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Contents

 

 

 

 

 

 

Pulping and Bleaching Paper Testing Microscopy Dissolvomg Pulp Reburned Lime Analyzer

 

Chemistry Services


Our unique Chemistry Services team combines a knowledge of process chemistry and analytical skills to provide detailed chemical characterisation of pulp and paper mill processes and products. Our team has the expertise to analyse samples from the furnish, pulping, bleaching, recovery, recausitcizing, paper machine, effluent and other areas of mills. We utilise a Quality Management System that meets, as a minimum requirement, ISO/IEC 17025 standards and are accredited by the Canadian Association for Laboratory Accreditation, Inc. (CALA) for specific tests.

We employ wet chemistry, liquid and gas chromatography, ICP, FTIR and other analytical techniques across the breadth of Pulp and Paper mill processes and products.

Typical test usage and targets are indicated, although many procedures are broadly applicable as required. Talk to us about your needs.

Preparation Services
Drying, Crushing, Grinding etc

Routine Anion Targets
Carbonate CO3, Bicarbonate HCO3, Oxalate C2O4, Bromide Br, Fluoride F, Iodide I
Sulfur Species:
Sulfate SO4, Sulfite SO3, Sulfide S, Thiosulfate S2O3
Chlorine Species:
Chloride Cl, Chlorite ClO2, Chlorate ClO3
Nitrogen Species:
Nitrate NO3, Nitrite NO2


* Metals / Cations Analysis by ICP
Routine Scan (24) – Al, As, Ba, B, Cd, Ca, Cr, Co, Cu, Fe, Pb, Li, Mg, Mn, Mo, Ni, P, K, Si, Na, Sr, Ti, V, Zn
Inerts Scan – Al, Ca, Fe, Mg, Si
Individual Elements
Special Individual Elements – Hg, Se, Th


** Element Analysis / Microanalysis by Pyrolysis
Carbon C, Hydrogen H, Nitrogen N, Oxygen O (CHNO)

*** Extractive Chemical Species
Terpenes: a-pinene, Camphene, ß-pinene, Myrcene, .3-carene, a-phellandrene, a-terpinene, .-menthene, .-cymene, a-limonene, ß-ocimene, .-terpinene, a-terpineol

Resin Acids: pimaric acid, sandaracopimaric acid, isopimaric acid, levopimaric acid, dehydroabietic acid, abietic acid, neoabietic acid, chlorodehydroabietic acid, dicholordehydroabietic acid

Fatty Acids: C12 lauric acid, C14 myristic acid, C16 palmitic acid, C18:0 stearic acid, C18:1/C18:3 oleic/linolenic acid, C18:2 linoleic acid, C20 arachidic acid, C22 behenic acid, C24 lignoceric acid

Resin and Fatty Acids may be determined as Total or Free / Salt Bound

Non-fibrous – Chemical Analysis of Pulping Liquors and Related Process Streams

Black Liquor (weak or strong)
  Alkali, Total [conductimetric]
  Alkali / ABC Titrations including: Active (AA), Effective (EA), Total Titratable (TTA)
  Anthraquinone
  Ash (@ 600°C)
  Boiling Point
  Boiling Point Rise
  Calorific Value (Gross) / Higher Heating Value(HHV) of BL Solids (BTU/lb)
  Carbohydrates (wood sugars: arabinan, galactan, glucan, mannan, xylan)
  Critical Solids (Burkite)
  Density (weak or strong BL)
  Elemental analysis (CHNO) **
  Fiber content
  Lignin content
  Metals / Cations *
  Tall Oil content
  Resin Acids + Fatty Acids *** (RFA - Rosin)
  Solids, Total (percent)
  Swelling characteristics of BL solids
  Viscosity – multipoint BL solids / temperature curves or at single points
  Sulfur – Total [photocombustion]
  Sulfur species (SO4, SO3, S, S2O3)


Black Liquor Analysis Discount Packages

  BL Thermal Data Special
  Calorific value (BTU/lb)
  Percent solids
  Organic/inorganic ratio (sulfated ash)

