CN104192881A - Method for preparing multipurpose solid waste slag by using return sand and return stone and application of solid waste slag - Google Patents
Method for preparing multipurpose solid waste slag by using return sand and return stone and application of solid waste slag Download PDFInfo
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- CN104192881A CN104192881A CN201410383248.0A CN201410383248A CN104192881A CN 104192881 A CN104192881 A CN 104192881A CN 201410383248 A CN201410383248 A CN 201410383248A CN 104192881 A CN104192881 A CN 104192881A
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Abstract
The invention relates to a method for preparing multipurpose solid waste slag by using return sand and return stone. The method comprises the following steps: firstly, crushing the return sand and the return stone and grinding into return sand powder and return stone powder and soaking for 0.5-14 days in water to digest over-sintered calcium oxide; secondly, separating and recovering calcium hydroxide for the production of chemical products from the digested return sand powder and return stone powder and thirdly, serving the residue after the calcium hydroxide is separated and recovered as the solid waste slag. The invention also discloses an application of the solid waste slag. Due to adoption of the method disclosed by the invention, the problem of over-sintered calcium oxide in return sand and the return stone can be effectively solved, calcium hydroxide can be effectively utilized and meanwhile, the solid slag generated by digesting return sand and the return stone can be applied in a plurality of purposes and thus the problems of treatment and reutilization of return sand and the return stone are effectively solved and the environmental friendliness and cost saving are achieved.
Description
Technical field
The invention belongs to industrial solid castoff process field, particularly a kind of method and application that utilizes sand return to return standby multi-usage solid slag made of stones.
Background technology
It is that chemical industry utilizes Wingdale to prepare the byproduct of carbonic acid gas and calcium hydroxide that stone is returned in sand return, and its main component is calcium carbonate, and the calcium oxide that contains part burning, as one ton of soda ash of every production will produce general 165kg sand return, returns stone.
Owing to wherein containing burning calcium oxide, its for a long time always for paving the way, the purposes such as shaft kiln cement starting material, although utility value is low, major part can consume.And along with the eliminating of the raising that road quality is required and shaft kiln cement plant, its utilization ratio declines on the contrary, is badly in need of seeking the new approach that utilizes.
Li Junjies etc., in order to improve its utility value, return stone mill powder using sand return and replace flyash as the method for concrete admixture and carry out experimental study.Result of study shows, sand return is returned stone flour and is compared Using Coal Cinder as Blended Material for Concrete, not only can improve the serviceability of concrete mix, and mobility is improved, and can improve concrete early strength and anti-carbonation properties, resistance of chloride ion penetration and later strength are poorer than flyash concrete; Sand return is returned stone flour and is replaced flyash to make mortar adulterant, under certain consistency range, can reduce mortar water consumption, reduces delamination degree, shortens time of coagulation, but can reduce mortar ultimate compression strength.This utilization of returning stone for sand return provides a thinking, but owing to not solving the wherein problem of burning calcium oxide, mortar and concrete may exist stability problem, are difficult to practical application.
Summary of the invention
For addressing the above problem, the object of the present invention is to provide a kind ofly can effectively solve the harm that burning calcium oxide in stone is returned in sand return, and can make full use of the method for calcium hydroxide and remaining solid waste residue.
Object of the present invention is achieved through the following technical solutions:
Utilize sand return to return a method for standby multi-usage solid slag made of stones, comprise step:
Step 1, first sand return is returned to stone fragmentation, grinding becomes sand return to return stone flour, in water, soak and within 0.5 to 14 day, clear up the calcium oxide of burning;
Step 2, the sand return from clearing up are returned Separation and Recovery in stone flour and are gone out the calcium hydroxide of producing for Chemicals;
Surplus material after step 3, Separation and Recovery calcium hydroxide is solid slag.
When further, stone flour immersion is returned in sand return in described step 1, also carry out intermittent stirring.
Further, also comprise step: step 4, the solid slag that step 3 is obtained dewater, drying treatment, obtain dry solid slag.
Further, also comprise step: step 5, dry solid slag is carried out to fragmentation, grinding process, obtain the solid slag of dry powder.
The present invention also provides the application of described solid slag, and described solid slag is as the mixing material of fume desulfurizing agent, alkaline residue dechlorinating agent, cement, mineral admixture, the filler that replacement Wingdale is used for manufacture of cement, concrete and mortar.
