CN109402398A - A method of chlorine in zinc material of the removal containing chlorine - Google Patents
A method of chlorine in zinc material of the removal containing chlorine Download PDFInfo
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- CN109402398A CN109402398A CN201811429229.1A CN201811429229A CN109402398A CN 109402398 A CN109402398 A CN 109402398A CN 201811429229 A CN201811429229 A CN 201811429229A CN 109402398 A CN109402398 A CN 109402398A
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- zinc
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- chloride
- filter cake
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention belongs to the zinc material processing technology field containing chlorine, the invention discloses a kind of method of chlorine in zinc material of the removal containing chlorine, comprising steps of A, by the zinc material containing chlorine after washing, a filters pressing, obtain filtrate and a filter cake；B, detect the concentration of ammonium chloride in filtrate respectively, in filtrate in chlorination zinc concentration and a filter cake chlorine content；C, filtrate is handled: a filter cake d1, D, a filter cake processing: being executed step A with the zinc material containing chlorine is back to；D2, pressing filtering liquid and filter cake product are obtained after a filter cake is carried out dechlorination processing, secondary filters pressing.The present invention has the characteristics that at low cost, pollution-free, low energy consumption.
Description
Technical field
The invention belongs to the material processing technology fields of zinc containing chlorine, and in particular to a kind of side for removing chlorine in the zinc material containing chlorine
Method.
Background technique
Zinc material source containing chlorine is wider, is mainly derived from the use industry of zinc metallurgy industry and metallic zinc.It is past in zinc metallurgy
It is past to generate dross.The major impurity ingredient of dross is zinc chloride and ammonium chloride.And dross has in zinc metallurgy as waste material
It is removed, the reason is as follows that: 1, dross will affect the content of zinc in the zinc product produced, to influence the quality of zinc；2,
Chlorine in dross can generate serious corrosiveness to equipment, and the impurity in dross, will increase cost, or even can production development
Accident.And the amount of dross is often larger, processing cost is often higher.Therefore, (the nothing in zinc abstraction of the chlorine in the zinc material containing chlorine
By pyrogenic process or wet process), chlorine all has great destructiveness to production, and such material contains a large amount of zinc (to temperature zinc
For ash, content is 60-76% in mass fraction), it still cannot be utilized, cause the significant wastage of resource and environment dirty
Dye.
There are the zinc-plated cigarette ash of steel tube factory, the zinc-plated cigarette ash of steel tower factory, zine-smelting plant in remaining source of zinc material containing chlorine
Dross, (containing chlorine) oxide ore of import etc..The impurity wherein contained also exists mostly in the form of ammonium chloride, zinc chloride, remaining
Impurity is very few.
It the use of more dechlorination equipment is at present multiple hearth furnace and rotary kiln.It also can more thoroughly be removed when operating smooth
Fluorine, chlorine, but the equipment energy consumption is high, and temperature adjusts difficulty, and equipment investment is big, and production capacity is low.Multiple hearth furnace is mostly used to refine in wet process
A small amount of materials of powdered zinc containing chlorine is handled in zinc.Under big treating capacity, not yet discovery application.Therefore, the prior art needs one
The technique of chlorine in lower-cost zinc material of the removal containing chlorine of kind, recycles zinc therein.
Summary of the invention
In order to solve the above problems existing in the present technology, it is an object of that present invention to provide a kind of zinc material of the removal containing chlorine
The method of middle chlorine.
