CN111592313B - Phosphogypsum gypsum plaster board and preparation method thereof - Google Patents

Phosphogypsum gypsum plaster board and preparation method thereof Download PDF

Info

Publication number
CN111592313B
CN111592313B CN201910655207.5A CN201910655207A CN111592313B CN 111592313 B CN111592313 B CN 111592313B CN 201910655207 A CN201910655207 A CN 201910655207A CN 111592313 B CN111592313 B CN 111592313B
Authority
CN
China
Prior art keywords
phosphogypsum
gypsum
board
raw material
clinker
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.)
Active
Application number
CN201910655207.5A
Other languages
Chinese (zh)
Other versions
CN111592313A (en
Inventor
王莹
王鹏起
谭丹君
尹东杰
何亮
简铭
樊惠云
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing New Building Material Group Co Ltd
Original Assignee
Beijing New Building Material Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing New Building Material Group Co Ltd filed Critical Beijing New Building Material Group Co Ltd
Priority to CN201910655207.5A priority Critical patent/CN111592313B/en
Publication of CN111592313A publication Critical patent/CN111592313A/en
Application granted granted Critical
Publication of CN111592313B publication Critical patent/CN111592313B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
    • C04B28/143—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B13/08—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B11/00—Calcium sulfate cements
    • C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/38—Polysaccharides or derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
    • C04B2111/0062—Gypsum-paper board like materials

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention provides an ardealite paper-surface gypsum board and a preparation method thereof. Optionally, the core raw material comprises phosphogypsum clinker, konjac flour, a binder, a waterproof agent, a foaming agent and water. The preparation method comprises the following steps: firstly, crushing and calcining a phosphogypsum raw material to obtain a phosphogypsum clinker; secondly, uniformly stirring the phosphogypsum clinker and the konjac flour to prepare the modified phosphogypsum clinker; adding a binder, a waterproof agent, a foaming agent and water into the modified phosphogypsum clinker, and uniformly mixing to obtain gypsum slurry; then pouring gypsum slurry on the surface protecting paper, and lapping, bonding and molding to prepare a wet plate; and finally, after the wet board is solidified, the wet board enters a dryer, and the preparation of the phosphogypsum gypsum plaster board is completed after drying. The gypsum plaster board prepared by the invention inhibits the migration of alkali metal ions such as potassium, sodium and the like in the phosphogypsum, thereby greatly improving the bonding property between the phosphogypsum and the mask paper of the gypsum board.

