CN104512939A - Method for purifying ferrous sulfate by by-product of titanium dioxide - Google Patents
Method for purifying ferrous sulfate by by-product of titanium dioxide Download PDFInfo
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- CN104512939A CN104512939A CN201310461949.7A CN201310461949A CN104512939A CN 104512939 A CN104512939 A CN 104512939A CN 201310461949 A CN201310461949 A CN 201310461949A CN 104512939 A CN104512939 A CN 104512939A
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- ferrous sulfate
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Abstract
The invention provides a method for purifying ferrous sulfate by a by-product of titanium dioxide. The method includes following steps: (1) adding iron sheets to the by-product of titanium dioxide to performing a temperature-increasing reaction at 90-95 DEG C and stopping the reaction when the pH value is 4-5 and the concentration of the ferrous sulfate reaches 40-50 g/100ml to obtain a solution; (2) adding PAC (poly-aluminum chloride) according to a mass ratio of 3-5% to the solution with fully stirring and removing generated colloid-like impurities through a plate-and-frame pressure filter; and (3) performing a natural precipitating process for 12-14h to obtain the ferrous sulfate which is relatively pure. In the method, a high-purity ferrous solution is obtained through addition of the iron sheets for removing acid, addition of the chemical flocculant (PAC) for removing the impurities and combination usage of plate-and-frame pressure filtration and secondary precipitation. The method provides a raw material for producing high-purity a ferric oxide pigment further.
Description
Technical field
The present invention relates to the process of trade waste, particularly relate to a kind of method utilizing titanium dioxide byproduct purification ferrous sulfate.
Background technology
The byproduct of titanium white production contains a large amount of ferrous sulfate, and the production of ferric oxide serial pigment, just be as raw material, ferrous sulfate is a kind of byproduct in titanium powder plant production process, amount is very large, and a lot of titanium powder plant is very headache in this problem of process ferrous sulfate, even if ferrous sulfate is in water treatment industry, agricultural, pharmaceutically all play a very important role, but because amount is too large, so process ferrous sulfate is always pretty troublesome.The way of general titanium powder plant process ferrous sulfate utilizes ilmenite to produce titanium white.Although because the ferrous sulfate content of titanium dioxide is more than 70%, but because in the process of producing titanium white, the impurity such as a large amount of impurity such as Ca, Mg, Al, Si are contained in the inside, this just relates to the problem of outlet of these a large amount of ferrous sulfate, badly can cause very large injury to environment if processed.Although also handlebar titanium dioxide byproduct is used for iron catalyst, water purification agent, fodder additives in the past, soil improvement agent, the aspects such as chromium slag reduction agent, but it is little to process useless secondary material ferrous sulfate quantity, but, for ferrous sulfate of how purifying out from the byproduct of titanium white production, technique is still immature, and this will directly have influence on the quality of product, therefore, explore a kind of novel method of ferrous sulfate of purifying, extremely important.
Summary of the invention
The object of this invention is to provide a kind of technique simple, be convenient to the method utilizing titanium dioxide byproduct purification ferrous sulfate that controls, refining effect is good.
For realizing above-mentioned goal of the invention, technical scheme of the present invention is as follows:
Comprise the steps:
1, get titanium dioxide byproduct, add iron sheet and carry out temperature reaction, be warming up to 90-95 degree, when pH reaches 4-5, when ferrous sulfate concentration reaches 40g-50g/100ml, stopped reaction;
This step is to be removed further by the sulfuric acid produced because of reasons such as transports in by-product of white titanium pigment.
2, chemical subtraction: step 1 is obtained solution, according to mass ratio 3-5%, adds PAC (polymerize aluminum chloride), fully stirs, then is removed the colloidal impurity produced by plate-and-frame filter press;
3, secondary natural sedimentation removal of impurities: through the process of step 2, eliminate a large amount of ionic impurity existed, but wherein also there are some impurity such as soil, other a small amount of ions etc. unavoidably, now in order to reach the high purity of ferrous sulfate, must secondary natural sedimentation be carried out, through the natural sedimentation of 12h-14h, can see that a small amount of colloidal impurity appears in the bottom of reactor, at this moment by the impurity of discharge Polycondensation Reactor and Esterification Reactor, relatively pure ferrous sulfate can be left.
