CN104129811A - Process for preparing zinc sulfate - Google Patents
Process for preparing zinc sulfate Download PDFInfo
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- CN104129811A CN104129811A CN201410397482.9A CN201410397482A CN104129811A CN 104129811 A CN104129811 A CN 104129811A CN 201410397482 A CN201410397482 A CN 201410397482A CN 104129811 A CN104129811 A CN 104129811A
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- zinc sulfate
- solution
- zinc
- preparing
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Abstract
The invention provides a process for preparing zinc sulfate and the process is simple in step, low in energy consumption, high in production efficiency and high in product purity. The process comprises the following steps: putting secondary zinc oxide and zinc oxide in waste residues produced in zinc preparation in a raw material tank filled with dilute sulfuric acid, reacting to generate a zinc sulfate solution, guiding the zinc sulfate solution into a reaction tank, removing impurities such as iron, cobalt and copper in the reaction tank, filtering the impurities through a filtering machine, guiding the zinc sulfate solution into a storage tank for precipitation, evaporating the zinc sulfate solution in an evaporator to obtain a concentrated solution, crystallizing in a crystallizing tank, carrying out crystal separation in a centrifugal machine, cooling to obtain zinc sulfate containing crystal water and drying in a dryer to obtain the zinc sulfate. According to the process, the zinc sulfate solution is concentrated in the way of pouring hot oil and circularly heating, so that the heating temperature is higher, the heating material can be recycled, the energy consumption is little and the cost is reduced. The process for preparing the zinc sulfate is simple and clear in processing step, energy-saving, friendly to the environment and convenient to operate.
Description
Technical field
The present invention relates to a kind of production technique of industrial chemicals, relate in particular to a kind of technique of preparing zinc sulfate.
Background technology
As everyone knows, while preparing zinc sulfate, must be through the process of evaporative crystallization, evaporative crystallization is by evaporating solvent, makes solution become saturatedly from unsaturated, continues evaporation, superfluous solute will be the process that crystal is separated out.But in prior art, all adopt common evaporation equipment and technique, utilize transpiring moisture, the mode of crystallisation by cooling obtains aqueous sulfuric acid zinc or Zincomed, and at present these evaporative crystallization techniques that adopt all exist complex steps, high, the shortcoming such as production efficiency is low, zinc sulfate purity is not high consumes energy.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of step simple, low power consuming, production efficiency high and preparation after the high technique of preparing zinc sulfate of purity, its technique is: by the secondary zinc oxide of preparing in the waste residue that zinc produces, zinc oxide, be placed in feed reservoir, in feed reservoir, be marked with dilute sulphuric acid, make its reaction generate solution of zinc sulfate, again solution of zinc sulfate is imported in reaction tank, in reaction tank, remove the iron in zinc sulfate solution, bore, the impurity such as copper, by filter, inciting somebody to action wherein contaminant filter falls, the solution of zinc sulfate that has removed impurity is imported in hold-up vessel and carries out precipitation process, and carry out thermal pretreatment, be preheated to 75 °-90 °, solution of zinc sulfate after thermal pretreatment is delivered in vaporizer and evaporated, obtain concentrated solution, by liquid after concentration, in crystallizer tank, carry out crystallization treatment, concentrated solution after crystallization treatment is sent into together with the water vapour producing in evaporative process and in whizzer, carried out Crystallization Separation, after cooling, obtain the zinc sulfate containing crystal water, by the zinc sulfate containing crystal water, be placed in moisture eliminator and carry out drying treatment, thereby obtain zinc sulfate, by it
Products obtained therefrom is packed processing on wrapping machine.
Solution of zinc sulfate after described thermal pretreatment is delivered in vaporizer and is evaporated, and obtains the process of concentrated solution, adopts the type of heating of falling hot oiling.
Beneficial effect of the present invention is: adopt the type of heating of falling hot oiling to carry out concentration to solution of zinc sulfate, Heating temperature is higher, easier Artificial Control, has improved purifying velocity greatly, and heating material can recycle, reduce energy consumption, reduced cost, it is simple and clear that the present invention prepares the processing step of zinc sulfate, energy-conserving and environment-protective, waste water resource not, convenient operation.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the present invention is described in further detail;
As shown in Figure 1, a kind of technique of preparing zinc sulfate, its technique is: by the secondary zinc oxide of preparing in the waste residue that zinc produces, zinc oxide, be placed in feed reservoir, in feed reservoir, be marked with dilute sulphuric acid, make its reaction generate solution of zinc sulfate, again solution of zinc sulfate is imported in reaction tank, in reaction tank, remove the iron in zinc sulfate solution, bore, the impurity such as copper, by filter, inciting somebody to action wherein contaminant filter falls, the solution of zinc sulfate that has removed impurity is imported in hold-up vessel and carries out precipitation process, and carry out thermal pretreatment, be preheated to 75 °-90 °, solution of zinc sulfate after thermal pretreatment is delivered in vaporizer and evaporated, obtain concentrated solution, by liquid after concentration, in crystallizer tank, carry out crystallization treatment, concentrated solution after crystallization treatment is sent into together with the water vapour producing in evaporative process and in whizzer, carried out Crystallization Separation, after cooling, obtain the zinc sulfate containing crystal water, by the zinc sulfate containing crystal water, be placed in moisture eliminator and carry out drying treatment, thereby obtain zinc sulfate, its products obtained therefrom is packed to processing on wrapping machine, solution of zinc sulfate after thermal pretreatment is delivered in vaporizer
Evaporate, obtain the process of concentrated solution, adopt the type of heating of falling hot oiling.