Further, when the mixing material as cement, replacement Wingdale are used for manufacture of cement, described solid slag is dry solid slag.
Further, described solid slag powder is when the mineral admixture as mixing material, concrete and the mortar of cement, filler, fume desulfurizing agent, and described solid slag is dry powder.
Further, when mineral admixture as mixing material, concrete and the mortar of cement, described solid slag can replace and is less than or equals 35% gelling material.
Further, when as alkaline residue dechlorinating agent, solid slag, alkaline residue and water are mixed, after press filtration, can obtain chloride ion content lower than the dechlorination alkaline residue mixture of solid total mass 0.30% in mixture, the dry mass ratio of described solid slag, alkaline residue is 2:8 to 5:5, and quality is 1.5 to 8 times of total dry mass of described solid slag and alkaline residue.
Compared with prior art, tool of the present invention has the following advantages:
(1) effectively solve the problem that burning calcium oxide in stone is returned in sand return, can effectively utilize calcium hydroxide.
(2) sand return is returned stone and is cleared up the solid slag of rear generation and can be used for multiple use, thereby effectively solves processing and recycling problem that stone is returned in sand return.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
embodiment 1
Utilize sand return to return a method for standby multi-usage solid slag made of stones, comprise step:
Step 1, first sand return is returned to stone fragmentation, grinding becomes sand return to return stone flour, soaks the calcium oxide of clearing up burning for 0.5 day in water, also carries out intermittent stirring during bubble, to improve burning calcium oxide oxidation rate;
Step 2, the sand return from clearing up are returned Separation and Recovery in stone flour and are gone out the calcium hydroxide of producing for soda ash;
After step 3, Separation and Recovery calcium hydroxide, surplus material is solid slag.
embodiment 2
Utilize sand return to return a method for standby multi-usage solid slag made of stones, comprise step:
Step 1, first sand return is returned to stone fragmentation, grinding becomes sand return to return stone flour, soaks the calcium oxide of clearing up burning for 3 days in water, also carries out intermittent stirring during bubble, to improve burning calcium oxide oxidation rate;
Step 2, the sand return from clearing up are returned Separation and Recovery in stone flour and are gone out the calcium hydroxide of producing for soda ash;
Step 3, surplus material press filtration after Separation and Recovery calcium hydroxide is obtained to solid slag;
Step 4, the solid slag that step 3 is obtained carry out drying treatment, obtain dry solid slag.
embodiment 3
Utilize sand return to return a method for standby multi-usage solid slag made of stones, comprise step:
Step 1, first sand return is returned to stone fragmentation, grinding becomes sand return to return stone flour, soaks the calcium oxide of clearing up burning for 14 days in water, also carries out intermittent stirring during bubble, to improve burning calcium oxide oxidation rate;
Step 2, the sand return from clearing up are returned Separation and Recovery in stone flour and are gone out the calcium hydroxide of producing for Chemicals;
Step 3, surplus material press filtration after Separation and Recovery calcium hydroxide is obtained to solid slag;
Step 4, the solid slag that step 3 is obtained carry out drying treatment, obtain dry solid slag;
Step 5, dry solid slag is carried out to fragmentation, grinding process, obtain the solid slag of dry powder.
embodiment 4
Described solid slag is applied as alkaline residue dechlorinating agent, solid slag, alkaline residue and water are mixed, after press filtration, obtaining chloride ion content is the dechlorination alkaline residue of solid total mass 0.05% in mixture, mass percent in material, described mixture is comprised of following component: the ratio that stone flour (butt) and alkaline residue (butt) are returned in the sand return after clearing up is 5:5, and water total mass is 3 times that stone flour (butt) and alkaline residue (butt) total mass are returned in the sand return after clearing up.
embodiment 5
Described solid slag is applied as alkaline residue dechlorinating agent, solid slag, alkaline residue and water are mixed, after press filtration, obtaining chloride ion content is the dechlorination alkaline residue of solid total mass 0.08% in mixture, mass percent in material, described mixture is comprised of following component: the ratio that stone flour (butt) and alkaline residue (butt) are returned in the sand return after clearing up is 3:7, and water total mass is 7 times that stone flour (butt) and alkaline residue (butt) total mass are returned in the sand return after clearing up.