Description

Phosphogypsum gypsum plaster board and preparation method thereof
Technical Field
The invention relates to a novel building material technology, relates to a phosphogypsum gypsum plaster board and a preparation method thereof, and particularly relates to a phosphogypsum pretreatment method suitable for producing the gypsum plaster board.
Background
Phosphogypsum is a by-product of phosphoric acid and phosphate fertilizer industry, and produces about 4.5-5.5 tons of phosphogypsum per 1 ton of phosphoric acid produced, and the amount of the substance is about 7 tons. The annual phosphogypsum discharged by phosphate fertilizer chemical enterprises exceeds 1000 million tons, and the accumulated discharge capacity is nearly hundred million tons. The main component of the phosphogypsum is calcium sulfate, and in addition, the phosphogypsum also contains various impurities such as undecomposed phosphorite, phosphoric acid, calcium fluoride, iron, aluminum compounds, acid insoluble substances, organic matters and the like which are not washed clean, and the impurities seriously influence the utilization of the phosphogypsum. At present, most of phosphogypsum is discarded as waste, not only occupies a large amount of land resources, but also causes certain harm to the surrounding atmosphere, soil, water system and human environment, so that the comprehensive utilization of the phosphogypsum is urgent.
The existing process for utilizing the phosphogypsum in a large amount needs pretreatment on the phosphogypsum, and the reason is mainly that impurities in the phosphogypsum have adverse effects on utilization. At present, common phosphogypsum pretreatment methods comprise methods such as water washing, lime neutralization, flotation, flash firing, ball milling, screening and the like. The washing treatment method has higher cost and large one-time investment, and can generate waste water to cause secondary pollution; lime neutralization requires pre-homogenization; other pretreatment methods also have problems such as poor results and low throughput.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The method is low in cost, does not generate wastewater, and can inhibit migration of alkali metal ions such as potassium and sodium in the phosphogypsum, so that the bonding property between the phosphogypsum and the gypsum board mask paper is greatly improved, and the gypsum board with qualified quality is produced.
The invention provides a phosphogypsum-paper-surface gypsum board which comprises a board core and a protective paper, wherein the board core comprises the following raw materials in parts by mass: 100 parts of phosphogypsum clinker and 0.05-1 part of konjak powder.
In the phosphogypsum gypsum plaster board provided by the invention, the raw materials of the board core comprise, by mass: 100 parts of phosphogypsum clinker, 0.05-1 part of konjak powder, 0.3-1 part of binder, 0.1-1 part of waterproof agent, 0.04-0.15 part of foaming agent and 60-80 parts of water.
In the phosphogypsum gypsum plaster board provided by the invention, the phosphogypsum clinker is calcined by a phosphogypsum raw material;
in the phosphogypsum gypsum plaster board provided by the invention, the pH value of the phosphogypsum raw material is 3-7;
in the phosphogypsum gypsum plaster board provided by the invention, impurity ions contained in the phosphogypsum raw material are soluble phosphorus and F-、Mg2+、K+Or Na+One or more of;
in the phosphogypsum gypsum plaster board provided by the invention, the content of the soluble phosphorus in the phosphogypsum raw material is 5000-10000mg/kg and F-The content of the phosphorus gypsum in the phosphogypsum raw material is 400-900Mg/kg and Mg2+The content in the phosphogypsum raw material is 500-1000mg/kg, K+The content of Na and 1200-1600mg/kg in the phosphogypsum raw material+The content in the phosphogypsum raw material is 600-900 mg/kg.
In the phosphogypsum gypsum plasterboard provided by the invention, optionally, the soluble phosphorus comprises H2PO4 -、HPO4 2-、PO4 3-，H2PO4 -The content in the phosphogypsum is 2000-4000mg/kg and HPO4 2-The content in the phosphogypsum is 2000-4000mg/kg or PO4 3-The content in the phosphogypsum is 2000-4000 mg/kg.
In the phosphogypsum gypsum plaster board provided by the invention, the particle size of the konjac flour is 40-200 meshes;
in the phosphogypsum gypsum plaster board provided by the invention, the glucomannan content of the konjac flour is not less than 70 wt.%;
in the phosphogypsum gypsum plaster board provided by the invention, the viscosity of the konjac flour is 13000-28000mPa & s;
in the phosphogypsum gypsum plaster board provided by the invention, the pH value of a 1 wt.% aqueous solution of the konjac flour is 5-7.
In the phosphogypsum gypsum plaster board provided by the invention, the binder is modified starch,
in the phosphogypsum gypsum plasterboard provided by the invention, optionally, the binder is one or more of modified corn starch, modified sorghum starch, modified tapioca starch and modified potato starch.
In the phosphogypsum gypsum plaster board provided by the invention, the water-proofing agent is selected from one or more of emulsified paraffin and organosilicon water-proofing agent.
In the phosphogypsum gypsum plaster board provided by the invention, the foaming agent consists of an anionic surfactant and a foam stabilizer, and the mass ratio of the anionic surfactant to the foam stabilizer is 1 (0.8-1);
in the phosphogypsum gypsum plaster board provided by the invention, the anionic surfactant is selected from one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and sodium fatty alcohol-polyoxyethylene ether sulfate;
