CN103641177B - A kind of method extracting high calcium slag mineral - Google Patents
A kind of method extracting high calcium slag mineral Download PDFInfo
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Abstract
Embodiments provide a kind of method extracting high calcium slag mineral, belong to slag utilization of resources field, obtain to make high calcium slag effectively, comprehensively utilizing.Described method comprises: the carbon granules in high calcium slag is separated removing, obtains glass dregs body; Described glass dregs body is dissolved in acid solution, filters, obtain acid extract and the first filter residue; By described first residue washing to filtrate pH=1-3.5, filter, filtrate and described acid extract are merged and obtains acid extraction liquid; In described first filter residue after washing, add alkali lye, filter, obtain alkali vat liquor and the second filter residue, by described second residue washing, filter, filtrate and described alkali vat liquor are merged and obtains alkali extracting solution; Collect described acid extraction liquid and described alkali extracting solution.The present invention can be used in the recycling of high calcium slag.
Description
Technical field
The present invention relates to slag utilization of resources field, particularly relate to a kind of method extracting high calcium slag mineral.
Background technology
Gasification of coal is one of main contents of coal utilization, and entrained flow gasification is then a kind of important form of gasification of coal.Along with improving constantly of gasification technology, existing many employing airflow bed gasification furnace technology.Ash content of coal melting in high-temperature entrained flow gasification process is that then liquid slag flows out slag-drip opening.And the slag-drip opening blocking that cause or the phenomenon of wall built-up difficulty too high or too low in order to avoid liquid slag viscosity, require that gasified raw material calcium contents is suitable for, and reaches preferably viscous state to make it usually.Because the slag now obtained is for common slag, there is higher calcium contents, so also this slag is called high calcium slag.
Because this high calcium slag has higher activation energy, so have higher additional utilization value.Effective method of carrying out extracting for the mineral substance in high calcium slag is not also had in prior art, because high calcium slag water content is high, carbon residue is many, glass dregs body wear resistance is good, therefore according to the method the same with extracting common slag mineral substance, as pulverized, sintering process carries out pre-treatment, not only need extra treatment step, spend higher cost, and effect is poor, so and be not suitable for the extraction of the mineral substance in high calcium slag, this not only limits making full use of of the most of by product high calcium slag obtained by entrained flow gasification process, also make that existing high calcium slag is many directly to be stacked or landfill, cause environmental pollution to a great extent and the wasting of resources.
Summary of the invention
Embodiments provide a kind of method extracting high calcium slag mineral, obtain to make high calcium slag effectively, comprehensively utilizing.
For achieving the above object, embodiments of the invention adopt following technical scheme:
Extract a method for high calcium slag mineral, comprise,
Step S1: the carbon granules in high calcium slag is separated removing, obtains glass dregs body;
Step S2: be dissolved in acid solution by described glass dregs body, filters, obtains acid extract and the first filter residue;
Step S3: by described first residue washing to filtrate pH=1-3.5, filters, filtrate and described acid extract is merged and obtain acid extraction liquid;
Step S4: add alkali lye in described first filter residue after washing, filters, obtains alkali vat liquor and the second filter residue, by described second residue washing, filters, filtrate and described alkali vat liquor is merged and obtain alkali extracting solution;
Step S5: collect described acid extraction liquid and described alkali extracting solution.
Optionally, the described acid solution in described step S2 is hydrochloric acid.
Optionally, described step S2 is specially:
It is in the hydrochloric acid of 28-37% that described glass dregs body is dissolved in mass percent concentration, constantly stirs, and at 75-95 DEG C of temperature, extraction time is 30-120min, filters, obtains acid extract and the first filter residue.
Optionally, the liquid-solid ratio of hydrochloric acid described in described step S2 and described glass dregs body is 2.5-6ml/g.
Optionally, the described concentration of hydrochloric acid in described step S2 is 32-37%, and described temperature is 85-90 DEG C, and described extraction time is 40-80min.
Optionally, the liquid-solid ratio of the described hydrochloric acid in described step S2 and described glass dregs body is 3.5-4ml/g.
Optionally, the described pH=2.5-3 in described step S3.
Optionally, the described alkali lye in described step S4 is sodium hydroxide.