  Routine Black Liquor Monitoring
  Calorific value (BTU/lb)
  Percent solids
  Total sulfur (S)
  Total chloride (Cl)
  Total sodium, potassium (Na, K)
  Elemental analysis (CHNO)

  Extended Black Liquor Evaluation
  Calorific value (BTU/lb)
  Solids, total (percent)
  Total sulfur (S)
  Total chloride (Cl)
  Total sodium, potassium (Na, K)
  Elemental analysis (CHNO)
  Carbonate (Na2CO3)
  Sulfate (Na2SO4)
  Sulfite and thiosulfate (Na2SO3, Na2S2O3)
  Active (and estimated effective) alkali
  Total alkali
  Organic/inorganic ratio (sulfated ash)
  Viscosity of as received liquor measured at three temperatures in the range of 90°C to 115°C
  Metal Inerts (Ca, Mg, Fe, Si, Al)
  Tall oil content

  BL Viscosity and Swelling Properties
  Reduced pressure evaporation of black liquor to three solids levels followed by measurement of viscosity at three temperatures
  Calorific value (BTU/lb)
  Organic/inorganic ratio (sulfated ash)
  Swelling characteristics of dry liquor solids (duplicate)
  Elemental analysis (CHNO) **


Tall Oil
Tall Oil content (of Black Liquor)
Resin Acids + Fatty Acids *** (RFA - Rosin)
Unsaponifiable matter (Higher Alcohols etc)
Acid Number
Bottom solids and water (BSW)


Smelt, Green and White Liquors
Alkali / ABC Titrations, including Active (AA), Effective (EA), Total Titratable (TTA)
Causticity (ABC)
Reduction efficiency (ABC)
Sulfidity (ABC)
Elemental analysis (CHNO) **
Sodium Carbonate NaCO3
Sodium Sulfide Na2S
Sulfur Species (SO4, SO3, S, S2O3)
Carbonate CO3
Metals / Cations * (Total or Dissolved)
Polysulfides


Lime Mud / Green Liquor Dregs
CaCO3, Loss on ignition (@ 1000°C)
CaCO3, by gas chromatography
Hydrated Lime, Ca(OH)2
Available/Free lime, CaO
Free Carbon


Lime / Reburned Lime
Available/Free lime, CaO (Sugar Test)
Residual CaCO3, by gas chromatography
Residual Carbonate, by Reburned Lime Analyzer
Causticizing Power
Metals / Cations *


Saltcake / Precipitator Dust
Sodium
Sulfate Na2SO4
Thiosulfate Na2S2O3
Sulfite Na2SO3
Carbonate (ABC)
Chloride
Free Carbon
Insoluble matter
Sulfur species (SO4, SO3, S, S2O3)
Metals / Cations * pH


Scales / Deposits (Black liquor Evaporators and Other)
Sodium
Calcium
Carbonate
Sulfate
Oxalate
Sulfur species (SO4, SO3, S, S2O3)
Metals / Cations *
Ash
Analysis of source properties (eg Black Liquor)

For services to determine scale type (eg Burkeite Na6(CO3)(SO4)2, Pirrsonite xCaCO3 • yNa2CO3, Limestone CaCO3) refer to Contaminant and Unknown Identification.


Bleaching Solutions
Chlorine species (Cl, ClO2, ClO3)
Metals / Cations *


Condensates
Flash point
Hydrogen sulfide H2S
Methyl mercaptan CH3SH
Methyl disulfide (CH3)2S
Dimethyl disulfide (CH3)2S2
Methanol
Resin Acids + Fatty Acids ***
Terpenes ***
Total Reducible Sulfur


Fibrous – Chemical Analysis of Wood, Pulp, Paper and Related Materials

A
Acetone extractives
Acid insolubles
Acid insoluble ash (free carbon)
Acidity or alkalinity, pulp
Alkali resistant cellulose (by calculation)
Alpha, Beta, Gamma cellulose
Ash @ 525°C, @ 725°C, @ 1000°C
Ash fusion temperature
oxidation or reducing atmosphere