in the phosphogypsum gypsum plaster board provided by the invention, the foam stabilizer is selected from one or two of silicone polyether emulsion and polyvinyl alcohol.
On the other hand, the invention provides a preparation method of the phosphogypsum gypsum plasterboard, which comprises the following steps:
1) crushing and calcining the phosphogypsum raw material to obtain phosphogypsum clinker;
2) uniformly stirring the phosphogypsum clinker and the konjac flour to prepare the modified phosphogypsum clinker;
3) adding a binder, a waterproof agent, a foaming agent and water into the modified phosphogypsum clinker, and uniformly mixing to prepare gypsum slurry;
4) pouring the gypsum slurry on the surface protecting paper, and lapping, bonding and molding to prepare a wet plate;
5) and (4) after the wet board is solidified, the wet board enters a drier, and the dried wet board is the thistle board.
In the preparation method of the paper-surface gypsum board provided by the invention, the calcining temperature in the step 1) is 140-180 ℃, and the calcining time is 1-3 h.
In the preparation method of the paper-surface gypsum board provided by the invention, the drying in the step 5) is more than two drying stages with decreasing drying temperature.
In the preparation method of the paper-surface gypsum board provided by the invention, the drying in the step 5) is firstly drying at 210-220 ℃ for 30-40 min, and then drying at 120-130 ℃ to constant weight.
In another aspect, the present invention provides a method for removing impurity ions from phosphogypsum, wherein the method for removing impurity ions from phosphogypsum comprises uniformly mixing phosphogypsum and konjac flour.
Compared with the prior art, the invention has the advantages that:
1. the pretreatment method is simple in process, no wastewater is generated, and the inhibitor konjac flour is a pure natural food-grade raw material, harmless to human bodies and low in price;
2. the konjac flour has a certain reinforcing effect on the thistle board, the mechanical property of the thistle flour is improved to a certain extent, and the quality of the thistle flour meets the national standard requirement.
3. Because the content of potassium ions and sodium ions in the phosphogypsum is far higher than that of natural gypsum and desulfurized gypsum, the problem of poor bonding property of the mask paper is easily generated when the phosphogypsum is used for preparing the gypsum plaster board, even the mask paper can not be bonded in serious cases, and the poor bonding property is a great difficulty for popularizing and applying the phosphogypsum in the gypsum plaster board. The main component of the inhibitor konjac flour in the invention is glucomannan, which can inhibit potassium and sodium ions in phosphogypsum from migrating outwards, thereby greatly improving the bonding property of the gypsum plasterboard. The bonding property of the gypsum board prepared by the phosphogypsum meets the national standard requirement, so that the phosphogypsum can completely replace natural gypsum or desulfurized gypsum to prepare the gypsum board with paper surface, and the method is beneficial to changing waste of the phosphogypsum which is an industrial byproduct into valuable.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the application may be realized and attained by the instrumentalities and methods described in the specification and claims.
Detailed Description
Hereinafter, embodiments of the present application will be described in detail to make objects, technical solutions and advantages of the present application more apparent. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict. The raw materials and reagents used in the following examples are all common commercial products unless otherwise specified.
The embodiment of the invention provides an ardealite gypsum plasterboard, which comprises a board core and a protective paper on the outer side of the board core, wherein the board core comprises the following raw materials in parts by mass: 100 parts of phosphogypsum clinker and 0.05-1 part of konjak powder.
In the embodiment of the invention, the core comprises the following raw materials in parts by mass: 100 parts of phosphogypsum clinker, 0.05-1 part of konjak powder, 0.3-1 part of binder, 0.1-1 part of waterproof agent, 0.04-0.15 part of foaming agent and 60-80 parts of water.
In the embodiment of the invention, the phosphogypsum clinker is prepared by calcining a phosphogypsum raw material;
in the embodiment of the invention, the pH value of the phosphogypsum raw material is 3-7;
in the embodiment of the invention, the impurity ions contained in the phosphogypsum raw material are soluble phosphorus and F-、Mg2+、K+Or Na+One or more of;
in the embodiment of the invention, the content of the soluble phosphorus in the phosphogypsum raw material is 5000-10000mg/kg and F-The content of the phosphorus gypsum in the phosphogypsum raw material is 400-900Mg/kg and Mg2+The content in the phosphogypsum raw material is 500-1000mg/kg, K+The content of Na and 1200-1600mg/kg in the phosphogypsum raw material+The content in the phosphogypsum raw material is 600-900 mg/kg.
In embodiments of the invention, optionally, the soluble phosphorus comprises H2PO4 -、HPO4 2-、PO4 3-，H2PO4 -The content in the phosphogypsum is 2000-4000mg/kg and HPO4 2-The content in the phosphogypsum is 2000-4000mg/kg or PO4 3-The content in the phosphogypsum is 2000-4000 mg/kg.
In the embodiment of the invention, the particle size of the konjac flour is 40-200 meshes;
