Filtration of Pulp of Complex Processing of Iron-Nickel Concentrate – a Waste Product of Magnesium Oxide Production

2019 ◽  
Vol 23 (10) ◽  
pp. 24-28 ◽  
Author(s):  
N.L. Mokhireva ◽  
V.R. Mirolyubov
Keyword(s):  
Membrane Filter ◽  
Waste Product ◽  
Filter Press ◽  
Processing Plant ◽  
Nickel Concentrate ◽  
Iron Salts ◽  
Washing Process ◽  
Iron Nickel ◽  
Granulometric Characteristics ◽  
Hydrolysis Of

The granulometric characteristics of the precipitate were investigated, and the chemical composition of the solution for complex processing of iron-nickel concentrate was established. The filtering process was carried out using a model of a chamber and chamber-membrane filter press. Separation of the suspension was implemented using chambers with a depth of 10 and 20 mm. It was established that washing is possible only with the use of a weak HCl solution due to the need to inhibit the development of hydrolysis of iron salts in the pores of the sediment. A scheme for optimizing the water balance of the washing process is proposed. Initial data are formulated for designing a filtration section of a complex processing plant for iron-nickel concentrate. Criteria for process automation are defined.

Identification of acid-insoluble filter-plugging compounds and optimal acid-washing procedures for tubular backpulse pressure filters

TAPPI Journal ◽  
2011 ◽  
Vol 10 (1) ◽  
pp. 17-23
Author(s):  
KEVIN TAYLOR ◽  
RICH ADDERLY ◽  
GAVIN BAXTER
Keyword(s):  
Calcium Sulfate ◽  
Membrane Filter ◽  
Sulfamic Acid ◽  
Xrd Analysis ◽  
Metal Sulfides ◽  
X Ray Diffraction ◽  
X Ray ◽  
Gypsum Formation ◽  
Acid Washing ◽  
Hydrolysis Of

Over time, performance of tubular backpulse pressure filters in kraft mills deteriorates, even with regular acid washing. Unscheduled filter replacement due to filter plugging results in significant costs and may result in mill downtime. We identified acid-insoluble filter-plugging materials by scanning electron microscope/energy-dispersion X-ray spectroscopy (SEM/EDS) and X-ray diffraction (XRD) analysis in both polypropylene and Gore-Tex™ membrane filter socks. The major filter-plugging components were calcium sulfate (gypsum), calcium phosphate (hydroxylapatite), aluminosilicate clays, metal sulfides, and carbon. We carried out detailed sample analysis of both the standard acid-washing procedure and a modified procedure. Filter plugging by gypsum and metal sulfides appeared to occur because of the acid-washing procedure. Gypsum formation on the filter resulted from significant hydrolysis of sulfamic acid solution at temperatures greater than 130°F. Modification of the acid-washing procedure greatly reduced the amount of gypsum and addition of a surfactant to the acid reduced wash time and mobilized some of the carbon from the filter. With surfactant, acid washing was 95% complete after 40 min.

Utilizing Food Waste Product (Date Tree Seeds) to Enhance the Filtration Characteristics in Water-Based Drilling Fluid System: A Comparative Study

2020 ◽  
Vol 142 (12) ◽  
Author(s):  
Abo Taleb T. Al-Hameedi ◽  
Husam H. Alkinani ◽  
Mohammed M. Alkhamis ◽  
Shari Dunn-Norman
Keyword(s):  
Oil And Gas ◽  
Drilling Fluid ◽  
Waste Product ◽  
Oil And Gas Industry ◽  
American Petroleum Institute ◽  
Filter Press ◽  
Fluid Loss ◽  
Low Viscosity ◽  
Tree Seeds ◽  
Materials Used