The technical scheme adopted by the invention is as follows:
A method of chlorine in zinc material of the removal containing chlorine, comprising steps of
A, the zinc material containing chlorine is obtained into filtrate and a filter cake after washing, a filters pressing；
B, detect the concentration of ammonium chloride in filtrate respectively, in filtrate in chlorination zinc concentration and a filter cake chlorine content；
The concentration of ammonium chloride in b1, detection filtrate；If the concentration of ammonium chloride is greater than or equal to ammonium chloride concentration standard value
Execute step c1；If the concentration of ammonium chloride thens follow the steps c2 lower than ammonium chloride concentration standard value；
Whether the content of chlorine is greater than or equal to the standard value of chlorine in b2, a detection filter cake；If chlorine in a filter cake
Content is greater than or equal to standard value and thens follow the steps d1；If the content of the chlorine in a filter cake is thened follow the steps lower than standard value
d2；
C, filtrate is handled:
C1, by filtrate by being concentrated by evaporation, after Crystallization Separation, obtain low concentration ammonium chloride and zinc chloride mixed liquor and chlorination
Crystalline ammonium；If chlorination zinc concentration is greater than or equal to zinc oxide concentration standard value in low concentration ammonium chloride and zinc chloride mixed liquor,
Low concentration ammonium chloride and zinc chloride mixed liquor are then obtained into the crystallization of the first zinc chloride and first by being concentrated by evaporation, after Crystallization Separation
Low concentration zinc chloride liquid；If chlorination zinc concentration is lower than zinc oxide concentration standard in low concentration ammonium chloride and zinc chloride mixed liquor
Value, then using the water-washing step of low concentration ammonium chloride and zinc chloride mixed liquor return step A as water lotion；
C2, chlorination zinc concentration in filtrate is detected again；If chlorination zinc concentration is greater than or equal to zinc oxide concentration in filtrate
Filtrate is then obtained the crystallization of the second zinc chloride and the second low concentration zinc chloride liquid by being concentrated by evaporation, after Crystallization Separation by standard value；
D, a filter cake processing:
D1, a filter cake is executed into step A with the zinc material containing chlorine is back to；
D2, pressing filtering liquid and filter cake product are obtained after a filter cake is carried out dechlorination processing, secondary filters pressing.
Further, the specific steps that dechlorination is handled in the step d2 are as follows: by a filter cake and sodium hydroxide and supplement
Pressing filtering liquid and filter cake product are obtained after water hybrid reaction, secondary filters pressing；If the concentration of sodium chloride is greater than or equal to chlorine in pressing filtering liquid
Change na concn standard value, then pressing filtering liquid is obtained into sodium chloride product and low concentration sodium chloride solution after pervaporation, Crystallization Separation；It will
Low concentration sodium chloride solution is back in supplement water and executes step d2；If the concentration of sodium chloride is less than sodium chloride concentration mark in pressing filtering liquid
Pressing filtering liquid is then back in supplement water and executes step d2 by quasi- value.
Further, the step of low concentration ammonium chloride in the step c1 and zinc chloride mixed liquor are concentrated by evaporation uses three
Imitate evaporator；The operating temperature of triple effect evaporator is 60 DEG C -90 DEG C.
Further, evaporation-concentration step uses evaporator to be evaporated concentration in the step c2.
It further, will filter if chlorination zinc concentration is lower than zinc oxide concentration standard value in filtrate in the step c2
The step of water-washing step of liquid return step A is as water lotion.
Further, the step c2 further include using the water-washing step of the second low concentration zinc chloride liquid return step A as
The step of water lotion.
Further, the step c1 further includes making the water-washing step of the zinc chloride liquid return step A of the first low concentration
The step of for water lotion.
Further, the step c1 further includes using the condensed water of triple effect evaporator generation as water lotion return step A
Water-washing step；The step c2 further includes using the condensed water of evaporator as the water-washing step of water lotion return step A.
The invention has the benefit that in a kind of zinc material of removal of the invention containing chlorine chlorine method have it is at low cost,
Pollution-free, the characteristics of low energy consumption；Firstly, present method avoids the following defects of the prior art: existing to be dechlorinated with alkali
Method directly add alkali to be allowed to generate sodium chloride, the disadvantage is that pollution is big, alkali consumption is big, water unit consumption is high, energy consumption is high；Which increase
The usage amount of alkali cannot recycle ammonium chloride and zinc chloride；It is mixed into ammonium chloride and zinc chloride in industrial table salt, reduces salt
Effective component, while generating a large amount of ammonias, environment caused seriously to pollute.The present invention is directed at the existing forms of chlorine
Ammonium chloride and zinc chloride are separated from raw material respectively, are recycled, obtained ammonium chloride, zinc chloride and purer industrial table salt by reason,
While solving pollution, the dosage of alkali is considerably reduced；Zinc chloride and sodium chloride be wash repeatedly make its be enriched with after steam again
Hair is primary, and only evaporation section water, uses more energy-efficient triple effect evaporator in addition, and energy-saving effect is more obvious, in addition of the invention
Finally the zinc mass transfer containing chlorine is carried out at new product using avoiding the wasting of resources；And it is realizing to containing chlorine
Zinc material processing while produce economic benefit, save processing cost.
