Nigeria is rich is solid mineral resources, such as: Kaolin, gypsum, mica, clay, tantalite, iron ore, gemstone, silica sand.
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Recycling concrete &building rubble is not only able to bring profit to investors, but also good for environment protection.
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By absorbing the advanced technology from the world, we researched and designed PF series impact crusher.…
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Base on the plentiful experience of producing and marketing of impact crusher, Sofol R&D institution…
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Adopting technology from the world, PY Series spring cone crusher has an excellent performance in secondary…
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The vibrating screen is a kind of sieving equipment of international advanced level, developed by our…
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Sofol VSI Series vertical shaft impact crusher is designed by reputed German expert of Sofol and every…
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Titanium gypsum (TG) is a industrial gypsum produced during the manufacture of titanium dioxide (TiO 2) by the sulphuric acid process, after neutralisation of the acid waste …
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After the four hemihydrate powders were prepared according to the preparation process (Fig. 2), in order to systematically study the degradation mechanisms of recycled building gypsum mechanical properties, three rational comparative methods were proposed through constraining the conditions: (1) The amount of water requirement was directly ...
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The invention discloses a preparation method of a dry gypsum cementitious base material for anti-static floors. The raw materials are as follows: building gypsum powder, water, a retarder, a crystal modifier, an anti-blocking agent, a reinforcing agent, a dispersing agent, a plasticizer and an anti-cream agent; and supporting special machinery for production is provided.
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The invention discloses a preparation method and an application of a gypsum retarder. The gypsum retarder is prepared from a diacid or anhydride material and an ammoniacal material or L-aspartic acid; the retarder prepared by use of the preparation method is added to gypsum so as to increase the setting time of a gypsum building material and reduce the strength loss of …
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The industrial byproduct gypsum is a general term for byproducts discharged from industrial production with calcium sulfate as the main ingredient. Due to the high number of impurities and production volume, the industrial byproduct gypsum is underutilized, leading to serious environmental problems. At present, only desulfurization gypsum and …
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According to the literature study, with reference to the carbon emission of 170 kg/t (kgCO 2 /t) for the production of building gypsum (semi-water) from industrial by-product …
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The invention belongs to the technical field of building materials, and provides building gypsum concrete and a preparation method thereof. The building gypsum is obtained by dehydrating industrial byproduct gypsum, the mixing amount of the gypsum is 65-90%, industrial waste residues are greatly consumed, and an effective way is provided for solid waste …
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The invention relates to a production method of alpha-gypsum powder with high strength. The production method comprises the following steps: (1) mixing phosphogypsum with a dry basis mass content larger than or equal to 95% with water to prepare slurry; (2) adding a crystal modifier in the slurry, and transforming the crystal under the conditions of the temperature of …
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The paper presents a study of the current state of autoclaved aerated concrete production. Global trends of autoclaved aerated concrete market confirm the tendency to reduce the density of wall ...
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The present invention provides a process method for producing a gypsum building product, namely an extruding method which is energy-saving and time-saving and which can rapidly produce a gypsum building product with excellent quality. The process method mainly consists of three major parts: the preparation of a gypsum extrusion material, an extruder group and a …
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The preparation of natural and synthetic gypsum prior to calcination, such as drying and grinding. ... Handling and Processing FGD Gypsum for Application in the Building Industry in …
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The preparation of fiber-reinforced phosphorus building gypsum composite materials (FRPGCs) is an important approach to enlarge the utilization of phosphogypsum resources.
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Additionally, the simple preparation, low energy consumption, and low pollution of the recycling process may alleviate the pressure on resources and the environment caused by Portland cement [25]. Gypsum can be divided into natural gypsum, flue gas desulfurisation gypsum and PG, and there are relatively mature applications for the former two.
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sumption at production is several times higher. The main methods of the preparation of gypsum-based lightweight materials are described and com - pared. Gypsum can be lightened indirectly by the lightweight filler or directly. In the directly lightened materials, the pores are introduced into the gypsum material either by some chemical reaction ...
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Preparation and Performance Study of Light Weight Gypsum Mortar Xiangquan Yang, Mengdan Zhang, ... and high strength, further expand the use of FGD building gypsum and improve the utilization rate of FGD building gypsum. In this paper, based on the cementitious material (GM-PO-S95 system) prepared from desulfurized building gypsum (FGD ...
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The preparation of the alpha form of calcium sulphate hemihydrate is technically relatively complicated. The idea is to allow 1.5 molecules of water contained in gypsum to leave through ...
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The research produced a new eco-friendly, high-strength, water-resistant building material by using the simplest mechanical method of pressing phosphogypsum. The compressive strength of the blocks was higher than 80 MPa and the flexural strength was 5.5 MPa when the pressure was 300 MPa and the placing time was 5d.
