CN106636653A - Comprehensive utilization method of waste acid, caustic sludge and dedusting ash - Google Patents
Comprehensive utilization method of waste acid, caustic sludge and dedusting ash Download PDFInfo
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- CN106636653A CN106636653A CN201611235415.2A CN201611235415A CN106636653A CN 106636653 A CN106636653 A CN 106636653A CN 201611235415 A CN201611235415 A CN 201611235415A CN 106636653 A CN106636653 A CN 106636653A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/20—Halides
- C01F11/24—Chlorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0453—Treatment or purification of solutions, e.g. obtained by leaching
- C22B23/0461—Treatment or purification of solutions, e.g. obtained by leaching by chemical methods
- C22B23/0469—Treatment or purification of solutions, e.g. obtained by leaching by chemical methods by chemical substitution, e.g. by cementation
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
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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 comprehensive utilization method of waste acid, caustic sludge and dedusting ash. The method comprises the following steps: (1) mixing dedusting ash and waste hydrochloric acid, and stirring at 40-80 DEG C; (2) adding caustic sludge into the liquid obtained in the step (1), stirring while controlling the pH value, and filtering for separation, thereby obtaining a first solid and a first filtrate; and (3) adding a precipitant into the first filtrate, stirring, filtering for separation to obtain a second solid (powder containing zinc, nickel and cobalt) and a second filtrate, and carrying out evaporative concentration on the second filtrate to obtain a third solid. The method sufficiently recycles the wastewater-acid washing waste acid, waste residue-caustic sludge and waste gas-dedusting ash, sufficiently and comprehensively treats the three industrial wastes to recover the valuable metals, provides chlorinating agents by performing synergic chloridizing roasting on polymetallic ores, and creates economic benefits on the premise of solving the problem of environmental pollution.
Description
Technical field
The invention belongs to resource circulation utilization field, is related to the method for comprehensive utilization of a kind of spent acid, alkaline residue and dedusting ash.
Background technology
Steel plate is the important raw and processed materials of auto industry, household electrical appliance, Container Transport and Welded tube production industry.Due to putting
The surface of steel plate put too long often forms and is required for removing this layer through pickling before one layer of iron scale, therefore cold-rolling of steel plate
Iron scale, will so consume substantial amounts of hydrochloric acid, so as to generate substantial amounts of waste hydrochloric acid.In general, cold rolling mill is produced
The content of free hydrochloric acid is about 10wt% in the spent acid for going out, and the content of free iron is about 20～30wt%, while also containing
A small amount of nickel ion and cobalt ions；By taking a middle-size and small-size cold rolling mill as an example, up to tens of to the up to a hundred tons of its daily spent acid amount, and
Processing the method for the spent acid of cold rolling mill output at present mainly has neutralisation, roasting method, evaporation and sulfate substitution method etc..
Neutralisation is until reaching and can directly discharge after discharge standard using substantial amounts of lime with hydrochloric acid reaction.The method exists
Consume large quantities of lime simultaneously, also result in the waste of hydrochloric acid in a large amount of spent acid and frerrous chloride.Fe2 contained in waste liquid after discharge
+ be oxidized to after Fe3+ and make water body be changed into brown, soil compaction is caused, have a strong impact on ecological environment.Therefore, neutralisation is a kind of
The method of pollutant transfer, is only applicable to process a small amount of pickle liquor.
