CN103952715A - Chlorination furnace slag washing treatment method and use of treatment liquid - Google Patents
Chlorination furnace slag washing treatment method and use of treatment liquid Download PDFInfo
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- CN103952715A CN103952715A CN201410109252.8A CN201410109252A CN103952715A CN 103952715 A CN103952715 A CN 103952715A CN 201410109252 A CN201410109252 A CN 201410109252A CN 103952715 A CN103952715 A CN 103952715A
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- furnace slag
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Abstract
The invention relates to a chlorination furnace slag washing treatment method and a use of a treatment liquid. The chlorination furnace slag washing treatment method comprises that chloride ions in chlorination furnace slag are dissolved into water by water washing so that the chloride ions are removed. The use of the chlorination furnace slag washing treatment liquid comprises the following steps of 1, separating precipitates of Ca<2+>, Mg<2+>, SO4<2->, Fe<3+> and other heavy metal ions in chloride ion-containing water obtained by water washing from the solution, and removing the precipitates and insoluble impurities by filtration to obtain a filtrate as an electrolyte for the next process, and 2, electrolyzing the chloride ion-containing water obtained by the above process to produce chlorine, hydrogen and a caustic soda solution. The chlorination furnace slag washing treatment method solves a key technical problem limiting use of chlorination furnace slag in a building material industry. Through the chlorination furnace slag washing treatment method, chloride ions in chlorination furnace slag are removed and the chlorination furnace slag can be directly used in the building material industry so that chloride ion-containing water treatment and recycling are realized simultaneously and a large amount of chlorine is provided for a chlorination process of TiCl4 preparation. Through removal of harmful impurity ions and other insoluble impurities, saline water satisfying electrolytic requirements is obtained and a production cost is low.
Description
Technical field
The present invention relates to technical field of smelting, specifically a kind of water washing treatment method of chlorinated furnace slag and the application for the treatment of solution.
Background technology
Fluidizing chlorination technology is an important technical links in titanium white and titanium sponge production process, and under certain reduction carbon existence condition, the preferential chlorination of the CaO in rich titanium material and MgO generates CaCl
2and MgCl
2, in chlorination process, be difficult to volatilization and remove.In slag after chloridized, contain a large amount of CaCl
2, MgCl
2with a small amount of FeCl
3, MnCl
2if, using chlorinated furnace slag be directly used in prepare cement or as admixture for concrete, in slag, contained chlorion produces very strong corrosive nature to reinforcing bar, this has seriously limited the application of chlorinated furnace slag at building material industry.The chlorion of removing in chlorinated furnace slag becomes guardian technique problem anxious to be resolved in slag application.By water-washing technique, can remove the chlorion in chlorinated furnace slag is soluble in water, but the processing of chloride ion-containing water has become again new problem, this water does not reach discharging standards, can not directly discharge.
Summary of the invention
The object of invention is to provide a kind of chlorion that can remove in chlorinated furnace slag, makes slag can directly apply to building material industry, has solved the water washing treatment method of the processing of chloride ion-containing water and the chlorinated furnace slag of resource utilization problem simultaneously.
The chlorinated furnace slag that titanium-containing blast furnace slag and ilmenite smelting titanium slag obtain after chloridized, it is the main raw material that the present invention adopts, chlorinated furnace slag is washed, and the water lotion of generation buries operation by removing foreign ion and purification place, makes it for electrolysis production chlorine, hydrogen and caustic soda.
In order to remove the chlorion in chlorinated furnace slag, the present invention adopts method for washing to remove the chlorion in chlorinated furnace slag is soluble in water, the foreign ion Na in the water lotion obtaining
2cO
3, NaOH and BaCl
2precipitate, and remove by filter together with other insoluble impuritiess, the aqueous solution obtaining is produced the raw material of chlorine, hydrogen and caustic soda by electrolytic process.