embodiment 6
Described solid slag is applied as alkaline residue dechlorinating agent, solid slag, alkaline residue and water are mixed, after press filtration, obtain chloride ion content lower than the dechlorination alkaline residue of solid total mass 0.09% in mixture, mass percent in material, described mixture is comprised of following component: the ratio that stone flour (butt) and alkaline residue (butt) are returned in the sand return after clearing up is 2:8, and water total mass is 10 times that stone flour (butt) and alkaline residue (butt) total mass are returned in the sand return after clearing up.
embodiment 7
Described solid slag during as the application of concrete mineral admixture, is dry powder, and now, solid slag can replace and is less than or equals to surpass 35% gelling material.
embodiment 8
When described solid slag is applied as the mixing material of cement, be dry powder, now, described solid slag can replace the gelling material that is no more than 35%.
embodiment 9
Described solid slag is as the application of fume desulfurizing agent, and now solid slag is dry powder.When as fume desulfurizing agent, the limestone powder of alternative original use, energy-conserving and environment-protective.
embodiment 10
Described solid slag is as mineral admixture when application of mortar, and now solid slag is dry powder, is less than 10% more than 80 tm screen of described solid slag, can replace the gelling material that is no more than 35%.
embodiment 11
Described solid slag is for manufacture of cement, and now solid slag is dry solid slag, the Wingdale of alternative original use, energy-conserving and environment-protective.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not limited by the examples; other any do not deviate from change, the modification done under spirit of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (9)
1. utilize sand return to return a method for standby multi-usage solid slag made of stones, it is characterized in that, comprise step:
Step 1, first sand return is returned to stone fragmentation, grinding becomes sand return to return stone flour, in water, soak and within 0.5 to 14 day, clear up the calcium oxide of burning;
Step 2, the sand return from clearing up are returned Separation and Recovery in stone flour and are gone out the calcium hydroxide of producing for Chemicals;
Surplus material after step 3, Separation and Recovery calcium hydroxide is solid slag.
2. method according to claim 1, is characterized in that, also carries out intermittent stirring when stone flour immersion is returned in sand return in described step 1.
3. according to the method described in claim 1 and 2, it is characterized in that, also comprise step:
Step 4, the solid slag that step 3 is obtained dewater, drying treatment, obtain dry solid slag.
4. method according to claim 3, is characterized in that, also comprises step:
Step 5, dry solid slag is carried out to fragmentation, grinding process, obtain the solid slag of dry powder.
5. the application of the solid slag of preparing according to the method described in claim 1 to 4 any one, it is characterized in that, described solid slag is as the mixing material of fume desulfurizing agent, alkaline residue dechlorinating agent, cement, mineral admixture, the filler that replacement Wingdale is used for manufacture of cement, concrete and mortar.
6. application according to claim 5, is characterized in that, when the mixing material as cement, replacement Wingdale are used for manufacture of cement, described solid slag is dry solid slag.
7. application according to claim 5, is characterized in that, when the mineral admixture as mixing material, concrete and the mortar of cement, filler, fume desulfurizing agent, described solid slag is dry powder.
8. according to the application described in claim 6 or 7, it is characterized in that, when mineral admixture as mixing material, concrete and the mortar of cement, described solid slag can replace and is less than or equals 35% gelling material.
