CN102603011A - Method for preparing iron oxide red by utilizing valuable metal ferrous post-leaching solution of wet metallurgy - Google Patents
Method for preparing iron oxide red by utilizing valuable metal ferrous post-leaching solution of wet metallurgy Download PDFInfo
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- CN102603011A CN102603011A CN2012100507252A CN201210050725A CN102603011A CN 102603011 A CN102603011 A CN 102603011A CN 2012100507252 A CN2012100507252 A CN 2012100507252A CN 201210050725 A CN201210050725 A CN 201210050725A CN 102603011 A CN102603011 A CN 102603011A
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Abstract
The invention discloses a method for preparing iron oxide red by utilizing a valuable metal ferrous post-leaching solution of wet metallurgy. The method comprises the following steps of: regulating a pH value of the valuable metal ferrous post-leaching solution to prepare an iron oxide red prefabrication; and desulphurizing the iron oxide red prefabrication to obtain a high-quality iron oxide red product, wherein the desulphurization method includes one or more of calcination desulphurization, high-pressure decomposition desulphurization and washing desulphurization. The method for preparing the iron oxide red by utilizing the valuable metal ferrous post-leaching solution of wet metallurgy can be well butt joined with a main extraction flow of the valuable metal, so that the iron can be maximally removed, content of sulfur in the prefabricated iron oxide red can be greatly reduced, the quality of the prepared iron oxide red product is high, the requirement of the iron-making industry on the content of sulfur in iron core concentrate can be met, and the iron slag in the wet metallurgy is converted to the high-quality iron oxide red product through the method.
Description
Technical field
The invention belongs to the chemical products production technical field, more specifically, the present invention relates to a kind of valuable metal iron content of hydrometallurgy of utilizing and leach the method that back liquid prepares red iron oxide.
Background technology
At present when wet production zinc, nickel, cobalt or other valuable metal, adopt yellow (sodium, ammonium) siderotil or separation of iron in goethite form usually, the scum after the deironing is sent into tailing dam and is stored up behind filtration washing.The quantity of slag is big after this method deironing, and this slag can't use as resources circulation at present, take not only that a large amount of soils are stored up and wherein the slow stripping of unwanted component caused environmental pollution.
If will leach back liquid through after adjusting the pH value, control reaction process processing condition then can directly generate red iron oxide.But the red iron oxide sulphur content that aforesaid method is produced is higher, can not directly apply in ironmaking and the coating industry.
Summary of the invention
The present invention is intended to one of solve the problems of the technologies described above at least.
For this reason, one object of the present invention is to propose simple, the low-sulfur content valuable metal iron content of hydrometallurgy of utilizing of a kind of method and leaches the method that back liquid prepares red iron oxide.
The valuable metal iron content of utilizing hydrometallurgy according to the embodiment of the invention leaches the method that back liquid prepares red iron oxide, may further comprise the steps: regulate the pH value that said valuable metal iron content leaches back liquid, obtain the red iron oxide prefabrication; Said red iron oxide prefabrication is carried out sulphur removal to obtain the red iron oxide product, and wherein, said process for sulfur removal comprises one or more in calcining sulphur removal, high-pressure decomposing sulphur removal and the washing sulphur removal.
The valuable metal iron content of utilizing hydrometallurgy according to the embodiment of the invention leaches the method that back liquid prepares red iron oxide; Can extract main flow with valuable metal well docks; At utmost remove impurity iron, sulphur content also declines to a great extent, and the red iron oxide quality product that obtains is high; Reached the requirement of iron industry, and solved scum and store up problem sulphur content in the iron ore concentrate.
In addition, the valuable metal iron content of hydrometallurgy of utilizing according to the above embodiment of the present invention leaches the method that back liquid prepares red iron oxide, can also have following additional technical characterictic:
According to one embodiment of present invention, said calcining sulphur removal comprises: the red iron oxide prefabrication is put into roasting assembly, and control calcining temperature and calcination time are to remove the sulphur in the said red iron oxide prefabrication.
According to one embodiment of present invention, said calcining temperature is 700-1200 ℃.
According to one embodiment of present invention, said calcination time is 0.5-3 hour.