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Crystal modifier is an important factor in preparation of α-hemihydrate gypsum (α-CaSO 4 ·0.5H 2 O) from phosphogypsum (PG). Here, α-CaSO 4 ·0.5H 2 O was prepared from PG using a semi-dry method. SEM, XRD, XPS were used to explore the effects of one or more crystal modifiers on crystal growth and mechanical properties after hydration and hardening of …
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Gypsum building products mainly contains at present: Thistle board, gypsum block, gypsum lath etc.Although the production equipment of these goods is different, but all being to adopt traditional slurry flowing process or casting to produce, promptly all is the needs for moulding, adds excessive water in gypsum powder, ratio of water to material is at 0.5-0.7, and the …
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A novel method for preparing phosphorus building gypsum (PBG)‑based building materials with low water/gypsum ratios Wan Huang 1,2 · Yunzhi Tan 1,2 · Huajun Ming 1,2 · Hui Li 1,2 · …
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Enhanced organic silicon microcapsule gypsum waterproof emulsion and preparation method and application thereof WO2024073303A1 (en) : : United States Gypsum Company: A method for measuring width and edge profile of a …
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The safest method for soaking the cast is to place it in a water bath with gypsum debris remaining on the bottom of the container to provide a saturated solution of calcium sulfate. If the storage temperature is raised to between 90 °C and 110 °C (194 °F to 230 °F), shrinkage occurs, along with loss of strength as the water of ...
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The preparation of gypsum-based self-leveling mortar (GSLM) from solid waste-derived sulfoaluminate cement-modified hemihydrate gypsum is an effective path to enhance its mechanical properties. ... LSCM has been extensively used in various building materials production, such as ed concrete [19], ... Methods for chemical analysis of gypsum ...
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Phosphogypsum (PG) is a byproduct generated during the wet processing of phosphoric acid production from phosphate rock (Baolin et al., 2022).It is estimated that 4.5–5.5 tons of PG are produced for per ton of phosphorus pentoxide produced (El-Didamony et al., 2012).PG has a complex, with more than 80 %−90 % consisting of CaSO 4 ·2H 2 O. However, due to the …
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The invention discloses a continuous production method of superfine gypsum powder. The method comprises the steps that gypsum powder, water and a pretreatment agent are fed into the head of a ceramic ball mill at the same time, and gypsum slurry flowing out of the tail of the ball mill flows into a slurry storage pot; sulfuric acid (for adjusting the slurry pH value) and a …
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DOI: 10.1016/j.conbuildmat.2024.134888 Corpus ID: 266829335; Preparation of α-hemihydrate gypsum whiskers from phosphogypsum using atmospheric pressure nitrate solution @article{Xia2024PreparationO, title={Preparation of $alpha$-hemihydrate gypsum whiskers from phosphogypsum using atmospheric pressure nitrate solution}, author={Baolin Xia and …
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The invention discloses a preparation process of a building gypsum block, which comprises the following steps: step A: placing the gypsum powder into a frying pan, heating for dehydration to ensure that the material is taken out of the pan immediately when the temperature of the material is raised to 190-; and B: mixing the water and the plaster powder according to the weight ratio …
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The addition of ordinary Portland cement to beta-hemihydrate gypsum is a common modification method [16], [19]. However, the preparation of ordinary Portland cement typically consumes high energy and leads to high CO 2 emission [20], and ordinary Portland cement-modified GSLM has the drawbacks of low early strength and slow strength …
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The invention belongs to the technical field of chemical production, and particularly relates to a preparation method of alpha-beta composite semi-hydrated gypsum. The phosphogypsum is divided into two parts after being dried for the first time, the first part is calcined to prepare the anhydrous gypsum, the second part is added with hot water and placed in a crystal transfer …
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The invention discloses a production process method of gypsum powder with various strength properties. The invention mainly comprises the following steps: heating the dihydrate gypsum raw material to 110-500 ℃ by microwave irradiation, and stir-frying for 5-240 minutes to obtain a product A; mixing the product A with an additive, feeding the mixture into a closed reactor, …
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This research offers a useful method for the preparation of eco-friendly and functional integrated lightweight gypsum. ... gypsum cementitious materials show significant …
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This method statement describes the steps for gypsum plaster and putty application. The steps include surface preparation such as ensuring a clean and dry surface, applying a bonding agent and allowing it to dry, mixing the gypsum or putty to the correct ratio, applying coats up to the specified thickness using tools like trowels, and finishing the surface. Quality checks are …
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Phosphogypsum (PG) is a solid waste produced during chemical wet phosphoric acid production [1].The main ingredient in PG is calcium sulphate dihydrate, which is a good reclaimed gypsum resource [2].According to statistics, for each ton of phosphoric acid produced, four–five tons of PG are generated (wet basis) [3].Currently, the global annual output of PG is …
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