Abstract Practically, to regulate filtration characteristics of drilling fluid, non-biodegradable materials used commonly have a high cost with side effects on personnel safety and the environment. Hence, eco-friendly additives are needed as an alternative to replace or at least support the commonly used filtration control agents. This experimental investigation examines the possibility of using date tree seeds’ powder (DTSP), as a new eco-friendly fluid loss agent. Under surface and sub-surface conditions (fresh and aged conditions), experiments were executed utilizing low-temperature and low-pressure (LTLP) and high-temperature and high-pressure (HTHP) American Petroleum Institute (API) filter press to comprehend the influence of DTSP on the seepage loss characteristics. The findings were compared with a commonly utilized chemical additive to regulate filtration characteristics of drilling fluid (low viscosity sodium carboxymethyl cellulose (CMC-LV)). Two concentrations of DTSP and CMC-LV were added separately to a reference fluid (RF) to understand the effect of concentration variations on filtration properties. The findings revealed that both DTSP and CMC-LV significantly improved the filtrate and the filter cake when comparing them with the RF under fresh and aged conditions. The findings for fresh conditions also showed that LTLP filtration measurements for CMC-LV additives had almost similar performance as DTSP additives, while HTHP filtration measurements exhibited that the two concentrations of DTSP additives were marginally better than those of CMC-LV additives. For aged conditions, CMC-LV additives were relatively more efficient than DTSP additives for LTLP filtration control experiments. However, DTSP additives were more efficient in improving the filtration characteristics as compared to CMC-LV additives for HTHP filtration control experiments. These results are in aid of shifting the oil and gas industry from using conventional harmful additives to using unconventional eco-friendly additives. This also helps in transforming unwanted food wastes into valuable commercial products, which can revolutionize the domestic and international industries and create new job opportunities, hence minimizing the total cost of drilling fluid and the wastes disposed to the environment.

Oxidative hydrolysis of CsI radioaerosols localized on TRUMEM metallic membrane filter

2008 ◽  
Vol 50 (4) ◽  
pp. 402-407
Author(s):  
E. N. Bogachev ◽  
I. A. Rumer ◽  
S. A. Kulyukhin
Keyword(s):  
Membrane Filter ◽  
Hydrolysis Of ◽  
Metallic Membrane

scholarly journals Treatment of natural surface waters using new composite flocculants-coagulants

2020 ◽  
Vol 4 (5) ◽  
pp. 211-217
Author(s):  
Kudryavtsev P
Keyword(s):  
Water Purification ◽  
Industrial Wastewater ◽  
Natural Waters ◽  
Drinking Water Treatment ◽  
Titration Method ◽  
Aluminum Salts ◽  
Iron Salts ◽  
Isoelectric Points ◽  
Ancient Times ◽  
Hydrolysis Of

Coagulation is an essential process in the treatment of water and industrial wastewater. In the field of drinking water treatment since ancient times, water purification using coagulants using various substances has been practiced. Coagulation is the most common method of purification of natural and wastewaters from the bulk of colloidal, finely dispersed, and partially dissolved contaminants. The characteristics of the new composite flocculants-coagulants ASFC and ISFC developed by the authors are presented in comparison with conventional aluminum and iron salts. The titration method was used to study the behavior of coagulant flocculants at different pH. The titration method was used to study the behavior of coagulant flocculants at different pH. The ζ-potentials and isoelectric points for aluminum hydroxide obtained by hydrolysis of a coagulant are determined. The nature of the interaction of active silicic acid and the products of hydrolysis of aluminum salts as components of composite flocculants-coagulants is shown. The characteristics of natural waters are given, on which the efficiency of using the obtained flocculants-coagulants is investigated. A comparison of the coagulating ability of coagulants in water purification with high color from the Orsha River and with medium color from the Volga and Tvertsa rivers is presented.

Evaluation of Air Samplers for Recovery of Biological Aerosols in Dairy Processing Plants

1989 ◽  
Vol 52 (9) ◽  
pp. 655-659 ◽  
Author(s):  
YOUNG-JAE KANG ◽  
JOSEPH F. FRANK
Keyword(s):  
Membrane Filter ◽  
Ice Cream ◽  
Processing Plant ◽  
Milk Processing ◽  
Air Sampler ◽  
Biological Aerosols ◽  
Dairy Processing ◽  
Processing Plants ◽  
Stage 1 ◽  
Number Of Particles

An All Glass Impinger-30 (AGI-30), Andersen 6-stage Sieve Air Sampler (Andersen impactor), Reuter centrifugal air sampler (RCS sampler), and the Millipore open type membrane filter sampler (Filter sampler) were evaluated for viable particle recovery in three dairy processing plant environments. There were two size distribution peaks for viable particles, at stage 1 (>7.0 μm) and stage 3 (3.3–4.7 μm). About 10–12% of the particles were smaller than 2.1 μm in size and were mostly non-molds. During milk processing, the highest number of particles were >7.0 μm in size. But, during ice cream processing and in the idle ice cream room, the highest number of particles were 3.3–4.7 μm in size and were mostly molds. Mean viable particle recovery decreased in the order of AGI-30, Andersen impactor, RCS sampler, and Filter sampler for each of the three sampling environments. These results contrast to those obtained using laboratory-generated aerosols where both the AGI-30 and RCS sampler exhibited low recovery. The increased aerosol recovery by AGI-30 in processing plant compared to laboratory-generated aerosols indicates the presence of carrier and passenger type aerosol particles which disintegrate upon impingement. A comparison of the percent of non-mold cfu recovered by the RCS sampler vs. Andersen impactor indicates that the RCS sampler has a bias toward the detection of non-mold containing particles at all three of the locations tested. The Andersen impactor proved to be the most reliable sampler for recovering biological aerosols from dairy processing plant air.