According to one embodiment of present invention, said high-pressure decomposing sulphur removal comprises: the red iron oxide prefabrication is put into reaction kettle and added entry, and after this control reaction temperature and reaction times are to remove the sulphur in the red iron oxide prefabrication.
According to one embodiment of present invention, said temperature of reaction is 110-220 ℃.
According to one embodiment of present invention, said reaction times is 0.5-2.5 hour.
According to one embodiment of present invention, said washing sulphur removal comprises: the red iron oxide prefabrication is put into container, under wash temperature, add washing reagent with predetermined liquid-solid ratio the red iron oxide prefabrication is carried out countercurrent washing.
According to one embodiment of present invention, said wash temperature is between room temperature～100 ℃.
According to one embodiment of present invention, said liquid-solid ratio is 3-6: 1.
According to one embodiment of present invention, said washing reagent is acid detergent, alkalis or neutral solvent, and said washing reagent comprises sulfuric acid, hydrochloric acid, oxalic acid, ammoniacal liquor, caustic soda or ethanol.
According to one embodiment of present invention, said countercurrent washing is a multistage washing, and the washing time of every section washing is 0.1-1 hour.
According to one embodiment of present invention, said multistage washing is 3 sections washings.
According to one embodiment of present invention, every countercurrent washing period is 0.1-1 hour.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage obviously with are easily understood becoming the description of embodiment from combining figs, wherein:
Fig. 1 is that the valuable metal iron content of hydrometallurgy of utilizing according to an embodiment of the invention leaches the schematic flow sheet that back liquid prepares the method for red iron oxide.
Embodiment
Describe embodiments of the invention below in detail.The embodiment that describes below is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
At first, the valuable metal iron content of utilizing hydrometallurgy of describing the embodiment of the invention with reference to figure 1 leaches the method journey that back liquid prepares red iron oxide.
The method that the valuable metal iron content leaching back liquid that utilizes hydrometallurgy involved in the present invention prepares red iron oxide generally comprises the pH value of regulating said valuable metal iron content leaching back liquid, obtains the red iron oxide prefabrication; Said red iron oxide prefabrication is carried out sulphur removal to obtain the red iron oxide product, and wherein, said process for sulfur removal comprises one or more in calcining sulphur removal, high-pressure decomposing sulphur removal and the washing sulphur removal.
Thus; This method for preparing red iron oxide can be extracted main flow with valuable metal well and dock, and at utmost removes impurity iron, and sulphur content also declines to a great extent; The red iron oxide quality product that obtains is high; Reached the requirement of iron industry, and solved scum and store up problem, improved recovery rate of valuable metals sulphur content in the iron ore concentrate.
According to one embodiment of present invention, said calcining sulphur removal specifically can comprise: the red iron oxide prefabrication is put into roasting assembly, and control calcining temperature and calcination time are to remove the sulphur in the said red iron oxide prefabrication.Said roasting assembly does not have particular restriction, for example can be retort furnace.
Advantageously, according to one embodiment of present invention, said calcining temperature is 700-1200 ℃.
Further, according to one embodiment of present invention, said calcination time is 0.5-3 hour.
According to one embodiment of present invention, said high-pressure decomposing sulphur removal specifically can comprise: the red iron oxide prefabrication is put into reaction kettle and added entry, and after this control reaction temperature and reaction times are to remove the sulphur in the red iron oxide prefabrication.Said reaction kettle does not have particular restriction, as long as the pressure of ability conditioned reaction for example can be autoclave to certain temperature.
Advantageously, according to one embodiment of present invention, said temperature of reaction is 110-220 ℃.
Further, according to one embodiment of present invention, the said reaction times is 0.5-2.5 hour.
According to one embodiment of present invention, said washing sulphur removal concrete operations step can comprise: the red iron oxide prefabrication is put into container, under wash temperature, add washing reagent with predetermined liquid-solid ratio the red iron oxide prefabrication is carried out countercurrent washing.Said container does not have particular restriction, for example can be beaker.
According to one embodiment of present invention, said wash temperature can be between room temperature～100 ℃.
Advantageously, according to one embodiment of present invention, said liquid-solid ratio is 3-6: 1.
According to one embodiment of present invention, said washing reagent is acid detergent, alkalis or neutral solvent, and said washing reagent comprises sulfuric acid, hydrochloric acid, oxalic acid, ammoniacal liquor, caustic soda or ethanol.