Roasting method is by the hydrochloric acid in high-temperature roasting waste acid recovery, while producing such as iron chloride or ferric oxide particles.Should
Method mainly has spray roasting and fluosolids roasting method.Spray roasting is by the way that spent acid is sprayed by the nozzle at the top of roaster
Enter in stove, the direct-fired mode of coal gas in point burner, finally spray obtains hydrochloric acid of living again from tail gas, and furnace bottom obtains iron oxide
Particle.The sintering temperature of the method is typically at 600-800 DEG C.Fluosolids roasting method is that spent acid is sprayed into into the flowing molten iron medium containing oxidation
In fluid bed, coal gas lights heating by bottom, finally gives live again hydrochloric acid and ferric oxide particles.The method advantage is that hydrochloric acid is returned
Yield is big, concentration is high, and the concentration of hydrochloric acid of recovery is 20% or so；Have the disadvantage that investment is high, including floor space is big, equipment investment
High, operating cost is high, civil engineering, complex structural designs, also including thermal source, the supply of cooling water.Simultaneously gained ferric oxide particles are miscellaneous
Quality is big, and purity is not high to cause price ground.Due to its so high input and energy consumption, it is merely capable of being used in large-scale acid at present
In the middle of washing machine group.
Evaporation is to evaporate spent acid under subnormal ambient, and hydrochloric acid and water are evaporated from spent acid, is reclaimed through cooling
Hydrochloric acid.Gained concentrate crystallisation by cooling, about 22% or so hydrochloric acid and frerrous chloride crystal are finally given Jing after separation of solid and liquid.Should
Method advantage is：The investment of civil engineering and equipment is less, without very complicated structure.But its production cycle is longer, treating capacity is not
Greatly, and gained concentrated mother liquor needs to return distillation Jing after separation of solid and liquid, energy consumption (steam, electricity etc.) is higher, is suitable for steel wire, steel pipe
And the less small-sized pickling unit of spent acid amount such as steel tower.
Sulfate substitution method is that, based on evaporation, the concentration of hydrochloric acid obtained by evaporation is relatively low, therefore is added in spent acid
Enter sulfuric acid, sulfuric acid and frerrous chloride occur displacement reaction, finally give ferrous sulfate and hydrochloric acid.Afterwards through negative pressure evaporation,
Separation of solid and liquid obtains the higher hydrochloric acid of concentration and errous sulfate crystal.The method gained concentration of hydrochloric acid is higher, while obtaining sulfuric acid
It is ferrous.But it is completely in reaction between ions, therefore gained acid solution while there is hydrochloric acid and sulphur because the reaction is displacement reaction
Sour ferrous, separating difficulty is larger.Simultaneously because ferrous sulfate is DDGS, its solubility is 66.67g, therefore, separation has certain
Difficulty, cause gained hydrochloric acid concentration be less than theoretical concentration.If excess sulfuric acid, a certain amount of sulphur can be contained in recovery acid
Acid, i.e., usually obtain nitration mixture, severe corrosion equipment.Further, since adding sulfuric acid, cost is caused also accordingly to increase, also can shadow
Ring benefit
Large type chemical products based on soda ash, since being born from 19 end of the centurys, just to the progressive tribute of world industry
Immense strength is offered.Between 2010～2014 years, China's soda ash production capacity is by 26,400,000 tons of enlargings in the end of the year 2010 by 2014
33000000 tons, average growth rate per annum about 5.2% becomes the first in the world soda manufacture big country.But, it is associated with " whole world eldest child " ring of light
Accompany, be alkaline residue discharge capacity first.Although China is gradually reduced using the proportion of ammonia-soda process soda ash, yield accounting is still near
Five to sixty percent or so.According to this ratio, the soda ash that ammonia-soda process is produced is 1400～17,000,000 tons or so.In the industry it is believed that
Often producing 1 ton of soda ash will discharge 10 cubic metres of waste liquids, wherein solids content (butt) about 3%.So, it is pure using ammonia-soda process
Alkali will produce 450～5,000,000 tons of alkaline residues.Contain a large amount of chlorions in alkaline residue, pH value is higher, the meeting again under the effect of the showers such as rainwater
Soil, polluted underground water are entered with water.Alkaline residue since the technique of invention ammonia-soda process alkaline, its environmental problem brought,
An always century difficult problem in global range.At present, alkali is avoided by way of the developed country such as America and Europe is eliminating ammonia-soda process
The pollution that slag brings.But China, due to the restriction of technology and resource, ammonia-soda process still cannot be eliminated completely, therefore, to process number
The so huge alkaline residue of amount, needs the high professional equipment of acquisition price and puts into high operation and maintenance cost.In face of cost,
Ge Jian factories are just left intact to alkaline residue, directly alkaline residue are piled up into river bank by the sea, so will certainly land occupation, but also
Entail dangers to navigation channel, causes the different degrees of pollution in marine site, river and silts up, or even jeopardizes culture fishery.
