CN102206070A - Process for producing brick by virtue of steam curing of titanium gypsum doped poisonous sludge - Google Patents
Process for producing brick by virtue of steam curing of titanium gypsum doped poisonous sludge Download PDFInfo
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- CN102206070A CN102206070A CN201110065814.XA CN201110065814A CN102206070A CN 102206070 A CN102206070 A CN 102206070A CN 201110065814 A CN201110065814 A CN 201110065814A CN 102206070 A CN102206070 A CN 102206070A
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- Prior art keywords
- brick
- titanium gypsum
- parts
- sludge
- poisonous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 40
- 239000010440 gypsum Substances 0.000 title claims abstract description 40
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 239000010936 titanium Substances 0.000 title claims abstract description 37
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 37
- 239000010802 sludge Substances 0.000 title claims abstract description 25
- 239000011449 brick Substances 0.000 title claims abstract description 20
- 231100000614 poison Toxicity 0.000 title claims abstract description 19
- 230000007096 poisonous effect Effects 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 9
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 7
- 239000011707 mineral Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 3
- 238000005516 engineering process Methods 0.000 claims description 21
- 239000002994 raw material Substances 0.000 claims description 15
- 239000002893 slag Substances 0.000 claims description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 8
- 239000011574 phosphorus Substances 0.000 claims description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims description 8
- 238000001784 detoxification Methods 0.000 claims description 7
- 230000018044 dehydration Effects 0.000 claims description 6
- 238000006297 dehydration reaction Methods 0.000 claims description 6
- 238000000748 compression moulding Methods 0.000 claims description 5
- 230000004927 fusion Effects 0.000 claims description 5
- 229940037003 alum Drugs 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 229940056729 sodium sulfate anhydrous Drugs 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 229960003010 sodium sulfate Drugs 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- 239000004567 concrete Substances 0.000 claims description 2
- 239000012634 fragment Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 239000002440 industrial waste Substances 0.000 abstract description 4
- 239000002689 soil Substances 0.000 abstract description 4
- 239000004566 building material Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 7
- 239000004568 cement Substances 0.000 description 6
- 238000011160 research Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 239000002920 hazardous waste Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 235000010215 titanium dioxide Nutrition 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000007385 chemical modification Methods 0.000 description 2
- -1 tailings Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 239000003905 agrochemical Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000001038 titanium pigment Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a reclamation treatment of industrial wastes and in particular relates to a process for producing a brick by virtue of steam curing of titanium gypsum doped poisonous sludge. The process comprises the following steps: dehydrating and detoxifying poisonous sludge, and then drying so as to obtain dried sludge; evenly mixing dried materials, blending a proper amount of water, evenly stirring, and carrying out press formation by virtue of a brick machine so as to obtain an unburned brick, wherein the dried materials comprise the following components in parts by weight: 50-70 parts of titanium gypsum (dry basis), 20-30 parts of dried sludge, 10-20 parts of active raw mineral materials and 2-6 parts of excitant; putting the unburned brick in a steam curing device, pressurizing the steam curing device to carry out curing for 2-6 hours, wherein the steam temperature is 150-170 DGE C, and the pressure is 0.2-1.2MPa; and standing and drying in the air, so that a finished steam curing brick is manufactured. In the process, the titanium gypsum and industrial dried sludge are utilized so as to produce a novel ecological building material; and industrial wastes are utilized according to practicable conditions, thereby effectively protecting water and soil resources and controlling environment pollution. The process has significant environmental, economical and social benefits.
Description
Technical field
The present invention relates to a kind of disposal of resources of trade waste, specifically is the technology of the steam-cured brickmaking of the poisonous mud of a kind of titanium gypsum fusion.
Background technology
The titanium gypsum is when adopting Titanium White Production By Sulfuric Acid Process, is to administer acid waste water, adds Wingdale or carbide slag neutralizing acid wastewater and the waste residue that produces, and the titanium gypsum is chemical by-product gypsum, and its main component is CaSO
42H
2O content reaches more than 80%.The titanium gypsum is a kind of of chemical gypsum, produce 1 ton of sulfuric acid method titanium pigment and produce 6～10 tons of titanium gypsum (water ratio 40～50%) approximately, China's titanium white powder production capacity is 2,300,000 tons/year at present, 1,500,000 tons of output, the annual up to ten million tons of titanium gypsum that produce, and the titanium dioxide production capacity continues to increase considerably, and the titanium gypsum is used for outside the cement setting retarder on a small quantity, does not almost obtain bigger utilization.The discharging of titanium gypsum not only takies a large amount of soils, contaminate environment again.Because be subjected to the flushing of rainwater, the titanium gypsum of piling up on the field can run off, the titanium gypsum is piled up after the Exposure to Sunlight wind simultaneously, and small part can be flown away in atmosphere with Powdered, and is deposited to the foreign object surface that may touch, not only contaminate environment but also pose a health risk.If can effectively utilize to the titanium gypsum, not only can protect the consumption of environment, saving soil, minimizing Nonrenewable resources, also can be enterprise simultaneously and bring economic benefit.