Adopt the type of heating of falling hot oiling to carry out concentration to solution of zinc sulfate, Heating temperature is higher, easier Artificial Control, has improved purifying velocity greatly, and heating material can recycle, reduce energy consumption, reduced cost, it is simple and clear that the present invention prepares the processing step of zinc sulfate, energy-conserving and environment-protective, waste water resource not, convenient operation.
Claims (2)
1. a technique of preparing zinc sulfate, its technique is: by the secondary zinc oxide of preparing in the waste residue that zinc produces, zinc oxide, be placed in feed reservoir, in feed reservoir, be marked with dilute sulphuric acid, make its reaction generate solution of zinc sulfate, again solution of zinc sulfate is imported in reaction tank, in reaction tank, remove the iron in zinc sulfate solution, bore, the impurity such as copper, by filter, inciting somebody to action wherein contaminant filter falls, the solution of zinc sulfate that has removed impurity is imported in hold-up vessel and carries out precipitation process, and carry out thermal pretreatment, be preheated to 75 °-90 °, solution of zinc sulfate after thermal pretreatment is delivered in vaporizer and evaporated, obtain concentrated solution, by liquid after concentration, in crystallizer tank, carry out crystallization treatment, concentrated solution after crystallization treatment is sent into together with the water vapour producing in evaporative process and in whizzer, carried out Crystallization Separation, after cooling, obtain the zinc sulfate containing crystal water, by the zinc sulfate containing crystal water, be placed in moisture eliminator and carry out drying treatment, thereby obtain zinc sulfate, its products obtained therefrom is packed to processing on wrapping machine.
2. a kind of technique of preparing zinc sulfate according to claim 1, it is characterized in that solution of zinc sulfate after described thermal pretreatment is delivered in vaporizer evaporates, and obtains the process of concentrated solution, adopts the type of heating of falling hot oiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410397482.9A CN104129811A (en) | 2014-08-14 | 2014-08-14 | Process for preparing zinc sulfate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410397482.9A CN104129811A (en) | 2014-08-14 | 2014-08-14 | Process for preparing zinc sulfate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104129811A true CN104129811A (en) | 2014-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410397482.9A Pending CN104129811A (en) | 2014-08-14 | 2014-08-14 | Process for preparing zinc sulfate |
Country Status (1)
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| CN (1) | CN104129811A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556205A (en) * | 2014-12-31 | 2015-04-29 | 袁福堂 | Technical method for producing feed-grade zinc sulfate in environment-friendly manner by electrolytic zinc slag |
| CN108163885A (en) * | 2018-02-05 | 2018-06-15 | 杨金国 | A kind of waste tyre pyrolytic carbon black prepares the method and device of zinc sulfate |
| CN110156067A (en) * | 2019-05-14 | 2019-08-23 | 惠纯科技(浙江)有限公司 | A kind of preparation method of bulky grain zinc sulfate |
| CN115382241A (en) * | 2022-08-15 | 2022-11-25 | 衡阳百赛化工实业有限公司 | Zinc sulfate evaporation crystallization drying equipment |
-
2014
- 2014-08-14 CN CN201410397482.9A patent/CN104129811A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556205A (en) * | 2014-12-31 | 2015-04-29 | 袁福堂 | Technical method for producing feed-grade zinc sulfate in environment-friendly manner by electrolytic zinc slag |
| CN108163885A (en) * | 2018-02-05 | 2018-06-15 | 杨金国 | A kind of waste tyre pyrolytic carbon black prepares the method and device of zinc sulfate |
| CN110156067A (en) * | 2019-05-14 | 2019-08-23 | 惠纯科技(浙江)有限公司 | A kind of preparation method of bulky grain zinc sulfate |
| CN115382241A (en) * | 2022-08-15 | 2022-11-25 | 衡阳百赛化工实业有限公司 | Zinc sulfate evaporation crystallization drying equipment |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141105 |