9. application according to claim 5, it is characterized in that, when as alkaline residue dechlorinating agent, solid slag, alkaline residue and water are mixed, after press filtration, can obtain chloride ion content lower than the dechlorination alkaline residue mixture of solid total mass 0.30% in mixture, the dry mass ratio of described solid slag, alkaline residue is 2:8 to 5:5, and quality is 1.5 to 8 times of total dry mass of described solid slag and alkaline residue.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104190690A (en) * | 2014-08-06 | 2014-12-10 | 华南理工大学 | Method for preparing chlorine-removal alkali residue mixture by utilizing alkali residues through ammonia-soda process and application of chlorine-removal alkali residue mixture |
| CN106167362A (en) * | 2016-07-15 | 2016-11-30 | 华南理工大学 | A kind of alkaline residue water-retaining agent and preparation method and application |
| CN106186767A (en) * | 2016-07-15 | 2016-12-07 | 华南理工大学 | A kind of inorganic particle water-retaining agent and preparation method and application |
| CN106220018A (en) * | 2016-07-15 | 2016-12-14 | 华南理工大学 | Preparation method and application are dried in the revolution of a kind of inorganic particle water-retaining agent |
| CN108863118A (en) * | 2018-08-15 | 2018-11-23 | 淮安市水泥厂有限公司 | A kind of alkaline residue cement superfine powder and preparation method thereof |
| CN111454003A (en) * | 2020-04-29 | 2020-07-28 | 山东海天生物化工有限公司 | Method for recycling return sand in soda production |
| CN111977993A (en) * | 2019-05-21 | 2020-11-24 | 江苏苏盐井神股份有限公司 | Device and method for performing desulfurization or ash melting on returned stone and returned sand pulping in soda production |
| CN112573553A (en) * | 2020-10-26 | 2021-03-30 | 山东海天生物化工有限公司 | Method for recycling returned sand in soda production |
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| CN101774620A (en) * | 2009-12-31 | 2010-07-14 | 常熟大众钙化物有限公司 | Method for preparing high-specific surface area calcium hydroxide for dry desulphurization |
| CN103508478A (en) * | 2013-06-05 | 2014-01-15 | 池州灵芝化建材料科技有限公司 | Method used for preparing calcium hydroxide from light calcium carbonate and active calcium oxide defective products |
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| JPH11189411A (en) * | 1997-12-25 | 1999-07-13 | Chiyoda Engineering Kk | Treatment of waste fluid |
| CN101774620A (en) * | 2009-12-31 | 2010-07-14 | 常熟大众钙化物有限公司 | Method for preparing high-specific surface area calcium hydroxide for dry desulphurization |
| CN103508478A (en) * | 2013-06-05 | 2014-01-15 | 池州灵芝化建材料科技有限公司 | Method used for preparing calcium hydroxide from light calcium carbonate and active calcium oxide defective products |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104190690A (en) * | 2014-08-06 | 2014-12-10 | 华南理工大学 | Method for preparing chlorine-removal alkali residue mixture by utilizing alkali residues through ammonia-soda process and application of chlorine-removal alkali residue mixture |
| CN104190690B (en) * | 2014-08-06 | 2016-05-04 | 华南理工大学 | A kind of method and application that utilizes ammonia-soda process alkaline residue to prepare dechlorination alkaline residue mixture |
| CN106167362A (en) * | 2016-07-15 | 2016-11-30 | 华南理工大学 | A kind of alkaline residue water-retaining agent and preparation method and application |
| CN106186767A (en) * | 2016-07-15 | 2016-12-07 | 华南理工大学 | A kind of inorganic particle water-retaining agent and preparation method and application |
| CN106220018A (en) * | 2016-07-15 | 2016-12-14 | 华南理工大学 | Preparation method and application are dried in the revolution of a kind of inorganic particle water-retaining agent |
| CN106167362B (en) * | 2016-07-15 | 2019-01-18 | 华南理工大学 | A kind of alkaline residue water-retaining agent and the preparation method and application thereof |
| CN108863118A (en) * | 2018-08-15 | 2018-11-23 | 淮安市水泥厂有限公司 | A kind of alkaline residue cement superfine powder and preparation method thereof |
| CN111977993A (en) * | 2019-05-21 | 2020-11-24 | 江苏苏盐井神股份有限公司 | Device and method for performing desulfurization or ash melting on returned stone and returned sand pulping in soda production |
| CN111977993B (en) * | 2019-05-21 | 2022-04-12 | 江苏苏盐井神股份有限公司 | Device and method for performing desulfurization or ash melting on returned stone and returned sand pulping in soda production |
| CN111454003A (en) * | 2020-04-29 | 2020-07-28 | 山东海天生物化工有限公司 | Method for recycling return sand in soda production |
| CN112573553A (en) * | 2020-10-26 | 2021-03-30 | 山东海天生物化工有限公司 | Method for recycling returned sand in soda production |
| CN112573553B (en) * | 2020-10-26 | 2023-02-03 | 山东海天生物化工有限公司 | Method for recycling return sand in sodium carbonate production |
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Application publication date: 20141210 |