CN102976378B - Calcium aluminate powder production method - Google Patents
Calcium aluminate powder production method Download PDFInfo
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- CN102976378B CN102976378B CN201210572398.7A CN201210572398A CN102976378B CN 102976378 B CN102976378 B CN 102976378B CN 201210572398 A CN201210572398 A CN 201210572398A CN 102976378 B CN102976378 B CN 102976378B
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- calcium aluminate
- aluminate powder
- aluminum dross
- aluminum
- aluminium sesquioxide
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Abstract
The invention discloses a calcium aluminate powder production method which comprises the following steps: (1) adding waste aluminum slag into hydrochloric acid, and stirring to obtain polymerized aluminum chloride solution and polymerized waste aluminum slag; and (2) performing ball milling on the polymerized waste aluminum slag obtained in the step (1) and limestone, evenly mixing, adding into a rotary kiln, sintering into clinker, and milling into calcium aluminate powder. The waste aluminum slag is used as the raw material, so that the cost can be greatly lowered, and the benefit of 100 Yuan/ton can be increased; and the acid dissolution rate is above 95%, and the calcium aluminate powder can be returned to the step (1) for the preparation of the polymerized aluminum chloride solution, so that the waste slag content is low, and the waste aluminum slag is fully utilized, thereby solving the problem on the secondary pollution of the waste slag.
Description
Technical field
The present invention relates to a kind of production method of calcium aluminate powder, particularly a kind of method of producing calcium aluminate powder with aluminum dross.
Background technology
Along with the sustainable development of national economy, the demand of the production of calcium aluminate powder and various raw-material use constantly increase.The technique of existing production calcium aluminate powder is mainly to add Wingdale after crushing drying, ball milling with alumine, and with under rotary kiln high temperature action, sintering forms.The main raw material alumine of producing calcium aluminate powder, in product, proportion is more than 50%.And the content that requires aluminium sesquioxide in alumine must be greater than more than 70%, and the content of silicon-dioxide is less than 8%.The market value of bauxitic clay is all more than 600 yuan/ton now.Calcium aluminate powder per ton is with more than 650kg, and cost is more than 390 yuan/ton.And this kind of this bauxitic clay belongs to nonrenewable resource, and its reserves are limited.Along with reserves constantly reduce, cost of winning constantly increases, price continuous rise, so the also no longer disconnected increase of the production cost of calcium aluminate powder, being therefore badly in need of a kind of raw material cheaply replaces alumine.
At present, there is a large amount of aluminum dross in China, and aluminium sesquioxide content is 60-70%, metallic aluminium content 7-10%, and dioxide-containing silica is 3-5%, almost there is no loss on ignition, the ammonia nitrogen that contains part solubility.Aluminum dross contains high aluminium content, and the market value of aluminum dross is below 100 yuan/ton, therefore becomes the optimal selection of preparing calcium aluminate powder.
Summary of the invention
The production method that the object of this invention is to provide a kind of calcium aluminate powder, solves the deficiencies in the prior art, reduces production costs, and improves utilization of waste material, increases benefit.
The production method of calcium aluminate powder of the present invention, production stage is:
(1) aluminum dross is joined in hydrochloric acid and stirred, obtain polymeric aluminum chlorides solution and polymerization aluminum dross;
(2) get polymerization aluminum dross and the Wingdale ball milling that step (1) obtains and mix, add rotary kiln, sinter into after grog, grinding is made calcium aluminate powder.
The temperature of reaction of step (1) is 65-90 ℃.
The weight ratio of aluminum dross and hydrochloric acid is 1:4.5-5.5, and wherein, the mass percent of hydrochloric acid is 20%.
When processing aluminum dross, dilute hydrochloric acid only, with the metallic aluminium reaction in aluminum dross, does not react with aluminium sesquioxide, can also be by the impurity in aluminum dross, and particularly ammonia nitrogen removal falls, and reduces that pressure is excessive causes danger.The polymeric aluminum chlorides solution of gained can directly be used as water purification agent.
The stirring velocity of step (1) is 45-55 rev/min; Churning time is 2.5-3.5 hour.
In step (1), in gained polymeric aluminum chlorides solution, the mass percent of aluminium sesquioxide is 7.5-8%.
In step (1) polymerization aluminum dross, the weight percentage of aluminium sesquioxide is 65-75%.
In step (2), the weight ratio of polymerization aluminum dross and Wingdale is 50-65:35-50.
In step (2), sintering temperature is 1200-1300 ℃.
In step (2), sintering time is 3-4 hour.
Gained calcium aluminate powder, aluminium sesquioxide weight percentage is 45-53%, and calcium oxide weight percentage is 26-40%, and sour solubility rate is more than 95%.
Described calcium aluminate powder, then return to step (1) and make polymeric aluminum chlorides solution.Calcium aluminate powder is the main raw material of polymerize aluminum chloride, and after reaction, waste residue amount is very little.
