CN101983916B - Method for production of calcium chlorate and coproduction of ultra-fine calcium carbonate and sodium chloride by using acetylene sludge - Google Patents

Method for production of calcium chlorate and coproduction of ultra-fine calcium carbonate and sodium chloride by using acetylene sludge Download PDF

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CN101983916B
CN101983916B CN2010101690720A CN201010169072A CN101983916B CN 101983916 B CN101983916 B CN 101983916B CN 2010101690720 A CN2010101690720 A CN 2010101690720A CN 201010169072 A CN201010169072 A CN 201010169072A CN 101983916 B CN101983916 B CN 101983916B
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calcium
chlor
sodium
chlorate
carbide slag
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CN101983916A (en
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王嘉兴
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RUGAO YONGXING CASING CO Ltd
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汪晋强
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Abstract

The invention discloses a method for production of calcium chlorate and coproduction of ultra-fine calcium carbonate and sodium chloride by using acetylene sludge, which comprises the following steps: generating reaction products containing the calcium chlorate and calcium chloride by leading calcium hydroxide in chlor-alkali acetylene sludge to be reacted with chlorine gas; filtering the reaction products, removing impurities, reducing temperature, settling, then precipitating calcium chlorate solids, further filtering, and obtaining the calcium chlorate solids and calcium chloride filtrate; and carrying out treatment on the calcium chloride filtrate by using a surfactant, then being reacted with sodium carbonate in a corrosion-resistant reactor, obtaining calcium carbonate precipitate and sodium chloride mixed solution, filtering and separating the calcium carbonate and the sodium chloride.