Optionally, described step S4 is specially:
The sodium hydroxide that mass percent concentration is 9-30% is added in described first filter residue after washing, continuous stirring, at 70-100 DEG C of temperature, extraction time is 20-200min, filter, obtain alkali vat liquor and the second filter residue, and by described second residue washing, filtration, filtrate and described alkali vat liquor are merged and obtains alkali extracting solution.
Optionally, the liquid-solid ratio of sodium hydroxide described in described step S4 and described first filter residue is 3-13ml/g.
Optionally, the described naoh concentration in described step S4 is 13-21%, and described temperature is 90-95 DEG C, and described extraction time is 40-70min.
Optionally, the liquid-solid ratio of the described sodium hydroxide in described step S4 and described first filter residue is 6-11ml/g.
Embodiments provide a kind of method extracting high calcium slag mineral.The method, after carbon granules is separated removing, just can obtain several mineral materials by means of only using acid and alkali combination method.The method compared with the conventional method, after separation removing carbon granules, do not need to carry out pre-treatment to glass dregs body again, can be directly used in reaction, and the remaining after the reaction residue of glass dregs can use as feedstock circulation as required, its content is also only the 5-10% of high calcium slag total amount, makes it be fully used.In addition, from high calcium slag, extract the mineral substance obtained, i.e. the chloride mix of iron, aluminium, calcium and water glass, due to their rate of recovery and purity all higher, and the demand in market is large, and this also makes high calcium slag obtain higher economic use value.In general, the method is simple, high efficiency, can realize suitability for industrialized production, and high calcium slag can be made to obtain effectively, comprehensively utilizing.
Accompanying drawing explanation
The method flow diagram of the extraction high calcium slag mineral that Fig. 1 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Be described in detail below in conjunction with the method for accompanying drawing to this extraction high calcium slag mineral that the embodiment of the present invention provides.
Embodiments provide a kind of method extracting high calcium slag mineral, described method comprises,
Step S1: the carbon granules in high calcium slag is separated removing, obtains glass dregs body.
High calcium slag is the by product obtained by entrained flow gasification process, and compared with common slag, have higher calcium contents, the massfraction of its calcium is higher than 8%.After carbon granules being separated from high calcium slag removing, the part obtained is glass dregs body.The described glass dregs body obtained in this step does not need just can be directly used in acid-base reaction through pretreatment process such as oversintering, interpolation auxiliary agents again.
In this step, glass dregs body is separated by the method by washing from high calcium slag.Be understandable that, the embodiment of the present invention is not limited to this, and those skilled in the art specifically can select the method being separated removing carbon granules from high calcium slag according to actual needs.
Step S2: be dissolved in acid solution by described glass dregs body, filters, obtains acid extract and the first filter residue.
In the present embodiment, because the described glass dregs body obtained in above-mentioned steps is without the need to carrying out pre-treatment again, can be directly used in acid-base reaction, so can described glass dregs body is dissolved in acid in this step, it is filtered, to obtain acid extract and the first filter residue.Acid selected in this step is hydrochloric acid, obtains stripping better to make the active substance in described glass dregs body.
This step is specially: it is in the hydrochloric acid of 28-37% that described glass dregs body is dissolved in mass percent concentration, constantly stirs, and at 75-95 DEG C of temperature, extraction time is 30-120min, filters, obtains acid extract and the first filter residue.Preferably, described concentration of hydrochloric acid is 32-37%, and described temperature is 85-90 DEG C, and described extraction time is 40-80min.In this step, selected acid is denseer acid, instead of diluted acid, this is because according to diluted acid, the silicon-dioxide in described glass dregs body can jointly exist with Al, Fe, the Ca etc. in solution with colloidal form and be difficult to be separated.So in this step, denseer acid be selected to participate in reaction.
In this step, the described hydrochloric acid of use and the liquid-solid ratio of described glass dregs body are 2.5-6ml/g.The amount of the described hydrochloric acid within the scope of this can make described glass dregs body obtain lixiviate effectively, and can not cause waste to described hydrochloric acid.Preferably, liquid-solid ratio is 3.5-4ml/g.Be understandable that, hydrochloric acid selected in this step can also be nitric acid, also identical effect can be reached, and in this step, sulfuric acid is not comprised in selected acid, this is because the calcium in sulfuric acid and high calcium slag reacts generation have expansile calcium sulfate, thus affect whole reaction system.