Dedusting ash (also known as blast furnace dust, cigarette ash or flue dust) is as blast furnace gas is carried out in blast furnace ironmaking process
Raw material dust and high-temperature region intense reaction and product obtained from the particulate Jing dry dust removals that produce, be the by-product of steel and iron industry
Product.Its main component is iron oxide and carbon, also there is the non-ferrous metal of recovery value containing a small amount of zinc, lead, indium, potassium, sodium and bismuth etc..
According to statistics, often produce l tons iron and will produce about 20 kilograms of dedusting ash containing zinc 10%～20%, by China Tangshan in 2012 steel is produced
1.7 hundred million tons of calculating, the year quantum of output estimation of Qian'an dedusting ash converts into 680,000～1,360,000 tons of metal Zn content, about at 17,000,000 tons
Equivalent to the yield of 11,000,000～22,000,000 tons of zinc ores.Meanwhile, China is again the country of potassium resource famine, therefore often
Year can also reclaim 850,000～1,300,000 tons of sylvite and as the raw material of chemical fertilizer.
With China's rapid development of economy, the demand of metal material is constantly expanded, the consumption for drastically expanding causes
The serious problems of each side such as resource, the energy and environment, become the key factor of restriction Chinese society and sustainable economic development.
Therefore, research on utilization is circulated to metal secondary resource, the high efficient separation technology of secondary resource is developed and is recycled skill
Art, carries out the recycling to dedusting ash, and the resource that not only can make preciousness is fully utilized, and can also mitigate solid and give up
Pollution of the material to environment.If dedusting ash resource is not fully utilized, a large amount of soils can be not only taken, also necessarily be caused to environment
Detrimental effect；Secondly, rising steadily with iron ore and metallic zinc price, if do not reclaim from dedusting ash iron, zinc,
The valuable elements such as lead, potassium, sodium come reduce ironmaking cost and increase income, certainly will be a kind of huge waste to dedusting ash.
As can be seen here, spent acid, alkaline residue and dedusting ash are all trade wastes, belong to three industrial wastes.If arbitrarily stacking not
If rationally disposing or recycling, serious pollution will certainly be caused to surrounding environment, while cannot reclaim various valuable
Metal.
The content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, there is provided the comprehensive profit of a kind of spent acid, alkaline residue and dedusting ash
Use method.
Technical scheme is summarized as follows：
The method of comprehensive utilization of a kind of spent acid, alkaline residue and dedusting ash, comprises the steps：
(1) it is 1g by solid-to-liquid ratio by dedusting ash and waste hydrochloric acid：The ratio mixing of 4～8mL, at 40～80 DEG C, in stirring speed
Rate is that 100-180r/min stirs 60～90min；
(2) mass fraction that alkaline residue is made in the liquid obtained by alkaline residue is added in step (1) is 80%～90%, stirring
And control ph is 7.5～8.5,40～60min is reacted, be separated by filtration, obtain the first solid (consolidating containing ferroso-ferric oxide and carbon
Body) and the first filtrate；
(3) precipitating reagent is added in the first filtrate make precipitating reagent mass fraction be 2%～3%, stirring 60～
80min, is separated by filtration, and obtains the second solid (containing zinc, nickel, the powder of cobalt) and the second filtrate, and the second filtrate Jing is concentrated by evaporation and obtains
3rd solid (mixed chlorinated dose of chloride containing potassium, calcium chloride, magnesium chloride and sodium chloride).
