7.6: Classifying Separation Techniques

A membrane filter is the method of choice for particulates that are too small to be retained by filter paper. Figure 7.6.1 provides information about three types of membrane filters. For applications of gravity filtration and suction filtration in gravimetric methods of analysis, see Chapter 8. Figure 7.6.1 . Examples of three types of membrane ...

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Comprehensive recovery of rare earth elements and gypsum from

Gypsum (CaSO 4 ·2H 2 O) possesses a density of about 2.0 g/cm 3 and the density values of SrSO 4, BaSO 4, La 2 (SO 4) 3, Ce 2 (SO 4) 3 are 3.96, 4.50, 3.60, 3.91 g/cm 3, respectively. Based on these physical property differences, gravity separation methods such as screening, reselection, hydraulic cyclone are strongly recommended.

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Method for separating calcium carbonate and gypsum

the invention relates to a method for separating a slurry containing gypsum granules and calcium carbonate granules and an aqueous solution comprising at least one sodium salt, said method...

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Selective flotation separation of gypsum and quartz using dodecyl …

The selective flotation separation of gypsum and quartz in phosphogypsum (PG) is an urgent problem that is very important for the high-value utilization of PG. In the work, …

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Method and apparatus to minimize air-slurry separation during gypsum

A method and apparatus are provided for providing a uniformly mixed additive-enhanced gypsum slurry to a web. The calcined gypsum and water are introduced into the mixer 12 through at least one inlet 26, 28 of the mixer 12. The contents are stirred to form a slurry. The slurry passes from the outlet 34 of the mixer 12 into the conduit 38.

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Liquid solid separation method for processing gypsum serum

A gypsum slurry and solid separation technology, which is applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems …

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Separation processes for the treatment of industrial flue gases

It is evident that, there is a critical need for more effective methods of separation than ever. As pollution transmission line standards are being raised, separation is now an integral part of the overall field of mitigation necessary to control flue gases. ... Water resistant blended cements containing flue-gas desulfurization gypsum ...

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Usage of air jigging for multi-component separation of …

The use of air jigging for performing multi-component separation in the treatment of mixed construction and demolition waste was studied. Sorting tests were carried out with mixtures of equal bulk volume of concrete and brick in which fixed quantities of unwanted materials - gypsum, wood and paper - were added.

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A Novel Approach for Separation and Recovery of Titanium, …

produces red gypsum, an industrial by-product, which the main component is calcium sulfate dihydrate and hydroxides such as iron, titanium, and magnesium [], but also wastes 1 resources. In recent years, a common treatment method for red gypsum has been to use red gypsum as a substitute for natural gypsum to make building materials or cement-based

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GA‐620‐2019 GYPSUM AREA SEPARATION FIREWALLS

12. Begin the next course of the Gypsum Area Separation Firewall by attaching a 2" (51 mm) C‐runner (with legs up) to the previously installed top C‐runner of the lower course. This back‐to‐back C‐ runner installation allows for the progressive erection of the Gypsum Area Separation Firewall

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CN101456577B

The invention relates to a liquid-solid separation method for treating gypsum serum, which comprises: pumping the gypsum serum to be treated into a novel hydrocyclone through a …

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A Novel Process to Recover Gypsum from Phosphogypsum

where R is the recovery of gypsum (%), Q 1 is the weight of the flotation concentrate (g), G 1 is the calcium sulfate dehydrate of the flotation concentrate, Q 0 is the weight of phosphogypsum (g), and G 0 is the calcium sulfate dehydrate of phosphogypsum (g).. 2.3. Analyses. The whiteness of the gypsum concentrate samples was measured using a WSD-3C whiteness …

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EP2934760A1

EP2934760A1 EP13811473.1A EP13811473A EP2934760A1 EP 2934760 A1 EP2934760 A1 EP 2934760A1 EP 13811473 A EP13811473 A EP 13811473A EP 2934760 A1 EP2934760 A1 EP 2934760A1 Authority

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Liquid solid separation method for processing gypsum serum

A gypsum slurry and solid separation technology, which is applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of poor wear resistance, complicated production and high cost, and achieves reduction of solid phase content, reduction of floor space, The effect of protecting the environment

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A new calculation method of efficiency for gypsum and …

PDF | On Feb 17, 2021, Mehmet BİLEN published A new calculation method of efficiency for gypsum and wastewater hydrocyclones in FGD unite in a power plant | Find, read and cite all the research ...