Detailed description of the invention
Fig. 1 is operating process schematic diagram of the invention.
Specific embodiment
With reference to the accompanying drawing and specific embodiment does further explaination to the present invention.
Embodiment 1
As shown in Figure 1, a method of chlorine in zinc material of the removal containing chlorine, comprising steps of
A, the zinc material containing chlorine is obtained into filtrate and a filter cake after washing, a filters pressing；
B, detect the concentration of ammonium chloride in filtrate respectively, in filtrate in chlorination zinc concentration and a filter cake chlorine content；
The concentration of ammonium chloride in b1, detection filtrate；If the concentration of ammonium chloride is greater than or equal to ammonium chloride concentration standard value
Execute step c1；If the concentration of ammonium chloride thens follow the steps c2 lower than ammonium chloride concentration standard value；
Whether the content of chlorine is greater than or equal to the standard value of chlorine in b2, a detection filter cake；If chlorine in a filter cake
Content is greater than or equal to standard value and thens follow the steps d1；If the content of the chlorine in a filter cake is thened follow the steps lower than standard value
d2；
C, filtrate is handled:
C1, by filtrate by being concentrated by evaporation, after Crystallization Separation, obtain low concentration ammonium chloride and zinc chloride mixed liquor and chlorination
Crystalline ammonium；If chlorination zinc concentration is greater than or equal to zinc oxide concentration standard value in low concentration ammonium chloride and zinc chloride mixed liquor,
Low concentration ammonium chloride and zinc chloride mixed liquor are then obtained into the crystallization of the first zinc chloride and first by being concentrated by evaporation, after Crystallization Separation
Low concentration zinc chloride liquid；If chlorination zinc concentration is lower than zinc oxide concentration standard in low concentration ammonium chloride and zinc chloride mixed liquor
Value, then using the water-washing step of low concentration ammonium chloride and zinc chloride mixed liquor return step A as water lotion；
C2, chlorination zinc concentration in filtrate is detected again；If chlorination zinc concentration is greater than or equal to zinc oxide concentration in filtrate
Filtrate is then obtained the crystallization of the second zinc chloride and the second low concentration zinc chloride liquid by being concentrated by evaporation, after Crystallization Separation by standard value；
D, a filter cake processing:
D1, a filter cake is executed into step A with the zinc material containing chlorine is back to；
D2, pressing filtering liquid and filter cake product are obtained after a filter cake is carried out dechlorination processing, secondary filters pressing.
Zinc material containing chlorine of the invention can for zinc-plated cigarette ash, the zinc-plated cigarette ash of steel tower factory, zine-smelting plant dross or into
(containing chlorine) oxide ore of mouth etc. major impurity ingredient is the material of zinc chloride and ammonium chloride.
Invention processing method of the invention is summarized as follows:
The zinc material containing chlorine is preferably zinc powder material；Chlorine powdered zinc material washing → filters pressing will be contained, obtain filtrate and filter
Cake.When filtrate is few containing chlorine, return is washed again, is dehydrated to obtain ammonium chloride when containing ammonium chloride is greater than the i.e. evaporator of making a gift to someone of specified value
Crystal is sold after drying processing.When washing lotion Containing Zinc Chloride is greater than specified value, also send evaporator, after crystallization processing, sell.Steam
Condensation, condensed water return washing step.It is washed again if filter cake is higher than specified value return containing chlorine, the filter cake of the qualification containing chlorine enters reaction
Alkali, clear water dechlorination is added in slot, and reaction terminates → filters pressing and returns reactive tank when filtrate sodium chloride-containing is low, otherwise → evaporation → drying,
Industrial table salt is obtained, is sold.Filter cake < containing chlorine 0.1%, drying are sold.
