CN102530884A - Method for preparing sulfuric acid and cement with fluorine gypsum - Google Patents
Method for preparing sulfuric acid and cement with fluorine gypsum Download PDFInfo
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- CN102530884A CN102530884A CN201110424059XA CN201110424059A CN102530884A CN 102530884 A CN102530884 A CN 102530884A CN 201110424059X A CN201110424059X A CN 201110424059XA CN 201110424059 A CN201110424059 A CN 201110424059A CN 102530884 A CN102530884 A CN 102530884A
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- cement
- fluorgypsum
- sulfuric acid
- coal
- sandy soil
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Abstract
A method for preparing sulfuric acid and cement with fluorine gypsum comprises the following steps that: (1) the fluorine gypsum, sandy oil, coal and iron hydroxide are mixed; (2) the obtained mixture is added in a grinding preheater to be ground; (3) the mixture which is treated in the step (2) is added into a rotary kiln to be calcined; (4) cement clinker which is obtained in the step (3) is cooled and is then added with cement retarder to be ground into powder, so a cement product is obtained; and (5) tail gas which contains sulfur dioxide (SO2) is fed into the grinding preheater, the temperature of the tail gas is reduced, then after dedusting, cooling, cleaning, purifying and absorbing, the sulfuric acid is produced. In the method, fluorine gypsum waste residues which are produced during the fluoride saltproduction process are used as raw materials for preparing the cement and the sulfuric acid, so that the utilization problem of the fluorine gypsum waste residues which are produced during the fluoride saltproduction process is solved, the load of fluoride salt production enterprises is relieved, the economic benefit is improved, and the environmental protection is also benefited.
Description
Technical field
The present invention relates to a kind of method for preparing sulfuric acid and cement, especially relate to a kind of method of utilizing fluorgypsum to prepare sulfuric acid and cement.
Background technology
Producing the vitriolic traditional method has a lot, for example, adopts sulphur to produce sulfuric acid, sulfide, and production cost was once very low, and used sulphur to produce sulfuric acid and sulfide, and main products is a sulfide, and sulfuric acid is sub product, and is more worthwhile.But along with rising steadily of sulphur price; Produce the vitriolic cost and also constantly raise, though the also rising to some extent of vitriolic price, ascensional range is less; Cause the gas washing in SA production enterprise profit progressively to reduce, in fact use sulphur to produce vitriolic enterprise and be in lossing state.
For fluoride salt manufacturing enterprise, owing in the production process of hydrofluoric acid, can produce a large amount of waste slag of fluorine gypsum, these waste slag of fluorine gypsum are not utilized effectively, and not only cause a large amount of wastings of resources, and environment has also been caused severe contamination.
Summary of the invention
The technical problem that the present invention will solve is, overcomes the deficiency of prior art, provides a kind of energy consumption low, and technology is simple, and profitable fluorgypsum prepares the method for sulfuric acid and cement.
The present invention solve the technical problem the technical scheme that is adopted, and may further comprise the steps:
(1) fluorgypsum, sandy soil, coal and ironic hydroxide are mixed, obtain the mixture of fluorgypsum, sandy soil, coal and ironic hydroxide;
The weight percent of said fluorgypsum, sandy soil, coal and ironic hydroxide is: fluorgypsum 75-85%, sandy soil 5-15%, ironic hydroxide 0.5-2%, coal 8-15%; Preferred weight percent is: fluorgypsum 80%, sandy soil 10%, ironic hydroxide 1%, coal 9%;
(2) step (1) gained mixture is joined to grind in the preheater grind, grind size is that 0.20mm tails over less than 8%; When grinding, mixture is carried out preheating, preheating temperature is 600-750 ℃;
(3) will in the mixture adding rotary kiln that step (2) is handled, calcine, calcining temperature is 900-1550 ℃ (preferred 1500 ℃), and calcination time is 2-5h, and (the preferred air flow quantity that feeds is 0.8-1.5m to incinerating while bubbling air
3/ h), get cement clinker and sulfur dioxide gas;
(4) with the cooling of step (3) gained cement clinker, add the cement setting retarder that is equivalent to cement clinker weight 4-6% again, grind to form powder, obtain cement products;
(5) will contain SO
2Tail gas through grinding preheater, reduce the temperature of tail gas, and then absorb through dedusting, cooling, washing, purification, process sulfuric acid.
The preferred dihydrate gypsum of said cement setting retarder.
The present invention's fluorgypsum prepares the method for sulfuric acid and cement, utilizes the waste slag of fluorine gypsum that produces in the fluoride salt production process to produce cement and sulfuric acid for raw material, turns waste into wealth, the abundant resource of having utilized; Not only solved the waste slag of fluorine gypsum that produces in the fluoride salt production process and utilized problem, manufacturing enterprise reduces the heavy burdens for fluoride salt, increases economic efficiency, and helps environment protection.
The heat that produces in the present invention's high temperature sulfurous gas also capable of using process of cooling generates electricity or heating, is used for producing, and forms the system of a comprehensive utilization, reduces production energy consumption.
Embodiment
Below in conjunction with embodiment the present invention is done further explain.
Embodiment 1
Present embodiment may further comprise the steps:
(1) fluorgypsum, sandy soil, coal and ironic hydroxide are mixed, obtain the mixture of fluorgypsum, sandy soil, coal and ironic hydroxide;
The weight percent of said fluorgypsum, sandy soil, coal and ironic hydroxide is: fluorgypsum 80%, sandy soil 10%, ironic hydroxide 1%, coal 9%;
(2) step (1) gained mixture is joined to grind in the preheater grind, grind size is that 0.20mm tails over less than 8%; When grinding, mixture is carried out preheating, preheating temperature is 600 ℃;
(3) will in the mixture adding rotary kiln that step (2) is handled, calcine, calcining temperature is 1500 ℃, and calcination time is 5h, and incinerating is bubbling air simultaneously, and the air flow quantity of feeding is 0.8m
3/ h gets cement clinker and sulfur dioxide gas;
(4) with the cooling of step (3) gained cement clinker, add the cement setting retarder dihydrate gypsum that is equivalent to cement clinker weight 4% again, grind to form powder, obtain cement products;
(5) will contain SO
2Tail gas through grinding preheater, reduce the temperature of tail gas, and then absorb through dedusting, cooling, washing, purification, process sulfuric acid.
Present embodiment gained cement clinker analysis of components detected result is seen table 1, and present embodiment gained sulfuric acid product analyzing and testing result sees table 2.
Embodiment 2
Present embodiment may further comprise the steps:
(1) fluorgypsum, sandy soil, coal and ironic hydroxide are mixed, obtain the mixture of fluorgypsum, sandy soil, coal and ironic hydroxide;
The weight percent of said fluorgypsum, sandy soil, coal and ironic hydroxide is: fluorgypsum 75%, sandy soil 15%, ironic hydroxide 2%, coal 8%;
(2) step (1) gained mixture is joined to grind in the preheater grind, grind size is that 0.20mm tails over less than 8%; When grinding, mixture is carried out preheating, preheating temperature is 700 ℃;
(3) will in the mixture adding rotary kiln that step (2) is handled, calcine, calcining temperature is 900 ℃, and calcination time is 2h, and incinerating is bubbling air simultaneously, and the air flow quantity of feeding is 1.5m
3/ h gets cement clinker and sulfur dioxide gas;
(4) with the cooling of step (3) gained cement clinker, add the cement setting retarder dihydrate gypsum that is equivalent to cement clinker weight 5% again, grind to form powder, obtain cement products;
(5) will contain SO
2Tail gas through grinding preheater, reduce the temperature of tail gas, and then absorb through dedusting, cooling, washing, purification, process sulfuric acid.
Present embodiment gained cement clinker analysis of components detected result is seen table 1, and present embodiment gained sulfuric acid product analyzing and testing result sees table 2.
Embodiment 3
Present embodiment may further comprise the steps:
(1) fluorgypsum, sandy soil, coal and ironic hydroxide are mixed, obtain the mixture of fluorgypsum, sandy soil, coal and ironic hydroxide;
The weight percent of said fluorgypsum, sandy soil, coal and ironic hydroxide is: fluorgypsum 85%, sandy soil 5%, ironic hydroxide 0.5%, coal 9.5%;
(2) step (1) gained mixture is joined to grind in the preheater grind, grind size is that 0.20mm tails over less than 8%; When grinding, mixture is carried out preheating, preheating temperature is 750 ℃;
(3) will in the mixture adding rotary kiln that step (2) is handled, calcine, calcining temperature is 1200 ℃, and calcination time is 4h, and incinerating is bubbling air simultaneously, and the air flow quantity of feeding is 1.0m
3/ h gets cement clinker and sulfur dioxide gas;
(4) with the cooling of step (3) gained cement clinker, add the cement setting retarder dihydrate gypsum that is equivalent to cement clinker weight 6% again, grind to form powder, obtain cement products;
(5) will contain SO
2Tail gas through grinding preheater, reduce the temperature of tail gas, and then absorb through dedusting, cooling, washing, purification, process sulfuric acid.
Present embodiment gained cement clinker analysis of components detected result is seen table 1, and present embodiment gained sulfuric acid product analyzing and testing result sees table 2.
Embodiment 4
Present embodiment may further comprise the steps:
(1) fluorgypsum, sandy soil, coal and ironic hydroxide are mixed, obtain the mixture of fluorgypsum, sandy soil, coal and ironic hydroxide;
The weight percent of said fluorgypsum, sandy soil, coal and ironic hydroxide is: fluorgypsum 79%, sandy soil 5%, ironic hydroxide 1%, coal 15%;
(2) step (1) gained mixture is joined to grind in the preheater grind, grind size is that 0.20mm tails over less than 8%; When grinding, mixture is carried out preheating, preheating temperature is 720 ℃;
(3) will in the mixture adding rotary kiln that step (2) is handled, calcine, calcining temperature is 1550 ℃, and calcination time is 5h, and incinerating is bubbling air simultaneously, and the air flow quantity of feeding is 1.2m
3/ h gets cement clinker and sulfur dioxide gas;
(4) with the cooling of step (3) gained cement clinker, add the cement setting retarder dihydrate gypsum that is equivalent to cement clinker weight 5% again, grind to form powder, obtain cement products;
(5) will contain SO
2Tail gas through grinding preheater, reduce the temperature of tail gas, and then absorb through dedusting, cooling, washing, purification, process sulfuric acid.
Present embodiment gained cement clinker analysis of components detected result is seen table 1, and present embodiment gained sulfuric acid product analyzing and testing result sees table 2.
Table 1 embodiment 1-4 cement clinker analysis of components detected result
Table 2 embodiment 1-4 sulfuric acid product analyzing and testing result
Claims (5)
1. a fluorgypsum prepares the method for sulfuric acid and cement, it is characterized in that, may further comprise the steps:
(1) fluorgypsum, sandy soil, coal and ironic hydroxide are mixed, obtain the mixture of fluorgypsum, sandy soil, coal and ironic hydroxide;
The weight percent of said fluorgypsum, sandy soil, coal and ironic hydroxide is: fluorgypsum 75-85%, sandy soil 5-15%, ironic hydroxide 0.5-2%, coal 8-15%;
(2) step (1) gained mixture is joined to grind in the preheater grind, grind size is that 0.20mm tails over less than 8%; When grinding, mixture is carried out preheating, preheating temperature is 600-750 ℃;
(3) will in the mixture adding rotary kiln that step (2) is handled, calcine, calcining temperature is 900-1550 ℃, and calcination time is 2-5h, and incinerating is bubbling air simultaneously, gets cement clinker and sulfur dioxide gas;
(4) with the cooling of step (3) gained cement clinker, add the cement setting retarder that is equivalent to cement clinker weight 4-6% again, grind to form powder, obtain cement products;
(5) will contain SO
2Tail gas through grinding preheater, reduce the temperature of tail gas, and then absorb through dedusting, cooling, washing, purification, process sulfuric acid.
2. fluorgypsum according to claim 1 prepares the method for sulfuric acid and cement, it is characterized in that, the weight percent of said fluorgypsum, sandy soil, coal and ironic hydroxide is: fluorgypsum 80%, sandy soil 10%, ironic hydroxide 1%, coal 9%.
3. fluorgypsum according to claim 1 and 2 prepares the method for sulfuric acid and cement, it is characterized in that, step (3), said calcining temperature are 1500 ℃.
4. fluorgypsum according to claim 1 and 2 prepares the method for sulfuric acid and cement, it is characterized in that, said step (3), the air flow quantity of feeding are 0.8-1.5m
3/ h.
5. fluorgypsum according to claim 1 and 2 prepares the method for sulfuric acid and cement, it is characterized in that, and step (4), said cement setting retarder is a dihydrate gypsum.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104176958A (en) * | 2014-08-15 | 2014-12-03 | 安徽锦洋氟化学有限公司 | Comprehensive utilization method of solid waste residues generated in hydrogen fluoride production |
| CN106365478A (en) * | 2016-09-23 | 2017-02-01 | 金正大生态工程集团股份有限公司 | Method for simultaneously producing sulphate aluminum cement and sulfuric acid through segmented calcination of phosphorus gypsum |
| CN107804984A (en) * | 2017-11-06 | 2018-03-16 | 甘肃恒亚水泥有限公司 | A kind of high strength cement and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343047A (en) * | 2008-08-26 | 2009-01-14 | 山东鲁北企业集团总公司 | Improved preparation technique for preparing sulphuric acid and cement with gypsum |
| CN101830442A (en) * | 2010-04-27 | 2010-09-15 | 重庆三圣特种建材股份有限公司 | Process for co-producing sulphuric acid and cement by using gypsum |
| CN102020251A (en) * | 2010-11-08 | 2011-04-20 | 南京创能电力科技开发有限公司 | Improved production process for preparing sulfuric acid and cement from gypsum |
-
2011
- 2011-12-19 CN CN201110424059XA patent/CN102530884A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343047A (en) * | 2008-08-26 | 2009-01-14 | 山东鲁北企业集团总公司 | Improved preparation technique for preparing sulphuric acid and cement with gypsum |
| CN101830442A (en) * | 2010-04-27 | 2010-09-15 | 重庆三圣特种建材股份有限公司 | Process for co-producing sulphuric acid and cement by using gypsum |
| CN102020251A (en) * | 2010-11-08 | 2011-04-20 | 南京创能电力科技开发有限公司 | Improved production process for preparing sulfuric acid and cement from gypsum |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104176958A (en) * | 2014-08-15 | 2014-12-03 | 安徽锦洋氟化学有限公司 | Comprehensive utilization method of solid waste residues generated in hydrogen fluoride production |
| CN104176958B (en) * | 2014-08-15 | 2016-02-03 | 安徽锦洋氟化学有限公司 | A kind of method of comprehensive utilization of solid slag of hydrogen fluoride production |
| CN106365478A (en) * | 2016-09-23 | 2017-02-01 | 金正大生态工程集团股份有限公司 | Method for simultaneously producing sulphate aluminum cement and sulfuric acid through segmented calcination of phosphorus gypsum |
| CN107804984A (en) * | 2017-11-06 | 2018-03-16 | 甘肃恒亚水泥有限公司 | A kind of high strength cement and preparation method thereof |
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Application publication date: 20120704 |