CN102180636A - Brick making process utilizing titanium gypsum blended with toxic sludge - Google Patents
Brick making process utilizing titanium gypsum blended with toxic sludge Download PDFInfo
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- CN102180636A CN102180636A CN 201110066304 CN201110066304A CN102180636A CN 102180636 A CN102180636 A CN 102180636A CN 201110066304 CN201110066304 CN 201110066304 CN 201110066304 A CN201110066304 A CN 201110066304A CN 102180636 A CN102180636 A CN 102180636A
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Abstract
The invention relates to recycling treatment of industrial wastes, in particular to a brick making process utilizing titanium gypsum blended with toxic sludge. The toxic sludge is treated by dehydration and detoxification, and dried to obtain dry sludge; and ratios of raw materials are as follows: 50-70 portions of titanium gypsum, 20-30 portions of dry sludge, 10-20 portions of active mineral raw material, 2-6 portions of exciting agent, 0.5-1 portion of early strength agent and 1-2 portions of water reducing agent. The raw materials are evenly mixed, then water is added, and mixture is evenly stirred and then pressed to be molded by a brick making machine, thus obtaining green bricks; and finished product bricks can be made after the green bricks are naturally cured for a certain period of time. The titanium gypsum and the toxic sludge are utilized for making bricks, so as to change wastes into valuables, and develop recycling economy. The industrial wastes can be utilized by adjusting measures to local conditions, so as to effectively protect water and soil resources, and control environmental pollution. Therefore, the brick making process has significant environmental, economic and social benefits.
Description
Technical field
The present invention relates to a kind of disposal of resources of trade waste, specifically is the poisonous making brick from sludge technology 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 the titanium gypsum, in the 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, the poisonous making brick from sludge technology 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 ".
Technical scheme of the present invention is: the poisonous making brick from sludge technology of a kind of titanium gypsum fusion, and concrete steps are as follows:
(1), titanium gypsum 150～170 ℃ of dry reaction 3～6h in baking oven, again through vibration screening;
(2), poisonous mud through the dehydration detoxification treatment after, drying obtains dewatered sludge again; Grinding sieves;
(3), brick-making raw material, constitute by following weight part proportioning: 50～70 parts in the titanium gypsum behind the dry reaction, 20～30 parts of dewatered sludges, 10～20 parts of active mineral raw materials, 2～6 parts of exciting agents, 0.5～1 part of hardening accelerator, 1～2 part of water reducer, behind the siccative mixing, water mixing again, stir;
(4), with the compression moulding of brick machine, make adobe;
(5), after the natural curing, make light cinder brick.
The described drying temperature of preferred steps (2) is 105～110 ℃, and be 6～12h time of drying.
Preferred described active mineral raw material is at least a kind of in water-granulated slag, phosphorus slag, the rubble end; Described exciting agent is at least a kind of in lime, saltcake, Sodium sulfate anhydrous.min(99) or the alum; Described hardening accelerator is at least sodium sulfate, a kind of in calcium chloride or the calcium formiate; Described water reducer is at least a kind of in sodium lignosulfonate, calcium lignin sulphonate or the Sunmorl N 60S.
Preferred above-mentioned titanium gypsum in baking oven after the drying again through vibrating 150～250 mesh sieves; Dewatered sludge is crossed 40～80 mesh sieves through grinding; The active mineral raw material is crossed 40～80 mesh sieves through grinding in advance before batching.
The preferred described amount of water control water cement ratio ratio of brick-making raw material total mass (water with) is 1: 4～6.
Preferred described natural curing is wet adobe piling 12～24 hours, delivers to work in-process field watering 5～10 days again, and the natural curing that stops then watering can make finished bricks after 5～15 days.
Wherein, above-mentioned poisonous sludge dewatering detoxification treatment is handled with reference to inventor's patent of invention CN 101973686A " poisonous mud dewater synchronously poison-removing method ".
The leaching toxotest of finished bricks, each index concentration are 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:
Before batching, the titanium gypsum is regrinded and is carefully crossed 200 mesh sieves at 150 ℃ of dry reaction 5h; Mud after the dehydration detoxification obtains dewatered sludge through 110 ℃ of dry 6h; Dewatered sludge, rubble end, phosphorus slag are crossed 50 mesh sieves before batching.