Zinc oxide concentration standard value, ammonium chloride concentration standard value and sodium chloride concentration standard value in the present invention are that industry is raw
The value that production. art requires；In general, zinc oxide concentration standard value, ammonium chloride concentration standard value and sodium chloride concentration standard value point
It Di Yu not the respective components corresponding concentration of solubility at a temperature of certain in water.As solubility of the ammonium chloride in 20 DEG C of water is
37.2g/100mL.Then when practical operation, ammonium chloride concentration standard value should be lower than 37.2g/ (100+37.2) g at 20 DEG C.Point
Mother does not consider that there are also zinc chloride in liquid, and the solubility of zinc chloride is very big.During convenient for later crystallization, reduces and steam
The energy consumption that shampoo generates, then zinc oxide concentration standard value, ammonium chloride concentration standard value and sodium chloride concentration standard value cannot be below
The corresponding concentration of corresponding solubility is too many.
Effective dechlorination may be implemented in the present invention, and " dangerous waste product " is made to turn waste into wealth；It is pollution-free, pollution-free enterprise can be built up；
Low production cost；Enterprise personnel is few, and producing 100000 tons of factories without chlorine zinc gray per year only needs 50 workers.
Embodiment 2
As shown in Figure 1, a method of chlorine in zinc material of the removal containing chlorine, comprising steps of
A, the zinc material containing chlorine is obtained into filtrate and a filter cake after washing, a filters pressing；
B, detect the concentration of ammonium chloride in filtrate respectively, in filtrate in chlorination zinc concentration and a filter cake chlorine content；
The concentration of ammonium chloride in b1, detection filtrate；If the concentration of ammonium chloride is greater than or equal to ammonium chloride concentration standard value
Execute step c1；If the concentration of ammonium chloride thens follow the steps c2 lower than ammonium chloride concentration standard value；
Whether the content of chlorine is greater than or equal to the standard value of chlorine in b2, a detection filter cake；If chlorine in a filter cake
Content is greater than or equal to standard value and thens follow the steps d1；If the content of the chlorine in a filter cake is thened follow the steps lower than standard value
d2；
C, filtrate is handled:
C1, by filtrate by being concentrated by evaporation, after Crystallization Separation, obtain low concentration ammonium chloride and zinc chloride mixed liquor and chlorination
Crystalline ammonium；If chlorination zinc concentration is greater than or equal to zinc oxide concentration standard value in low concentration ammonium chloride and zinc chloride mixed liquor,
Low concentration ammonium chloride and zinc chloride mixed liquor are then obtained into the crystallization of the first zinc chloride and first by being concentrated by evaporation, after Crystallization Separation
Low concentration zinc chloride liquid；
C2, chlorination zinc concentration in filtrate is detected again；If chlorination zinc concentration is greater than or equal to zinc oxide concentration standard value,
Filtrate is then obtained into the crystallization of the second zinc chloride and the second low concentration zinc chloride liquid by being concentrated by evaporation, after Crystallization Separation；
D, a filter cake processing:
D1, a filter cake is executed into step A with the zinc material containing chlorine is back to；
D2, pressing filtering liquid and filter cake product are obtained after a filter cake is carried out dechlorination processing, secondary filters pressing.
Zinc material containing chlorine of the invention can for zinc-plated cigarette ash, the zinc-plated cigarette ash of steel tower factory, zine-smelting plant dross or into
(containing chlorine) oxide ore of mouth etc. major impurity ingredient is the material of zinc chloride and ammonium chloride.
Invention processing method of the invention is summarized as follows:
The zinc material containing chlorine is preferably powder；Chlorine powdered zinc material washing → filters pressing will be contained, obtain filtrate and filter cake.