Described calcium aluminate powder can be made refractory materials or steel mill's sweetening agent of Tai-Ace S 150 or sodium aluminate.
Compared with prior art, the present invention has following beneficial effect:
While making raw material with aluminum dross, greatly reduce cost, can increase the benefit of 100 yuan/ton.
Because sour solubility rate is more than 95%, to return to step (1) and make polymeric aluminum chlorides solution, waste residue amount is very little, and aluminum dross makes full use of.
Utilizing aluminum dross to produce the polymerization aluminum dross after polymeric aluminum chlorides solution, can reuse production polymeric aluminum chlorides solution, solved the secondary pollution of waste residue.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1
Each composition weight percentage of aluminum dross is: aluminium: 10%, aluminium sesquioxide: 65%, silicon-dioxide: 3%.
Getting aluminum dross 1000kg, to add mass percent be 20% dilute hydrochloric acid 5000kg, controlling temperature of reaction is 65 ℃, under 50 revs/min of low whipping speeds, stir 3 hours, obtain the polymeric aluminum chlorides solution 4500kg containing aluminium sesquioxide 8%, the waste residue 860kg of aluminium sesquioxide weight percentage 74%.
The polymerization aluminum dross 500g that gets aluminium sesquioxide weight percentage 74%, adds Wingdale 500g, calcines 3 hours at 1280 ℃, obtains 750g calcium aluminate powder.In calcium aluminate powder, the mass percent of aluminium sesquioxide is 49.3%, the mass percent of calcium oxide is 36%.
Embodiment 2
Each composition weight percentage of aluminum dross is: aluminium: 9%, aluminium sesquioxide: 70%, silicon-dioxide: 4%.
Getting aluminum dross 1000kg, to add mass percent be 20% dilute hydrochloric acid 5000kg, controlling temperature of reaction is 80 ℃, under 48 revs/min of low whipping speeds, stir 3.2 hours, obtain the polymeric aluminum chlorides solution 4600kg containing aluminium sesquioxide 7.5%, the waste residue 880kg of aluminium sesquioxide weight percentage 70%.
The polymerization aluminum dross 520g that gets aluminium sesquioxide weight percentage 70%, adds Wingdale 480g, calcines 3.3 hours at 1200 ℃, obtains 758g calcium aluminate powder.In calcium aluminate powder, the mass percent of aluminium sesquioxide is 48.76%, the mass percent of calcium oxide is 34.8%.
Embodiment 3
Each composition weight percentage of aluminum dross is: aluminium: 9.5%, aluminium sesquioxide: 60%, silicon-dioxide: 5%.
Getting aluminum dross 1000kg, to add mass percent be 20% dilute hydrochloric acid 4800kg, controlling temperature of reaction is 90 ℃, under 52 revs/min of low whipping speeds, stir 2.8 hours, obtain the polymeric aluminum chlorides solution 4450kg containing aluminium sesquioxide 7.5%, the waste residue 870kg of aluminium sesquioxide weight percentage 68%.
The polymerization aluminum dross 550g that gets aluminium sesquioxide weight percentage 68%, adds Wingdale 450g, calcines 3.5 hours at 1300 ℃, obtains 770g calcium aluminate powder.In calcium aluminate powder, the mass percent of aluminium sesquioxide is 48.57%, the mass percent of calcium oxide is 32.14%.
Embodiment 4
Each composition weight percentage of aluminum dross is: aluminium: 8%, aluminium sesquioxide: 65%, silicon-dioxide: 4%.
Getting aluminum dross 1000kg, to add mass percent be 20% dilute hydrochloric acid 5000kg, controlling temperature of reaction is 65 ℃, under 45 revs/min of low whipping speeds, stir 3.5 hours, obtain the polymeric aluminum chlorides solution 4550kg containing aluminium sesquioxide 7%, the waste residue 865kg of aluminium sesquioxide weight percentage 65%.
The polymerization aluminum dross 590g that gets aluminium sesquioxide weight percentage 65%, adds Wingdale 410g, calcines 4 hours at 1250 ℃, obtains 763g calcium aluminate powder.In calcium aluminate powder, the mass percent of aluminium sesquioxide is 50.32%, the mass percent of calcium oxide is 31.43%.
Embodiment 5
Each composition weight percentage of aluminum dross is: aluminium: 7%, aluminium sesquioxide: 68%, silicon-dioxide: 5%.
Getting aluminum dross 1000kg, to add mass percent be 20% dilute hydrochloric acid 5300kg, controlling temperature of reaction is 75 ℃, under 55 revs/min of low whipping speeds, stir 2.5 hours, obtain the polymeric aluminum chlorides solution 4000kg containing aluminium sesquioxide 7.5%, the waste residue 850kg of aluminium sesquioxide weight percentage 75%.
