CN102093023A - Non-fired brick and preparation method thereof - Google Patents
Non-fired brick and preparation method thereof Download PDFInfo
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- CN102093023A CN102093023A CN 201010606170 CN201010606170A CN102093023A CN 102093023 A CN102093023 A CN 102093023A CN 201010606170 CN201010606170 CN 201010606170 CN 201010606170 A CN201010606170 A CN 201010606170A CN 102093023 A CN102093023 A CN 102093023A
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- gypsum
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Abstract
The invention discloses a non-fired brick which consists of gypsum which is prepared from the desulphurisation by-product of sintering flue gas through the semi-dry method, sand, fly ash and cement in a ratio of 15:41-45:32-36:8. The preparation method of the non-fired brick comprises the following steps: mixing the obtained gypsum, sand, fly ash and cement in a ratio of 15:41-45:32-36:8, rolling and stirring, and forming at 20MPa. The preparation method of the gypsum comprises the following steps: mixing the desulphurisation by-product and quick lime in a ratio of 4:1, preparing 10%-12% emulsion in an emulsion-making device, then sending the obtained emulsion in a reaction tank to react with waste sulfuric acid solution and ensure that the pH value of the mixed solution is 6.5-7.5, pumping the mixed solution in a concentration basin to concentrate, discharging wastewater after concentration, pumping the obtained concentrate in a dehydration device for dehydration, and drying after dehydration to obtain gypsum.
Description
Technical field
The invention belongs to environmental protection and comprehensive utilization of resources field, relate in particular to the non-burning brick and preparation method thereof of a kind of semidrying sintering flue gas desulfurization by product preparation
Background technology
At present, the national environmental protection policy requirements is answered by domestic each big steel mill, all in the sintering flue gas desulfurization engineering that starts, the technology of taking is not quite similar, advantages such as semidrying is lacked owing to it takes up an area of, and the equipment anticorrosion investment is little, and water consumption is few have attracted the interest of numerous producers, but semidrying sintering flue gas desulfurization by product complicated component mainly contains CaSO
3, CaSO
4, unreacted is Ca (OH) completely
2With CaO and other impurity.Because its complicated component, and granularity is superfine, and air storage is easy to generate airborne dust; Alkalescence is very strong, and the pH value of solution value reaches 12.81, if landfill disposal needs to dispose according to the standard of hazardous solid waste, the landfill cost is higher; Be used for material of construction as low-grade gypsum, because CaSO
3The content height is easy to generate expansion explosion.Therefore, how disposing semidrying sinter fume by product becomes domestic and international a great problem, at present still good without comparison processing scheme.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of by prepared non-burning brick and preparation method thereof of the gypsum of semidrying sintering flue gas desulfurization by product preparation.
For solving the problems of the technologies described above, gypsum, sand, flyash and the cement by the preparation of semidrying sintering flue gas desulfurization by product provided by the invention is formed in 15: 41～45: 32～36: 8 ratio, and described ratio is a mass ratio.
Non-burning brick preparation method provided by the invention is: gypsum, sand, flyash and cement by the preparation of semidrying sintering flue gas desulfurization by product mix in 15: 41～45: 32～36: 8 ratio, and wheel is rolled over and stirred, at the forming under the pressure of 20MPa.
The preparation method of described gypsum is, with described desulfurizing byproduct and unslaked lime mixed according to 4: 1 (mass ratio), in the newborn device of system, be configured to the emulsion of 10%-12% (mass percent %), with described emulsion input reaction tank and waste sulfuric acid solution reaction, pH of mixed reaches 6.5-7.5 in the question response pond then, mixed solution is pumped into concentration basin concentrate, concentrating back waste water discharges, enriched material pumps into the dewatering unit dehydration, and the dehydration after drying obtains gypsum.