It should be noted that, in this step, described glass dregs body is dissolved in concentrated acid, it is being carried out after filtration obtains concentrated acid vat liquor, also a part of concentrated acid vat liquor wherein can be used for further extracting in the process of glass dregs body, now, comparatively react front reduction owing to reacting rear concentrated acid vat liquor acid concentration, so a certain amount of fresh concentrated acid mixing can be added as required as reaction acid solution in concentrated acid vat liquor, to improve the utilization ratio of acid.
Step S3: by described first residue washing to filtrate pH=1-3.5, filters, filtrate and described acid extract is merged and obtain acid extraction liquid.
In this step, need to wash described first filter residue, to wash away the described acid extract of described first filter residue surface attachment.It should be noted that, in this step, after described first filter residue being carried out to 2-3 washing, the comparision contents of the described acid extract due to its adhering on surface is low, so the diluted acid filtrate after available washing is washed described first filter residue as upper level washings, until last step washes with water, on the one hand can in same washings the amount of enrichment acid extract, the amount of solvent used when can save described first filter residue of washing on the other hand.Afterwards, the first step is washed the described acid extract obtained in the diluted acid filtrate and step S2 obtained and merge, obtain lixiviate acid extraction liquid completely.In this step, adopting the mode of washing to wash described first filter residue, is also avoid the ferrous ion on described first filter residue surface not cleaned, thus forms oxide film on described first filter residue surface, thus reduces the extraction yield of silicon-dioxide.Preferably, the pH=2.5-3 in this step.
Step S4: add alkali lye in described first filter residue after washing, filters, obtains alkali vat liquor and the second filter residue, by described second residue washing, filters, filtrate and described alkali vat liquor is merged and obtain alkali extracting solution.
This step is specially: in described first filter residue after washing, add the sodium hydroxide that mass percent concentration is 9-30%, constantly stir, at 70-100 DEG C of temperature, extraction time is 20-200min, filters, obtains alkali vat liquor and the second filter residue.Preferably, described naoh concentration is 13-21%, and described temperature is 90-95 DEG C, and described extraction time is 40-70min.In this step, after filtration obtains described second filter residue, also need to wash the second filter residue, to wash away the remaining alkali vat liquor in its surface, the filtrate obtained after washing and described alkali vat liquor are merged, to obtain alkali extracting solution completely.The alkali lye selected in this step is sodium hydroxide, is able to comprehensive stripping to make the active substance in described first filter residue.It should be noted that, the alkali lye in this step is not limited to this, as long as the alkali lye in this step is highly basic, those skilled in the art can select according to practical application.
It should be noted that, if the filtrate pH value of washing terminal in step S3 is lower, in order to prevent described first filter residue that obtains in above-mentioned steps oxidized, need to carry out lixiviate with sodium hydroxide solution as early as possible after obtaining described first filter residue, to avoid the desiliconization effect affected in this step.
Wherein, the liquid-solid ratio of described sodium hydroxide and described first filter residue is 3-13ml/g.The amount of the described sodium hydroxide within the scope of this can make described first filter residue obtain lixiviate effectively, and can not cause waste to described sodium hydroxide.Preferably, the liquid-solid ratio of described sodium hydroxide and described first filter residue is 6-11ml/g.In this step, also need constantly to stir reaction system, accelerated reaction.
It should be noted that, method in the embodiment of the present invention be first by acid solution to after the lixiviate of glass dregs body, again with alkali lye to filter after described first filter residue body continue lixiviate, this is because as according to alkali lye directly to the lixiviate of glass dregs body, the mineral substance in glass dregs body almost can not stripping.
Owing to containing a large amount of silicon-dioxide in described first filter residue, so after described first filter residue and alkaline reaction, a large amount of water glass can be obtained in described alkali extracting solution, i.e. water glass.This reaction formula is as follows:
NaOH+SiO
2→Na
2SiO
3+H
2O
Due to the basic raw material that water glass is silicon compound, so be that the deep processing series product of raw material are used in light industry, textile industry, building trade, agriculture aspect and silica-alumina catalyst aspect in a large number with water glass, increase the added value of high calcium slag, huge economic use value can be brought thus.
Wherein, described second filter residue is glass dregs body at remaining residue last after using acid and alkali combination method lixiviate, because the composition in described residue is not for be separated carbon, unreacted glass dregs body thoroughly, so described residue part can continue reaction as raw material or is used as material of construction.It should be noted that, namely high calcium slag itself can be used as material of construction, but has higher activation energy due to it, additional utilization value is higher, and China's cement industry exists the present situation of production capacity surplus, so the present invention selects first to develop it, and residual residue is used in material of construction.