in the embodiment of the invention, the glucomannan content of the konjac flour is not lower than 70 wt.%;
in the embodiment of the invention, the viscosity of the konjac flour is 13000-28000mPa & s;
in the present example, the 1 wt.% aqueous solution of the konjac flour has a pH of 5 to 7.
In an embodiment of the invention, the binder is a modified starch,
in embodiments of the invention, optionally, the binder is one or more of modified corn starch, modified sorghum starch, modified tapioca starch and modified potato starch.
In the embodiment of the invention, the water-proofing agent is selected from one or more of emulsified paraffin and organosilicon water-proofing agent.
In the embodiment of the invention, the foaming agent consists of an anionic surfactant and a foam stabilizer, and the mass ratio of the anionic surfactant to the foam stabilizer is 1 (0.8-1);
in the embodiment of the invention, the anionic surfactant is selected from one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and sodium fatty alcohol-polyoxyethylene ether sulfate;
in the embodiment of the invention, the foam stabilizer is selected from one or two of silicone polyether emulsion and polyvinyl alcohol.
On the other hand, the embodiment of the invention provides a preparation method of the phosphogypsum gypsum plasterboard, which comprises the following steps:
1) crushing and calcining the phosphogypsum raw material to obtain phosphogypsum clinker;
2) uniformly stirring the phosphogypsum clinker and the konjac flour to prepare the modified phosphogypsum clinker;
3) adding a binder, a waterproof agent, a foaming agent and water into the modified phosphogypsum clinker, and uniformly mixing to prepare gypsum slurry;
4) pouring the gypsum slurry on the surface protecting paper, and lapping, bonding and molding to prepare a wet plate;
5) and (4) after the wet board is solidified, the wet board enters a drier, and the dried wet board is the thistle board.
In the embodiment of the invention, the calcination temperature in the step 1) is 140-.
In the embodiment of the present invention, the drying in step 5) is more than two drying stages with decreasing drying temperatures.
In the embodiment of the invention, the drying in step 5) is firstly drying at 210-220 ℃ for 30-40 min, and then drying at 120-130 ℃ to constant weight.
In another aspect, the present invention provides a method for removing impurity ions from phosphogypsum, wherein the method for removing impurity ions from phosphogypsum comprises uniformly mixing phosphogypsum and konjac flour.
Example 1
In this example, the soluble phosphorus content in the phosphogypsum raw material is 10000 mg/kg; f-The content is 400 mg/kg; mg (magnesium)2 +The content is 1000 mg/kg; k+The content is 1200 mg/kg; na (Na)+The content was 600 mg/kg.
The granularity of the raw material konjak powder is 200 meshes; the viscosity of the konjac flour is 28000mPa & s; the pH of the 1 wt.% aqueous solution was 5; the glucomannan content was 85 wt.%.
The raw material binder is modified corn starch;
the raw material waterproof agent is emulsified paraffin;
the raw material foaming agent is selected from the group consisting of anionic surfactant sodium dodecyl sulfate and foam stabilizer polyvinyl alcohol, and the mass ratio of the anionic surfactant to the foam stabilizer is 1: 0.8; the anionic surfactant is purchased from Jinan Huanyang chemical Co., Ltd, and the foam stabilizer is purchased from Shansheng chemical Co., Ltd, Anqiu, 1788 type;
in this example, the specific steps for preparing the phosphogypsum gypsum plasterboard are as follows:
1) calcining the phosphogypsum raw material at 180 ℃ for 1h, and then carrying out ball milling to obtain semi-hydrated phosphogypsum;
2) weighing 100kg of the obtained semi-hydrated phosphogypsum, adding 0.05kg of konjac flour, and uniformly stirring;
3) then adding 1.0kg of binder, 0.1kg of waterproof agent, 0.04kg of foaming agent and 60kg of water, and uniformly stirring to prepare slurry;
4) the slurry is combined with upper and lower protective paper sheets to form, cut, and finally dried at 210 ℃ for 40min, and then dried at 130 ℃ to constant weight to prepare the paper-surface gypsum board.
The longitudinal breaking load 415N and the transverse breaking load 177N of the obtained paper-surface gypsum board are obtained; the protective paper and the board core are not peeled off, and the bonding performance reaches II level; the product quality meets the performance requirements of national standard GB/T9775-.
Example 2
In this example, the soluble phosphorus content in the phosphogypsum raw material is 8000 mg/kg; f-The content of Mg is 700Mg/kg2+The content is 800mg/kg, K+The content of Na is 1400mg/kg+The content was 700 mg/kg.
The granularity of the raw material konjak powder is 120 meshes; the viscosity of the konjac flour is 23000mPa & s; the pH of the 1 wt.% aqueous solution was 6; the glucomannan content was 80 wt.%.
The raw material adhesive is modified potato starch;
the raw material waterproof agent is emulsified paraffin;
the raw material foaming agent is selected from sodium dodecyl benzene sulfonate serving as an anionic surfactant and a silicon resin polyether emulsion serving as a foam stabilizer, and the mass ratio of the anionic surfactant to the foam stabilizer is 1: 0.9; the anionic surfactant is purchased from Jinan remote chemical industry Co., Ltd, and the foam stabilizer is purchased from Longkou Damai chemical industry Co., Ltd;
in this example, the specific steps for preparing the phosphogypsum gypsum plasterboard are as follows:
1) calcining the phosphogypsum raw material at 150 ℃ for 2h, and then carrying out ball milling to obtain semi-hydrated phosphogypsum;
2) weighing 100kg of the obtained semi-hydrated phosphogypsum, adding 0.2kg of konjac flour, and uniformly stirring;
3) then adding 0.5kg of binder, 0.5kg of waterproof agent, 0.08kg of foaming agent and 70kg of water, and uniformly stirring to prepare slurry;
4) the slurry is combined with upper and lower protective paper sheets to form, cut, and finally dried at 215 ℃ for 35min, and then dried at 125 ℃ to constant weight to prepare the paper-surface gypsum board.
The longitudinal breaking load 434N and the transverse breaking load 199N of the obtained thistle board are obtained; the protective paper and the board core are not peeled off, and the bonding performance reaches grade I; the product quality meets the performance requirements of national standard GB/T9775-.
Example 3
In the embodiment, the content of soluble phosphorus in the phosphogypsum raw material is 5000 mg/kg; f-The content of Mg is 900Mg/kg2+The content is 500mg/kg, K+The content of Na is 1600mg/kg+The content is 900 mg/kg.
The granularity of the raw material konjak powder is 40 meshes; the viscosity of the konjac flour is 13000mPa & s; the pH of the 1 wt.% aqueous solution was 7; the glucomannan content was 70 wt.%.
The raw material binder is modified sorghum starch and modified cassava starch in a mass ratio of 1: 1;
the raw material waterproof agent is an organic silicon waterproof agent;
the raw material foaming agent is selected from the group consisting of anionic surfactant sodium alcohol ether sulfate and foam stabilizer polyvinyl alcohol, and the mass ratio of the anionic surfactant to the foam stabilizer is 1: 1; the anionic surfactant is purchased from Jinan navigation chemical technology, Inc., and the foam stabilizer is purchased from Shangshen chemical technology, Inc., Anqiu, 1788 type;
in this example, the specific steps for preparing the phosphogypsum gypsum plasterboard are as follows:
1) calcining the phosphogypsum raw material at 140 ℃ for 3h, and then carrying out ball milling to obtain semi-hydrated phosphogypsum clinker;
2) weighing 100kg of the obtained semi-hydrated phosphogypsum, adding 1kg of konjac flour, and uniformly stirring;
3) then adding 0.3kg of binder, 1.0kg of waterproof agent, 0.15kg of foaming agent and 80kg of water, and uniformly stirring to prepare slurry;
4) the slurry is combined with upper and lower protective paper sheets to be formed, cut off, and finally dried at 220 ℃ for 30min, and then dried at 120 ℃ to constant weight to prepare the paper-surface gypsum board.
The longitudinal breaking load 407N and the transverse breaking load 171N of the obtained paper-surface gypsum board are obtained; the protective paper and the board core are not peeled off, and the bonding performance reaches II level; the product quality meets the performance requirements of national standard GB/T9775-.
Comparative example 1
The difference between comparative example 1 and example 1 is that the raw material phosphogypsum clinker in comparative example 1 is not mixed with konjac flour, konjac flour is not involved in comparative example 1, and the rest of the raw materials and the preparation method are the same as those in example 1.
The longitudinal breaking load 376N and the transverse breaking load 146N of the obtained gypsum plasterboard are obtained; the protective paper and the board core are peeled, and the bonding performance can only reach V level; the product quality does not meet the performance requirements of national standard GB/T9775-.
Comparative example 2
The difference between the comparative example 2 and the example 1 is that the raw material in the comparative example 2 adopts bentonite instead of the konjac flour, the bentonite and the konjac flour are used in the same amount, the konjac flour is not involved in the comparative example 2, and the rest of the raw materials and the preparation method are the same as the example 1.
Obtaining longitudinal breaking load 389N and transverse breaking load 152N of the gypsum plasterboard; the protective paper and the board core are peeled, and the bonding performance can only reach V level; the product quality does not meet the performance requirements of national standard GB/T9775-.
Comparative example 3
Comparative example 3 is different from example 1 in that lime is additionally added by 1kg to the raw material in comparative example 3, and the remaining raw materials and preparation method are the same as example 1.
The longitudinal breaking load 405N and the transverse breaking load 162N of the obtained paper-surface gypsum board are obtained; the protective paper and the board core are partially peeled, and the bonding performance can only reach grade III; the product quality does not meet the performance requirements of national standard GB/T9775-.
The transverse breaking load of the gypsum plasterboard prepared in the examples 1 to 3 is 407N-434N, the longitudinal breaking load is 171-199N, the protective paper and the board core are not peeled, and the bonding performance can reach I-II level; the product quality meets the performance requirements of national standard GB/T9775-.
The transverse breaking load and the longitudinal breaking load of the paper-surface gypsum boards prepared by the comparative examples 1 to 3 are smaller than those of the examples 1 to 3; the protective paper is peeled from the board core, and the bonding performance can only reach III-V level; the product quality does not meet the performance requirements of national standard GB/T9775-.
Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.