(1) method for washing of chlorinated furnace slag:
Chlorion in chlorinated furnace slag, by the method for washing, is added in water and is removed.
(2) chloride ion-containing water purification is processed:
Ca in the chloride ion-containing water that above-mentioned water washing process is obtained
2+, Mg
2+, SO
4 2-, Fe
3+from solution, separate with the form of precipitation with other heavy metal ion, then these precipitations and insoluble impurities are removed by the method for filtering, resulting filtrate is used as electrolytic solution in next step operation.
(3) electrolysis of chloride ion-containing water:
Chloride ion-containing water in the above-mentioned operation of electrolysis, produces chlorine, hydrogen and caustic soda soln.
The positively effect that the present invention compared with prior art had:
Compare with the technique that general chlorine industry adopts, the invention solves the guardian technique difficult problem that restriction chlorinated furnace slag is applied in building material industry, removed the chlorion in chlorinated furnace slag, make slag can directly apply to building material industry, solved processing and the resource utilization problem of chloride ion-containing water, be also preparation TiCl simultaneously
4chloride process a large amount of chlorine is provided.The chloride ion-containing water that the salt solution that the present invention uses in electrolytic process mainly obtains from washing chlorinated furnace slag, by removing detrimental impurity ion and other insoluble impuritiess, obtains meeting the salt solution of electrolysis requirement, and production cost is very low.
Accompanying drawing explanation
Fig. 1 is the process route chart of the water washing treatment method of chlorinated furnace slag of the present invention.
Fig. 2 is the water washing process schematic diagram of chlorinated furnace slag of the present invention.
Embodiment
Operational path of the present invention as shown in Figure 1, mainly comprises three steps: the 1. washing of chlorinated furnace slag; 2. chloride ion-containing water purification is processed; 3. the electrolysis of chloride ion-containing water, is described below:
1. the washing of chlorinated furnace slag:
As shown in Figure 2, the method for washing of chlorinated furnace slag adopts and repeatedly carries out on a small quantity, washing times is more than three times, first use a small amount of clear water (slag 10-20 centimetre was flooded in requirement) to soak chlorinated furnace slag 1-2 hour above (except first cycles of washing, slag is herein to be cleaned for the last time, the height of placing the groove of chlorinated furnace slag surpasses 0.3m, the add-on of chlorinated furnace slag reach cell body long-pending 2/3rds), emit washing water, the aqueous solution flows in the groove that the next one is placed with chlorinated furnace slag (slag is herein to be cleaned for the second time), soak chlorinated furnace slag more than 1-2 hour, emit washing water, the aqueous solution flows in the 3rd groove that fills chlorinated furnace slag (slag is herein to be cleaned for the first time), soak chlorinated furnace slag more than 1-2 hour.This process is all dissolved in water the muriates such as calcium chloride, magnesium chloride, iron(ic) chloride and Manganous chloride tetrahydrate in slag, then plays slag discharging, for the preparation of cement, or is used as concrete admixture etc.; The washing water of emitting can be used continuously, and in the aqueous solution, muriatic concentration constantly increases, and make in water the muriatic concentration outflow tank that reaches capacity, and enter cleaning section.Can, so that chlorinated furnace slag is repeatedly cleaned, also can make the aqueous solution reach capacity like this.
2. chloride ion-containing water purification is processed:
Make to contain the clarification of the muriatic aqueous solution, then flow in another pond, by analytical test and calculate Ca in the aqueous solution
2+, Mg
2+and SO
4 2-volumetric molar concentration and total mole number, then add Na
2cO
3, theory adds Na
2cO
3total mole number and solution in Ca
2+total mole number equate, actual add-on requires to surpass theoretical add-on, by Na
2cO
3the excessive 0.25-0.6g/L that is controlled at, remove the Ca in solution
2+, then add NaOH, theory to add the total mole number of NaOH to equal Mg in solution
2+2 times of total mole number, actual add-on requires to surpass theoretical add-on, and the excessive 0.07-0.6g/L that is controlled at by NaOH, removes the Mg in solution
2+and Fe
3+, finally add BaCl
2, theory adds BaCl
2total mole number and solution in SO
4 2-total mole number equate, actual add-on equates with theoretical add-on, removes the SO in solution
4 2-, by solution filter, remove precipitation and other insoluble impuritiess.