The dedusting ash is the dust that removing dust equipment is collected in blast furnace ironmaking process, and iron content exists in the dust
In the range of 40wt%～60wt% with Zn content in the range of 1wt%～20wt%.
The waste hydrochloric acid is gained waste hydrochloric acid after steel surface HCl treatment, in the waste hydrochloric acid iron content 100～
In the range of 300g/L, nickel content is in the range of 2～5g/L.
The alkaline residue be ammonia-soda process soda ash produce waste residue, in the waste residue calcium carbonate content 40wt%～
In the range of 60wt%, in the range of preferred 45wt%～55wt%.
Preferably：Precipitating reagent is calcium oxide of the purity more than or equal to 90%, hydroxide of the purity more than or equal to 90%
One or more in the high calcium powder of calcium and calcium content more than or equal to 8%.
The invention has the advantages that：
(1) present invention makes full use of industrial three kinds of wastes --- the valuable gold such as calcium in dedusting ash, waste hydrochloric acid and alkaline residue
Category, by trade waste recycling and is converted into high value-added product, fully reclaims iron, nickel, cobalt in waste hydrochloric acid etc.
Zinc, potassium, sodium, iron and carbon and the calcium in alkaline residue in valuable metal and hydrochloric acid, dedusting ash, while economic worth is created
Resource circulation utilization is carried out to trade waste, it is to avoid it significantly reduces environmental pressure to environment.
(2) present invention is this feature of calcium carbonate using the main component of alkaline residue, as precipitation except the additive of iron,
Can also avoid causing the redissolution of precipitation of iron ions to react due to crossing basicity while avoiding and adding other medicaments.
(3) product that the present invention finally gives is containing zinc, nickel, the powder of cobalt and calcium chloride, magnesium chloride, sodium chloride, chlorine
Change potassium mixed chlorinated dose.Potassium chloride can be used as the raw material of sylvite in chemical fertilizer, and calcium chloride, magnesium chloride and sodium chloride can
With directly as chlorinating agent, the first solid (containing ferroso-ferric oxide and carbon) obtained by cooperation carry out polymetallic ore (sulfate slag or
Lateritic nickel ore etc.) collaboration chloridising roasting, processing three industrial wastes and also providing for pyrometallurgy while reclaim valuable metal
Production raw material.
Description of the drawings
Fig. 1 is the process chart of the inventive method.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with drawings and Examples.Those skilled in the art will
It will be appreciated that following examples are only the preferred embodiments of the present invention, in order to more fully understand the present invention, thus limit is not construed as
Determine the scope of the present invention.For a person skilled in the art, the present invention can have various modifications and variations, all in the present invention
Spirit and principle within, any modification, equivalent or improvement for being made etc., should be included in protection scope of the present invention it
It is interior.
Experimental technique in following embodiments, if no special instructions, is conventional method；Experiment material used, such as without
Specified otherwise, is available from commercially available from routine biochemistry chemical reagent work.
Embodiment 1
The method of comprehensive utilization of a kind of spent acid, alkaline residue and dedusting ash, is shown in Fig. 1, comprises the steps：
(1) it is 1g by solid-to-liquid ratio by dedusting ash and waste hydrochloric acid：The ratio mixing of 6mL, at 50 DEG C, be in stir speed (S.S.)
120r/min stirs 70min；
(2) mass fraction that alkaline residue is made in the liquid obtained by alkaline residue is added in step (1) is 85%, stirs and controls
PH value reacts 50min 8, is separated by filtration, and obtains the first solid (solid containing ferroso-ferric oxide and carbon) and the first filtrate；
(3) precipitating reagent is added in the first filtrate make precipitating reagent mass fraction be 2.5%, stir 70min, filter point
From, the second solid (containing zinc, nickel, the powder of cobalt) and the second filtrate are obtained, the second filtrate Jing multiple-effect evaporations are concentrated to give the 3rd solid
(mixed chlorinated dose of chloride containing potassium, calcium chloride, magnesium chloride and sodium chloride).