When filtrate is few containing chlorine, return is washed again, is dehydrated to obtain ammonium chloride crystalline substance when containing ammonium chloride is greater than specified value evaporator of making a gift to someone
Body is sold after drying processing.When washing lotion Containing Zinc Chloride is greater than specified value, also send evaporator, after crystallization processing, sell.Steam is cold
Solidifying, condensed water returns washing step.It is washed again if filter cake is higher than specified value return containing chlorine, the filter cake of the qualification containing chlorine enters reaction
Alkali, clear water dechlorination is added in slot, and reaction terminates → filters pressing and returns reactive tank when filtrate sodium chloride-containing is low, otherwise → evaporation → drying,
Industrial table salt is obtained, is sold.Filter cake < containing chlorine 0.1%, drying are sold.
Zinc oxide concentration standard value, ammonium chloride concentration standard value and sodium chloride concentration standard value in the present invention are that industry is raw
The value that production. art requires；In general, zinc oxide concentration standard value, ammonium chloride concentration standard value and sodium chloride concentration standard value point
It Di Yu not the respective components corresponding concentration of solubility at a temperature of certain in water.As solubility of the ammonium chloride in 20 DEG C of water is
37.2g/100mL.Then when practical operation, ammonium chloride concentration standard value should be lower than 37.2g/ (100+37.2) g at 20 DEG C.Point
Mother does not consider that there are also zinc chloride in liquid, and the solubility of zinc chloride is very big.During convenient for later crystallization, reduces and steam
The energy consumption that shampoo generates, then zinc oxide concentration standard value, ammonium chloride concentration standard value and sodium chloride concentration standard value cannot be below
The corresponding concentration of corresponding solubility is too many.
Effective dechlorination may be implemented in the present invention, and " dangerous waste product " is made to turn waste into wealth；It is pollution-free, pollution-free enterprise can be built up；
Low production cost；Enterprise personnel is few, and producing 100000 tons of factories without chlorine zinc gray per year only needs 50 workers.
Further, the specific steps that dechlorination is handled in the step d2 are as follows: by a filter cake and sodium hydroxide and supplement
Pressing filtering liquid and filter cake product are obtained after water hybrid reaction, secondary filters pressing；If the concentration of sodium chloride is greater than or equal to chlorine in pressing filtering liquid
Change na concn standard value, then pressing filtering liquid is obtained into sodium chloride product and low concentration sodium chloride solution after pervaporation, Crystallization Separation；It will
Low concentration sodium chloride solution is back in supplement water and executes step d2；If the concentration of sodium chloride is less than sodium chloride concentration mark in pressing filtering liquid
Pressing filtering liquid is then back in supplement water and executes step d2 by quasi- value.
Further, the step of low concentration ammonium chloride in the step c1 and zinc chloride mixed liquor are concentrated by evaporation uses three
Imitate evaporator；The operating temperature of triple effect evaporator is 60 DEG C -90 DEG C.
For more energy conservation, low concentration ammonium chloride and zinc chloride mixed liquor in the consumption step c1 of energy are reduced
The step of evaporation and concentration, uses triple effect evaporator, it is preferred that the operating temperature of triple effect evaporator is 60 DEG C -90 DEG C.
Further, evaporation-concentration step uses evaporator to be evaporated concentration in the step c2.
