CN101805812B - Method for refining metal and preparing building material from mineral - Google Patents
Method for refining metal and preparing building material from mineral Download PDFInfo
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- CN101805812B CN101805812B CN2010101509256A CN201010150925A CN101805812B CN 101805812 B CN101805812 B CN 101805812B CN 2010101509256 A CN2010101509256 A CN 2010101509256A CN 201010150925 A CN201010150925 A CN 201010150925A CN 101805812 B CN101805812 B CN 101805812B
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- building materials
- slag
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- 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
Abstract
The invention discloses a method for refining metal and preparing building material from mineral, including the following steps: (1) mineral is enriched to obtain ore concentrate and tailings, and the tailings is recycled as building material raw material for use; (2) the ore concentrate is smelted, so as to obtain metallurgic product, waste gas, slag and cinder; (3) the waste gas is absorbed and precipitated to obtain precipitate, the precipitate is recycled as building material raw material for use; (4) the cinder is subject to water quenching treatment to obtain water granulated slag, and the water granulated slag is recycled as building material for use; (5) the tailings, precipitate, slag and water granulated slag for use are formed in proportion, so as to obtain building material. The invention has the advantages of environmental protection, energy saving and high energy utilization rate.
Description
Technical field
The present invention relates to the metal extraction techniques field, particularly a kind of from mineral extracting metals and prepare the method for building materials.
Background technology
Metal is the important materials during modernization industry is produced.The metal great majority are to extract from metal-containing minerals through certain process and equipment to obtain.In Metal smelting technology now, comparatively common is: utilize reductive agent, through being heated to certain temperature and through certain recovery time, metal-containing minerals being reduced, thereby obtain metal.The method of these extracting metals does not all comprise to producing the comprehensive utilization of refuse in the extracting metals process, therefore; This kind extracts metal process, though can refine a certain amount of metal, and meanwhile; Also cause huge energy consumption, the wasting of resources, cause pollution physical environment.
Summary of the invention
The objective of the invention is to, provide a kind of from mineral extracting metals and prepare the method for building materials, in extracting metals, also the refuse that produces of comprehensive utilization reclaims the preparation material of construction with it.
For solving above technical problem, technical scheme of the present invention is, a kind of from mineral extracting metals and prepare the method for building materials, comprise the steps:
1) mineral is carried out enrichment, obtain concentrate and tailings, reclaim for use as the building materials raw material tailings;
2) again concentrate is smelted, obtained metallurgic product, waste gas, slag and slag;
3) to waste gas absorb, precipitation process, obtain throw out, with recycling precipitate, for use as the building materials raw material;
4) slag is carried out Water Quenching and obtain grain slag, reclaim grain slag, for use as the building materials raw material;
5) tailings for use, throw out, slag, grain slag are carried out moulding in proportion, process building materials.
Preferably, said absorption, precipitation process are: to waste gas with Ca (OH)
2Solution absorbs, precipitates, and obtains throw out.
Preferably, said absorption, precipitation process also can be: waste gas is absorbed with alkali lye, the process water of discharging is added contain Ca
2+Solution precipitates, and obtains throw out.
Preferably, said alkali lye is Na
2CO
3And NaOH solution; The said Ca that contains
2+Solution is Ca (OH)
2Solution.
Preferably, in the step 4), the part grain slag is ground activation, process the activation grain slag remake into the building materials raw material for use; The part grain slag is carried out fragmentation, processes granular grain slag, remake into the building materials raw material for use.
Preferably, the specific surface area of said activation grain slag is 300m
2/ kg～800m
2/ kg, the median size of said granular grain slag is 1mm～10mm.
Preferably, said enrichment is a beneficiation method: any one or more in high intensity magnetic separation, magnetic separation, gravity treatment, flotation, electric separation, roasting, the leaching.
Preferably, the smelting step 2) is: with concentrate with smelt after metallurgy additive mixes.
Preferably, said smelting is: concentrate is sent in the metallurgical furnace, be heated to predetermined smelting temperature, keep this temperature to continue predetermined tap to tap time, obtain metallurgic product and slag.
Preferably, said metallurgical furnace is any in coal furnace, hotblast stove, fluidizing furnace, Circulation fluidized-bed furnace, chain furnace, tunnel, rotary kiln, rotary hearth furnace, electrothermal oven, resistance furnace, electric arc furnace, converter, intermediate frequency furnace, rotary hearth furnace, the hot stove in ore deposit, blast furnace, electrothermal oven, resistance furnace, coal furnace, gas furnace, the open hearth.
Preferably, also comprise waste heat recovery processing, cool off, heat is reclaimed through heat-conducting medium, be used for dry mineral or generating or add hot water smelting reacted high-temperature flue gas.
Preferably, the water cycle in the production process is used.
Preferably, being shaped in the step 5): extrude, in the briquetting, sintering any.
