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Latest update: 21.09.2022
AJAX Equipment
TEL: +44 1204 386723
Milton Works, Mule Street
BL2 2AR   Bolton
United Kingdom
Contact
+44 1204 386723
Mr. Lyn Bates
Chairman
+44 1204 541904
Mr. Eddie McGee
Managing Director
+44 1204 541902
Mr. Mark Waters
Finance/Commercial Director
+44 1204 541900
Mr. Matt Barnes
Production Manager
Website
www.ajax.co.uk
Company video
Company brochure
Company brochure

Ajax was formed in 1970 to specialise in the design and manufacture of equipment to handle and process bulk solids. Our factory extends over 3000 sq. m and incorporates extensive fabrication facilities for mild and stainless steel, aluminium and hi nickel alloys. The design office uses 2D and 3D technology to enhance the design process and the technical services we provide include powder flow property testing and practical feed and processing trials. We use our understanding of flow behaviour allied with an innovative approach to generate equipment designs which are well considered for the individual application.

The work that is undertaken by Ajax is distinguished by specifying designs that best meet the client’s requirements and is often bespoke rather than standard ’off the shelf’ forms of equipment.

Our works is about a mile from the town centre and 12 miles North West of Manchester. Bolton itself has become strategically placed within the motorway network, having access to the M60, M61 and M62 within several miles thus offering quick and easy access from all parts of the North of England and, via the M6 and M1, the rest of the country.
Products, services
 Screw feeders - Screw Feeders are constant displacement devices that employ a variable speed drive to provide volumetric control of powder flow.
 Screw conveyors - Screw conveyors accept a controlled feed from upstream equipment such as a screw feeder or a rotary valve.
 Hoppers - Hopper Design, Hopper Inserts. Hopper and Feeder Interface, Powder Testing for Flow
 Continuous mixers - AJAX mixers produce a high quality mix at the ’scale of scrutiny’ because of the efficient multiple and progressive actions of paddles or ribbons.
 Lump breakers - Multiple mechanisms are used by the Ajax lump breaker to reduce the lump size.
 Rigid IBC’s - The LynFlowTM bin system matured from many years of expertise by Ajax in powder technolog
 Heat exchangers - The AJAX range of screw based continuous heat transfer equipment includes machines to heat or cool materials (whilst mixing or conditioning)
 Screw flights - AJAX Equipment produce screw augers and flights only for new applications as well as damaged or worn out equipment.
 Screw elevators - Ajax screw elevators are offered for a wide range of throughputs, product characteristics and site layout needs
 Sack Tip Stations - AJAX Sack Tip stations feature an enclosed chamber in which sacks may be emptied remotely avoiding generation of dust clouds and wastage of product.
 Powder Testing for Flow - powder properties, bulk flow characteristics: bulk density, wall friction, shear strength
Categories
Storage - Silo services - Bridging properties
Handling - Handling of bulk containers, IBC`s - Bulk containers, IBC`s
Particle size reduction - Crushers, mills - De-lumpers
Conveyors - Pneumatic transport - Diverters for pneumatic transport
Handling - Handling of drums, barrels - Emptying drums, barrels
Show more
Categories
Storage - Silo services - Bridging properties
Handling - Handling of bulk containers, IBC`s - Bulk containers, IBC`s
Particle size reduction - Crushers, mills - De-lumpers
Conveyors - Pneumatic transport - Diverters for pneumatic transport
Handling - Handling of drums, barrels - Emptying drums, barrels
Handling - Handling of bags, sacks
Handling - Handling of big bags
Handling - Handling of drums, barrels
Handling - Hoppers
Mixing, blending - Mixers
Mixing, blending - Mixers - Paddle mixers
Conveyors - Screw conveyors >>
Storage - Silo discharge - Screw feeders for silo discharge
Cooling/Heating - Coolers, heaters - Screw heaters/coolers
Storage - Silo services - Silo design
Conveyors - Vertical screw conveyors
Storage - Silo services - Wall friction