According to one embodiment of present invention, said countercurrent washing is a multistage washing, and the washing time of every section washing is 0.1-1 hour.
Advantageously, according to one embodiment of present invention, said multistage washing is 3 sections washings.
Further, according to one embodiment of present invention, every countercurrent washing period is 0.1-1 hour.
The selection of the above process for sulfur removal does not have particular restriction, for example can choose any one kind of them and use separately, can select two or three series combination to use yet.
Despise the present invention through specific embodiment below.
Embodiment 1
Regulate the pH value of valuable metal iron content leaching back liquid, obtain the red iron oxide prefabrication.
Get red iron oxide prefabrication 100g, put into retort furnace, 900 ℃ of controlled temperature, calcination time 2h obtains the red iron oxide product.
Red iron oxide product to obtaining is analyzed, and gained red iron oxide product sulphur content is 0.05%.
Embodiment 2
Regulate the pH value of valuable metal iron content leaching back liquid, obtain the red iron oxide prefabrication.
Get red iron oxide prefabrication 100g, add in the autoclave, and add 500mL water, 180 ℃ of controlled temperature, treatment time 2h obtains the red iron oxide product.
Red iron oxide product to obtaining is analyzed, and gained red iron oxide product sulphur content is 0.40%.
Embodiment 3
Regulate the pH value of valuable metal iron content leaching back liquid, obtain the red iron oxide prefabrication.
Getting red iron oxide prefabrication 100g, add in the beaker, dispose alkaline washing reagent simultaneously, is 50 ℃ of following 3 sections countercurrent washings in temperature, and liquid-solid ratio is 3: 1, and every section washing time is 20min, obtains the red iron oxide product.
Red iron oxide product to obtaining is analyzed, and gained red iron oxide product sulphur content is 0.30%.
Embodiment 4
Regulate the pH value of valuable metal iron content leaching back liquid, obtain the red iron oxide prefabrication.
Get red iron oxide prefabrication 100g, add in the autoclave, and add 300mL water, 150 ℃ of controlled temperature, treatment time 2h obtains the red iron oxide head product.
The red iron oxide head product is analyzed, and gained red iron oxide head product sulphur content is 0.40%.
The red iron oxide head product being added in the beaker again, dispose alkaline washing reagent simultaneously, is 50 ℃ of following 3 sections countercurrent washings in temperature, and liquid-solid ratio is 3: 1, and every section washing time is 20min, obtains the red iron oxide product.
Red iron oxide product to obtaining is analyzed, and gained red iron oxide product sulphur content is 0.20%.
Can find out that according to the abovementioned embodiments of the present invention this prepares the method simple possible of red iron oxide, can extract main flow with valuable metal well and dock; At utmost remove impurity iron; Sulphur content also declines to a great extent, and the red iron oxide quality product that obtains is high, has reached the requirement of iron industry to sulphur content in the iron ore concentrate; And solved scum and stored up problem, improved recovery rate of valuable metals.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiment or example.
Although illustrated and described embodiments of the invention; Those having ordinary skill in the art will appreciate that: under the situation that does not break away from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited claim and equivalent thereof.
Claims (14)
1. one kind is utilized the valuable metal iron content of hydrometallurgy to leach the method that back liquid prepares red iron oxide, it is characterized in that, may further comprise the steps: regulate the said pH value that leaches back liquid, obtain the red iron oxide prefabrication;
Said red iron oxide prefabrication is carried out sulphur removal with acquisition red iron oxide product,
Wherein, said process for sulfur removal comprises one or more in calcining sulphur removal, high-pressure decomposing sulphur removal and the washing sulphur removal.
2. the valuable metal iron content of hydrometallurgy of utilizing according to claim 1 leaches the method that back liquid prepares red iron oxide; It is characterized in that; Said calcining sulphur removal comprises: the red iron oxide prefabrication is put into roasting assembly, and control calcining temperature and calcination time are to remove the sulphur in the said red iron oxide prefabrication.
3. the method for utilizing the valuable metal iron content leaching back liquid oxidation iron oxide red of hydrometallurgy according to claim 2 is characterized in that said calcining temperature is 700-1200 ℃.