Step S5: collect described acid extraction liquid and described alkali extracting solution.
In this step, the solution that the solution obtained is respectively chloride mix containing iron, aluminium, calcium and water glass is collected from described acid extraction liquid and described alkali extracting solution, wherein, the chloride mix of the iron obtained, aluminium, calcium is not processed, but exist in fluid form, to make it further be processed as required, obtained desired product, the chloride mix of the iron obtained, aluminium, calcium can be further used in the preparation of aluminium or water purification agent, flocculation agent.
The method of this extraction high calcium slag mineral that the embodiment of the present invention provides, after carbon granules is separated removing, just several mineral materials the method can be obtained compared with the conventional method by means of only using acid and alkali combination method, after separation removing carbon granules, do not need to carry out pre-treatment to glass dregs body again, can be directly used in reaction, and the remaining after the reaction residue of glass dregs can use as feedstock circulation as required, its content is also only the 5-10% of high calcium slag total amount, makes it be fully used.In addition, extract the mineral substance obtained from high calcium slag, i.e. the chloride mix of iron, aluminium, calcium and water glass, their rate of recovery is all higher, and being in great demand of market, this also makes high calcium slag obtain higher economic use value.In general, the method is simple, high efficiency, can realize suitability for industrialized production, and high calcium slag can be made to obtain effectively, comprehensively utilizing.
In order to the method for extraction high calcium slag mineral provided by the invention is better described, be described in detail with specific embodiment below.
Embodiment 1
First, take high calcium slag 20g, wash 3 times, be separated removing carbon granules, obtain glass dregs body; In glass dregs body, add the hydrochloric acid (liquid-solid ratio of hydrochloric acid and glass dregs body is 4ml/g) that mass percent concentration is 28%, constantly stir, at 95 DEG C, lixiviate 90min, filters, obtains acid extract and the first filter residue; Subsequently with water to the first filter residue repetitive scrubbing to pH=2.5, filter, filtrate and acid extract are merged and obtain acid extraction liquid; Afterwards, add the sodium hydroxide (liquid-solid ratio of sodium hydroxide and the first filter residue is 11ml/g) that mass percent concentration is 13%, constantly stir in the first filter residue after washing, at 90 DEG C, lixiviate 60min, filters, obtains alkali vat liquor and the second filter residue; Afterwards, the second filter residue is washed, filter, filtrate and alkali vat liquor are merged and obtains alkali extracting solution; Finally, respectively acid extraction liquid and alkali extracting solution are collected, obtain the solution of chloride mix containing iron, aluminium, calcium and water glass respectively.
Embodiment 2
First, take high calcium slag 20g, wash 3 times, be separated removing carbon granules, obtain glass dregs body; In glass dregs body, add the hydrochloric acid (liquid-solid ratio of hydrochloric acid and glass dregs body is 3.8ml/g) that mass percent concentration is 30%, constantly stir, at 90 DEG C, lixiviate 40min, filters, obtains acid extract and the first filter residue; Subsequently with water to the first filter residue repetitive scrubbing to pH=2.2, filter, filtrate and acid extract are merged and obtain acid extraction liquid; Afterwards, add the sodium hydroxide (liquid-solid ratio of sodium hydroxide and the first filter residue is 11ml/g) that mass percent concentration is 13%, constantly stir in the first filter residue after washing, at 90 DEG C, lixiviate 60min, filters, obtains alkali vat liquor and the second filter residue; Afterwards, the second filter residue is washed, filter, filtrate and alkali vat liquor are merged and obtains alkali extracting solution; Finally, respectively acid extraction liquid and alkali extracting solution are collected, obtain the solution of chloride mix containing iron, aluminium, calcium and water glass respectively.
