CN102344169B - Method for producing iron-enriched ore by using ferrous sulfate heptahydrate - Google Patents
Method for producing iron-enriched ore by using ferrous sulfate heptahydrate Download PDFInfo
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- CN102344169B CN102344169B CN 201110176965 CN201110176965A CN102344169B CN 102344169 B CN102344169 B CN 102344169B CN 201110176965 CN201110176965 CN 201110176965 CN 201110176965 A CN201110176965 A CN 201110176965A CN 102344169 B CN102344169 B CN 102344169B
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Abstract
The invention discloses a method for producing iron-enriched ore by using ferrous sulfate heptahydrate. The method comprises steps of: (1) a metathetical reaction step, wherein calcium salt is added to a ferrous sulfate heptahydrate solution for carrying out a metathetical reaction, a reaction product is filtered, a filter residue gypsum is recovered, and a filtrate is preserved for later use; (2) a calcium salt recycling step, wherein lime is added to the filtrate obtained in the step (1) for carrying out a reaction for 0.5 to 4 hours, a reaction product is filtered, a filtrate calcium salt solution is reused in the step (1), an a filter residue ferrous hydroxide is preserved for later use; (3) an iron-enriched ore producing step, wherein the filter residue ferrous hydroxide obtained in the step (2) is briquetted, dried, and baked for 2 to 8 hours under a temperature of 600 to 800 DEG C, such that the iron-enriched ore is obtained. According to the invention, a titanium pigment by-product is used for producing commercial-grade high-purity gypsum and iron-enriched ore, such that comprehensive utilization of resources is realized.
Description
Technical field
The invention belongs to titanium dioxide byproduct for treatment field, especially a kind of method of utilizing iron vitriol to produce rich iron ore.
Background technology
Titanium dioxide is a kind of high-grade white pigment, along with economic development, the demand of titanium dioxide is increased day by day.At present, China mainly adopts Titanium White Production By Sulfuric Acid Process, and 1 ton of titanium dioxide of every production approximately produces 4 tons of iron vitriol byproducts, its output very huge (annual approximately millions of tons).If adopt the stacking mode, required place scale requires greatly, and ferrous sulfate is soluble in water, flows into the water source after dissolving environment is impacted, and has wasted simultaneously ready-made iron resources.Although, also there is the small part iron vitriol to be used for agricultural chemicals, fertilizer, feed, water treatment etc., still have very major part not yet to find so far and rationally effectively utilize approach.Therefore, how processing these byproducts becomes titanium dioxide industry problem demanding prompt solution, has seriously restricted the development of related industries.
Summary of the invention
The technical problem to be solved in the present invention is to provide that a kind of technique is simple, with low cost, the iron vitriol that utilizes of the renewable circulation of intermediates is produced the method for rich iron ore, to take full advantage of the titanium dioxide byproduct, not only reduce the solid waste pollution environment but also increased its added value, realized extensive efficient utilization of scrap iron resource.
Adopt following technical scheme for solving the problems of the technologies described above the present invention: utilize iron vitriol to produce the method for rich iron ore, the method comprises the following steps:
＜1〉replacement(metathesis)reaction adds calcium salt to carry out replacement(metathesis)reaction in iron vitriol solution, and filtration after reaction is completed is reclaimed the filter residue gypsum, filtrate for later use;
＜2〉reclaim calcium salt in step＜1〉filtrate in add lime reaction 0.5～4h, filtration after reaction is completed, the filtrate calcium salt soln returns to step＜1〉recycle, the filter residue ferrous hydroxide is standby;
＜3〉the preparation rich iron ore is with step＜2〉the filter residue ferrous hydroxide dry through briquetting, in 600～800 ℃ of roastings 2～8 hours, namely get rich iron ore.
Step＜1〉the calcium salt quality be equivalent to 1.4～5 times of ferro element quality in iron vitriol solution.
Step＜1〉calcium salt be calcium chloride or calcium dithionate.
Step＜2〉lime adding amount reach 7.5～9.5 with pH and be limited.
Step＜1〉and step＜2 reaction carry out in the acid resistance reactive tank.
The present invention utilizes the byproduct iron vitriol of producing titanium dioxide, through replacement(metathesis)reaction, reclaim calcium salt, three steps of preparation rich iron ore, produces commercial grade high purity plaster and rich iron ore, solves the market outlet problem of the byproduct of titanium white production producer.The method reaction is simple, low, the renewable circulation of calcium salt of input, has both taken full advantage of the titanium dioxide byproduct, has reduced again the solid waste pollution environment, has increased its added value, has realized the comprehensive reasonable utilization of resource.
Embodiment
Embodiment 1
＜1〉replacement(metathesis)reaction is through certain concentrated titanium powder plant iron vitriol solution iron content 180g/L, get 1000mL and be placed in the 2000mL beaker, add calcium chloride 500 grams to carry out replacement(metathesis)reaction in iron vitriol solution, stir a moment with agitator, filtration after reaction is completed, reclaim filter residue gypsum (dry weight 552.5 grams), filtrate for later use;
＜2〉reclaim calcium salt in step＜1〉filtrate in to add lime to pH value of solution be 8, reaction 4h, filtration after reaction is completed, the filtrate calcium salt soln returns to step＜1〉recycle, the filter residue ferrous hydroxide is standby;
＜3〉the preparation rich iron ore is with step＜2〉the filter residue ferrous hydroxide dry through briquetting, in 670 ℃ of roastings 2 hours, namely get rich iron ore (257 gram iron content 68.8%).