4. the valuable metal iron content of hydrometallurgy of utilizing according to claim 2 leaches the method that back liquid prepares red iron oxide, it is characterized in that said calcination time is 0.5-3 hour.
5. the valuable metal iron content of hydrometallurgy of utilizing according to claim 1 leaches the method that back liquid prepares red iron oxide; It is characterized in that; Said high-pressure decomposing sulphur removal comprises: the red iron oxide prefabrication is put into reaction kettle and added entry, and after this control reaction temperature and reaction times are to remove the sulphur in the red iron oxide prefabrication.
6. the valuable metal iron content of hydrometallurgy of utilizing according to claim 5 leaches the method that back liquid prepares red iron oxide, it is characterized in that said temperature of reaction is 110-220 ℃.
7. the valuable metal iron content of hydrometallurgy of utilizing according to claim 5 leaches the method that back liquid prepares red iron oxide, it is characterized in that the said reaction times is 0.5-2.5 hour.
8. the valuable metal iron content of hydrometallurgy of utilizing according to claim 1 leaches the method that back liquid prepares red iron oxide; It is characterized in that; Said washing sulphur removal comprises: the red iron oxide prefabrication is put into container; Under wash temperature, add washing reagent with predetermined liquid-solid ratio the red iron oxide prefabrication is carried out countercurrent washing.
9. the valuable metal iron content of utilizing hydrometallurgy according to claim 8 leaches the method that back liquid prepares red iron oxide, it is characterized in that, said wash temperature is between room temperature～100 ℃.
10. the valuable metal iron content of hydrometallurgy of utilizing according to claim 8 leaches the method that back liquid prepares red iron oxide, it is characterized in that said liquid-solid ratio is 3-6: 1.
11. the valuable metal iron content of hydrometallurgy of utilizing according to claim 8 leaches the method that back liquid prepares red iron oxide; It is characterized in that; Said washing reagent is acid detergent, alkalis or neutral solvent, and said washing reagent comprises sulfuric acid, hydrochloric acid, oxalic acid, ammoniacal liquor, caustic soda or ethanol.
12. the valuable metal iron content of hydrometallurgy of utilizing according to claim 8 leaches the method that back liquid prepares red iron oxide, it is characterized in that said countercurrent washing is a multistage washing, and the washing time of every section washing is 0.1-1 hour.
13. the valuable metal iron content of hydrometallurgy of utilizing according to claim 12 leaches the method that back liquid prepares red iron oxide, it is characterized in that said multistage washing is 3 sections washings.
14. the valuable metal iron content of hydrometallurgy of utilizing according to claim 8 leaches the method that back liquid prepares red iron oxide, it is characterized in that every countercurrent washing period is 0.1-1 hour.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100507252A CN102603011A (en) | 2012-02-29 | 2012-02-29 | Method for preparing iron oxide red by utilizing valuable metal ferrous post-leaching solution of wet metallurgy |
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| CN2012100507252A CN102603011A (en) | 2012-02-29 | 2012-02-29 | Method for preparing iron oxide red by utilizing valuable metal ferrous post-leaching solution of wet metallurgy |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139660A (en) * | 2007-10-08 | 2008-03-12 | 郑满秀 | Method for extracting iron-lead and gold-silver from gold concentrate acidifying baking residue |
| CN102153148A (en) * | 2011-05-05 | 2011-08-17 | 中国恩菲工程技术有限公司 | Method for preparing iron oxide red |
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2012
- 2012-02-29 CN CN2012100507252A patent/CN102603011A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101139660A (en) * | 2007-10-08 | 2008-03-12 | 郑满秀 | Method for extracting iron-lead and gold-silver from gold concentrate acidifying baking residue |
| CN102153148A (en) * | 2011-05-05 | 2011-08-17 | 中国恩菲工程技术有限公司 | Method for preparing iron oxide red |
Non-Patent Citations (2)
| Title |
|---|
| 何静等: "硫酸盐体系中水热法分离锌铁及制备软磁铁氧体用氧化铁粉", 《矿冶工程》 * |
| 郑雅杰等: "用水热法从硫铁矿烧渣制备氧化铁红", 《金属矿山》 * |
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Application publication date: 20120725 |