Preferably, in the step 5), said tailings, grain slag, throw out, slag are in following ratio moulding: 6～8 parts of tailings, 2～5 parts of grain slags, 0.1～0.5 part of throw out, 1～2 part in slag; Wherein, in the grain slag, the activation grain slag is 1～2 part, and granular grain slag is 0～4 part.
Preferably, said building materials are: non-burning brick, aerating brick, materials for wall or vitrified brick.
Compared with prior art, the present invention has following advantage:
Mineral being carried out in each step of metal smelting,, in metal smelting, the refuse that produces in the smelting process is carried out comprehensive reutilization through recovering step is set; Reclaim as the raw material used of preparation material of construction, the feedstock production material of construction that recovery is obtained, thus significantly reduce waste discharge; Reduce energy dissipation, improve rate of energy, be of value to environment protection simultaneously; Also practiced thrift production cost,, obtained bigger economic benefit refuse reclamation.
Description of drawings
Fig. 1 is the present invention's extracting metals and prepare the schema of the method for building materials from mineral;
Fig. 2 is the present invention's extracting metals and prepare the schema of method one preferred embodiment of building materials from mineral.
Embodiment
Basic design of the present invention is, mineral are carried out metal smelting, simultaneously in extractive process through adding the step of recycling refuse, make that in extracting metals refuse can be recovered utilization, the raw material of using as the preparation material of construction prepares building materials.
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Referring to Fig. 1, of the present invention from mineral extracting metals and prepare the method for building materials raw material, comprising:
S1, mineral are carried out enrichment, obtain concentrate and tailings, reclaim for use as the building materials raw material tailings;
S2, concentrate is smelted, obtained metallurgic product, waste gas, slag and slag;
S3, to waste gas absorb, precipitation process, obtain throw out, with recycling precipitate, for use as the building materials raw material;
S4, slag is carried out Water Quenching obtain grain slag, reclaim grain slag, for use as the building materials raw material;
S5, the tailings with for use, throw out, slag, grain slag carry out moulding in proportion, process building materials.
Below be that example elaborates to the present invention to contain tin-iron mine, idiographic flow is referring to Fig. 2:
In this tin-iron mine, wherein tin content is: 0.33%, and iron level is: 14.83%, utilize method of the present invention to handle to this tin-iron mine.
Concrete treatment step is:
1) tin-iron mine is carried out enrichment
Tin-iron mine is carried out enrichment, also is ore dressing.Adopt the wet method high intensity magnetic separation in the present embodiment, the dust that this kind ore dressing mode produces is few, helps environment protection.Concrete ore dressing process is following:
The tin-iron mine of handling well is added water stir, process concentration and be 20% ore pulp, ore pulp is pumped into takes off ballast screen and take off slag, then send into intensity magnetic separator again, add water and carry out the wet method high intensity magnetic separation.The high intensity magnetic separation sorting operation of mineral slightly sweeps by one and constitutes, and roughly selects and obtains iron tin collective concentrate.Scan mine tailing and drain into the mine tailing storehouse as true tailings, scavenger concentrate turns back to as chats and roughly selects operation and select, with the tailings that finally obtains as the building materials raw material for standby.The ore dressing mode of this step also can adopt in magnetic separation, gravity treatment, flotation, electric separation, roasting, the leaching any or multiple.
To pass through the concentrate that high intensity magnetic separation obtains and carry out processed: adopt two sections flow processs, first section for concentrating, and concentrated underflow is pumped to filter and carries out second section dehydration.Filter cake is as the final concentrate powder, and concentrated operation is returned in the filtrating pumping.The overflow water that concentrates operation uses as the ore dressing backwater circulation.
2) concentrate
The refined tin powdered iron ore of handling well is added metallurgy additive smelts.Wherein, metallurgy additive comprises that the good particle diameter of milled processed is that coal particle (reductive agent) and the median size of 1mm～2.5mm is the CaCl of 0.074mm
2(fuming agent), CaCO
3(additive), wherein, the particle diameter of coal particle can be the arbitrary value among 1mm～2.5mm, like 1mm, 1.5mm, 2mm, 2.2mm, 2.5mm, concrete smelting process is following:
Refined tin powdered iron ore and metallurgy additive are mixed, stirred after weighing, batching; Material is delivered to nodulizer and is made ball forming behind abundant stirring and evenly mixing; Wherein, refined tin powdered iron ore, coal particle, CaCl in the mixture
2, CaCO
3Weight ratio be 5: 3: 2: 1.