B
Biochemical Oxygen Demand, BOD

C
Carbon, fixed
Carboxyl functional group content
Carboxyl and aldehyde functional group content
Carbohydrates (wood sugars: arabinan, galactan, glucan, mannan, xylan)
Caustic solubility, 1% 100°C
Caustic solubility, 10% 25°C
Caustic solubility, 18% 25°C (hemicellulose)
Caustic solubility, 21.5%, 25°C
Caustic solubility, 20°C
Cellulose, alpha beta gamma
Chemical Oxygen Demand, COD, pulp and liquor
Chloride
Chloride, water soluble
Chloriting (delignification)
Chromium, hexavalent
Conductivity
Consistency, pulp suspensions
Copper number


D
Dichloromethane extractives (DCM)

E
Ether extractives
Extractives (DCM, ethanol, ether, methanol)


F
Formaldehyde (7 standard, specific and international methods)
Formaldehyde, free emulsion polymers


H
Hemicellulose (see Caustic Solubility)
Holocellulose


K
Kappa number
Klason lignin
Karl Fischer moisture


L
Lignin:
Klason / Insoluble lignin (wood, bleached and unbleached pulps)
Residual lignin (bleached and dissolving grade pulps)
Soluble lignin


M
Magnesium Silicate / Talc
Metals / Cations *
Methanol
Moisture (oven dry method)
Moisture, Karl Fisher (oils, tall oil soap, etc.)


O
Organo-Silicone

P
Pentosans (5-carbon sugar polysaccharides)
Permanganate number (K number)
pH (hot or cold)
Pitch, detrimental in pulp
Potential tall oil in wood
Potential turpentine in wood


R
Residual lignin (bleached and dissolving grade pulps)

S
Silica
Slime test (presence/absence)
Sodium (total, washable and bound sodium)
Solubility, 10% KOH
Surface pH
Starch
Sulfate, water soluble
Sulfur, Parr oxygen bomb
Sulfur, reducible (TRS)
Sulfur, total and bound
Surfactant, extractable non-ionic


T
Tall Oil, Potential (in wood)
Talc / Magnesium Silicate
Turpentine, Potential (in wood)


V
Viscosity, 0.5% CED
Viscosity, 0.5% CED moisture teller method
Viscosity, 1% ball fall
Viscosity, level off intrinsic (LOIV)
Viscosity, intrinsic


W
Water solubility
Water soluble chloride
Water soluble sulfate


 

Fuel – Wood Waste, Hog Fuel, Biomass & Sludge

Miscellaneous
Density
Moisture
Size Classification (Williams or Tyler sieve)
Ash Fusion Temp
Metals / Cations * in ash (elemental or oxides)
Organic Halides – refer below

Calorific Value (Gross) / Higher Heating Value (HHV) / (BTU/lb)


Fuel Packages
Ultimate analysis
  Ash (@ 575°C or 725°C)
  Elemental analysis (CHN with O by difference)
  Total sulfur, S
  Chloride, Cl

Fuel Proximate analysis
  Ash (@ 575°C or 725°C)
  Volatile matter
  Fixed carbon (by difference)

Combined Ultimate & Proximate package
  Combined tests as above


Contaminant and Unknown Identification

Material identification projects require some or all the following support services:
  Sample preliminary evaluation
  Analytical preliminary evaluation
  Analytical scheme design
  Data evaluation and interpretation
  Consultation


Fourier Transform Infrared Analysis
Where applicable, FTIR Spectroscopy and Microscopy in conjunction with other techniques may be applied.

Samples such as solids, powders, liquids, extractives, plastics and rubbers from industrial and other sources can be interrogated to determine composition using one or more of the FTIR techniques listed below. Pulp and paper products and process components, deposits, ash, contaminants, additives, coating materials etc. are analyzed frequently. The microscopy techniques available are well suited to micro amounts of material (eg from tape pull).