Precipitating reagent is the calcium oxide that purity is equal to 90%.
The utilization rate of iron is 84.25% in final dedusting ash and spent acid, zinc, nickel, the rate of recovery of cobalt be respectively 92.77%,
84.04%th, 71.22%.
Embodiment 2
The method of comprehensive utilization of a kind of spent acid, alkaline residue and dedusting ash, comprises the steps：
(1) it is 1g by solid-to-liquid ratio by dedusting ash and waste hydrochloric acid：The ratio mixing of 4mL, at 80 DEG C, be in stir speed (S.S.)
180r/min stirs 60min；
(2) mass fraction that alkaline residue is made in the liquid obtained by alkaline residue is added in step (1) is 80%, stirs and controls
PH value reacts 60min 7.5, is separated by filtration, and obtains the first solid (solid containing ferroso-ferric oxide and carbon) and the first filtrate；
(3) precipitating reagent is added in the first filtrate make precipitating reagent mass fraction be 2%, stir 80min, filter point
From, the second solid (containing zinc, nickel, the powder of cobalt) and the second filtrate are obtained, it is (chloride that the second filtrate Jing evaporation and concentration obtains the 3rd solid
Change potassium, calcium chloride, magnesium chloride and sodium chloride mixed chlorinated dose).
Precipitating reagent is the calcium hydroxide that purity is equal to 94%.
The utilization rate of iron in final dedusting ash and spent acid, zinc, nickel, the rate of recovery of cobalt are respectively 91.27%, 85.06%,
70.72%.
Embodiment 3
The method of comprehensive utilization of a kind of spent acid, alkaline residue and dedusting ash, comprises the steps：
(1) it is 1g by solid-to-liquid ratio by dedusting ash and waste hydrochloric acid：The ratio mixing of 8mL, at 40 DEG C, be in stir speed (S.S.)
100r/min stirs 90min；
(2) mass fraction that alkaline residue is made in the liquid obtained by alkaline residue is added in step (1) is 90%, stirs and controls
PH value reacts 40min 8.5, is separated by filtration, and obtains the first solid (solid containing ferroso-ferric oxide and carbon) and the first filtrate；
(3) precipitating reagent is added in the first filtrate make precipitating reagent mass fraction be 3%, stir 60min, filter point
From, the second solid (containing zinc, nickel, the powder of cobalt) and the second filtrate are obtained, it is (chloride that the second filtrate Jing evaporation and concentration obtains the 3rd solid
Change potassium, calcium chloride, magnesium chloride and sodium chloride mixed chlorinated dose).
It is 1 that precipitating reagent is mass ratio：1：The composition of 1 calcium oxide, calcium hydroxide and high calcium powder, wherein：Calcium oxide
Purity be equal to 90%；The purity of calcium hydroxide is equal to 94%；Calcium content is equal to 10%. in high calcium powder
The utilization rate 77.89% of iron in final dedusting ash and spent acid, zinc, nickel, the rate of recovery of cobalt be respectively 89.55%,
84.17%th, 69.52%.
Dedusting ash described in embodiment 1-3 is the dust that removing dust equipment is collected in blast furnace ironmaking process, concrete in the dust
Composition is shown in Table 1.
Table 1
| Element | Fe | Zn | Pb | Mg | Mn | Si |
| Content (%) | 48.62 | 16.81 | 1.46 | 0.97 | 0.17 | 3.75 |
It is demonstrated experimentally that in dust arbitrary value of the iron content in the range of 40wt%～60wt% and Zn content 1wt%～
Arbitrary value in the range of 20wt% may be used to the present invention.
Waste hydrochloric acid described in embodiment 1-3 is gained waste hydrochloric acid, iron content in the waste hydrochloric acid after steel surface HCl treatment
238g/L, nickel content 4.2g/L, cobalt content 0.4g/L.