Claims (12)

1. The phosphogypsum-paper-surface gypsum board comprises a board core and a protective paper, wherein the board core comprises the following raw materials in parts by mass: 100 parts of phosphogypsum clinker and 0.05-1 part of konjak powder;
the phosphogypsum clinker is prepared by calcining a phosphogypsum raw material;
the pH value of the phosphogypsum raw material is 3-7;
the impurity ions contained in the phosphogypsum raw material are soluble phosphorus and F-、Mg2+、K+Or Na+One or more of;
the content of the soluble phosphorus in the phosphogypsum raw material is 5000-10000mg/kg, F-The content of the phosphorus gypsum in the phosphogypsum raw material is 400-900Mg/kg and Mg2+The content in the phosphogypsum raw material is 500-1000mg/kg, K+The content of Na and 1200-1600mg/kg in the phosphogypsum raw material+The content in the phosphogypsum raw material is 600-900 mg/kg.
2. The phosphogypsum-paper-surface gypsum board of claim 1, wherein the core comprises the following raw materials in parts by mass: 100 parts of phosphogypsum clinker, 0.05-1 part of konjak powder, 0.3-1 part of binder, 0.1-1 part of waterproof agent, 0.04-0.15 part of foaming agent and 60-80 parts of water.
3. The phosphogypsum-gypsum plasterboard of claim 1 or 2, wherein the particle size of the konjac flour is 40-200 mesh.
4. The phosphogypsum-gypsum plasterboard of claim 3, wherein the glucomannan content of the konjac flour is not less than 70 wt.%; the viscosity of the konjac powder is 13000 and 28000mPa & s; the pH value of 1 wt.% aqueous solution of the konjac flour is 5-7.
5. The phosphogypsum gypsum plasterboard of claim 2, wherein the binder is a modified starch.
6. The phosphogypsum-gypsum plasterboard of claim 5, wherein the binder is one or more of modified corn starch, modified sorghum starch, modified tapioca starch and modified potato starch.
7. The phosphogypsum-gypsum plasterboard of claim 2 or 5, wherein the water-proofing agent is selected from one or more of emulsified paraffin and silicone water-proofing agent.
8. The phosphogypsum-gypsum plasterboard of claim 2 or 5, wherein the foaming agent consists of an anionic surfactant and a foam stabilizer, the mass ratio of the anionic surfactant to the foam stabilizer being 1 (0.8-1);
the anionic surfactant is selected from one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and sodium fatty alcohol-polyoxyethylene ether sulfate;
the foam stabilizer is selected from one or two of silicone polyether emulsion and polyvinyl alcohol.
9. A method of making the phosphogypsum gypsum plasterboard of any one of claims 2 to 8, comprising the steps of:
1) uniformly stirring the phosphogypsum clinker and the konjac flour to prepare the modified phosphogypsum clinker;
2) adding a binder, a waterproof agent, a foaming agent and water into the modified phosphogypsum clinker, and uniformly mixing to prepare gypsum slurry;
3) pouring the gypsum slurry on the surface protecting paper, and lapping, bonding and molding to prepare a wet plate;
4) and (4) after the wet board is solidified, the wet board enters a drier, and the dried wet board is the thistle board.
10. The method of making phosphogypsum gypsum plasterboard according to claim 9, wherein,
the drying in the step 4) is more than two drying stages with descending drying temperature.
11. The method for preparing phosphogypsum gypsum plasterboard according to claim 9, wherein the drying in step 4) is drying at 210-220 ℃ for 30min-40min, and then drying at 120-130 ℃ to constant weight.
12. A method for removing impurity ions in phosphogypsum comprises the step of uniformly mixing the phosphogypsum and konjac flour.
CN201910655207.5A 2019-07-19 2019-07-19 Phosphogypsum gypsum plaster board and preparation method thereof Active CN111592313B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910655207.5A CN111592313B (en) 2019-07-19 2019-07-19 Phosphogypsum gypsum plaster board and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910655207.5A CN111592313B (en) 2019-07-19 2019-07-19 Phosphogypsum gypsum plaster board and preparation method thereof