Moulding ore deposit ball evenly is laid on the fuming chassis by material distributing machine, gets in fuming reduction furnace-horizontal type zone heating tunnel.In this kind tunnel; Coloured element such as tin reacts with the fuming agent down at 1150 ℃ in the ball of ore deposit; Generate lower boiling sn-containing compound, and in the volatilization entering flue gas, non-ferrous metals such as most of tin get into after the flue gas dust collection system in the flue dust; To the processing of cooling off, gather dust of this flue dust, obtain high-load fuming tin product; Ferriferous oxide in the ball of ore deposit progressively reduces, metallizes in the fuming reduction furnace, becomes the iron content pelletizing of high degree of metalization; Then; With the fusing in the electric arc furnace (smelting furnace) of packing into of the iron content pelletizing of high degree of metalization, slag, iron separate after the iron content pellets will, and iron liquid is cast iron block through pig-casting machine; Become grain slag after the water quenched slag; This grain slag part is broken into the particle that median size is 3mm～8mm after draining is handled, for use as the building materials raw material, a part of grain slag grind process after the activation behind the activation grain slag for use as the building materials raw material.In this smelting process, the slag of generation is for use as the raw material of preparation building materials.
In this method, electric arc furnace places enclosed hood, and dust spasm to the fly-ash separator that flue gas that produces during fusing and weighing room produce is handled, and such design can reduce the dust emissions amount in the production, plays the effect of protection environment.
3) waste gas absorption, precipitation process
In the fuming reduction process; Fuming agent-calcium chloride and tin-iron mine reaction; Generate volatilizable tin protochloride, after overcooling, collect, waste gas such as also residual more chlorine, hydrogenchloride, oxynitrides, sulfurous gas and part carbon monoxide in flue gas through bagroom.This waste gas is adopted Na
2CO
3Solution, NaOH solution (recycling) are removed the SO in the flue gas through gas, the liquid contact of eluting column absorption fluids
2, Cl
2, HCl, oxides of nitrogen gas.
The process water of discharging from eluting column flows into Ca (OH)
2Solution precipitation pond deposition through three grades of post precipitations, finally generates the calcium sulfate precipitation thing, and the calcium sulfate of post precipitation is for use as the building materials raw material after dewatering.Supernatant is sent into a circulating water pool, and small portion contains Ca
+ 2, Cl
-1Supernatant returns use as the additive of metal reduction reaction.The disposable additional adding NaOH of remaining supernatant squeezes into eluting column through lye pump and reuses as absorption liquid, and flue gas is absorbed processing.In this step, the also available Ca that contains
2+Alkali lye to waste gas directly absorb, precipitation process, contain Ca
2+Alkali lye can be used Ca (OH)
2Solution.
In the fuming furnace flue, flue gas-air heat exchanger is set, flue-gas temperature is dropped to 250 ℃, AT is heated to 400 ℃ by 20 ℃, and it is combustion-supporting that warm air is delivered to the producer gas of feed chamber dried feed and fuming reduction furnace respectively, also can be used to generating.
4) preparation building materials
Get 6 parts of tailings for use, 1 part of activation grain slag, 2 parts of granular grain slags, 0.3 part of throw out, 1 part of mixing of slag, moulding, obtain non-burning brick.
Can be drawn by the above embodiment that contains tin-iron mine extracting metals and preparation building materials: method of the present invention is in same extracting metals process; Extract pink salt and fe; And the waste discharge amount is few in the extractive process; Throw out-the calcium sulfate that produces when the grain slag that the slag that produces when the slag that the tailings that produces during ore dressing, fuming reduction furnace produce, melting and reducing carries out obtaining after the shrend, absorbing waste gas all uses as the non-burning brick whole raw materials of preparation, need not remove to buy the non-burning brick starting material of preparation again, and energy utilization rate is high; In the protection environment, further increase economic benefit.
Certainly, the present invention is also applicable to limonite, rhombohedral iron ore, magnetite, josephinite, ferrous manganese ore, the comprehensive extraction of chromite, utilization.
Only be preferred implementation of the present invention below, should be pointed out that above-mentioned preferred implementation should not be regarded as limitation of the present invention, protection scope of the present invention should be as the criterion with claim institute restricted portion.For those skilled in the art, do not breaking away from the spirit and scope of the present invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (11)
1. an extracting metals and prepare the method for building materials from mineral is characterized in that, comprises the steps:
1) mineral is carried out enrichment, obtain concentrate and tailings, reclaim for use as the building materials raw material tailings;
2) again concentrate is smelted, obtained metallurgic product, waste gas, slag and slag;
3) to waste gas absorb, precipitation process, obtain throw out, with recycling precipitate, for use as the building materials raw material; Said to waste gas absorb, precipitation process is: to waste gas with Ca (OH)
2Solution absorbs, precipitates; Or waste gas used Na
2CO
3Reach NaOH solution and absorb, the process water of discharging is added Ca (OH)
2Solution precipitates;
4) slag is carried out Water Quenching and obtain grain slag, reclaim grain slag, for use as the building materials raw material;
5) with tailings for use, grain slag, throw out, slag in following ratio moulding: 6～8 parts of tailings, 2～5 parts of grain slags, 0.1～0.5 part of throw out, 1～2 part in slag, wherein, 1～2 part of activation grain slag, 0～4 part of granular grain slag is processed building materials;
Said mineral are tin-iron mine, limonite, rhombohedral iron ore, magnetite, josephinite, ferrous manganese ore, chromite.