The titanium gypsum contains the solubility salt, easily permeates the ground after drenching, and enters the surface water system, the meeting influence ecological environment; Top layer, the big area stockyard efflorescence of can dewatering is simultaneously met monsoon and can be produced airborne dust, influences plant growth and surrounding enviroment.At present, utilize the research of titanium gypsum brickmaking to rarely have report, in titanium gypsum brickmaking process, can consume other industrial wastes (as: poisonous mud, water-granulated slag, rubble end etc.) simultaneously and will have prior meaning.
The mud of chemical industry is not only bulky, and organic poison content height, and particle is thin, is cotton-shaped colloidal structure, has high-hydrophilic.The excess sludge that generation every day of China's chemical enterprise is tens thousand of tons, because of it contains organic poisonous substance, " national Hazardous wastes register " regulation according to the up-to-date promulgation of China, the excess sludge that produces in the chemical industry wastewater treatment process such as agricultural chemicals is dangerous solid waste, must send the Hazardous wastes disposal center of qualification to focus on, usually adopt incineration disposal, disposal costs is high.Therefore, inventing more effective sludge treatment and resource technology, is the problem that presses for solution.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, propose the technology of the steam-cured brickmaking of the poisonous mud of a kind of titanium gypsum fusion, the present invention utilizes titanium gypsum and other industrial wastes, adopts the unburned knot technology generation of chemical modification for traditional technology, produce the novel ecological building materials, realize " turning waste into wealth ".Have great environment, economic and social benefit.
Technical scheme of the present invention is: the technology of the steam-cured brickmaking of the poisonous mud of a kind of titanium gypsum fusion, and concrete steps are as follows:
(1), poisonous mud through the dehydration detoxification treatment after, drying obtains dewatered sludge again;
(2), brick-making raw material is levigate, constitute by following weight part proportioning: 50～70 parts in titanium gypsum (butt), 20～30 parts of dewatered sludges, 10～20 parts of active mineral raw materials, 2～6 parts of exciting agents behind the siccative mixing, water mixing again, stir;
(3) with the compression moulding of brick machine, make adobe;
(4) place steam curing apparatus, the steam under pressure maintenance;
(5) fragment of brick that finishes of vapor cure leaves standstill to dry and promptly makes finished bricks.
Drying temperature described in the preferred steps (1) is 105～110 ℃, and be 6～12h time of drying.
Preferred described dewatered sludge is through levigate mistake 40～80 mesh sieves; The titanium gypsum before batching through levigate mistake 150～250 mesh sieves; The active mineral raw material is in advance through levigate mistake 40～80 mesh sieves.
Preferred described active mineral raw material is at least a kind of in phosphorus slag, rubble end or the tailings; Described exciting agent is at least a kind of in lime, Sodium sulfate anhydrous.min(99), sodium sulfate or the alum.
Preferred above-mentioned amount of water control water cement ratio (water and brick-making raw material total mass ratio) is 1: 4～7.
Described vapor cure: in temperature is 150 ℃～170 ℃, and pressure is under 0.2～1.2MPa, with the vapor cure time be 2～6h.
Wherein, poisonous sludge dewatering detoxification treatment is to handle with reference to inventor's patent of invention CN 101973686A " poisonous mud dewater synchronously poison-removing method ".
The finished bricks that the present invention makes leaches toxotest, and each index concentration is all well below the middle concentration value that limits of GB 5085.3-2007 (the Hazardous wastes judging standard leaches toxicity and differentiates).
Beneficial effect:
1., existing research mainly is that the titanium gypsum is used to prepare cement setting retarder or consolidating material, rarely has report with the research of titanium gypsum brickmaking.