Embodiment 3
As shown in Figure 1, a method of chlorine in zinc material of the removal containing chlorine, comprising steps of
A, the zinc material containing chlorine is obtained into filtrate and a filter cake after washing, a filters pressing；
B, detect the concentration of ammonium chloride in filtrate respectively, in filtrate in chlorination zinc concentration and a filter cake chlorine content；
The concentration of ammonium chloride in b1, detection filtrate；If the concentration of ammonium chloride is greater than or equal to ammonium chloride concentration standard value
Execute step c1；If the concentration of ammonium chloride thens follow the steps c2 lower than ammonium chloride concentration standard value；
Whether the content of chlorine is greater than or equal to the standard value of chlorine in b2, a detection filter cake；If chlorine in a filter cake
Content is greater than or equal to standard value and thens follow the steps d1；If the content of the chlorine in a filter cake is thened follow the steps lower than standard value
d2；
C, filtrate is handled:
C1, by filtrate by being concentrated by evaporation, after Crystallization Separation, obtain low concentration ammonium chloride and zinc chloride mixed liquor and chlorination
Crystalline ammonium；If chlorination zinc concentration is greater than or equal to zinc oxide concentration standard value in low concentration ammonium chloride and zinc chloride mixed liquor,
Low concentration ammonium chloride and zinc chloride mixed liquor are then obtained into the crystallization of the first zinc chloride and first by being concentrated by evaporation, after Crystallization Separation
Low concentration zinc chloride liquid；
C2, chlorination zinc concentration in filtrate is detected again；If chlorination zinc concentration is greater than or equal to zinc oxide concentration standard value,
Filtrate is then obtained into the crystallization of the second zinc chloride and the second low concentration zinc chloride liquid by being concentrated by evaporation, after Crystallization Separation；
D, a filter cake processing:
D1, a filter cake is executed into step A with the zinc material containing chlorine is back to；
D2, pressing filtering liquid and filter cake product are obtained after a filter cake is carried out dechlorination processing, secondary filters pressing.
Zinc material containing chlorine of the invention can for zinc-plated cigarette ash, the zinc-plated cigarette ash of steel tower factory, zine-smelting plant dross or into
(containing chlorine) oxide ore of mouth etc. major impurity ingredient is the material of zinc chloride and ammonium chloride.
Invention processing method of the invention is summarized as follows:
The zinc material containing chlorine is preferably powder；Chlorine powdered zinc material washing → filters pressing will be contained, obtain filtrate and filter cake.
When filtrate is few containing chlorine, return is washed again, is dehydrated to obtain ammonium chloride crystalline substance when containing ammonium chloride is greater than specified value evaporator of making a gift to someone
Body is sold after drying processing.When washing lotion Containing Zinc Chloride is greater than specified value, also send evaporator, after crystallization processing, sell.Steam is cold
Solidifying, condensed water returns washing step.It is washed again if filter cake is higher than specified value return containing chlorine, the filter cake of the qualification containing chlorine enters reaction
Alkali, clear water dechlorination is added in slot, and reaction terminates → filters pressing and returns reactive tank when filtrate sodium chloride-containing is low, otherwise → evaporation → drying,
Industrial table salt is obtained, is sold.Filter cake < containing chlorine 0.1%, drying are sold.
Zinc oxide concentration standard value, ammonium chloride concentration standard value and sodium chloride concentration standard value in the present invention are that industry is raw
The value that production. art requires；In general, zinc oxide concentration standard value, ammonium chloride concentration standard value and sodium chloride concentration standard value point
It Di Yu not the respective components corresponding concentration of solubility at a temperature of certain in water.As solubility of the ammonium chloride in 20 DEG C of water is
37.2g/100mL.Then when practical operation, ammonium chloride concentration standard value should be lower than 37.2g/ (100+37.2) g at 20 DEG C.Point
Mother does not consider that there are also zinc chloride in liquid, and the solubility of zinc chloride is very big.During convenient for later crystallization, reduces and steam
The energy consumption that shampoo generates, then zinc oxide concentration standard value, ammonium chloride concentration standard value and sodium chloride concentration standard value cannot be below
The corresponding concentration of corresponding solubility is too many.
Effective dechlorination may be implemented in the present invention, and " dangerous waste product " is made to turn waste into wealth；It is pollution-free, pollution-free enterprise can be built up；
Low production cost；Enterprise personnel is few, and producing 100000 tons of factories without chlorine zinc gray per year only needs 50 workers.