Description

A kind of method of producing calcium chlorate co-producing ultra-fine lime carbonate and sodium-chlor with carbide slag
Technical field
The present invention relates to chlor-alkali carbide slag comprehensive utilization field, particularly, relate to a kind of method of producing calcium chlorate co-producing ultra-fine lime carbonate and sodium-chlor with carbide slag.
Background technology
The waste residue that carbide slag produces when being calcium carbide production acetylene, staple is Ca (OH) 2, also contain small amount of Fe 2O 3, SiO 2And Al 2O 3Oxide compound, oxyhydroxide and a small amount of organism on metal.Carbide slag is the important channel that utilizes carbide slag in a large number as cement producting material, has not only solved carbide slag exhaust emission problem of environment, has realized the comprehensive cyclic utilization of resource, has also practiced thrift limestone resource simultaneously, has also reduced emission amount of carbon dioxide.Yet along with the industrialized development of China, the carbide slag YO enlarges day by day.Press knowhow, 1 ton of polyvinyl chloride product of every production will be discharged about 20 tons of carbide slag slurries.The carbide slag water ratio reaches 40%~50%, is starchiness, and easy to leak pollutes the road surface in transit, and long-term accumulation not only takies a large amount of soils, and there is serious erosion action in the soil.Want to tackle the problem at its root, have only and seek technically to break through, seek new improvement technology, comprehensive utilization turns harm into good, and turns waste into wealth.
Summary of the invention
To the problems referred to above; The invention provides a kind of method of producing calcium chlorate co-producing ultra-fine lime carbonate and sodium-chlor with carbide slag; This method is utilized the calcium hydroxide in the chlor-alkali carbide slag, has generated calcium chlorate and coproduction Potcrate and calcium chloride, for Comprehensive Utilization for Carbide Slag provides new approach.
The present invention realizes through following technical scheme: a kind of method of producing calcium chlorate co-producing ultra-fine lime carbonate and sodium-chlor with carbide slag comprises the steps:
A: the chlor-alkali carbide slag is dropped into ashing pond (1), and water reconciles into emulsion, and makes the content of calcium hydroxide reach 120g/L;
B: steps A gained carbide slag is delivered to chlorination tower (2), simultaneously, according to calcium hydroxide and chlorine pure substance mass ratio be 1: 0.70~1.16 in chlorination tower (2) input chlorine, carry out chlorination reaction, obtain the reaction product of chloracid calcium and calcium chloride;
C: step B gained reaction product is filtered with first strainer (4), remove solid impurity, filtrating is filtered through second strainer (6) after slurry tank (5) cooling sedimentation again, obtains calcium chlorate solid and the filtrating that contains calcium chloride;
D: the calcium chlorate solid obtains calcium chlorate product (13) through the oven dry down of oven drying at low temperature machine (7) low temperature;
E: the calcium chloride that step C obtains is filtrated with 4~8% surfactant treatment, and stir speed (S.S.) is 200~320r/min;
F: the filtrating of the calcium chloride after the surfactant treatment of step e gained is dropped in the corrosion-resistant reactor (8); Mass ratio 1: 0.66~0.95 according to calcium chloride and yellow soda ash pure substance drops into yellow soda ash simultaneously; Carry out chemical reaction, obtain the mixture of ZG 301 and sodium-chlor;
G: just the mixture of the ZG 301 of step F gained and sodium-chlor filters through the 3rd strainer (9), obtains white filter cake and clarifying sodium-chlor filtrating (14);
H: white filter cake obtains light calcium carbonate finished product (15) through washing whizzer (10) washing, dry, kibbler (12) pulverizing of drying machine (11);
I: clarifying sodium-chlor filtrating is returned the chlor-alkali workshop and is recycled.
Among the step B, the control chlorination reaction temperature keeps reaction soln not seethe with excitement.
Among the step B, show reaction end, when the indicator of chlorination table (3) is fixed, show that solution no longer absorbs chlorine, reach degree of depth chlorination, be chlorination and finish with chlorination table (3).
Among the step C, slurry tank cools to 60 ℃ promptly has the sedimentation of solid calcium chlorate, and 1~2 hour begins to filter after settling temperature reaches normal temperature.
Said tensio-active agent is selected from emulsifiable concentrate, tween 80 and the mixture of the two.
The chemical equation of aforesaid method is:
6Ca(OH) 2+6Cl 2===Ca(ClO 3) 2+5CaCl 2+6H 2O
CaCl 2+Na 2CO 3===CaCO 3+2NaCl
Beneficial effect of the present invention is: method of producing calcium chlorate co-producing ultra-fine lime carbonate and sodium-chlor with carbide slag of the present invention; Make full use of the calcium hydroxide in the chlor-alkali carbide slag, generated calcium chlorate coproduction light calcium carbonate and sodium-chlor, for Comprehensive Utilization for Carbide Slag provides new approach; This method can be accomplished through reaction for several times and filtration; Operation steps is simple, and facility investment is lower, is a cost-effective method of ten minutes.
Description of drawings
Fig. 1 showed and of the present inventionly produced the technical process of the method for calcium chlorate co-producing ultra-fine lime carbonate and sodium-chlor with carbide slag, wherein:
(1) ashing pond, (2) chlorination tower, (3) chlorination table, (4) first strainers, (5) slurry tank,
(6) second strainers, (7) oven drying at low temperature machine, (8) corrosion-resistant reactor, (9) the 3rd strainers,
(10) washing whizzer, (11) drying machine, (12) kibbler, (13) calcium chlorate product,
(14) sodium-chlor filtrating, (15) lime carbonate finished product.
Embodiment
Describedly for a better understanding of the present invention produce the essence of the method for calcium chlorate co-producing ultra-fine lime carbonate and sodium-chlor, below will combine specific embodiment that the present invention is done further description and explanation with carbide slag.
Embodiment 1
A kind of method of producing calcium chlorate coproduction fine calcium carbonate and sodium-chlor with carbide slag comprises the steps:
A: the chlor-alkali carbide slag that will contain 100kg calcium hydroxide drops into ashing pond (1), and water reconciles into emulsion, and makes the content of calcium hydroxide reach every liter 120 gram;