Articles

Hopper inserts, an approach to solving poor flow Enhanced hopper performance through sustained examination of materials, hopper geometries and influence of insert design.
Hopper inserts, an approach to solving poor flow
Enhanced hopper performance through sustained examination of materials, hopper geometries and influence of insert design. The enormous volume of bulk materials handled every year means solids must be stored in hoppers, intermediate bulk containers, silos and other storage devices, often several times before being processed. However, storage can result in a number of handling issues including erratic surges, arching, ratholes, packing, flushing, dead regions, feed upsets, and in some cases can reduce the suitability of the product for the next process stage [IMG02**R45] Although it is seemingly counterintuitive to introduce an obstacle into the storage container as a solution to these problems, the use of inserts can enhance storage container performance. An insert is usually a static fitting on the inside of a bulk storage container, including liners and other modifications that alter the internal space of a vessel. Flow regimes are determined by how the individual particles in a bulk solid respond to local forces at contact points. An insert alters the flow regime of a material
02.10.2021  |  2299x  | 
About the gully angle of pyramid shaped hoppers Recommendations for proper flow from rectangular or pyramid shaped hoppers, in view of the corners of the hopper that are less steep.
About the gully angle of pyramid shaped hoppers
Recommendations for proper flow from rectangular or pyramid shaped hoppers, in view of the corners of the hopper that are less steep. Rectangular hoppers are widely used to store bulk solids. Although convenient to fabricate they have process drawbacks in that large flat sides are prone to deflection, so often require stiffening, and the converging faces form gully angles that offer poor flow and self-clearing properties. Some small compensation is given by the rectangular outlets being somewhat easier to fit with slide valves. ​​ Gully angle The gully angle of a symmetrical, pyramid shaped hopper is roughly 10 degrees less steep than sides and is prone to retention of product unless it is radiused. Flow pattern For mass flow design purposes, the inclination of the gullies should be considered as a cone. For funnel flow hoppers the gully angle should exceed the wall friction angle by at least 10 degrees. Some product retention in the corners is almost inevitable unless the corner is radiused or significantly increased in inclination. Mass flow in two steps Mass flow is much more practical
01.09.2021  |  2555x  | 
Hopper Design Process
Hopper Design Process
The first stage of the hopper design process commences with establishing the form of flow regime that should be generated when discharging. . Basic choices 1. Mass Flow. For products that deteriorate in some way over time and are to be held in hoppers that may be re- filled before fully emptying. 2. Expanded Flow. For products with poor flow properties that either do not deteriorate in extended storage or the non-mass flow contents will be discharged before the hopper is re- filled. 3. Funnel Flow. For free flowing products that do not deteriorate during extended storage time. Geometric form The second stage is to choose a geometric form for the storage container, usually either circular, with conical hopper section or rectangular, with pyramid or slot outlet. The outlet region may be transformed to a chisel shape to exploit the flow benefits of plane flow and slot outlets. Eccentric shapes and multiple outlets are normally best avoided. This choice tends
11.08.2021  |  1839x  | 
When to select a ‘Bullet’ or ‘Cone-in-Cone’ insert
When to select a ‘Bullet’ or ‘Cone-in-Cone’ insert
Flow inserts can be used for many different reasons, such as improving flow, reducing overpressures on feeders, rectifying segregation and inhibiting ‘Flushing’. They are often installed as retrofits to overcome operating problems, but require experienced design to secure optimum benefits without introducing other problems. The ‘Cone-in-Cone’ and ‘Bullet’ Types are amongst methods used to improve flow by converting a flow regime from Funnel to Mass flow. The question is : -which type is most appropriate for a given application? The ‘Bullet’ insert is a central fitting of a diverging and converging cone that forms an annular flow channel in the hopper. The degree of cone convergence is chosen to ensure the material will mass flow when discharging. A drawback of this device is that the hopper capacity is reduced by the volume of the fitting. This may be compared with the Cone-in-Cone insert, where a steeper cone is installed in the center of the
04.08.2021  |  704x  | 
Show more (39)