FTIR Spectroscopy techniques:
  KBr disc
  Pyrolysis
  NaCl salt plate

FTIR Microscopy techniques:
  Micro-transmission
  Micro-reflectance


Organic Halides Analysis
Reference methods available include PAPTAC, PTS, ISO, USEPA and SCAN

Pulp or Paper
Adsorbable Organic Halogen (AOX) – water leach
Extractable Organic Halogen (EOX) – solvent leach
Total Organic Halogen (TOX)
Total Halogen (TX)


Refined Cellulose + Suspensions
TOX

Other Solids and Non-aqueous liquids - Solvent, Oil, Grease, Sediment, Sludge
EOX
TX


Effluent Waters
AOX (total, dissolved or suspended)
Anion Species (Cl, ClO2, ClO3 Br, F, I, NO2, NO3)


Other Environmental Analysis
We perform or arrange a variety of wastewater testing relevant to the Pulp and Paper Industry

Aldehyde
Ammonia
Anion Species (Cl, ClO2, ClO3, Br, F, I, NO2, NO3, SO4, SO3, S, S2O3)
Biochemical Oxygen Demand (BOD)
Chemical Oxygen Demand (COD)
Dioxins and Furans
Formaldehyde
Methanol
Nitrogen, Kjeldahl (TKN)
Oil & Grease, Total
Pesticides
pH
Phenols
Phosphate, Total
Phosphate, Total Dissolved (Ortho)
Polybrominated Biphenyls (PBBs)
Polychlorinated Biphenyls (PCBs)
Solids (total, dissolved, fixed, suspended and nonfilterable)
Starch
Tannin and lignin-like compounds (TLLC)
Total Organic Carbon (TOC)

Core tests are presented according to the most common applications, and in addition to this we maintain an extensive testing library. Contact Client Services to discuss your requirements.


 

 

Chemistry Services Paper Testing Microscopy Dissolving Pulp Reburned Lime Analyzer

 

Pulping and Bleaching Studies


Our pilot plant and bleaching labs can process a wide range of materials, from non-woods (grasses, bamboo, agricultural residues) to wood species, arriving in whole form or pre-chipped. Our sample preparation, wood chip testing, pulping and bleaching equipment and capabilities are extensive. Therefore we would encourage any interested parties to contact the Pulping and Bleaching manager for a more thorough description of our capabilities and how we can help with your custom project.

Sample Preparation and Chip Testing:
  • Disc chipper – Chipping of logs
  • Thickness, roundhole, Tyler sieve classifiers – Chip, sawdust or nonwood size classification
  • Rot content, basic wood or bulk chip density
  • Centricleaner and pulp screens – cleanup of nonwoods or contaminated pulps, removal of shives

Pulping:
  • 20-liter circulating liquor digester – simulates continuous or batch kraft, soda-AQ, sulfite (acid and alkaline), kraft liner, low energy batch simulations (i.e. RDH®, SuperBatch®), alkali profiling cooks (i.e. MCC, EMCC, LoSolids cooks), and pre-hydrolysis studies using steam, water, or acid. Uses up to 4000g od sample per cook. Benefits include most reliable yield data, customizability (additives may be applied during cook, separate layers in digester), and larger pulp sample typically allows for brown and bleached strength studies.
  • 6-liter and 1-liter bomb digesters – simulate batch kraft, soda-AQ, high kappa kraft, and custom projects. 6-liter bomb uses up to 900g od sample, 1-liter K-bomb up to 120g od sample. Benefits include multiple cooks completed simultaneously in oil bath (up to three 6-liter bombs, and six 1-liter bombs), small sample size needed, excellent method for isolating unknown conditions, and the sealed nature of the bomb digesters allow for very high pressures.
  • 12-inch laboratory refiners – Atmospheric refiner with interchangeable plates and patterns, available for running basic mechanical pulping studies, determining wood brightness from chips, or breaking apart fiber bundles in high kappa cooks.
  • Note: All chemical pulping trials include total yield, screened yield, rejects, kappa or K# and
    residual EA.