The prescription of present embodiment:
Titanium gypsum 68kg dewatered sludge 21kg
Rubble end 5kg phosphorus slag 12kg
Lime 1kg saltcake 2kg
Calcium formiate 0.8kg
Calcium lignin sulphonate 1.9kg
The raw material of above-mentioned formula ratio is mixed, add 21kg water again and mix;
Above-mentioned material is placed in the mould, use brick press compression moulding, make adobe; Wet adobe piling 12 hours is delivered to work in-process field watering 4 days again, and the natural curing that stops then watering can make finished bricks after 10 days, and every technical indicator sees Table 1.
Embodiment 2:
Before batching, the titanium gypsum is at 170 ℃ of dry reaction 2h, after 150 mesh sieves; Mud after the dehydration detoxification obtains dewatered sludge through 105 ℃ of dry 12h; Dewatered sludge, rubble end, phosphorus slag are crossed 40 mesh sieves before batching.
The prescription of present embodiment:
Titanium gypsum 50kg dewatered sludge 22kg
Rubble end 8kg phosphorus slag 9kg
Sodium sulfate anhydrous.min(99) 2kg lime 1.5kg
Calcium chloride 0.5kg calcium formiate 0.4kg
Sodium lignosulfonate 1.5kg
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; Wet adobe piling 18 hours is delivered to work in-process field watering 5 days again, and the natural curing that stops then watering can make finished bricks after 9 days, and every technical indicator sees Table 1.
Embodiment 3:
Before batching, the titanium gypsum is at 160 ℃ of dry reaction 4h, after 250 mesh sieves; Mud after the dehydration detoxification obtains dewatered sludge through 107 ℃ of dry 10h; Dewatered sludge, rubble end, phosphorus slag, water-granulated slag are crossed 80 mesh sieves before batching.
The prescription of present embodiment:
Titanium gypsum 55kg dewatered sludge 25kg
Rubble end 5kg phosphorus slag 7kg water-granulated slag 4kg
Sodium sulfate anhydrous.min(99) 1kg saltcake 0.5kg alum 1.5kg
Sodium sulfate 1kg
Sunmorl N 60S 1kg calcium lignin sulphonate 0.2kg
The raw material of above-mentioned formula ratio is mixed, add 25kg water again and mix;
Above-mentioned material is placed in the mould, use brick press compression moulding, make adobe; Wet adobe piling 24 hours is delivered to work in-process field watering 8 days again, and the natural curing that stops then watering can make finished bricks after 10 days.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 | 12.8 | 14.0 | 13.1 |
| Folding strength/MPa | 2.35 | 2.44 | 2.37 |
| Dry shrinkage/mmm -1 | 0.55 | 0.46 | 0.49 |
| Water-intake rate/% | 15 | 13 | 14 |
| Freezing situation | No freezing | No freezing | No freezing |
Claims (7)
1. the poisonous making brick from sludge technology of titanium gypsum fusion, concrete steps are as follows:
(1), titanium gypsum 150～170 ℃ of dry reaction 3～6h in baking oven, again through vibration screening;
(2), poisonous mud through the dehydration detoxification treatment after, drying obtains dewatered sludge again; Grinding sieves;
(3), brick-making raw material, constitute by following weight part proportioning: 50～70 parts in the titanium gypsum behind the dry reaction, 20～30 parts of dewatered sludges, 10～20 parts of active mineral raw materials, 2～6 parts of exciting agents, 0.5～1 part of hardening accelerator, 1～2 part of water reducer, behind the siccative mixing, water mixing again, stir;
(4), with the compression moulding of brick machine, make adobe;
(5), after the natural curing, make light cinder brick.
2. technology according to claim 1 is characterized in that the described drying temperature of step (2) is 105～110 ℃, and be 6～12h time of drying.
3. technology according to claim 1 is characterized in that described active mineral raw material is at least a kind of in water-granulated slag, phosphorus slag, the rubble end.