Further, the specific steps that dechlorination is handled in the step d2 are as follows: by a filter cake and sodium hydroxide and supplement
Pressing filtering liquid and filter cake product are obtained after water hybrid reaction, secondary filters pressing；If the concentration of sodium chloride is greater than or equal to chlorine in pressing filtering liquid
Change na concn standard value, then pressing filtering liquid is obtained into sodium chloride product and low concentration sodium chloride solution after pervaporation, Crystallization Separation；It will
Low concentration sodium chloride solution is back in supplement water and executes step d2；If the concentration of sodium chloride is less than sodium chloride concentration mark in pressing filtering liquid
Pressing filtering liquid is then back in supplement water and executes step d2 by quasi- value.
Further, the step of low concentration ammonium chloride in the step c1 and zinc chloride mixed liquor are concentrated by evaporation uses three
Imitate evaporator；The operating temperature of triple effect evaporator is 60 DEG C -90 DEG C.
For more energy conservation, low concentration ammonium chloride and zinc chloride mixed liquor in the consumption step c1 of energy are reduced
The step of evaporation and concentration, uses triple effect evaporator, it is preferred that the operating temperature of triple effect evaporator is 60 DEG C -90 DEG C.
Further, evaporation-concentration step uses evaporator to be evaporated concentration in the step c2.
It further, will filter if chlorination zinc concentration is lower than zinc oxide concentration standard value in filtrate in the step c2
The step of water-washing step of liquid return step A is as water lotion.
Further, the step c2 further include using the water-washing step of the second low concentration zinc chloride liquid return step A as
The step of water lotion.
Further, the step c1 further includes making the water-washing step of the zinc chloride liquid return step A of the first low concentration
The step of for water lotion.
Further, the step c1 further includes using the condensed water of triple effect evaporator generation as water lotion return step A
Water-washing step；The step c2 further includes using the condensed water of evaporator as the water-washing step of water lotion return step A.
Preferably, the water that steam condensation generates in evaporator is also finally mixed into water-washing step to be used for washing.At this point,
The steam condensate (SC) of water and evaporator that each crystallisation step of water scouring water returns mixes, the low concentration zinc chloride in the former
Its saturated concentration 37.2g/100mL water (when operation temperature is 20 DEG C) at 20 DEG C of the ammonium chloride concentration system of liquid, Hou Zhewei
How much pure water, the mixed concentration of the two depend on respective amount, but are lower than 37.2g/100mL water certainly.According to material composition
Table, it is assumed that contain NH in 100g raw material4The amount of Cl is 12.59%, if dissolution 98%, will make the NH of water lotion4Cl concentration rises
2.47g/100mL water, if the upper limit of water lotion containing ammonium chloride concentration is 33g/100mL water, then washable 7 re-evaporations are primary
(water lotion contains NH at this time4Cl 32.29g/100mL water) evaporated water of triple effect evaporator can be preferred, it is set to 35% here,
Then it is again by NH after triple effect evaporator evaporated water4Cl concentration is 49.68g/100mL water, saturation degree when higher than 20 DEG C
37.2g/100mL water, the saturated concentration for the ammonium chloride that is put into crystallizing pond when can crystallize to the temperature.Method removal to be washed with water
The impurity ammonium chloride of the overwhelming majority, while the operation by carrying out flush distillation after repeatedly washing, save the energy of evaporation water
Amount consumption, while improving the quality of product.
The present invention is not limited to above-mentioned optional embodiment, anyone can show that other are each under the inspiration of the present invention
The product of kind form.Above-mentioned specific embodiment should not be understood the limitation of pairs of protection scope of the present invention, protection of the invention
Range should be subject to be defined in claims, and specification can be used for interpreting the claims.