Publications (2)

Publication Number Publication Date
CN111592313A CN111592313A (en) 2020-08-28
CN111592313B true CN111592313B (en) 2022-01-07

Family

ID=72188873

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910655207.5A Active CN111592313B (en) 2019-07-19 2019-07-19 Phosphogypsum gypsum plaster board and preparation method thereof

Country Status (1)

Country Link
CN (1) CN111592313B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112374847A (en) * 2020-10-19 2021-02-19 四川蓝鼎新材料有限公司 Method for producing paper gypsum by using desulfurized gypsum

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103482896B (en) * 2013-09-09 2015-07-15 四川大学 Phosphogypsum ball and preparation method and application thereof
KR101512004B1 (en) * 2014-12-02 2015-04-14 유인주 Split block using unsintered inorganic binder and method for manufacturing thereof
CN109133688A (en) * 2017-06-28 2019-01-04 北新集团建材股份有限公司 Preprocess method and a kind of Thistle board of a kind of ardealite and preparation method thereof
CN109694098A (en) * 2017-10-23 2019-04-30 北新集团建材股份有限公司 Ardealite preprocess method and ardealite Thistle board and preparation method thereof
CN110015906B (en) * 2018-01-08 2021-03-23 北新集团建材股份有限公司 Low-density paper-surface gypsum board and preparation process thereof

Also Published As

Publication number Publication date
CN111592313A (en) 2020-08-28

Similar Documents

Publication Publication Date Title
US10696552B2 (en) Method for producing wet-process phosphoric acid and by-producing alpha-hemihydrate gypsum and high-purity and high-whiteness alpha-hemihydrate gypsum
CN109476484B (en) Method for preparing calcium sulfate
CN104628276A (en) Phosphogypsum treatment method
CN111825408A (en) Sludge curing agent prepared from steel slag modified phosphogypsum and use method thereof
CN110194605A (en) A method of building gypsum is prepared using ardealite
CN111592313B (en) Phosphogypsum gypsum plaster board and preparation method thereof
CN106915941B (en) Half water ardealite mine filling material and preparation method thereof
CN106006696B (en) A kind of application of Gypsum Fibrosum micropowder preparation method and the Gypsum Fibrosum micropowder
CN114133201A (en) Multi-scale solid waste modified phosphorus building gypsum composite cementing material
CN105036579A (en) Beta-phosphorus building plaster preparing method
CN105503007B (en) A kind of cement retarder based on ardealite
CN109133688A (en) Preprocess method and a kind of Thistle board of a kind of ardealite and preparation method thereof
CN104072003B (en) A kind of titanium gypsum prepares the method for cement retarder
CN101543829A (en) Comprehensive utilization method for recycling manganous carbonate slag
CN101774773B (en) Method for producing alpha-gypsum by using desulphurization gypsum or citric acid gypsum
CN110550927A (en) Industrial waste gypsum mortar prepared by industrial tail gas synergy and toxicity solving method
CN110015862A (en) Waterproof and anticorrosion ardealite compound additive and waterproof and anticorrosion ardealite construction material
CN115057639A (en) Method for preparing alpha semi-hydrated gypsum from fluorgypsum
CN110981275B (en) Phosphogypsum cement retarder and preparation method thereof
US2410390A (en) Quick-setting anhydrite and its manufacture
RU2333171C1 (en) Method for obtaining waterproof and environmentally safe gypsum binding materials
CN114213030A (en) Glass frosting liquid and frosted glass
CN110451829B (en) Phosphogypsum modifier and preparation method thereof
DE3239768A1 (en) METHOD FOR IMPROVING THE FLOWABILITY AND POWERTABILITY OF HUMID CALCIUM SULFATE DEPOSITS
CN112897976A (en) Light plastering citric acid gypsum mortar

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant