CN104876191B - Method for treating waste ferrous sulphate by sulfide enriched concentrate-based acid making device - Google Patents
Method for treating waste ferrous sulphate by sulfide enriched concentrate-based acid making device Download PDFInfo
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- CN104876191B CN104876191B CN201410759974.8A CN201410759974A CN104876191B CN 104876191 B CN104876191 B CN 104876191B CN 201410759974 A CN201410759974 A CN 201410759974A CN 104876191 B CN104876191 B CN 104876191B
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- acid
- sulfur trioxide
- ferrous sulphate
- sulphuric acid
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Abstract
The invention discloses a method for treating waste ferrous sulphate by a sulfide enriched concentrate-based acid making device. The method comprises that ferrous sulphate and sulfide enriched concentrate are blended according to a volume ratio of 1: 14-16 to form a uniform mixture, the mixture is fed into a dryer, is dried and then is sieved, the sieved material are fed into a fluidized bed furnace and is roasted at a roasting temperature of 950 DEG C for 5-10s, sulfur dioxide produced by roasting undergoes a catalytic reaction to produce sulfur trioxide in a converter, and sulfur trioxide and water undergo a reaction to produce sulfuric acid. The method has the advantage that through the existing sulfide enriched concentrate-based acid making device, sulfide enriched concentrate and ferrous sulphate are blended according to a certain ratio and undergo a reaction to produce an acid and red slag as a by-product with iron content greater than or equal to 60% so that the waste ferrous sulphate is changed into valuables.
Description
Technical field
Present invention relates to Waste Sulfuric Acid ferrous iron processing method.
Technical background
Produce titanium dioxide meeting by-product solid waste ferrous sulfate, with the carrying out producing, the garbage sulphuric acid of by-product is sub-
Ferrum gets more and more, or even nowhere stacks, and pollutes ring.
How to solve the problems, such as the ferrous stacking of Waste Sulfuric Acid, turn waste into wealth, sulfuric acid plant is bold in innovation, using existing device,
Pyrite concentrate is attempted mix a certain proportion of ferrous sulfate antacid of burning.
Content of the invention
The purpose of the present invention is aiming at producing titanium dioxide meeting by-product solid waste ferrous sulfate at present, with produce
Carry out, the garbage ferrous sulfate of by-product gets more and more, or even nowhere stacks, the deficiency of pollution ring, and a kind of utilization is provided
Pyrite concentrate sulphuric acid plant processes the ferrous method of Waste Sulfuric Acid.
Process the ferrous method of Waste Sulfuric Acid using pyrite concentrate sulphuric acid plant it is characterised in that its method is：By ferrous sulfate
With pyrite concentrate with volume ratio 1:After the ratio mix homogeneously of 14-16, send into dehydrator and dried, the material after drying is screened
Afterwards, send into fluidized bed furnace be sent into row roasting, 950 DEG C of sintering temperature, the roasting time 5-10 second, roasting produce containing sulfur dioxide
It is catalyzed by transducer and generates sulfur trioxide, sulfur trioxide and water react generation sulphuric acid.
The high-temperature furnace gas producing, lowered the temperature through useless pot, cyclone dust extractor, electric cleaner and dry cleaning after, then through moving
Reeb, packed tower carry out wet cleaning, and the sulphuric acid of furnace gas and drying tower 93% is used as power by sulphur dioxide blower after being dried,
Catalytic converting through first, second and third section in converter, in furnace gas, about 95% Sulphur Dioxide becomes sulfur trioxide, by a suction tower
98% concentrated sulphuric acid absorbs, and remaining a small amount of sulfur dioxide is inhaled towers by two after the 4th section of twice transformation of inverted device again and absorbed, so
More than 99% sulfur dioxide is all converted, absorbs, absorb acid because absorb sulfur trioxide concentration raise, by be dried string acid and
Adding water in right amount, holding acid is dense stable, and redundance obtains finished product sulfuric acid by producing sour valve output.
It is an advantage of the invention that：Using existing pyrite concentrate sulphuric acid plant, pyrite concentrate is mixed a certain proportion of sulphuric acid of burning
Ferrous antacid, the red slag of by-product iron-holder >=60% simultaneously, thus reaching the effect becoming garbage ferrous sulfate into thing can be utilized,
Create higher economic benefit.Adjusted after mixing burning, ferrous sulfate per ton can produce acid and be：1×（1-10%）×7%÷35%
The acid of ÷ 0.95=0.19 ton, can produce 0.20 ton of the slag of iron content >=60%.The economic benefit producing：By 380 yuan/ton of acid, 330 yuan/ton
The calculation of price of slag, producible profit is：138.2 yuan/ton of ferrous sulfate.
Specific embodiment
By ferrous sulfate with pyrite concentrate with volume ratio 1:After the ratio mix homogeneously of 14-16, send into dehydrator and dried,
Material after drying after screening, is sent into fluidized bed furnace and is sent into row roasting, 950 DEG C of sintering temperature, roasting time 5-10 second, roasting
Burn being catalyzed by transducer containing sulfur dioxide of generation and generate sulfur trioxide, sulfur trioxide and water react generation sulphuric acid.Produce
High-temperature furnace gas, lowered the temperature through useless pot, cyclone dust extractor, electric cleaner and dry cleaning after, then carry out through dynamic wave, packed tower
Wet cleaning, the sulphuric acid of furnace gas and drying tower 93% is used as power by sulphur dioxide blower after being dried, through the in converter
First, two, three sections catalytic converting, in furnace gas, about 95% Sulphur Dioxide becomes sulfur trioxide, by one suction tower 98% concentrated sulphuric acid inhale
Receive, remaining a small amount of sulfur dioxide is inhaled towers by two after the 4th section of twice transformation of inverted device again and absorbed, such more than 99% titanium dioxide
Sulfur is all converted, absorbs, and absorbs acid and raises because absorbing sulfur trioxide concentration, by dense with dry string acid and the holding acid that adds water in right amount
Stable, redundance obtains finished product sulfuric acid by producing sour valve output.
Points for attention：
1st, because ferrous sulfate contains water of crystallization, easily it is bonded on the flight of dehydrator during drying, carry out will noting when drying operation
Meaning checks the situation of flight in dehydrator, if need to clear up Drying in time when bonding is serious.
2nd, in producing as a trial, the change of each temperature measuring point in fluidized bed furnace to be examined, daily from 207 points and 209 points
Arrange cold ash once, such as find there is the cold ash of a large amount of bulky grains it is necessary to reduce ferrous sulfate mixed-fuel burning proportion rapidly, and continuously arranged cold
Ash, until it is normal to discharge material particles.
3rd, per hour hopper and feed opening are checked, and hopper is clashed into once, to feed opening stacking material
Cleaning once, prevents solid accumulation.
4th, during mixing burning, need to change and just can change after technological operation ticket it is necessary to be assigned by production department during technological operation index
Become, must not privately change technic index.
5th, during examination is burnt, all ferrous sulfate and pyrite concentrate must car car weigh, and carry out sulfur-bearing and water analysiss, transhipment
The expense that material increases counts production cost.
6th, the flow process examination of a week, the collection of completing technology index and production cost after entering normal production, are done.
7th, after one week examination sintering bundle, if inspection system is normal, can progressively adjust and mix burning volume ratio to 1:10（Mass ratio is about
6%）, and check fluidized bed furnace ruuning situation by above-mentioned steps, then produce one week as a trial.By that analogy, can gradually mixed-fuel burning proportion be increased
To mass ratio about 10%.
Claims (1)
1. process the ferrous method of Waste Sulfuric Acid it is characterised in that its method is using pyrite concentrate sulphuric acid plant：By ferrous sulfate with
Pyrite concentrate is with volume ratio 1:After the ratio mix homogeneously of 14-16, send into dehydrator and dried, the material after drying is screened
Afterwards, send into fluidized bed furnace and carry out roasting, 950 DEG C of sintering temperature, roasting time 5-10 second, what roasting produced leads to containing sulfur dioxide
Cross transducer catalysis and generate sulfur trioxide, sulfur trioxide and water react generation sulphuric acid；The high-temperature furnace gas producing, through useless pot, whirlwind
Cleaner unit, electric cleaner lowered the temperature and dry cleaning after, then carry out wet cleaning through dynamic wave, packed tower, furnace gas is again through dry
The sulphuric acid of dry tower 93% is used as power by sulphur dioxide blower, through first, second and third section of catalytic converting, stove in converter after being dried
In gas, about 95% Sulphur Dioxide becomes sulfur trioxide, is absorbed by the concentrated sulphuric acid of a suction tower 98%, and remaining a small amount of sulfur dioxide is again
Inhale tower by two after the 4th section of twice transformation of inverted device to absorb, such more than 99% sulfur dioxide is all converted, absorbs, and absorbs
Acid raises because absorbing sulfur trioxide concentration, and by string acid being dried and adding water that holding acid is dense stable in right amount, redundance is by producing sour valve
Output obtains finished product sulfuric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410759974.8A CN104876191B (en) | 2014-12-12 | 2014-12-12 | Method for treating waste ferrous sulphate by sulfide enriched concentrate-based acid making device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410759974.8A CN104876191B (en) | 2014-12-12 | 2014-12-12 | Method for treating waste ferrous sulphate by sulfide enriched concentrate-based acid making device |
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| CN104876191A CN104876191A (en) | 2015-09-02 |
| CN104876191B true CN104876191B (en) | 2017-02-22 |
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| CN105417502A (en) * | 2015-12-30 | 2016-03-23 | 攀枝花东方钛业有限公司 | Method for preparing acid through high-proportion co-combustion ferrous sulfate |
| CN106904658A (en) * | 2017-02-20 | 2017-06-30 | 四川龙蟒钛业股份有限公司 | A kind of method of acid content in reduction ferrous slag |
| CN107254586B (en) * | 2017-06-20 | 2019-05-14 | 西部矿业股份有限公司 | A kind of processing method of oxygen leaching mine tailings |
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| SU644724A1 (en) * | 1975-04-17 | 1979-01-30 | Предприятие П/Я В-8830 | Method of obtaining sulphur dioxide |
| CN102344124B (en) * | 2011-07-12 | 2012-10-17 | 湖南恒光科技股份有限公司 | Process for co-producing sulfuric acid, fine iron powder and iron oxide red by ferrous sulfate heptahydrate and pyrite |
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