Embodiment 3
First, take high calcium slag 20g, wash 3 times, be separated removing carbon granules, obtain glass dregs body; In glass dregs body, add the hydrochloric acid (liquid-solid ratio of hydrochloric acid and glass dregs body is 3.5ml/g) that mass percent concentration is 32%, constantly stir, at 85 DEG C, lixiviate 60min, filters, obtains acid extract and the first filter residue; Subsequently with water to the first filter residue repetitive scrubbing to pH=2.8, filter, filtrate and acid extract are merged and obtain acid extraction liquid; Afterwards, add the sodium hydroxide (liquid-solid ratio of sodium hydroxide and the first filter residue is 11ml/g) that mass percent concentration is 13%, constantly stir in the first filter residue after washing, at 90 DEG C, lixiviate 60min, filters, obtains alkali vat liquor and the second filter residue; Afterwards, the second filter residue is washed, filter, filtrate and alkali vat liquor are merged and obtains alkali extracting solution; Finally, respectively acid extraction liquid and alkali extracting solution are collected, obtain the solution of chloride mix containing iron, aluminium, calcium and water glass respectively.
Embodiment 4
First, take high calcium slag 20g, wash 4 times, be separated removing carbon granules, obtain glass dregs body; In glass dregs body, add the hydrochloric acid (liquid-solid ratio of hydrochloric acid and glass dregs body is 3.4ml/g) that mass percent concentration is 36%, constantly stir, at 75 DEG C, lixiviate 60min, filters, obtains acid extract and the first filter residue; Subsequently with water to the first filter residue repetitive scrubbing to pH=3, filter, filtrate and acid extract are merged and obtain acid extraction liquid; Afterwards, add the sodium hydroxide (liquid-solid ratio of sodium hydroxide and the first filter residue is 11ml/g) that mass percent concentration is 13%, constantly stir in the first filter residue after washing, at 90 DEG C, lixiviate 60min, filters, obtains alkali vat liquor and the second filter residue; Afterwards, the second filter residue is washed, filter, filtrate and alkali vat liquor are merged and obtains alkali extracting solution; Finally, respectively acid extraction liquid and alkali extracting solution are collected, obtain the solution of chloride mix containing iron, aluminium, calcium and water glass respectively.
Embodiment 5
First, take high calcium slag 20g, wash 4 times, be separated removing carbon granules, obtain glass dregs body; In glass dregs body, add the hydrochloric acid (liquid-solid ratio of hydrochloric acid and glass dregs body is 3.5ml/g) that mass percent concentration is 32%, constantly stir, at 85 DEG C, lixiviate 60min, filters, obtains acid extract and the first filter residue; Subsequently with water to the first filter residue repetitive scrubbing to pH=2.5, filter, filtrate and acid extract are merged and obtain acid extraction liquid; Afterwards, add the sodium hydroxide (liquid-solid ratio of sodium hydroxide and the first filter residue is 6ml/g) that mass percent concentration is 21%, constantly stir in the first filter residue after washing, at 95 DEG C, lixiviate 40min, filters, obtains alkali vat liquor and the second filter residue; Afterwards, the second filter residue is washed, filter, filtrate and alkali vat liquor are merged and obtains alkali extracting solution; Finally, respectively acid extraction liquid and alkali extracting solution are collected, obtain the solution of chloride mix containing iron, aluminium, calcium and water glass respectively.
Embodiment 6
First, take high calcium slag 20g, wash 4 times, be separated removing carbon granules, obtain glass dregs body; In glass dregs body, add the hydrochloric acid (liquid-solid ratio of hydrochloric acid and glass dregs body is 3.5ml/g) that mass percent concentration is 32%, constantly stir, at 87 DEG C, lixiviate 60min, filters, obtains acid extract and the first filter residue; Subsequently with water to the first filter residue repetitive scrubbing to pH=2.7, filter, filtrate and acid extract are merged and obtain acid extraction liquid; Afterwards, add the sodium hydroxide (liquid-solid ratio of sodium hydroxide and the first filter residue is 8ml/g) that mass percent concentration is 18%, constantly stir in the first filter residue after washing, at 94 DEG C, lixiviate 70min, filters, obtains alkali vat liquor and the second filter residue; Afterwards, the second filter residue is washed, filter, filtrate and alkali vat liquor are merged and obtains alkali extracting solution; Finally, respectively acid extraction liquid and alkali extracting solution are collected, obtain the solution of chloride mix containing iron, aluminium, calcium and water glass respectively.