The polymerization aluminum dross 640g that gets aluminium sesquioxide weight percentage 75%, adds Wingdale 360g, calcines 3.8 hours at 1230 ℃, obtains 800g calcium aluminate powder.In calcium aluminate powder, the mass percent of aluminium sesquioxide is 52.62%, the mass percent of calcium oxide is 26.21%.
Get 500g calcium aluminate powder and turn back to step (1), add in dilute hydrochloric acid, controlling temperature of reaction is 75 ℃, under 55 revs/min of low whipping speeds, stirs 2.5 hours, obtains polymeric aluminum chlorides solution.
Claims (1)
1. a production method for calcium aluminate powder, is characterized in that, adopts aluminum dross as raw material, and step is as follows:
(1) aluminum dross is joined in hydrochloric acid and stirred, obtain polymeric aluminum chlorides solution and polymerization aluminum dross;
(2) get polymerization aluminum dross and the Wingdale ball milling that step (1) obtains and mix, add rotary kiln, sinter into after grog, grinding is made calcium aluminate powder;
The temperature of reaction of step (1) is 65-90 ℃;
In step (1), the weight ratio of aluminum dross and hydrochloric acid is 1:4.5-5.5;
The stirring velocity of step (1) is 45-55 rev/min; Churning time is 2.5-3.5 hour;
In step (1), in polymeric aluminum chlorides solution, the massfraction of aluminium sesquioxide is 7.5-8%;
In step (1) polymerization aluminum dross, the weight percentage of aluminium sesquioxide is 65-75%;
In step (2), the weight ratio of polymerization aluminum dross and Wingdale is 50-65:35-50;
In step (2), sintering temperature is 1200-1300 ℃;
In step (2), sintering time is 3-4 hour;
The calcium aluminate powder of gained returns step (1) and makes polymeric aluminum chlorides solution.
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| CN201210572398.7A CN102976378B (en) | 2012-12-25 | 2012-12-25 | Calcium aluminate powder production method |
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| CN201210572398.7A CN102976378B (en) | 2012-12-25 | 2012-12-25 | Calcium aluminate powder production method |
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| CN102976378B true CN102976378B (en) | 2014-10-22 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105692727A (en) * | 2016-02-17 | 2016-06-22 | 嘉善海峡净水灵化工有限公司 | Method for preparing multifunctional water treatment agent |
| CN106241843A (en) * | 2016-07-19 | 2016-12-21 | 武汉理工大学 | A kind of method that aluminium hydroxide is prepared in polyaluminium waste slag of aluminum acid system recovery |
| CN109928472A (en) * | 2019-03-04 | 2019-06-25 | 山东铝晖环保科技有限公司 | By the method for aluminium ash, the water purification agent of sulfuric acid and the preparation of optional red mud containing polyaluminium sulfate |
| CN115974119A (en) * | 2022-12-01 | 2023-04-18 | 百色实华环保科技有限公司 | Method for preparing polyaluminum chloride from medium-high aluminum slag in electrolytic aluminum overhaul slag |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172635A (en) * | 2007-11-29 | 2008-05-07 | 上海交通大学 | Method for producing calcium aluminate with waste aluminum gray |
| CN101913634B (en) * | 2010-08-28 | 2012-07-11 | 河南科泰净水材料有限公司 | Processing method for recycling aluminum dross |
| CN102674422A (en) * | 2012-05-22 | 2012-09-19 | 李松 | Method for preparing flocculant liquid polyaluminum chloride from aluminum ash |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1053411A (en) * | 1996-08-08 | 1998-02-24 | Arutetsuku Amino Kk | Production of calcium aluminate |
| KR20060056179A (en) * | 2004-11-20 | 2006-05-24 | 주식회사 천호기업 | Water treating composition using the aluminium dross |
| US7727328B2 (en) * | 2006-05-16 | 2010-06-01 | Harsco Corporation | Regenerated calcium aluminate product and process of manufacture |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172635A (en) * | 2007-11-29 | 2008-05-07 | 上海交通大学 | Method for producing calcium aluminate with waste aluminum gray |
| CN101913634B (en) * | 2010-08-28 | 2012-07-11 | 河南科泰净水材料有限公司 | Processing method for recycling aluminum dross |
| CN102674422A (en) * | 2012-05-22 | 2012-09-19 | 李松 | Method for preparing flocculant liquid polyaluminum chloride from aluminum ash |
Non-Patent Citations (3)
| Title |
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| 合理利用资源生产铝酸钙精炼渣的研究";张延大;《中国非金属矿工业导刊》;20121025(第5期);第19-21页 * |
| 张延大.合理利用资源生产铝酸钙精炼渣的研究".《中国非金属矿工业导刊》.2012,(第5期),第19-21页. |
| 苏晓梅等.铝灰渣高效利用的试验研究.《华中师范大学学报（自然科学版）》.2010,第44卷(第2期),第254-258页. * |
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