Above-mentioned relevant reaction principle is as follows:
FeSO
4·7H
2O+CaCl
2——FeCl
2+CaSO
4·2H
2O↓+5H
2O
FeCl
2+Ca(HO)
2——Fe(HO)
2↓+CaCl
2
4Fe(HO)
2+O
2——2Fe
2O
3+4H
2O
Embodiment 2
＜1〉replacement(metathesis)reaction is through certain concentrated titanium powder plant iron vitriol solution iron content 183g/L, get 1000mL and be placed in the 2000mL beaker, add calcium chloride 470 grams to carry out replacement(metathesis)reaction in iron vitriol solution, stir a moment with agitator, filtration after reaction is completed, reclaim filter residue gypsum (dry weight 550.2 grams), filtrate for later use;
＜2〉reclaim calcium salt in step＜1〉filtrate in to add lime to pH value of solution be 9.5, reaction 2.5h, filtration after reaction is completed, the filtrate calcium salt soln returns to step＜1〉recycle, the filter residue ferrous hydroxide is standby;
＜3〉the preparation rich iron ore is with step＜2〉the filter residue ferrous hydroxide dry through briquetting, in 800 ℃ of roastings 3 hours, namely get rich iron ore (266.5 gram iron content 66.5%).
Embodiment 3
＜1〉replacement(metathesis)reaction is through certain concentrated titanium powder plant iron vitriol solution iron content 186g/L, get 1000mL and be placed in the 2000mL beaker, add calcium dithionate 900 grams to carry out replacement(metathesis)reaction in iron vitriol solution, stir a moment with agitator, filtration after reaction is completed, reclaim filter residue gypsum (dry weight 560.8 grams), filtrate for later use;
＜2〉reclaim calcium salt in step＜1〉filtrate in to add lime to pH value of solution be 7.5, reaction 0.5h, filtration after reaction is completed, the filtrate calcium salt soln returns to step＜1〉recycle, the filter residue ferrous hydroxide is standby;
＜3〉the preparation rich iron ore is with step＜2〉the filter residue ferrous hydroxide dry through briquetting, in 600 ℃ of roastings 8 hours, namely get rich iron ore (260 gram iron content 68%).
Claims (1)
1. method of utilizing iron vitriol to produce rich iron ore is characterized in that the method comprises the following steps:
＜1〉replacement(metathesis)reaction
Add calcium salt to carry out replacement(metathesis)reaction in iron vitriol solution, filtration after reaction is completed is reclaimed the filter residue gypsum, filtrate for later use;
＜2〉reclaim calcium salt
In step＜1〉filtrate in add lime reaction 0.5～4h, the reaction complete after filtration, the filtrate calcium salt soln returns to step＜1〉recycle, the filter residue ferrous hydroxide is standby;
＜3〉preparation rich iron ore
With step＜2〉the filter residue ferrous hydroxide dry through briquetting, in 600～800 ℃ of roastings 2～8 hours, namely get rich iron ore;
Described step＜1〉the calcium salt quality be equivalent to 1.4～5 times of ferro element quality in iron vitriol solution; Described step＜1〉calcium salt be calcium chloride or calcium dithionate; Described step＜2〉lime adding amount reach 7.5～9.5 with pH and be limited; Described step＜1〉and step＜2 reaction carry out in the acid resistance reactive tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110176965 CN102344169B (en) | 2011-06-28 | 2011-06-28 | Method for producing iron-enriched ore by using ferrous sulfate heptahydrate |
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| CN 201110176965 CN102344169B (en) | 2011-06-28 | 2011-06-28 | Method for producing iron-enriched ore by using ferrous sulfate heptahydrate |
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| CN102344169A CN102344169A (en) | 2012-02-08 |
| CN102344169B true CN102344169B (en) | 2013-06-19 |
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| CN112390295A (en) * | 2020-10-30 | 2021-02-23 | 龙蟒佰利联集团股份有限公司 | Method for utilizing artificial rutile mother liquor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1482069A (en) * | 2002-09-14 | 2004-03-17 | 熊育丰 | Process for preparing Fe hydroxide and oxide |
| CN101607741A (en) * | 2008-06-19 | 2009-12-23 | 张晓东 | Utilize byproduct ferrous sulfate of titanium dioxide to prepare the method for red iron oxide |
| CN102020319A (en) * | 2011-01-07 | 2011-04-20 | 铜陵端莱科技有限公司 | Method for preparing iron oxide black pigment by utilizing titanium dioxide waste acid ferrous sulphate |
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2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1482069A (en) * | 2002-09-14 | 2004-03-17 | 熊育丰 | Process for preparing Fe hydroxide and oxide |
| CN101607741A (en) * | 2008-06-19 | 2009-12-23 | 张晓东 | Utilize byproduct ferrous sulfate of titanium dioxide to prepare the method for red iron oxide |
| CN102020319A (en) * | 2011-01-07 | 2011-04-20 | 铜陵端莱科技有限公司 | Method for preparing iron oxide black pigment by utilizing titanium dioxide waste acid ferrous sulphate |
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