Bleaching:
  • Standard bag bleaching – Any atmospheric bleaching stage, temperature controlled by water bath. C, D, E(p), P, X, Y, Q, A, Paa, etc. Typical sample size is 300g od pulp, however smaller samples may be used.
  • Pressurized stirred reactor – Used for O, Eo, or Eop stages. Sample size required: 300g od pulp. Custom-designed reactor preserves strength of pulp while simulating conditions.
  • Misc other – Ozone (medium or high consistency), Po (high temperature and pressure, oxygen-enhanced peroxide, completed in a Teflon-lined bomb)
  • Note: All bleaching stages report residual chemical and brightness or kappa.

Examples of Studies and Applications
Pulping
  • Optimization of low kappa pulping parameters necessary for production of ECF and TCF pulps.
  • Evaluation of new fiber sources, including non-wood or other sustainable fiber supplies.
  • Assessment of pulping additives prior to mill implementation.
  • Layered cooking of chips to determine economic benefits of chip thickness screening.
  • Evaluation of mill chip supplies for pulp yield and strength.
Bleaching
  • Evaluation of TCF bleaching sequences for wood or non-wood applications.
  • Development of low-AOX and dioxin-free bleaching sequences.
  • Increasing ECF production capacity through peroxide and xylanase applications.
  • Dissolving pulp bleaching, optimization, and preparation of client samples.
  • Quantification of increased bleaching costs caused by carryover.
  • Determination of the impact of bleach plant modification on chemical consumption, pulp strength and effluent properties.
  • Development of modified bleaching sequences to optimize bleach plants.

 

 

Chemistry Services Pulping and Bleaching Microscopy Dissolving Pulp Reburned Lime Analyzer

 

Pulp, Paper and Linerboard Testing


Our Pulp and Paper Testing Group can evaluate a wide range of physical, optical and printing properties, as well as perform tests related to various pulp treatments. We ensure rapid turnaround of test results to help our clients resolve problems quickly. Our test methods follow industry accepted procedures such as TAPPI, PAPTAC, ISO and SCAN. We maintain our high standard of accuracy and precision by conforming to a Quality Assurance Program that includes regular participation in collaborative pulp and paper reference monitoring programs.

Pulp Strength Evaluations
PFI mill
Valley Beater
Canadian Standard Freeness
*above evaluations will include CSF, burst, tear, tensile, bulk, tensile energy absorption and stretch


Mechanical Pulp Evaluations
Mechanical Pulp Handsheets including latency removal (Domtar mixer)
Mechanical Pulp Evaluations using Whitewater Recirculation including latency removal (Domtar mixer)
Post latency freeness (Domtar mixer)
*above evaluations will include CSF, burst, tear, tensile, bulk, tensile energy absorption and stretch


Bauer McNett Fiber Classification
4 fractions, +14, +28, +48, +100 mesh
5 fractions, +14, +28, +48, +100, +200 mesh
(other mesh screens also available)


Pulmac Shive Analyzer
As received
With latency removal
With display sheets
Duplicate runs
(0.004”, 0.006” screens available)


Handsheet Preparation
Semi-Automatic British Sheet Machine

Physical Strength Tests
• Basis weight
• Britt jar fines
• Castor oil absorption
• Dennison wax pick
• Drainage time
• Fold, MIT
• Grease resistance
• Internal bond
• Kit level, oil absorption
• Klemm absorption
• K and N ink absorbency
• Modulus of Elasticity
• Porosity, Gurley
• Porosity, Sheffield
• Repulpability
• Ring crush
• Roughness, Parker Print Surf
• Short span, dry or wet, Pulmac
• Shrinkage, handsheets
• Silver tarnishing
• Sizing, Hercules Size Test
• Smoothness, Sheffield
• Smoothness, Gurley
• Softness, Gurley
• STFI, Short Span Compression
• Stiffness, Gurley
• Stiffness, Taber
• Tensile, rewetted
• Water absorption, water drop method
• Water Absorption, Cobb
• Water resistance, paper
• Water retention value
• Water vapor transmission rate
• Wet web tensile @ 30% solids
• Zero span tensile, dry or wet, Pulmac

Fracture Toughness (In-Plane Tear)

Dirt and Shive Evaluation
Reflected light, Transmitted light

Fiber Characteristics
Fiber Quality Analyzer including fiber length, fiber width, coarseness, kink index, curl, percent fines and population