2., poisonous mud is the excess sludge that produces after the sewage disposal of chemical plant, Nanjing, after the dehydration detoxification treatment, obtains general mud; Drying obtains dewatered sludge again.In technology, utilize poisonous mud not appear in the newspapers as yet as raw-material research with the brickmaking of titanium gypsum.
3., in the process of gypsum brickmaking, existing research uses cement as auxiliary material mostly, and the volume of cement is up to about 10%; The present invention, need not to add cement, clay, sand etc., thereby have novelty in the selection of raw material as auxiliary material with trade wastes such as phosphorus slag, rubble end, tailings.
Utilize titanium gypsum and poisonous mud; adopt the unburned knot technology generation of chemical modification for traditional technology; produce the novel ecological building materials; the land productivity usefulness of can not only suiting measures to local conditions trade waste (as: poisonous mud, phosphorus slag, rubble end etc.); effectively protect water and soil resources; the pollution that controls environment can also be developed a circular economy.Have great environment, economic and social benefit.
Embodiment
Embodiment 1:
Mud after the dehydration detoxification obtains dewatered sludge through 110 ℃ of dry 6h; Dewatered sludge, rubble end, tailings are crossed 40 mesh sieves before batching is levigate; The titanium gypsum is levigate mistake 150 mesh sieves before batching;
The prescription of present embodiment:
Titanium gypsum 53kg dewatered sludge 24kg
Rubble end 15kg tailings 3kg
Lime 2kg alum 1kg
Preparation technology: the raw material of above-mentioned formula ratio is mixed, add 20kg water again and mix;
Above-mentioned material is placed in the mould, use brick press compression moulding, make adobe; Placing steam curing apparatus, is 150 ℃ in temperature, under the 0.5MPa pressure, behind vapor cure 6h, makes finished bricks, and every technical indicator sees Table 1.
Embodiment 2:
Mud after the dehydration detoxification obtains dewatered sludge through 105 ℃ of dry 12h; Dewatered sludge, tailings, phosphorus slag be levigate mistake 50 mesh sieves before batching; The titanium gypsum is levigate mistake 200 mesh sieves before batching;
The prescription of present embodiment:
Titanium gypsum 65kg dewatered sludge 25kg
Tailings 10kg phosphorus slag 5kg
Sodium sulfate 0.5kg Sodium sulfate anhydrous.min(99) 2.5kg
Preparation technology: the raw material of above-mentioned formula ratio is mixed, add 18kg water again and mix;
Above-mentioned material is placed in the mould, use brick press compression moulding, make adobe; Placing steam curing apparatus, is 160 ℃ in temperature, under the 0.8MPa pressure, behind vapor cure 2h, makes finished bricks, and every technical indicator sees Table 1.
Embodiment 3:
Mud after the dehydration detoxification obtains dewatered sludge through 108 ℃ of dry 8h; Dewatered sludge, rubble end, phosphorus slag be levigate mistake 80 mesh sieves before batching; The titanium gypsum is levigate mistake 250 mesh sieves before batching;
Titanium gypsum 67kg dewatered sludge 22kg
Rubble end 8kg phosphorus slag 6kg
Sodium sulfate anhydrous.min(99) 2kg alum 2kg
Preparation technology: the raw material of above-mentioned formula ratio is mixed, add 16kg water again and mix;
Above-mentioned material is placed in the mould, use brick press compression moulding, make adobe; Placing steam curing apparatus, is 170 ℃ in temperature, under the 1MPa pressure, behind vapor cure 5h, makes finished bricks, and every technical indicator sees Table 1.
Every index detected result of brick among table 1 embodiment
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Ultimate compression strength/MPa | 18.4 | 21.3 | 19.2 |
| Folding strength/MPa | 3.1 | 4.0 | 3.7 |
| Dry shrinkage/mmm -1 | 0.44 | 0.35 | 0.41 |
| Water-intake rate/% | 13 | 11 | 12 |
| Freezing situation | No freezing | No freezing | No freezing |
Claims (7)
1. the technology of the steam-cured brickmaking of the poisonous mud of titanium gypsum fusion, concrete steps are as follows:
(1), poisonous mud through the dehydration detoxification treatment after, drying obtains dewatered sludge again;
(2), brick-making raw material is levigate, constitute by following weight part proportioning: 50～70 parts in titanium gypsum, 20～30 parts of dewatered sludges, 10～20 parts of active mineral raw materials, 2～6 parts of exciting agents behind the siccative mixing, water mixing again, stir;
(3), with the compression moulding of brick machine, make adobe;
(4), place steam curing apparatus, steam under pressure maintenance;
(5), the fragment of brick that finishes of vapor cure leaves standstill to dry and promptly makes finished bricks.
