CN108264168A - A kind of method using slag processing titanium white waste acid - Google Patents
A kind of method using slag processing titanium white waste acid Download PDFInfo
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- CN108264168A CN108264168A CN201810288264.XA CN201810288264A CN108264168A CN 108264168 A CN108264168 A CN 108264168A CN 201810288264 A CN201810288264 A CN 201810288264A CN 108264168 A CN108264168 A CN 108264168A
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- slag
- titanium white
- waste acid
- white waste
- reaction
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A kind of method using slag processing titanium white waste acid, slag is added in titanium white waste acid, reaction is stirred in closed reactor, 10~120min of reaction time, 20~90 DEG C of reaction temperature, when until the pH value of the mixed material of slag and titanium white waste acid is 6~8, stops reaction and staticly settle, obtain solid phase and liquid phase.The method of the present invention solves technology and the difficult problem of environmental protection that titanium white waste acid inexpensive cannot on a large scale dissolve, and social benefit is very notable, has good promotion prospect.
Description
Technical field
The invention belongs to environmental protection and chemical fields, specifically design a kind of method using slag processing titanium white waste acid.
Background technology
Panzhihua is known as " Chinese vanadium titanium all ", 33.4 ten thousand tons of Panzhihua sulfuric acid method titanium pigment production capacity in 2016, production
Metatitanic acid hydrolysis will generate 8~10 tons of spent acid during one ton of titanium dioxide, wherein 25~35% Returning process reuse, it is practical to arrange
The spent acid put is 6~6.5 tons；According to statistics, by current titanium dioxide Production rate, spent acid total emission volumn is up to 1,800,000 tons；Now,
Generally using calcium oxide neutralisation, spent acid caused by one ton of titanium dioxide of neutralization needs 3~3.5 tons of oxidations of consumption for spent acid processing
Calcium generates 8 tons of wet slag；According to by 300,000 tons of titanium dioxides calculations are produced per year, 2,400,000 tons of waste residue is generated, this will consume million tons of calcium oxide；
And the price of one ton of calcium oxide, at 160 yuan or so, this expense is exactly 1.6 hundred million yuan；How the extensive consumption titanium white of low cost gives up
Acid has become a technical barrier of sulfuric acid method titanium pigment industry, if cannot effectively solve, sulfate process titanium dioxide industry would become hard to
It develops in a healthy way；Therefore, now it is badly in need of a kind of methods of a large amount of processing titanium white waste acids of energy low cost.
Slag is the waste residue generated in metallurgical industry steelmaking process, and generation rate is 8~15%, 2012 years of crude steel yield
About 1.8 hundred million tons of whole world row's slag amount；The slag yield of China is incremented by rapidly with the fast development of steel and iron industry, because
This, the processing of iron and steel enterprise's waste residue and recycling problem are also increasingly taken seriously.
Invention content
The object of the present invention is to provide a kind of methods using slag processing titanium white waste acid, and by neutralization reaction, control is anti-
The ingredient and acid-base value of material are answered, the technical barrier of extensive consumption titanium white waste acid is solved based on lower cost.
The present invention method be：
Slag is added in titanium white waste acid, is stirred reaction in closed reactor, 10~120min of reaction time,
20~90 DEG C of reaction temperature when the pH value of slag and the mixed material of titanium white waste acid is 6~8, stops reaction and staticly settles, obtain
Obtain solid phase and liquid phase.
In the above method, such as the pH value of slag and the mixed material of titanium white waste acid>8, then continue to add in into mixed material
Slag, repetition is above-mentioned to be stirred to react, until the pH value of whole materials is 6~8 after reaction.
The above method obtain solid phase detached with liquid filtration, after solid phase washing and drying as waste residue transport to cinder field discarding or
It recycles, liquid phase is as titanium white factory industrial water.
Calcium oxide is by mass percentage 30~50% in above-mentioned slag, 60~320 mesh of granularity.
The mass percent of sulfuric acid is 18~22%, Fe in above-mentioned titanium white waste acid2+And Fe3+Concentration 15~50g/L, Mg2+
Concentration 1~7g/L, Al3+Concentration 0.5~3.0g/L, Mn2+Concentration 1~6g/L, Sc3+1~40ppm of concentration.