B: steps A gained carbide slag is delivered to chlorination tower (2) with first pressure pump; Simultaneously; Input chlorine in chlorination tower (2), making calcium hydroxide and chlorine pure substance mass ratio is to carry out chlorination reaction at 1: 1.16, controls chlorination reaction temperature; Keep reaction soln not seethe with excitement, chlorination reaction generates the reaction product of chloracid calcium and calcium chloride; Show reaction end with chlorination table (3), when the indicator of chlorination table (3) is fixed, show that solution no longer absorbs chlorine, reach degree of depth chlorination, be chlorination and finish;
C: step B gained liquid reacting product is filtered with first strainer (4), remove solid impurity, filtrating is filtered through second strainer (6) after slurry tank (5) cooling sedimentation again, obtains calcium chlorate solid and calcium chloride filtrating;
D: the calcium chlorate solid obtains calcium chlorate product (13) through the oven dry down of oven drying at low temperature machine (7) low temperature;
E: the calcium chloride filtrating use mass concentration that step C is obtained is that 4% tensio-active agent emulsifiable concentrate is handled, and stir speed (S.S.) is 200r/min;
F: the filtrating of the calcium chloride after the surfactant treatment of step e gained is dropped in the corrosion-resistant reactor (8), and the mass ratio 0.95 according to calcium chloride and yellow soda ash pure substance drops into yellow soda ash simultaneously, carries out chemical reaction, generates lime carbonate and sodium-chlor mixing solutions;
G: lime carbonate and sodium-chlor mixing solutions are filtered through the 3rd strainer (9), obtain white filter cake and clarifying sodium-chlor filtrating (14);
H: white filter cake obtains light calcium carbonate finished product (15) through washing whizzer (10) washing, dry, kibbler (12) pulverizing of drying machine (11);
I: clarifying sodium-chlor filtrating is returned the chlor-alkali workshop and is recycled.
Embodiment 2
A kind of method of producing calcium chlorate co-producing ultra-fine lime carbonate and sodium-chlor with carbide slag comprises the steps:
A: the chlor-alkali carbide slag that will contain 100kg calcium hydroxide drops into ashing pond (1), and water reconciles into emulsion, and makes the content of calcium hydroxide reach every liter 120 gram;
B: deliver to chlorination tower (2) with first pressure pump; Simultaneously; Input chlorine in chlorination tower (2), making calcium hydroxide and chlorine pure substance mass ratio is to carry out chlorination reaction at 1: 0.76, controls chlorination reaction temperature; Keep reaction soln not seethe with excitement, chlorination reaction generates the reaction product of chloracid calcium and calcium chloride; Show reaction end with chlorination table (3), when the indicator of chlorination table (3) is fixed, show that solution no longer absorbs chlorine, reach degree of depth chlorination, be chlorination and finish;
C: step B gained liquid reacting product is filtered with first strainer (4), remove solid impurity, filtrating is filtered through second strainer (6) after slurry tank (5) cooling sedimentation again, obtains calcium chlorate solid and calcium chloride filtrating;
D: the calcium chlorate solid obtains calcium chlorate product (13) through the oven dry down of oven drying at low temperature machine (7) low temperature;
E: it is 8% surfactant treatment that the calcium chloride filtrating that step C is obtained is used mass concentration, and wherein to contain mass concentration be that 4% emulsifiable concentrate and mass concentration are 2% tween 80 to tensio-active agent, and stir speed (S.S.) is 250r/min;
F: the filtrating of the calcium chloride after the surfactant treatment of step e gained is dropped in the corrosion-resistant reactor (8); Mass ratio according to calcium chloride and yellow soda ash pure substance drops into yellow soda ash at 1: 0.66 simultaneously; Carry out chemical reaction, generate lime carbonate and sodium-chlor mixing solutions;
G: lime carbonate and sodium-chlor mixing solutions are filtered through the 3rd strainer (9), obtain white filter cake and clarifying sodium-chlor filtrating (14);
H: white filter cake obtains light calcium carbonate finished product (15) through washing whizzer (10) washing, dry, kibbler (12) pulverizing of drying machine (11);
I: clarifying sodium-chlor filtrating is returned the chlor-alkali workshop and is recycled.
Embodiment 3
A kind of method of producing calcium chlorate co-producing ultra-fine lime carbonate and sodium-chlor with carbide slag comprises the steps:
A: the chlor-alkali carbide slag that will contain 100kg calcium hydroxide drops into ashing pond (1), and water reconciles into emulsion, and makes the content of calcium hydroxide reach every liter 120 gram;
B: deliver to chlorination tower (2) with first pressure pump; Simultaneously; Input chlorine in chlorination tower (2), making calcium hydroxide and chlorine pure substance mass ratio is to carry out chlorination reaction at 1: 1.00, controls chlorination reaction temperature; Keep reaction soln not seethe with excitement, chlorination reaction generates the reaction product of chloracid calcium and calcium chloride; Show reaction end with chlorination table (3), when the indicator of chlorination table (3) is fixed, show that solution no longer absorbs chlorine, reach degree of depth chlorination, be chlorination and finish;
C: step B gained liquid reacting product is filtered with first strainer (4), remove solid impurity, filtrating is filtered through second strainer (6) after slurry tank (5) cooling sedimentation again, obtains calcium chlorate solid and calcium chloride filtrating;
D: the calcium chlorate solid obtains calcium chlorate product (13) through the oven dry down of oven drying at low temperature machine (7) low temperature;
E: it is that 8% tensio-active agent tween 80 is handled that the calcium chloride filtrating that step C is obtained is used mass concentration, and stir speed (S.S.) is 320r/min;
F: the filtrating of the calcium chloride after the surfactant treatment of step e gained is dropped in the corrosion-resistant reactor (8); Mass ratio according to calcium chloride and yellow soda ash pure substance drops into yellow soda ash at 1: 0.86 simultaneously; Carry out chemical reaction, generate lime carbonate and sodium-chlor mixing solutions;
G: lime carbonate and sodium-chlor mixing solutions are filtered through the 3rd strainer (9), obtain white filter cake and clarifying sodium-chlor filtrating (14);
H: white filter cake obtains light calcium carbonate finished product (15) through washing whizzer (10) washing, dry, kibbler (12) pulverizing of drying machine (11);
I: clarifying sodium-chlor filtrating is returned the chlor-alkali workshop and is recycled.
The foregoing description is preferred embodiment of the present invention, is not to be used for limiting practical range of the present invention, so all equivalences of being done with described characteristic of claim of the present invention and principle change or modify, all should be included within the claim scope of the present invention.