Optical Properties
• Brightness, ISO, Color Touch PC
• Brightness, reversion @ 105° C
• Color, CIE, Hunter
• Fluorescence
• Gloss 75°, 20°
• Light scattering coefficient
• Light absorption coefficient
• Opacity
• Tristimulus, x,y,z
• Whiteness, ASTM, CIE
• Dominant wavelength, Purity, Luminosity

Fluff Pulp Properties
• Conditioned basis weight
• Fluffing, Weber hammermill
• Fiber damage ratio
• Hardness index
• Neps or nodules
• Specific volume, resiliency, absorption capacity and time

Talc, Clay and Lime Analyses
• Bulk density, loose and compacted
• Oil absorption
• Water absorption
• Brightness, ISO
• Filler and additive evaluations

Specialty Tests and Services
• Density
• Absorbency and capacity, fabric
• Face plate replacement (British Standard Sheet Machine)

 

 

Chemistry Services Pulping and Bleaching Paper Testing Dissolving Pulp Reburned Lime Analyzer

 

Microscopy


Microscopy is an indispensable testing discipline for the pulp and paper industry. The primary application is fiber analysis, which provides detailed evaluations of wood species and pulp type in pulp, paper and wood samples. Non-wood and synthetic fibers can also be profiled microscopically. In addition, our microscopy department can provide valuable assistance in process troubleshooting. Defects and contaminants can be profiled and identified by microscopic techniques.

Species Analysis (pulp, paper and wood chips)
Includes percentage breakdown of species and pulp type. We can identify all common North American hardwoods and softwoods. Our team is also experienced with samples from Europe, South America and Asia. Analysis of sawdust and powdered products is also available.

Hardwood/Softwood Determinations
Track variations in hardwood/softwood content.

Chemical/Mechanical Pulp Content
Determine chemi/mechanical pulp content in blended products.

General Fiber Identification
Individual wood species and non-wood fibers (grasses, cereal straws, synthetics, etc.) Synthetics can be specifically identified by FTIR techniques.

Comparative Vessel Counts
Determines the relative amounts of hardwood vessel elements between pulps within a batch of samples. Vessels can also be categorized by size or observable damage. Photomicrographs can also contribute to this service.

Cell Wall Thickness and Fiber Diameter
An in-house method utilizing our digital camera and monitor tools to measure a minimum of 150 fibers for their average diameter and cell wall thickness.

Sclereid Counts
In conjunction with a Domtar shive analyzer, we determine sclereids/OD gram in pulps, positively identifying sclereids from other interferences.

Recycled Pulp Characterizations
Total sticky area and count. Reported as total count of stickies and as total surface area of stickies per 100 OD grams of sample. Total ink count and total ink area. Count and measure ink particles recording largest, smallest and average ink particle size.

Contaminant Identification
General microscopic examinations identify pulp and paper contaminants like shives, bark, sclereids and foreign material like plastic or synthetic fibers. Chemical characterization is further available by FTIR techniques. Photomicrographs are often a useful addition.

Photomicrographs
A digital camera mounted on our Nikon E400 microscope with 4x through 40x objectives provide detailed photographs of your sample. The images can be very useful in demonstrating what has been observed at the microscopic level. Photomicrographs are used in many applications including general fiber qualities, embedded contaminants, line defects, print quality and for marketing purposes.

 

 

 

 

Chemistry Services Pulping and Bleaching Paper Testing Microscopy Reburned Lime Analyzer

 

Dissolving Pulp


Econotech is experienced in the highly-specialized production and testing of dissolving pulp grades. Our experience dates back to the founding days of Econotech, when in 1972, we acquired the lab facilities and equipment of Columbia Cellulose, a manufacturer of dissolving pulp. Our unique skills and facilities enable us to simulate the production of viscose or acetate grades of pulp and provide detailed information on their properties.