It is demonstrated experimentally that in waste hydrochloric acid iron content in the range of 100～300g/L, nickel content in the range of 2～5g/L appoint
Meaning value may be used to the present invention.
Alkaline residue described in embodiment 1-3 is the waste residue that ammonia-soda process soda ash is produced, and its concrete composition is shown in Table 2：
Table 2
| CaCO3 | CaO | Mg(OH)2 | CaCl2 | NaCl | CaSO4 | Fe2O3 | Al2O3 | SiO2 |
| 48.25 | 3.54 | 8～20 | 8～12 | 4～8 | 2～6 | 0.5～1.5 | 1～3 | 3～9 |
It is demonstrated experimentally that in waste residue calcium carbonate content in the range of 40wt%～60wt%, particularly 45wt%～
Arbitrary value in the range of 55wt% may be used to the present invention.
Comparative example 1：
(1) by dedusting ash and waste hydrochloric acid according to solid-to-liquid ratio 1g：The ratio mixing of 2mL, at 50 DEG C, be in stir speed (S.S.)
120r/min stirs 70min；
(2), (3) are with embodiment 1 (2), (3).
Precipitating reagent is the calcium oxide that purity is equal to 90%.
The utilization rate of iron is 65.21% in final dedusting ash and spent acid, zinc, nickel, the rate of recovery of cobalt be respectively 32.54%,
21.88%th, 15.24%.
Comparative example 2：
(1) with the step of embodiment 1 (1)；
(2) mass fraction that alkaline residue is made in the liquid obtained by alkaline residue is added in step (1) is 25%, stirs and controls
PH value reacts 50min 8, is separated by filtration, and obtains the first solid (solid containing ferroso-ferric oxide and carbon) and the first filtrate；
(3) with the step of embodiment 1 (3).
Precipitating reagent is the calcium oxide that purity is equal to 90%.
The utilization rate of iron is 32.1% in final dedusting ash and spent acid, zinc, nickel, the rate of recovery of cobalt be respectively 28.51%,
18.74%th, 13.52%.
Applicant states that the present invention illustrates the process of the present invention, but the present invention not office by above-described embodiment
It is limited to above-mentioned processing step, that is, does not mean that the present invention has to rely on above-mentioned processing step and could implement.Art
Technical staff it will be clearly understood that any improvement in the present invention, the equivalence replacement and auxiliary element to raw material selected by the present invention
Addition, selection of concrete mode etc., within the scope of all falling within protection scope of the present invention and disclosure.
Claims (6)
1. the method for comprehensive utilization of a kind of spent acid, alkaline residue and dedusting ash, is characterized in that comprising the steps：
(1) it is 1g by solid-to-liquid ratio by dedusting ash and waste hydrochloric acid：The ratio mixing of 4～8mL, at 40～80 DEG C 60～90min is stirred；
(2) mass fraction that alkaline residue is made in the liquid obtained by alkaline residue is added in step (1) is 80%～90%, stirs and controls
PH value processed reacts 40～60min 7.5～8.5, is separated by filtration, and obtains the first solid and the first filtrate；
(3) precipitating reagent is added in the first filtrate make precipitating reagent mass fraction be 2%～3%, stir 60～80min, mistake
Filter is separated, and obtains the second solid and the second filtrate, and the second filtrate Jing is concentrated by evaporation and obtains the 3rd solid.
2. method according to claim 1, it is characterised in that the dedusting ash is removing dust equipment in blast furnace ironmaking process
The dust of collection, iron content is in the range of 40wt%～60wt% and Zn content is in 1wt%～20wt% scopes in the dust
It is interior.
3. method according to claim 1, it is characterised in that the waste hydrochloric acid is that gained is useless after steel surface HCl treatment
Hydrochloric acid, in the range of 100～300g/L, nickel content is in the range of 2～5g/L for iron content in the waste hydrochloric acid.