The method of the present invention has the beneficial effect that：The essential mineral composition of slag is tricalcium silicate, dicalcium silicate, calcium and magnesium olive
Stone, calcium and magnesium rhodonite, dicalcium ferrite etc.；Wherein calcium oxide content 30~50%, therefore using slag neutralisation treatment titanium white
Spent acid realizes the extensive consumption of low cost of titanium white waste acid；It is of low cost with the method processing titanium white waste acid of the present invention, and raw material
Slag is reluctant trade waste；Impurity enters slag phase in titanium white waste acid after neutralization reaction, can directly transport cinder field to and lose
It abandons or recycles；Meanwhile obtained liquid can direct emission or recycling as industrial water；The method of the present invention solves titanium white
The technology and the difficult problem of environmental protection that spent acid inexpensive cannot on a large scale dissolve, social benefit is very notable, has good promotion prospect.
Specific embodiment
In the embodiment of the present invention, when slag is added in into titanium white waste acid, each additional proportion is titanium white waste acid in mass ratio:
Slag=10:(1~3).
In the embodiment of the present invention, time of repose is 8~10 minutes after stopping reaction.
Calcium content in slag is scaled to the mass percent of calcium oxide formation calcium oxide in the embodiment of the present invention.
The solid phase precipitation ingredient that the method for the present invention obtains further includes metal oxygen based on gypsum (hydrated calcium sulfate)
Compound is neutral after water washing, can both store up processing, recycling and the profit of valuable constituent element can also be carried out by other technologies
With.
The liquid phase index that the method for the present invention obtains meets《Integrated wastewater discharge standard》It (GB8978-1996), can be direct
Discharge；Index meets water supply standard (conductivity≤10 the μ S/cm, SiO of Titanium White Production By Sulfuric Acid Process technique simultaneously2≤0.5mg/
L, pH value (25 DEG C) >=7~8, Cl-≤ 0.1mg/L) therefore can be back to use in production process of titanium pigment, realize the cycle profit of water
With.
With reference to embodiment, the invention will be further described, but does not therefore limit the present invention to the reality
It applies among a range.
Fe in titanium white waste acid in the embodiment of the present invention2+And Fe3+Concentration 15~50g/L, Mg2+Concentration 1~7g/L, Al3+Concentration
0.5~3.0g/L, Mn2+Concentration 1~6g/L, Sc3+1~40ppm of concentration.
Embodiment 1
The 20% titanium white waste acid 100g of mass percent of sulfuric acid is placed in closed reactor, adds in slag 11.43g for the first time,
Calcium oxide mass percent is 50% in the slag, 60 mesh of granularity；After 60 DEG C are stirred to react 30 minutes, mixing is measured at this time
The pH value of material is 4.3；High slag 11.43g is added in again, and 60 DEG C are stirred to react 30 minutes, measure the pH of mixed material at this time
Be worth is 7.7；Stop reaction and stand 10 minutes precipitations completely, be separated by filtration solid phase and liquid phase；Liquid phase direct emission or return are used as
Industrial water is lost after solid phase precipitation object washing and drying toward cinder field.
Embodiment 2
The 18% titanium white waste acid 120g of mass percent of sulfuric acid is placed in closed reactor, adds in slag 30.86g, it is described
Slag in calcium oxide mass percent be 40%, 200 mesh of granularity；After 30 DEG C are stirred to react 120 minutes, measured value pH value at this time
It is 7.9；Stop reaction and stand 8 minutes precipitations completely, be separated by filtration solid phase and liquid phase；Liquid phase direct emission is returned as industry
With water, lost after solid phase precipitation object washing and drying toward cinder field.
Embodiment 3
The mass percentage concentration of sulfuric acid is placed in closed reactor for 22% titanium white waste acid 90g, adds in slag 11g, it is described
Slag in calcium oxide mass percent be 35%, 200 mesh of granularity；90 DEG C are stirred to react after twenty minutes, measure mixture at this time
The pH value of material is 2.3；Slag 12.33g is added in again, and 90 DEG C are stirred to react 20 minutes, and the pH value for measuring mixed material at this time is
4.7；Third time adds in slag 9.03g, and 90 DEG C are stirred to react 20 minutes, and it is 7.6 to measure pH value at this time；Stop reaction and stand 8 points
Clock precipitation is complete, is separated by filtration solid phase and liquid phase；Liquid phase direct emission is returned as industrial water, and the washing of solid phase precipitation object is dried
It is lost after dry toward cinder field.
Embodiment 4
The mass percentage concentration of sulfuric acid is placed in closed reactor for 22% titanium white waste acid 100g, adds in slag for the first time
27.93, calcium oxide mass percent is 45% in the slag, 120 mesh of granularity；60 DEG C are stirred to react after sixty minutes, at this time
It is 6.9 to measure pH；Stop reaction and stand 10 minutes precipitations completely, be separated by filtration solid phase and liquid phase；Liquid phase direct emission or return
As industrial water, lost after solid phase precipitation object washing and drying toward cinder field.