Claims (8)
1. a kind of method of chlorine in zinc material of the removal containing chlorine, it is characterised in that: comprising steps of
A, the zinc material containing chlorine is obtained into filtrate and a filter cake after washing, a filters pressing；
B, detect the concentration of ammonium chloride in filtrate respectively, in filtrate in chlorination zinc concentration and a filter cake chlorine content；
The concentration of ammonium chloride in b1, detection filtrate；It is executed if the concentration of ammonium chloride is greater than or equal to ammonium chloride concentration standard value
Step c1；If the concentration of ammonium chloride thens follow the steps c2 lower than ammonium chloride concentration standard value；
Whether the content of chlorine is greater than or equal to the standard value of chlorine in b2, a detection filter cake；If the content of the chlorine in a filter cake
D1 is thened follow the steps greater than or equal to standard value；If the content of the chlorine in a filter cake thens follow the steps d2 lower than standard value；
C, filtrate is handled:
C1, by filtrate by being concentrated by evaporation, after Crystallization Separation, obtain low concentration ammonium chloride and zinc chloride mixed liquor and ammonium chloride knot
It is brilliant；It, will if chlorination zinc concentration is greater than or equal to zinc oxide concentration standard value in low concentration ammonium chloride and zinc chloride mixed liquor
Low concentration ammonium chloride and zinc chloride mixed liquor obtain the first zinc chloride crystallization and first low dense by being concentrated by evaporation, after Crystallization Separation
Spend zinc chloride liquid；If chlorination zinc concentration is lower than zinc oxide concentration standard value in low concentration ammonium chloride and zinc chloride mixed liquor,
Using the water-washing step of low concentration ammonium chloride and zinc chloride mixed liquor return step A as water lotion；
C2, chlorination zinc concentration in filtrate is detected again；If chlorination zinc concentration is greater than or equal to zinc oxide concentration standard in filtrate
Filtrate is then obtained the crystallization of the second zinc chloride and the second low concentration zinc chloride liquid by being concentrated by evaporation, after Crystallization Separation by value；
D, a filter cake processing:
D1, a filter cake is executed into step A with the zinc material containing chlorine is back to；
D2, pressing filtering liquid and filter cake product are obtained after a filter cake is carried out dechlorination processing, secondary filters pressing.
2. the method for chlorine in a kind of zinc material of the removal containing chlorine according to claim 1, it is characterised in that: the step d2
The specific steps of middle dechlorination processing are as follows: will be pressed after a filter cake and sodium hydroxide and supplement water hybrid reaction, secondary filters pressing
Filtrate and filter cake product；If the concentration of sodium chloride is greater than or equal to sodium chloride concentration standard value in pressing filtering liquid, pressing filtering liquid is passed through
Sodium chloride product and low concentration sodium chloride solution are obtained after pervaporation, Crystallization Separation；Low concentration sodium chloride solution is back to supplement water
Middle execution step d2；If the concentration of sodium chloride is less than sodium chloride concentration standard value in pressing filtering liquid, pressing filtering liquid is back to supplement
Step d2 is executed in water.
3. the method for chlorine in a kind of zinc material of the removal containing chlorine according to claim 2, it is characterised in that: the step c1
In low concentration ammonium chloride and zinc chloride mixed liquor be concentrated by evaporation the step of use triple effect evaporator；The work temperature of triple effect evaporator
Degree is 60 DEG C -90 DEG C.
4. the method for chlorine in a kind of zinc material of the removal containing chlorine according to claim 3, it is characterised in that: the step c2
Middle evaporation-concentration step is evaporated concentration using evaporator.
5. the method for chlorine in a kind of zinc material of the removal containing chlorine according to claim 4, it is characterised in that: the step c2
If chlorination zinc concentration is lower than zinc oxide concentration standard value in filtrate in, using the water-washing step of filtrate return step A as water
The step of washing lotion.
6. the method for chlorine in a kind of zinc material of the removal containing chlorine according to claim 5, it is characterised in that: the step c2
Further include the steps that using the water-washing step of the second low concentration zinc chloride liquid return step A as water lotion.
7. the method for chlorine in a kind of zinc material of the removal containing chlorine according to claim 6, it is characterised in that: the step c1
Further include the steps that using the water-washing step of the zinc chloride liquid return step A of the first low concentration as water lotion.
8. the method for chlorine in a kind of zinc material of the removal containing chlorine according to claim 7, it is characterised in that: the step c1
It further include using the condensed water of triple effect evaporator generation as the water-washing step of water lotion return step A；The step c2 further includes
Using the condensed water of evaporator as the water-washing step of water lotion return step A.
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