is 3.5-3.75MPa; The pressure of pressure forming for the third time is 5-5.35MPa.
5. a kind of integral body of smelting iron dedusting ash according to claim 1 is utilized method, and it is characterized in that: concrete step is:
1. pulping: 10t is smelted iron add 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 the raw material slip, obtain mixed slurry;
2. carbon is carried in flotation: mixed slurry is carried out the carbon flotation, obtain the 2.1t grade and be 68.6% regeneration carbon dust I and tailing slip, then again add 2.9kg kerosene and 0.75kg pine camphor oil to stir in the tailing slip, slip after stirring is scanned, obtain the 4.1t grade and be 62% regeneration carbon dust II and tailings, 2.1t is regenerated, and to obtain grade after carbon dust I and 4.1t regeneration carbon dust II merge be 66% regeneration carbon dust 6.2t;
3. zinc, iron reduction: tailings is placed in successively carries out filter dehydration and oven dry in filter, dryer, to the oven dry after the 6.2t tailings in add 615kg coke reductive agent, mix and be placed in rotary kiln, stop 75min under 1100 ℃ and carry out zinc, iron reduction, obtain the 1.5t grade and be 51% Zinc oxide powder, and discharge kiln slag;
4. shrend slag stewing: kiln slag is carried out 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 is completed, and obtains Water Quenching Slag;
5. screening is broken: Water Quenching Slag is sieved, and size of mesh is 4mm, oversize is placed in carries out fragmentation in crusher, and the product after fragmentation continues to sieve by above-mentioned size, forms closed circuitly, and screen undersize is the granularity qualified product;
6. iron is selected in magnetic separation: the granularity qualified product are carried out dry type magnetic separation, magneticstrength is 250mT, obtain dry separation concentrate and dry separation tailings, the dry separation concentrate is through sieving, be ground to granularity≤0.1mm, carry out the wet magnetic separation operation, magneticstrength is 100mT, obtains the 937.3kg grade and be 67% iron ore concentrate and 811.1kg grade and be 36% iron rough;
7. water-permeable brick preparation: first the dry separation tailings is once sieved, oversize 938.4kg adds 312.8kg cement, 93.8kg carry out pressure forming for the first time after water stirs, lower floor as water-permeable brick, the screen undersize of once screening is carried out regrading, oversize 1.1t adds 375.4kg cement, 112.6kg carry out pressure forming for the second time after water stirs, middle level as water-permeable brick, the screen undersize 750.7kg of regrading is added 250.2kg cement, 75.1kg carry out pressure forming for the third time after water stirs, upper strata as water-permeable brick, wherein, once the size of mesh of screening is 2mm, the pressure of pressure forming for the first time is 2.3MPa, the size of mesh of regrading is 0.6mm, and the pressure of pressure forming for the second time is 3.7MPa, the pressure of pressure forming for the third time is 5.2MPa, and amount of pigment 37.5kg, the water-permeable brick of three pressure formings obtain 207 of finished product water-permeable bricks through natural curing 28d.
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| CN104028384A (en) * | 2014-06-04 | 2014-09-10 | 孙伟 | Method for treating blast furnace fume and recycling iron and zinc |
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| 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 |
| CN106191453A (en) * | 2016-08-31 | 2016-12-07 | 四川省新源泰环保科技有限责任公司 | A kind of rotary hearth furnace dirt ash is utilized to reclaim zinc enriched substance and the method for potassium chloride |
| CN106702171A (en) * | 2017-02-07 | 2017-05-24 | 山东大正节能环保科技有限公司 | Process of extracting zinc from dedusting ash of blast furnace |
| 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 |
| CN109530075A (en) * | 2017-09-22 | 2019-03-29 | 中南大学 | A method of carbonaceous is separated and recovered from the raw material low-cost high-efficiency containing carbonaceous |
| 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 |
| CN109265102A (en) * | 2018-09-30 | 2019-01-25 | 合肥仁创铸造材料有限公司 | A kind of casting dedusting ash method for innocent treatment |
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| 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 |
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