Embodiment 7
First, take high calcium slag 20g, wash 5 times, be separated removing carbon granules, obtain glass dregs body; In glass dregs body, add the hydrochloric acid (liquid-solid ratio of hydrochloric acid and glass dregs body is 3.5ml/g) that mass percent concentration is 32%, constantly stir, at 88 DEG C, lixiviate 60min, filters, obtains acid extract and the first filter residue; Subsequently with water to the first filter residue repetitive scrubbing to pH=2.9, filter, filtrate and acid extract are merged and obtain acid extraction liquid; Afterwards, add the sodium hydroxide (liquid-solid ratio of sodium hydroxide and the first filter residue is 10ml/g) that mass percent concentration is 15%, constantly stir in the first filter residue after washing, at 92 DEG C, lixiviate 50min, filters, obtains alkali vat liquor and the second filter residue; Afterwards, the second filter residue is washed, filter, filtrate and alkali vat liquor are merged and obtains alkali extracting solution; Finally, respectively acid extraction liquid and alkali extracting solution are collected, obtain the solution of chloride mix containing iron, aluminium, calcium and water glass respectively.
Embodiment 8
First, take high calcium slag 20g, wash 5 times, be separated removing carbon granules, obtain glass dregs body; In glass dregs body, add the hydrochloric acid (liquid-solid ratio of hydrochloric acid and glass dregs body is 3.5ml/g) that mass percent concentration is 32%, constantly stir, at 90 DEG C, lixiviate 60min, filters, obtains acid extract and the first filter residue; Subsequently with water to the first filter residue repetitive scrubbing to pH=3, filter, filtrate and acid extract are merged and obtain acid extraction liquid; Afterwards, add the sodium hydroxide (liquid-solid ratio of sodium hydroxide and the first filter residue is 11ml/g) that mass percent concentration is 13%, constantly stir in the first filter residue after washing, at 90 DEG C, lixiviate 60min, filters, obtains alkali vat liquor and the second filter residue; Afterwards, the second filter residue is washed, filter, filtrate and alkali vat liquor are merged and obtains alkali extracting solution; Finally, respectively acid extraction liquid and alkali extracting solution are collected, obtain the solution of chloride mix containing iron, aluminium, calcium and water glass respectively.
Embodiment 9
First, take high calcium slag 20g, wash 5 times, be separated removing carbon granules, obtain glass dregs body; In glass dregs body, add the nitric acid (liquid-solid ratio of nitric acid and glass dregs body is 3.5ml/g) that mass percent concentration is 51%, constantly stir, at 85 DEG C, lixiviate 60min, filters, obtains acid extract and the first filter residue; Subsequently with water to the first filter residue repetitive scrubbing to pH=2.5, filter, filtrate and acid extract are merged and obtain acid extraction liquid; Afterwards, add the sodium hydroxide (liquid-solid ratio of sodium hydroxide and the first filter residue is 7.5ml/g) that mass percent concentration is 17%, constantly stir in the first filter residue after washing, at 95 DEG C, lixiviate 60min, filters, obtains alkali vat liquor and the second filter residue; Afterwards, the second filter residue is washed, filter, filtrate and alkali vat liquor are merged and obtains alkali extracting solution; Finally, respectively acid extraction liquid and alkali extracting solution are collected, obtain the solution of chloride mix containing iron, aluminium, calcium and water glass respectively.
Above-described embodiment 1-4 is the embodiment that the condition down conversion acid extraction parameter of fixing in alkaline extraction parameter obtains, by fixed base extraction conditions, conversion acid extraction condition, and using the mass fraction of iron in acid extraction liquid and level of residue ratio (i.e. the ratio of the first filter residue content and total high calcium cinders content) as criterion gained result of implementation; Embodiment 5-8 is the embodiment that the condition down conversion alkaline extraction parameter of fixing in acid extraction parameter obtains, by fixed acid extraction conditions, conversion alkaline extraction condition, and obtain dioxide-containing silica after being converted by water glass in alkali extracting solution and account for the massfraction of silica composition content in glass dregs body and level of residue ratio (i.e. the ratio of the second filter residue content and total high calcium cinders content) as criterion gained result of implementation; Implementing 9 is hydrochloric acid is replaced with the embodiment that nitric acid carries out, and criterion is the same.Concrete outcome is in table 1.