2. as claimed in claim 1 from mineral extracting metals and prepare the method for building materials, it is characterized in that, in the step 4), the part grain slag is ground activation, process the activation grain slag remake into the building materials raw material for use; The part grain slag is carried out fragmentation, processes granular grain slag, remake into the building materials raw material for use.
3. as claimed in claim 2 from mineral extracting metals and prepare the method for building materials, it is characterized in that the specific surface area of said activation grain slag is 300m
2/ kg～800m
2/ kg, the median size of said granular grain slag is 1mm～10mm.
4. as claimed in claim 1 from mineral extracting metals and prepare the method for building materials, it is characterized in that said enrichment is a beneficiation method: any one or more in magnetic separation, gravity treatment, flotation, electric separation, roasting, the leaching.
5. as claimed in claim 1 from mineral extracting metals and prepare the method for building materials, it is characterized in that step 2) in smelting be: with concentrate with smelt after metallurgy additive mixes.
6. as claimed in claim 1 from mineral extracting metals and prepare the method for building materials; It is characterized in that said smelting is: concentrate is sent in the metallurgical furnace, be heated to predetermined smelting temperature; Keep this temperature to continue predetermined tap to tap time, obtain metallurgic product and slag.
7. as claimed in claim 6 from mineral extracting metals and prepare the method for building materials; It is characterized in that said metallurgical furnace is any in coal furnace, hotblast stove, fluidizing furnace, Circulation fluidized-bed furnace, chain furnace, tunnel, rotary kiln, rotary hearth furnace, electrothermal oven, resistance furnace, electric arc furnace, converter, intermediate frequency furnace, the hot stove in ore deposit, blast furnace, gas furnace, the open hearth.
8. as claimed in claim 1 from mineral extracting metals and prepare the method for building materials; It is characterized in that, also comprise waste heat recovery processing, the high-temperature flue gas of smelting in the reacted waste gas is cooled off; Heat is reclaimed through heat-conducting medium, be used for dry mineral or generating or add hot water.
9. as claimed in claim 1 from mineral extracting metals and prepare the method for building materials, it is characterized in that, the water cycle in the production process is used.
10. as claimed in claim 1 from mineral extracting metals and prepare the method for building materials, it is characterized in that being shaped in the step 5): extrude, in the briquetting, sintering any.
11. as claimed in claim 1 from mineral extracting metals and prepare the method for building materials, it is characterized in that said building materials are materials for wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101509256A CN101805812B (en) | 2010-04-13 | 2010-04-13 | Method for refining metal and preparing building material from mineral |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101509256A CN101805812B (en) | 2010-04-13 | 2010-04-13 | Method for refining metal and preparing building material from mineral |
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|---|---|
| CN101805812A CN101805812A (en) | 2010-08-18 |
| CN101805812B true CN101805812B (en) | 2012-06-06 |
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| CN2010101509256A Expired - Fee Related CN101805812B (en) | 2010-04-13 | 2010-04-13 | Method for refining metal and preparing building material from mineral |
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| CN101403044A (en) * | 2008-10-27 | 2009-04-08 | 云南锡业集团（控股）有限责任公司 | Oxygen-enriched air smelting method for top-blown submergence smelting furnace for tin concentrate |
| CN101624654A (en) * | 2009-04-17 | 2010-01-13 | 华中科技大学 | Method for recycling iron and aluminum by particle size grading pretreatment of Bayer process red mud |
| CN101545037B (en) * | 2009-05-06 | 2010-12-08 | 个旧玉龙再生资源经营有限公司 | Method for producing iron ore concentrate by using poor-tin oxidized ore tailings |
| CN101570820B (en) * | 2009-06-16 | 2011-05-04 | 陈建湘 | Method for rapidly reducing and roasting as well as synchronously dephosphorizing and extracting iron at high temperature of high-silicon high-phosphorus iron ore |
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Owner name: QIANQIU ENERGY (SHANGHAI) CO., LTD. Free format text: FORMER OWNER: LI BAIRONG Effective date: 20130929 |
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Effective date of registration: 20130929 Address after: 201306 No. 340 A0201 neighborhood, Lingang hi tech industrialization base, Shanghai, Pudong New Area Patentee after: Future energy (Shanghai) Limited Address before: Guangyuan East Road Guangzhou Guangdong province 510000 City Sceneway Metro 1 Street 7 block 701 Patentee before: Li Bairong |
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