4. technology according to claim 1 is characterized in that described exciting agent is at least a kind of in lime, saltcake, Sodium sulfate anhydrous.min(99) or the alum; Described hardening accelerator is at least sodium sulfate, a kind of in calcium chloride or the calcium formiate; Described water reducer is at least a kind of in sodium lignosulfonate, calcium lignin sulphonate or the Sunmorl N 60S.
5. technology according to claim 1, it is characterized in that the titanium gypsum in baking oven after the drying again through vibrating 150～250 mesh sieves; Dewatered sludge is crossed 40～80 mesh sieves through grinding; The active mineral raw material is crossed 40～80 mesh sieves through grinding in advance before batching.
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: 4～6.
7. according to the described technology of claim 1, it is characterized in that described natural curing is wet adobe piling 12～24 hours, deliver to work in-process field watering 5～10 days again, the natural curing that stops then watering can make finished bricks after 5～15 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110066304 CN102180636B (en) | 2011-03-18 | 2011-03-18 | Brick making process utilizing titanium gypsum blended with toxic sludge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110066304 CN102180636B (en) | 2011-03-18 | 2011-03-18 | Brick making process utilizing titanium gypsum blended with toxic sludge |
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| CN102180636B CN102180636B (en) | 2012-12-19 |
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Cited By (6)
| 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 |
| CN102936126A (en) * | 2012-10-15 | 2013-02-20 | 徐立萧 | Preparation methods for standard brick material and standard brick |
| CN103043985A (en) * | 2013-01-13 | 2013-04-17 | 济南大学 | Titanium gypsum composite binding material and preparation method thereof |
| 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 |
| CN112694305A (en) * | 2020-12-17 | 2021-04-23 | 甘肃土木工程科学研究院有限公司 | Soil remediation type ecological slope protection brick |
| CN115196934A (en) * | 2022-06-28 | 2022-10-18 | 宁波佰跃再生资源有限公司 | Titanium gypsum baking-free brick and preparation process thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1526529A (en) * | 2003-09-22 | 2004-09-08 | 济南大学 | No-baking brick made of oil field sludge and its production process |
| CN101234882A (en) * | 2008-02-22 | 2008-08-06 | 赵静 | Floor brick prepared from oil field sludge |
| CN101289310A (en) * | 2008-03-24 | 2008-10-22 | 昆明理工大学 | Low-temperature ceramic permeable bricks and production method thereof |
-
2011
- 2011-03-18 CN CN 201110066304 patent/CN102180636B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1526529A (en) * | 2003-09-22 | 2004-09-08 | 济南大学 | No-baking brick made of oil field sludge and its production process |
| CN101234882A (en) * | 2008-02-22 | 2008-08-06 | 赵静 | Floor brick prepared from oil field sludge |
| CN101289310A (en) * | 2008-03-24 | 2008-10-22 | 昆明理工大学 | Low-temperature ceramic permeable bricks and production method thereof |
Cited By (8)
| 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 |
| CN102936126A (en) * | 2012-10-15 | 2013-02-20 | 徐立萧 | Preparation methods for standard brick material and standard brick |
| CN103043985A (en) * | 2013-01-13 | 2013-04-17 | 济南大学 | Titanium gypsum composite binding material and preparation method thereof |
| CN103043985B (en) * | 2013-01-13 | 2015-03-04 | 济南大学 | Titanium gypsum composite binding material and preparation method thereof |
| 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 |
| CN112694305A (en) * | 2020-12-17 | 2021-04-23 | 甘肃土木工程科学研究院有限公司 | Soil remediation type ecological slope protection brick |
| CN115196934A (en) * | 2022-06-28 | 2022-10-18 | 宁波佰跃再生资源有限公司 | Titanium gypsum baking-free brick and preparation process thereof |
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| Publication number | Publication date |
|---|---|
| CN102180636B (en) | 2012-12-19 |
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Effective date of registration: 20230327 Address after: 211816 Puzhu South Road, Nanjing, Jiangsu 30 Patentee after: NANJING University OF TECHNOLOGY Address before: No. 606, ningliu Road, Nanjing Chemical Industrial Park, Nanjing, Jiangsu 210047 Patentee before: NANJING CHEMICAL INDUSTRY PARK ENVIRONMENTAL PROTECTION INDUSTRY COLLABORATIVE INNOVATION Co.,Ltd. |