3. the electrolysis of chloride ion-containing water:
Resulting filtrate adds in electrolyzer carries out electrolysis, and anodic product is chlorine, and cathode product is hydrogen, and residue electrolytic solution is the solution containing caustic soda.Owing to needing a large amount of chlorine in titanium-riched material chlorination operation, the chlorine that electrolysis obtains can directly turn back in titanium-riched material chlorination operation, also can sell outward, and hydrogen and caustic soda can direct marketings.
Claims (4)
1. a water washing treatment method for chlorinated furnace slag, is characterized in that carrying out according to the following steps: the chlorion in chlorinated furnace slag, by the method for washing, is added in water and is removed.
2. the water washing treatment method of chlorinated furnace slag according to claim 1, is characterized in that the method for washing of chlorinated furnace slag adopts a small amount of method repeatedly, and washing times, more than three times, is soaked in water more than 1-2 hour at every turn, finally emits washing water.
3. the water washing treatment method of chlorinated furnace slag claimed in claim 1 and the application for the treatment of solution, its feature comprises following process:
(1) chloride ion-containing water purification is processed: by the Ca in the chloride ion-containing water of water washing process described in claim 1
2+, Mg
2+, SO
4 2-, Fe
3+from solution, separate with the form of precipitation with other heavy metal ion, then these precipitations and insoluble impurities are removed by the method for filtering, resulting filtrate is used as electrolytic solution in next step operation;
(2) electrolysis of chloride ion-containing water: the chloride ion-containing water obtaining in the above-mentioned operation of electrolysis, produce chlorine, hydrogen and caustic soda soln.
4. the water washing treatment method of chlorinated furnace slag according to claim 3 and the application for the treatment of solution, is characterized in that: in (1) step, first add Na
2cO
3, remove the Ca in solution
2+, then add NaOH, remove the Mg in solution
2+and Fe
3+, finally add BaCl
2, remove the SO in solution
4 2-, by solution filter, remove precipitation and other insoluble impuritiess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410109252.8A CN103952715A (en) | 2014-03-17 | 2014-03-17 | Chlorination furnace slag washing treatment method and use of treatment liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410109252.8A CN103952715A (en) | 2014-03-17 | 2014-03-17 | Chlorination furnace slag washing treatment method and use of treatment liquid |
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|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111268771A (en) * | 2020-02-17 | 2020-06-12 | 北京科技大学 | Electrochemical method for dechlorinating and removing heavy metals from incineration fly ash water washing liquid |
| CN111646499A (en) * | 2020-06-29 | 2020-09-11 | 攀钢集团钒钛资源股份有限公司 | Titanium extraction tailing washing treatment method |
| CN113718292A (en) * | 2021-08-27 | 2021-11-30 | 河南佰利联新材料有限公司 | Method for recycling waste residues in titanium dioxide production by chlorination process |
-
2014
- 2014-03-17 CN CN201410109252.8A patent/CN103952715A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111268771A (en) * | 2020-02-17 | 2020-06-12 | 北京科技大学 | Electrochemical method for dechlorinating and removing heavy metals from incineration fly ash water washing liquid |
| CN111646499A (en) * | 2020-06-29 | 2020-09-11 | 攀钢集团钒钛资源股份有限公司 | Titanium extraction tailing washing treatment method |
| CN113718292A (en) * | 2021-08-27 | 2021-11-30 | 河南佰利联新材料有限公司 | Method for recycling waste residues in titanium dioxide production by chlorination process |
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Application publication date: 20140730 |