Claims (5)
- A kind of 1. method using slag processing titanium white waste acid, it is characterised in that：Slag is added in titanium white waste acid, closed It is stirred reaction in reactor, 10~120min of reaction time, 20~90 DEG C of reaction temperature is mixed when slag and titanium white waste acid When the pH value for closing material is 6~8, stops reaction and staticly settle, obtain solid phase and liquid phase.
- 2. a kind of method using slag processing titanium white waste acid according to claim 1, it is characterised in that：Such as slag and titanium The pH value of the mixed material of white spent acid>8, then continue to add in slag into mixed material, repetition is above-mentioned to be stirred to react, until anti- The pH value of whole materials is 6~8 after answering.
- A kind of 3. method using slag processing titanium white waste acid according to claim 1, it is characterised in that the solid phase of acquisition It is detached with liquid filtration, transporting cinder field to as waste residue after solid phase washing and drying abandons or recycle, and liquid phase is as titanium white factory work Industry water.
- A kind of 4. method using slag processing titanium white waste acid according to claim 1, it is characterised in that the slag Middle calcium oxide is by mass percentage 30~50%, 60~320 mesh of granularity.
- A kind of 5. method using slag processing titanium white waste acid according to claim 1, it is characterised in that the titanium white The mass percent of sulfuric acid is 18~22%, Fe in spent acid2+And Fe3+Concentration 15~50g/L, Mg2+Concentration 1~7g/L, Al3+It is dense Spend 0.5~3.0g/L, Mn2+Concentration 1~6g/L, Sc3+1~40ppm of concentration.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810288264.XA CN108264168A (en) | 2018-04-03 | 2018-04-03 | A kind of method using slag processing titanium white waste acid |
| CN201811072843.7A CN109748371A (en) | 2018-04-03 | 2018-09-14 | A method of utilizing slag processing titanium white waste acid |
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| CN201810288264.XA CN108264168A (en) | 2018-04-03 | 2018-04-03 | A kind of method using slag processing titanium white waste acid |
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| CN108264168A true CN108264168A (en) | 2018-07-10 |
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| CN201811072843.7A Pending CN109748371A (en) | 2018-04-03 | 2018-09-14 | A method of utilizing slag processing titanium white waste acid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109626625A (en) * | 2018-11-16 | 2019-04-16 | 浙江航峰铁塔有限公司 | The treatment process of hot galvanizing acid pickle |
| CN111424172A (en) * | 2020-06-01 | 2020-07-17 | 中国恩菲工程技术有限公司 | Wet treatment process of laterite-nickel ore |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112390405A (en) * | 2019-08-14 | 2021-02-23 | 宁波太极环保设备有限公司 | Titanium white wastewater treatment method |
| CN112441674A (en) * | 2019-08-29 | 2021-03-05 | 宁波太极环保设备有限公司 | Titanium white wastewater treatment equipment and method |
| CN111348670A (en) * | 2020-03-13 | 2020-06-30 | 江苏一夫科技股份有限公司 | Method for preparing titanium gypsum from titanium white waste acid |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07178394A (en) * | 1993-12-24 | 1995-07-18 | Kawasaki Steel Corp | Treatment of spent acid |
| BRPI0703223A (en) * | 2007-03-12 | 2008-10-28 | Torres Antonio Carvalho | treatment of acidic waste using steel slag |
| CN101962239B (en) * | 2010-09-20 | 2012-01-04 | 湖南永利化工股份有限公司 | Method for purifying titanium white wastewater |
| CN102259969B (en) * | 2011-06-28 | 2013-10-09 | 攀枝花市尚亿科技有限责任公司 | Method for neutralizing titanium dioxide waste acid/wastewater by using yellow phosphorus slag |
-
2018
- 2018-04-03 CN CN201810288264.XA patent/CN108264168A/en active Pending
- 2018-09-14 CN CN201811072843.7A patent/CN109748371A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109626625A (en) * | 2018-11-16 | 2019-04-16 | 浙江航峰铁塔有限公司 | The treatment process of hot galvanizing acid pickle |
| CN109626625B (en) * | 2018-11-16 | 2021-08-13 | 浙江航峰铁塔有限公司 | Treatment process of hot galvanizing waste acid liquid |
| CN111424172A (en) * | 2020-06-01 | 2020-07-17 | 中国恩菲工程技术有限公司 | Wet treatment process of laterite-nickel ore |
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| CN109748371A (en) | 2019-05-14 |
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Application publication date: 20180710 |