Development of the Membrane Filter Press for the Processing of Sewage Sludge

1992 ◽  
Vol 25 (4-5) ◽  
pp. 297-305 ◽  
Author(s):  
P. Lowe ◽  
D. Shaw
Keyword(s):  
Membrane Filter ◽  
Waste Water Treatment ◽  
Scale Up ◽  
Filter Press ◽  
The Past ◽  
Performance Guarantees ◽  
Capital Productivity ◽  
Pressing Cycle ◽  
Solids Content ◽  
The Uk

The dewatering of sewage sludges using filter presses has been in common use for the past 80 years. The technology was mainly used in the UK for large waste water treatment plants especially where woollen grease was extracted from the sludge. It was also associated with the predrying of sludge prior to incineration in Multi Hearth Furnaces. To meet the growing demand for drier cakes and better capital productivity the membrane filter press has been developed. With the introduction of improved polyelectrolytes, polymer dosing systems, insitu cloth washing and computerised control the average pressing cycle has been reduced from 4-6 hours to under two hours. At the same time the dry solids content of the cake has become more consistent and for most waste waters in excess of 30%. The use of on-site pilot plant trails to determine the design criteria is now the accepted approach enabling sensible scale up and the setting of performance guarantees.

Dewatering of brewer’s spent grain using an integrated membrane filter press with vacuum drying capabilities

2015 ◽  
Vol 51 (4) ◽  
pp. 692-700 ◽  
Author(s):  
Remígio M. Machado ◽  
Ricardo A. D. Rodrigues ◽  
Carlos M. C. Henriques ◽  
M. Lurdes F. Gameiro ◽  
M. Rosinda C. Ismael ◽  
...  
Keyword(s):  
Membrane Filter ◽  
Filter Press ◽  
Vacuum Drying ◽  
Brewer’S Spent Grain ◽  
Spent Grain

scholarly journals Enabling safe dry cake disposal of bauxite residue by deliquoring and washing with a membrane filter press

2015 ◽  
Vol 33 (3) ◽  
pp. 258-266 ◽  
Author(s):  
Teemu Kinnarinen ◽  
Boguslaw Lubieniecki ◽  
Lloyd Holliday ◽  
Jaakko-Juhani Helsto ◽  
Antti Häkkinen
Keyword(s):  
Membrane Filter ◽  
Bauxite Residue ◽  
Filter Press

scholarly journals Normal Electrochemical Deposition NiFe

2020 ◽  
Vol 5 (8) ◽  
pp. 828-834
Author(s):  
Robert Dmitrievich Tikhonov
Keyword(s):  
Magnetic Properties ◽  
Electrochemical Deposition ◽  
Selection Process ◽  
Iron Ions ◽  
Variable Valence ◽  
Chloride Electrolyte ◽  
Iron Salts ◽  
Anomalous Character ◽  
Hydrolysis Of ◽  
Electrolyte Ph

Due to heating of the electrolyte is an excluded abnormal codeposition alloy components and reduced variation of process parameters to achieve optimal magnetic properties Ni81Fe19 films of magnetic field concentrators. Proposed chloride electrolyte pH adjusted with hydrochloric acid, which provides congruent electrochemical deposition of permalloy at heating and stirring. Magnetic properties of permalloy films are very sensitive to the variation of component relationships of 4.26. Control of accuracy of preparation of chloride electrolyte for electrochemical deposition of NiFe conducted using spectrophotometry. It is shown that the selection process of cooking the electrolyte for electrodeposition of Ni81Fe19 alloy and temperature allow to get normal, congruent electrochemical deposition of permalloy films. It has been established that the anomalous character of permalloy deposition associated with the main feature of iron ions-the existence of variable Valence iron with two or three values in the charge of ions during the hydrolysis of iron salts.

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