2. technology according to claim 1 is characterized in that the drying temperature described in the step (1) is 105～110 ℃, and be 6～12h time of drying.
3. technology according to claim 1 is characterized in that described dewatered sludge is through levigate mistake 40～80 mesh sieves; The titanium gypsum before batching through levigate mistake 150～250 mesh sieves; The active mineral raw material is in advance through levigate mistake 40～80 mesh sieves.
4. technology according to claim 1 is characterized in that described active mineral raw material is at least a kind of in phosphorus slag, rubble end or the tailings.
5. technology according to claim 1 is characterized in that described exciting agent is at least a kind of in lime, Sodium sulfate anhydrous.min(99), sodium sulfate or the alum.
6. technology according to claim 1 is characterized in that described amount of water control water and brick-making raw material total mass ratio are 1: 4～7.
7. technology according to claim 1 is characterized in that described vapor cure: in temperature is 150 ℃～170 ℃, and pressure is under 0.2～1.2MPa, with the vapor cure time be 2～6h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110065814.XA CN102206070A (en) | 2011-03-18 | 2011-03-18 | Process for producing brick by virtue of steam curing of titanium gypsum doped poisonous sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110065814.XA CN102206070A (en) | 2011-03-18 | 2011-03-18 | Process for producing brick by virtue of steam curing of titanium gypsum doped poisonous sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102206070A true CN102206070A (en) | 2011-10-05 |
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ID=44695171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110065814.XA Pending CN102206070A (en) | 2011-03-18 | 2011-03-18 | Process for producing brick by virtue of steam curing of titanium gypsum doped poisonous sludge |
Country Status (1)
| Country | Link |
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| CN (1) | CN102206070A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367203A (en) * | 2011-10-12 | 2012-03-07 | 无锡晨驰江河科技有限公司 | Production process of sludge brick |
| CN103951298A (en) * | 2014-04-24 | 2014-07-30 | 三峡大学 | Method for preparing titanium gypsum-based composite gel material and application of material in drying sludge |
| CN114538873A (en) * | 2022-01-26 | 2022-05-27 | 河南三林建设集团有限公司 | Process method for preparing autoclaved brick by utilizing sludge |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1792898A (en) * | 2005-11-22 | 2006-06-28 | 刘茂平 | Solidified agent for drilling well waste mud |
| CN101348340A (en) * | 2008-09-12 | 2009-01-21 | 镇江沃地新材料投资有限公司 | Gypsum based gel material prepared from undisturbed industry by-product gypsum and preparation thereof |
| CN101830613A (en) * | 2010-06-18 | 2010-09-15 | 李玉光 | Method for manufacturing autoclaved sand-lime brick or flyash brick as well as fertilizer and grease by sludge |
-
2011
- 2011-03-18 CN CN201110065814.XA patent/CN102206070A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1792898A (en) * | 2005-11-22 | 2006-06-28 | 刘茂平 | Solidified agent for drilling well waste mud |
| CN101348340A (en) * | 2008-09-12 | 2009-01-21 | 镇江沃地新材料投资有限公司 | Gypsum based gel material prepared from undisturbed industry by-product gypsum and preparation thereof |
| CN101830613A (en) * | 2010-06-18 | 2010-09-15 | 李玉光 | Method for manufacturing autoclaved sand-lime brick or flyash brick as well as fertilizer and grease by sludge |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102367203A (en) * | 2011-10-12 | 2012-03-07 | 无锡晨驰江河科技有限公司 | Production process of sludge brick |
| CN102367203B (en) * | 2011-10-12 | 2012-12-05 | 无锡晨驰江河科技有限公司 | Production process of sludge brick |
| CN103951298A (en) * | 2014-04-24 | 2014-07-30 | 三峡大学 | Method for preparing titanium gypsum-based composite gel material and application of material in drying sludge |
| CN103951298B (en) * | 2014-04-24 | 2015-10-07 | 三峡大学 | A kind of preparation method of titanium gypsum base composite gelled material and the application in dewatered sludge |
| CN114538873A (en) * | 2022-01-26 | 2022-05-27 | 河南三林建设集团有限公司 | Process method for preparing autoclaved brick by utilizing sludge |
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Application publication date: 20111005 |