Viscose Preparation and Evaluation
Laboratory scale preparation of alkali cellulose is followed by aging to a specified end point target viscosity. Xanthation of the alkali cellulose results in the formation of viscose. The viscose is dissolved in alkali with further aging resulting in a viscose solution simulating that used in the production of rayon. Both the slurry and sheet steeping procedures may be used.
  • Gel Content
  • Photomicrographs of viscose dope
  • Salt index

Characterization of viscose preparation and solution includes:
  • Aging time
  • Filterability
  • Haze
  • Clarity
  • Ball fall viscosity

In addition, should sheet steeping be assessed, the procedures used allow for the determination of capillary rise, sheet flotation, caustic absorption, swelling volume and density.

Cellulose Acetate Preparation and Evaluation
Laboratory scale preparation of cellulose triacetate is carried out by the catalyzed acetylation of conditioned cellulose. This is subsequently hydrolyzed to form secondary cellulose acetate. The secondary acetate is dissolved allowing for the determination of:
  • Clogging constant
  • Plugging value
  • Haze
  • Colour
  • Viscosity
  • Acetyl value

In addition, phase contrast microscopy can be used to photograph the product and to determine the population of un-acetylated or partially acetylated fibers and the presence of particulate impurities.

Fock Reactivity
A micro-scale preparation of viscose using a 0.5g sample of pulp. Test includes: Pulp sample preparation and conditioning, alkylation/xanthation, followed by cellulose regeneration as a measure of pulp reactivity. All samples are completed in duplicate.

 

 

 

 

Chemistry Services Pulping and Bleaching Paper Testing Microscopy Dissolving Pulp

 

Reburned Lime Analyzer [RLA]


At the mill, every penny counts. In a highly competitive global market where energy and chemical costs are at a premium, you scrutinize every aspect of your operations to reduce costs and gain a competitive edge. The lime kiln is one of those areas. Overburning deactivates lime and wastes energy, while underburning elevates deadload and reduces recaust efficiency, again resulting in waste. Stable production of high quality lime is key.

How well is your lime kiln performing?
To understand how well your lime kiln is working, you need to have a measure of product quality. Residual carbonate in reburned lime is a primary indicator that can help operators tune their kilns to avoid under- or overburning. Econotech’s RLA enables operators to regularly test and monitor residual carbonate through the day, supporting a stable and efficient kiln operation.

Using the reliable RLA data as a critical kiln control parameter, mills have realized significant benefits:
  • Reduced energy/fuel costs
  • Less overburning and underburning
  • Stronger, more stable recausticizing operation
  • Increased causticizing efficiency
  • Improved white liquor quality

Large Sample. Better Results.
Our RLA tests 2.00g of lime, making it easier to obtain a representative sample. Large samples also make the results less sensitive to weighing error and produce more CO2 for better measurement accuracy.

RLA G4: Enhanced Design
Econotech’s RLA was redesigned after extensive customer consultations. The result: a practical new design, improving on accuracy and robustness.

Improved Accuracy – Percent calcium carbonate is read directly from the RLA’s calibrated burette, which incorporates a validated offset to account for gas expansion due to heating. Consistently adding the same amount of acid is easier with an innovative design including a simplified auto-pipette and control valve system.

Corrosion Resistant – Almost all metal has been eliminated from the updated design. Glass and polymer components also provide excellent corrosion resistance. Its durability gives way to a longer service life and lower maintenance in harsh mill environments.

Easy to Use – Fewer critical testing steps mean easier operator training to achieve consistent results. The leveling bottle is attached to the stand and can be adjusted and locked into place/unlocked with one hand. Durable screw-in reaction jars make it much easier to secure and properly seal, reducing errors and jar breakages.

Safer – Acid bottles are now completely secure with no loose tubing to catch on. Acid is also contained during the reaction, eliminating any concern of spillage.

Compact – RLA’s smaller footprint only requires about one square foot of bench space.

Visit our dedicated RLA page.

Download the RLA brochure.


Confirming Correct Results
Econotech now offers Reburned Lime Reference Material. Each 2.0-gram sample comes with a Certificate of Analysis. These samples provide an easy way to confirm that your RLA is giving you correct results and is a useful tool for training staff on the consistent operation of the analyzer.

 

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