The invention has the beneficial effects as follows: this treatment process, adopt and first add iron sheet deacidification, then add chemical floc removal of impurities, by Plate Filtration, secondary sedimentation conbined usage, obtaining highly purified ferrous iron solution, technique advantages of simple, getting ready for producing highly purified iron oxide pigment further.
Embodiment
Be described principle of the present invention and feature below, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1
1, get titanium dioxide byproduct, add iron sheet and carry out temperature reaction, be warming up to 90-95 degree, when pH reaches 4-5, when ferrous sulfate concentration reaches 40g-50g/100ml, stopped reaction;
This step is to be removed further by the sulfuric acid produced because of reasons such as transports in by-product of white titanium pigment.
2, chemical subtraction: step 1 is obtained solution, according to mass ratio 3-5%, adds PAC (polymerize aluminum chloride), fully stirs, then is removed the colloidal impurity produced by plate-and-frame filter press;
3, secondary natural sedimentation removal of impurities: through the process of step 2, eliminate a large amount of ionic impurity existed, but wherein also there are some impurity such as soil, other a small amount of ions etc. unavoidably, now in order to reach the high purity of ferrous sulfate, must secondary natural sedimentation be carried out, through the natural sedimentation of 12h-14h, can see that a small amount of colloidal impurity appears in the bottom of reactor, at this moment by the impurity of discharge Polycondensation Reactor and Esterification Reactor, relatively pure ferrous sulfate can be left.
The foregoing is only preferred embodiment of the present invention, be not limited to the present invention, within the spirit and principles in the present invention all, any amendment made and equivalent replacement, all should be included within protection scope of the present invention.
Claims (1)
1. utilize a method for titanium dioxide byproduct purification ferrous sulfate, it is characterized in that: comprise the steps:
1) get titanium dioxide byproduct, add iron sheet and carry out temperature reaction, be warming up to 90-95 degree, when pH reaches 4-5, when ferrous sulfate concentration reaches 40g-50g/100ml, stopped reaction;
2) chemical subtraction: step 1 is obtained solution, according to mass ratio 3-5%, adds PAC (polymerize aluminum chloride), fully stirs, then is removed the colloidal impurity produced by plate-and-frame filter press;
3) secondary natural sedimentation removal of impurities: secondary natural sedimentation 12h-14h, there is a small amount of colloidal impurity in the bottom of reactor, discharges impurity, can obtain relatively pure ferrous sulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310461949.7A CN104512939A (en) | 2013-09-28 | 2013-09-28 | Method for purifying ferrous sulfate by by-product of titanium dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310461949.7A CN104512939A (en) | 2013-09-28 | 2013-09-28 | Method for purifying ferrous sulfate by by-product of titanium dioxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104512939A true CN104512939A (en) | 2015-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310461949.7A Pending CN104512939A (en) | 2013-09-28 | 2013-09-28 | Method for purifying ferrous sulfate by by-product of titanium dioxide |
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| CN (1) | CN104512939A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107857304A (en) * | 2017-11-15 | 2018-03-30 | 成都先进金属材料产业技术研究院有限公司 | The method of purification of saltouing of byproduct ferrous sulfate of titanium dioxide |
| CN112357967A (en) * | 2020-11-18 | 2021-02-12 | 山东鑫动能锂电科技有限公司 | Process for purifying high-purity ferrous sulfate as titanium dioxide byproduct |
-
2013
- 2013-09-28 CN CN201310461949.7A patent/CN104512939A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107857304A (en) * | 2017-11-15 | 2018-03-30 | 成都先进金属材料产业技术研究院有限公司 | The method of purification of saltouing of byproduct ferrous sulfate of titanium dioxide |
| CN112357967A (en) * | 2020-11-18 | 2021-02-12 | 山东鑫动能锂电科技有限公司 | Process for purifying high-purity ferrous sulfate as titanium dioxide byproduct |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150415 |
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| WD01 | Invention patent application deemed withdrawn after publication |