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US8475762B2

A method and apparatus for providing an evenly mixed additive enhanced gypsum slurry to a web. Calcined gypsum and water are inserted into a mixer through at least one inlet of the mixer. The contents are agitated to form a slurry. The slurry is passed from an outlet of the mixer into a conduit. An additive is introduced into the slurry along a length of the conduit to achieve a flow …

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Gypsum Board Area Separation walls as fire walls

In my research I see that gypsum area separation walls were intended to be used as party walls for town home construction and I have several concerns using them in a large scale 4 story apartment complex. 1. These area separation / firewalls will bisect common corridors and be used as horizontal exits with rated door openings in them.

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Method and apparatus to minimize air-slurry separation during gypsum

A method and apparatus for providing an evenly mixed additive enhanced gypsum slurry to a web. Calcined gypsum and water are inserted into a mixer (12) through at least one inlet (26,28) of the mixer (12). The contents are agitated to form a slurry. The slurry is passed from an outlet (34) of the mixer (12) into a conduit (38). An additive is introduced into the slurry along a length …

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Method for separating calcium carbonate and gypsum

A method for separating a suspension containing gypsum granules and calcium carbonate granules and an aqueous solution, wherein the aqueous solution comprises at least one …

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JP2008178807A

PROBLEM TO BE SOLVED: To provide a separation and recovery method of a waste gypsum board capable of reducing the number of equipment machines and enhancing the separation of paper and gypsum to recycle the paper by performing crushing, drying and separation at the same time using a chain striking type crushing and drying machine in the recycling of the …

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Apparatus and method for recycling gypsum wallboard

An apparatus and method for recycling gypsum wallboard is described and claimed. Gypsum wallboard is formed from a gypsum core sandwiched between two sheets of heavy paper. The apparatus has a crushing means to crush the gypsum core of the wallboard and shred the paper covering. A grinding means further pulverizes the gypsum into a powder and tears the …

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A Novel Process to Recover Gypsum from Phosphogypsum

Presently, the main separation and purification methods for phosphogypsum are as follows. Phosphorus and fluorine in phosphogypsum are largely soluble in water. Owing to their …

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DensGlass multi-family, multi-story construction. Area …

Georgia-Pacific Gypsum Area Separation Wall assembly is listed in the UL Fire Resistance Directory under UL Design U 373, the ... Item 11 for two code-compliant methods for installing a gypsum board roof underlayment. 8. Once the 2" (51 mm) Area Separation Wall is erected, construction of the adjacent interior wall framing can begin. Breakaway

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Effective separation of metal impurities from gypsum nanosludge

The effective separation of metal impurities from gypsum sludges is crucial for both environmental protection and resource recovery. However, it is seriously limited by their entrapment within calcium sulfate crystal lattices. This study presents a universal strategy for metal extraction through combined con Environmental Remediation Celebrating the 10th …

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JPH03165814A

PURPOSE:To remarkably remove impurities from a solution after gypsum separation by bringing a solution after the separation of gypsum in a slurry at the outlet of an absorbing column into contact with an anion exchange membrane and a cation exchange membrane to remove Cl<->, F<->, Na<+>, etc., and then circulating the solution into the absorbing column.

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EP0386998A1

Separation apparatus and separation method for material related to absorbent article JP5934631B2 (en ... US20160214895A1 (en) * : : International Material Recovery Inc. Apparatus and method for recycling gypsum US20160235110A1 (en) * : : Frito-Lay North America, Inc. Method and apparatus for controlling ...

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Best Practice Guidance

%PDF-1.3 %âãÏÓ 1 0 obj >]/Pages 3 0 R/Type/Catalog/ViewerPreferences >>> endobj 2 0 obj >stream application/pdf British Gypsum Best Practice Guidance - BPG001-4.0 ...

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MY168644A

A method and apparatus for providing an evenly mixed additive enhanced gypsum slurry to a web. Calcined gypsum and water are inserted into a mixer (12) through at least one inlet (26, 28) of the mixer (12). The contents are agitated to form a slurry. The slurry is passed from an outlet (34) of the mixer (12) into a conduit (38). An additive is introduced into the slurry …

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A new method for simultaneous separation and solidification of …

Arsenic (As)-bearing gypsum sludge, one of the biggest As-bearing wastes, has seriously threatened ecological security due to the great mobility and leaching toxicity of As.Unfortunately, most of this sludge was discharged into tailing ponds without treatment. In this paper, a novel co-process of As-bearing gypsum sludge, waste carbon cathode (WCC) and Fe …

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A rapid sample digestion and U-Th separation method for …

the gypsum samples digested in K 2CO 3 solution are in agreement with our previous experiments, in which the gypsum samples were digested using mixed acids. Therefore, the proposed method can be used for rapid sample digestion and …

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