What the invention provides a kind of semidrying sintering flue gas desulfurization by product efficiently utilizes new way, utilize described alkaline desulfurizing byproduct and waste sulfuric acid solution generation neutralization reaction, reach the effect of the treatment of wastes with processes of wastes against one another, not only solved the processing and utilizing difficult problem that the semidrying sinter fume takes off by product, also reduced enterprise's waste sulfuric acid solution processing cost, after the semidrying sinter fume takes off by product and waste sulfuric acid solution reaction simultaneously, the CaSO in the semidrying sintering flue gas desulfurization by product
3Be converted into and stablize CaSO
4, obtaining gypsum after the reaction precipitation thing drying, described gypsum prepares non-burning brick.Its 7 days ultimate compression strength are 10.6～11.9MPa, and 28 days ultimate compression strength is 30.6～35.6MPa, presses the steaming soundness test under the pressure of 2MPa, and is qualified.
Embodiment
Technical scheme of the present invention is that semidrying sintering flue gas desulfurization by product and unslaked lime are made breast according to a certain percentage in the newborn device of system, gained emulsion and waste sulfuric acid solution carry out neutralization reaction, after reaction finishes, reaction solution is obtained gypsum product after precipitating concentrated back enriched material drying treatment, the gained gypsum product meets the relevant national standard requirement as producing non-burning brick product.The concrete composition of semidrying sintering flue gas desulfurization by product sees Table 1, and waste sulfuric acid solution pH is between 2.0～2.5, and the CaO composition is between 59%-62% (mass percent %).
Table 1: semidrying sintering flue gas desulfurization by product composition
Embodiment 1
With semidrying sintering flue gas desulfurization by product and unslaked lime mixed according to 4: 1, be configured to 10% emulsion, react with waste sulfuric acid solution, adopt blower fan to carry out blast aeration in the time of reaction, it is air-dry to react the spissated enriched material in end back, with sand, flyash and cement were according to 15: 41: 36: 8 ratio is mixed, wheel roll over to stir, at the forming under the pressure of 20MPa, produce 240 * 120 * 53 non-burning brick, detecting its 7 days ultimate compression strength is 11.6MPa, 28 days ultimate compression strength is 35.6MPa, presses the steaming soundness test under the pressure of 2MPa, and is qualified.
Embodiment 2
With semidrying sintering flue gas desulfurization by product and unslaked lime mixed according to 4: 1, be configured to 11% emulsion, react with waste sulfuric acid solution, adopt blower fan to carry out blast aeration in the time of reaction, it is air-dry to react the spissated enriched material in end back, with sand, flyash and cement were according to 15: 43: 34: 8 ratio is mixed, wheel roll over to stir, at the forming under the pressure of 20MPa, produce 240 * 120 * 53 non-burning brick, detecting its 7 days ultimate compression strength is 10.6MPa, 28 days ultimate compression strength is 30.6MPa, presses the steaming soundness test under the pressure of 2MPa, and is qualified.
Embodiment 3
With semidrying sintering flue gas desulfurization by product and unslaked lime mixed according to 4: 1, be configured to 10% emulsion, react with waste sulfuric acid solution, adopt blower fan to carry out blast aeration in the time of reaction, it is air-dry to react the spissated enriched material in end back, with sand, flyash and cement were according to 15: 45: 32: 8 ratio is mixed, wheel roll over to stir, at the forming under the pressure of 20MPa, produce 240 * 120 * 53 non-burning brick, detecting its 7 days ultimate compression strength is 11.9MPa, 28 days ultimate compression strength is 31.3MPa, presses the steaming soundness test under the pressure of 2MPa, and is qualified.
Claims (6)
- One kind non-burning brick, it is characterized in that, form in 15: 41～45: 32～36: 8 ratio by gypsum, sand, flyash and the cement of semidrying sintering flue gas desulfurization by product preparation.
- 2. a non-burning brick preparation method is characterized in that, the gypsum, sand, flyash and the cement that are prepared by semidrying sintering flue gas desulfurization by product mix in 15: 41～45: 32～36: 8 ratio, and wheel is rolled over and stirred, at the forming under the pressure of 20MPa.
- 3. as non-burning brick preparation method as described in the claim 2, it is characterized in that, the preparation method of described gypsum is: with described desulfurizing byproduct and the unslaked lime mixed according to 4: 1, be configured to the emulsion of 10%-12% in the newborn device of system, then described emulsion input reaction tank reacted with waste sulfuric acid solution, pH of mixed reaches 6.5-7.5 in the question response pond, mixed solution is pumped into concentration basin concentrate, concentrate back waste water and discharge, enriched material pumps into the dewatering unit dehydration, the dehydration after drying obtains gypsum.
- 4. as non-burning brick preparation method as described in the claim 3, it is characterized in that described emulsion input reaction tank adopts the whipping appts stirring with the waste sulfuric acid solution reaction time.
- 5. as non-burning brick preparation method as described in the claim 4, it is characterized in that described emulsion input reaction tank adopts the stirring of blast aeration device with the waste sulfuric acid solution reaction time.
- 6. as non-burning brick preparation method as described in the claim 3, it is characterized in that described emulsion sprays into reaction tank at a high speed along circular reaction tank tangent to periphery direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010606170 CN102093023B (en) | 2010-12-27 | 2010-12-27 | Non-fired brick and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010606170 CN102093023B (en) | 2010-12-27 | 2010-12-27 | Non-fired brick and preparation method thereof |
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| Publication Number | Publication Date |
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| CN102093023A true CN102093023A (en) | 2011-06-15 |
| CN102093023B CN102093023B (en) | 2012-12-05 |
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| CN 201010606170 Active CN102093023B (en) | 2010-12-27 | 2010-12-27 | Non-fired brick and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491707A (en) * | 2011-11-29 | 2012-06-13 | 湖南科技大学 | Method of preparing baking-free load-bearing bricks through steam curing of semidry desulfurization residues |
| CN114230213A (en) * | 2021-12-29 | 2022-03-25 | 靖西市大西南锰业有限公司 | Resource utilization method of electrolytic manganese filter-pressing residues |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2584018C1 (en) * | 2015-02-24 | 2016-05-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный архитектурно-строительный университет" | Crude mixture for making construction articles based on non-fired technology |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1154263A (en) * | 1996-01-11 | 1997-07-16 | 彭斯干 | Method and equipment for desulfurizing flue gas by circulation and fluidization |
| CN101672081A (en) * | 2009-10-14 | 2010-03-17 | 首钢总公司 | Method for preparing non-fired and non-steamed bricks by using sintering dry desulphurization byproduct |
-
2010
- 2010-12-27 CN CN 201010606170 patent/CN102093023B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1154263A (en) * | 1996-01-11 | 1997-07-16 | 彭斯干 | Method and equipment for desulfurizing flue gas by circulation and fluidization |
| CN101672081A (en) * | 2009-10-14 | 2010-03-17 | 首钢总公司 | Method for preparing non-fired and non-steamed bricks by using sintering dry desulphurization byproduct |
Non-Patent Citations (1)
| Title |
|---|
| 《中国建材》 20001006 张学顺 《粉煤灰免烧砖的研制》 第71页右栏第6段 1-6 , 第10期 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491707A (en) * | 2011-11-29 | 2012-06-13 | 湖南科技大学 | Method of preparing baking-free load-bearing bricks through steam curing of semidry desulfurization residues |
| CN114230213A (en) * | 2021-12-29 | 2022-03-25 | 靖西市大西南锰业有限公司 | Resource utilization method of electrolytic manganese filter-pressing residues |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102093023B (en) | 2012-12-05 |
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Address after: 243003 intellectual property department, technology center, No. 8 Hunan West Road, Yushan, Ma'anshan, Anhui Patentee after: Ma'anshan Iron and Steel Co., Ltd. Address before: 243003 intellectual property department, technology center, No. 8 Hunan West Road, Ma'anshan, Anhui Patentee before: Ma'anshan Iron and Steel Co., Ltd. |
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Address after: 243003 8 Jiuhua Road, Yushan, Ma'anshan, Anhui Patentee after: Ma'anshan Iron and Steel Co., Ltd. Address before: 243003 intellectual property department, technology center, No. 8 Hunan West Road, Yushan, Ma'anshan, Anhui Patentee before: Ma'anshan Iron and Steel Co., Ltd. |