Claims (5)

1. a method of producing calcium chlorate co-producing ultra-fine lime carbonate and sodium-chlor with carbide slag is characterized in that, comprises the steps:
A: the chlor-alkali carbide slag is dropped into ashing pond (1), and water reconciles into emulsion, and makes the content of calcium hydroxide reach 120g/L;
B: steps A gained carbide slag is delivered to chlorination tower (2), simultaneously, according to calcium hydroxide and chlorine pure substance mass ratio be 1: 0.70~1.16 in chlorination tower (2) input chlorine, carry out chlorination reaction, obtain the reaction product of chloracid calcium and calcium chloride;
C: step B gained reaction product is filtered with first strainer (4), remove solid impurity, filtrating is filtered through second strainer (6) after slurry tank (5) cooling sedimentation again, obtains calcium chlorate solid and the filtrating that contains calcium chloride;
D: the calcium chlorate solid obtains calcium chlorate product (13) through the oven dry down of oven drying at low temperature machine (7) low temperature;
E: the calcium chloride filtrating use mass concentration that step C is obtained is 4~8% surfactant treatment, and stir speed (S.S.) is 200~320r/min;
F: the filtrating of the calcium chloride after the surfactant treatment of step e gained is dropped in the corrosion-resistant reactor (8); Mass ratio 1: 0.66~0.95 according to calcium chloride and yellow soda ash pure substance drops into yellow soda ash simultaneously; Carry out chemical reaction, obtain the mixture of ZG 301 and sodium-chlor;
G: the ZG 301 of step F gained and the mixture of sodium-chlor are filtered through the 3rd strainer (9), obtain white filter cake and clarifying sodium-chlor filtrating (14);
H: white filter cake obtains light calcium carbonate finished product (15) through washing whizzer (10) washing, dry, kibbler (12) pulverizing of drying machine (11);
I: clarifying sodium-chlor filtrating is returned the chlor-alkali workshop and is recycled.
2. method of producing calcium chlorate co-producing ultra-fine lime carbonate and sodium-chlor with carbide slag as claimed in claim 1 is characterized in that, among the step B, the control chlorination reaction temperature keeps reaction soln not seethe with excitement.
3. method of producing calcium chlorate co-producing ultra-fine lime carbonate and sodium-chlor with carbide slag as claimed in claim 1 is characterized in that, among the step B, shows reaction end with chlorination table (3).
4. method of producing calcium chlorate co-producing ultra-fine lime carbonate and sodium-chlor with carbide slag as claimed in claim 1; It is characterized in that; Among the step C, slurry tank cools to 60 ℃ promptly has the sedimentation of solid calcium chlorate, and 1~2 hour begins to filter after settling temperature reaches normal temperature.
5. method of producing calcium chlorate co-producing ultra-fine lime carbonate and sodium-chlor with carbide slag as claimed in claim 1 is characterized in that said tensio-active agent is selected from emulsifiable concentrate, tween 80 and the mixture of the two.
CN2010101690720A 2010-04-30 2010-04-30 Method for production of calcium chlorate and coproduction of ultra-fine calcium carbonate and sodium chloride by using acetylene sludge Expired - Fee Related CN101983916B (en)

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