4. the method according to right wants 1, it is characterised in that the alkaline residue is the waste residue that ammonia-soda process soda ash is produced, described
Calcium carbonate content is in the range of 40wt%～60wt% in waste residue.
5. method according to claim 4, is characterized in that calcium carbonate content is in 45wt%～55wt% models in the waste residue
In enclosing.
6. the method according to right wants 1, it is characterised in that the precipitating reagent be calcium oxide of the purity more than or equal to 90%,
One or more in high calcium powder of calcium hydroxide and calcium content of the purity more than or equal to 90% more than or equal to 8%.
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| CN108405552A (en) * | 2018-02-08 | 2018-08-17 | 兰州康顺石化有限责任公司 | Chemical industry acid sludge Neutralisation treatment method |
| CN108690914A (en) * | 2017-04-04 | 2018-10-23 | 马守栋 | A kind of method that acid-washing waste acid, sludge and copper smelting slag symbiosis Environmental-protection recycling utilize |
| CN113247959A (en) * | 2021-06-09 | 2021-08-13 | 东北大学 | Method for preparing functional iron oxide nanoparticles by using machine head ash as raw material |
| CN113293314A (en) * | 2021-05-31 | 2021-08-24 | 湘潭大学 | Method for leaching and separating bismuth from blast furnace gas ash or/and mud |
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| JPH11128875A (en) * | 1997-10-29 | 1999-05-18 | Mitsubishi Materials Corp | Treatment of incineration dust and ash |
| CN103274449A (en) * | 2013-06-18 | 2013-09-04 | 衡阳师范学院 | Method for rapidly removing arsenic in high arsenic zinc oxide through zinc ash and sodium carbonate peroxide in iron and steel plants and producing zinc sulfate |
| CN104313335A (en) * | 2014-09-23 | 2015-01-28 | 吉林市弗兰达科技股份有限公司 | Wet separation utilization method of ferroalloy manganese dust |
| CN105624430A (en) * | 2016-02-04 | 2016-06-01 | 马守栋 | Method for extracting nickel and cobalt from nickel laterite ore through caustic sludge and waste pickling liquid |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11128875A (en) * | 1997-10-29 | 1999-05-18 | Mitsubishi Materials Corp | Treatment of incineration dust and ash |
| CN103274449A (en) * | 2013-06-18 | 2013-09-04 | 衡阳师范学院 | Method for rapidly removing arsenic in high arsenic zinc oxide through zinc ash and sodium carbonate peroxide in iron and steel plants and producing zinc sulfate |
| CN104313335A (en) * | 2014-09-23 | 2015-01-28 | 吉林市弗兰达科技股份有限公司 | Wet separation utilization method of ferroalloy manganese dust |
| CN105624430A (en) * | 2016-02-04 | 2016-06-01 | 马守栋 | Method for extracting nickel and cobalt from nickel laterite ore through caustic sludge and waste pickling liquid |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108690914A (en) * | 2017-04-04 | 2018-10-23 | 马守栋 | A kind of method that acid-washing waste acid, sludge and copper smelting slag symbiosis Environmental-protection recycling utilize |
| CN107555462A (en) * | 2017-08-21 | 2018-01-09 | 赵阳臣 | A kind of method of calcined soda waste residue comprehensive reutilization |
| CN108405552A (en) * | 2018-02-08 | 2018-08-17 | 兰州康顺石化有限责任公司 | Chemical industry acid sludge Neutralisation treatment method |
| CN113293314A (en) * | 2021-05-31 | 2021-08-24 | 湘潭大学 | Method for leaching and separating bismuth from blast furnace gas ash or/and mud |
| CN113247959A (en) * | 2021-06-09 | 2021-08-13 | 东北大学 | Method for preparing functional iron oxide nanoparticles by using machine head ash as raw material |
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| CN106636653B (en) | 2018-04-20 |
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