Each embodiment result cartogram in table 1 embodiment 1-9
| Fe% | Level of residue % | SiO 2% | Level of residue % | ||
| Embodiment 1 | 88.67% | 9.17% | Embodiment 5 | 92.65% | 5.21% |
| Embodiment 2 | 91.81% | 6.72% | Embodiment 6 | 93.76% | 6.88% |
| Embodiment 3 | 92.53% | 5.23% | Embodiment 7 | 93.61% | 8.15% |
| Embodiment 4 | 92.53% | 8.55% | Embodiment 8 | 93.88% | 7.39% |
| Embodiment 9 | 79.28% | 21.02% |
As from the foregoing, high calcium slag can obtain carbon granules and the glass dregs body of high heating value after being separated through simple operations, described glass dregs body is after being separated through the method in the embodiment of the present invention, remaining level of residue is only the 5%-10% of high calcium slag total amount, and the percentage composition extracting the iron obtained under more excellent condition from the acid solution of glass dregs body is up to more than 92%, the percentage composition of the silicon-dioxide obtained is extracted up to more than 93% from the alkali lye of glass dregs body, make the mineral substance in high calcium slag obtain stripping effectively, thus high calcium slag is obtained effectively, comprehensively utilize.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still in the protection domain of the invention.
Claims (12)
1. extract a method for high calcium slag mineral, it is characterized in that, comprise,
Step S1: the carbon granules in high calcium slag is separated removing, obtains glass dregs body;
Step S2: be dissolved in concentrated acid liquid by described glass dregs body, filters, obtains acid extract and the first filter residue;
Step S3: by described first residue washing to filtrate pH=1-3.5, filters, filtrate and described acid extract is merged and obtain acid extraction liquid;
Step S4: add alkali lye in described first filter residue after washing, filters, obtains alkali vat liquor and the second filter residue, by described second residue washing, filters, filtrate and described alkali vat liquor is merged and obtain alkali extracting solution;
Step S5: collect described acid extraction liquid and described alkali extracting solution.
2. method according to claim 1, is characterized in that, the described concentrated acid liquid in described step S2 is hydrochloric acid.
3. method according to claim 2, is characterized in that, described step S2 is specially:
It is in the hydrochloric acid of 28-37% that described glass dregs body is dissolved in mass percent concentration, constantly stirs, and at 75-95 DEG C of temperature, extraction time is 30-120min, filters, obtains acid extract and the first filter residue.
4. method according to claim 2, is characterized in that, the liquid-solid ratio of hydrochloric acid described in described step S2 and described glass dregs body is 2.5-6mL/g.
5. method according to claim 3, is characterized in that, the described concentration of hydrochloric acid in described step S2 is 32-37%, and described temperature is 85-90 DEG C, and described extraction time is 40-80min.
6. method according to claim 4, is characterized in that, the liquid-solid ratio of the described hydrochloric acid in described step S2 and described glass dregs body is 3.5-4mL/g.
7. method according to claim 1, is characterized in that, the described pH=2.5-3 in described step S3.
8. method according to claim 1, is characterized in that, the described alkali lye in described step S4 is sodium hydroxide.
9. method according to claim 8, is characterized in that, described step S4 is specially:
The sodium hydroxide that mass percent concentration is 9-30% is added in described first filter residue after washing, continuous stirring, at 70-100 DEG C of temperature, extraction time is 20-200min, filter, obtain alkali vat liquor and the second filter residue, and by described second residue washing, filtration, filtrate and described alkali vat liquor are merged and obtains alkali extracting solution.
10. method according to claim 8, is characterized in that, the liquid-solid ratio of sodium hydroxide described in described step S4 and described first filter residue is 3-13mL/g.
11. methods according to claim 9, is characterized in that, the described naoh concentration in described step S4 is 13-21%, and described temperature is 90-95 DEG C, and described extraction time is 40-70min.
12. methods according to claim 10, is characterized in that, the liquid-solid ratio of the described sodium hydroxide in described step S4 and described first filter residue is 6-11mL/g.
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| CN108584971B (en) * | 2018-05-04 | 2020-05-22 | 中国科学院过程工程研究所 | Method for preparing high-modulus soluble silicate by utilizing gasified slag |
| CN111268686B (en) * | 2020-02-08 | 2022-07-01 | 昆明理工大学 | Method for preparing water glass from silicate minerals and water glass |
| CN115504555B (en) * | 2022-09-27 | 2023-09-26 | 齐鲁工业大学 | Coal gas slag-based composite ferric aluminum silicate flocculant and preparation method and application thereof |
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