Posts

11-metre-long quadruple multiscrew feeder Ajax included a number of features to ensure reliable handling in this waste-to-energy process.
11-metre-long quadruple multiscrew feeder
Ajax included a number of features to ensure reliable handling in this waste-to-energy process. With four 11-metre-long screws in a casing 3.6 metres wide, Ajax’s biggest multiscrew feeder truly is an impressive piece of solids handling machinery,” said Eddie McGee. The mild steel feeder will transport refuse derived fuel from a hopper as part of a waste-to-energy process. As waste can be irregularly shaped as well as poor flow, Ajax included a number of features to ensure reliable handling. Eddie commented, “The feeder’s design pays special attention to screw geometry and clearances. While over the outlet section the feeder includes relief overload flap plates should the subsequent conveyor fail to take the product away. In the event of maintenance, the feeder’s design allows one of the four screws to be removed and the machine to continue to operate at full plant rate .”
01.10.2021  |  2676x  |  Product news  | 
Bulk technology is not rocket science; it’s more difficult Rules for the Characterisation of Bulk Materials
Bulk technology is not rocket science; it’s more difficult
Rules for the Characterisation of Bulk Materials Bulk technology is not rocket science: it’s not that easy. Moreover, rocket scientists agree. A recent paper by NASA: - ‘Granular Materials and the Risks They Pose for Success on the Moon and Mars’, summarizes the uncertainty that surrounds many aspects of bulk handing. The NASA paper states: ‘Working with soil, sand, powders, ores, cement, etc. and using hoppers, are so routine, that it seems straightforward to do it on the moon and mars as we do it on earth. This paper brings to the fore how little these processes are understood and the millennia-long trial-and-error practices that lead to today’s massive over-design, high failure rate, and extensive incremental scaling up of industrial processes because of the inadequate predictive tools for design’. This state of affairs was also confirmed by two well-cited Rand reports that compared the performance of a number of new solids handling installations with others handling liquids and gasses. It should
20.08.2021  |  484x  |  Insight  | 
Screw feeders: not only for dosing Screw feeders can not only dose, but also store additional capacity, save headroom and improve flow performance.
Screw feeders: not only for dosing
Screw feeders can not only dose, but also store additional capacity, save headroom and improve flow performance. Screw feeders are widely used to control the rate of discharge from bulk storage hoppers, but they also enable extra capacity to be stored, headroom saved and flow performance improved. When designed as an integral part of the storage system they rectify segregation occurred during the filling of the hopper and provide optimum conditions to counter any tendency for the contents to ‘flush’ during discharge. However, to secure maximum operating benefits the extraction pattern per unit length of the feeder should match the cross sectional area of the hopper that it serves. As the feeder is usually shorter than the hopper dimension, the extraction rate demand at the start and end of the feeder opening can vary to many times that of the intermediate sections. A common technique employed to generate progressive extraction along the length of the outlet slot is to increase the screw pitch. Apart from the fact that the initial section of screw exposed to the hopper
16.07.2021  |  3345x  |  Product news  | 
Secure relevant powder test values Many issues that arise in the performance of bulk handling plants relate to the condition of the material and disputes centre on the party responsible. By Lyn Bates, Ajax, Bolton, UK
Secure relevant powder test values
Many issues that arise in the performance of bulk handling plants relate to the condition of the material and disputes centre on the party responsible. By Lyn Bates, Ajax, Bolton, UK A key factor is whether the unacceptable material condition is the result of the supply being outside the range defined in the contract specification , or is a result of changes taking place during the handling processes. Various properties of the material must be known or assumed with a high degree of confidence for design purposes and a responsible supplier would be assured of these values before proceeding to manufacture, either by experience, or testing ‘representative’ samples in the case of any uncertainty. The following steps are recommended to secure and record the essential details. 1. Have clear reasons for conduction of the tests, to make sure that the tests conducted are necessary and relevant to the purpose of interest. 2. Identify and record the true source and history of powder sample(s) for testing. Secure an authorised and dated signature by a responsible person to verify that it is, Or they are), fully ’Representative’ sample’ of
19.04.2021  |  2999x  |  Insight  | 
Expanded flow, the neglected solution Mass flow, with well known flow and operational benefits, is not always feasible. In these cases expanded flow may be a viable option.
Expanded flow, the neglected solution
Mass flow, with well known flow and operational benefits, is not always feasible. In these cases expanded flow may be a viable option. The flow and operational benefits of mass flow are now well known, but the size of headroom required for the adoption of this flow regime is often a strong disincentive to its wider adoption. However, it is important to appreciate that there are three separate reasons to adopt a mass flow design and that one of these can be more economically secured by an expanded flow type of construction. Reasons for mass flow design * To avoid dead reasons of storage for materials that may deteriorate in either flow condition or value over time in storage zones that have indefinite holding periods. It should be noted that this reasons only applies if the hopper is to be refilled before it completely empties. * To minimise segregation by virtue of a mainly ‘First-in, first-out’ flow pattern. Velocity gradients across a converging flow channel upset a true reversal of the loading sequence. * To secure reliable flow though smaller outlets and avoid the danger of ‘ratholes’,
21.12.2020  |  1091x  |  Product news  | 
Glossary of Terms in Powder and Bulk Technology An explanation of terms relating to particle technology as an introductory tool for non-specialists, newcomers and students in the field.
Glossary of Terms in Powder and Bulk Technology
An explanation of terms relating to particle technology as an introductory tool for non-specialists, newcomers and students in the field. Bulk solids play a vital role in human society, permeating almost all industrial activities and dominating many. Bulk technology embraces many disciplines, yet does not fall within the domain of a specific professional activity such as mechanical or chemical engineering. The British Materials Handling Board perceived the need for a Glossary of Terms in Particle Technology as an introductory tool for non-specialists, newcomers and students in this subject. The glossary was prepared by Lyn Bates for The British Materials Handling Board (BMHB). It contains an Introduction, with 3 paragraphs: Bulk solids in industry; Rand Reports on the performance of plants that handle bulk solids; and General terms. Sections of terms Then term in the glossary are grouped in the following sections: Types of Powder, Powder Properties, Powder Processing, Particle Properties, Particle Size, Particle Shape, Pore Size and Shape, Particle Surface Area, Particle Test Methods (of Image
14.12.2020  |  1276x  |  White paper  | 
Lanxess increases prices for inorganic pigments Specialty chemical company LANXESS is raising its prices for Bayferrox iron oxide and chromium oxide pigments globally with immediate effect.
Lanxess increases prices for inorganic pigments
Specialty chemical company LANXESS is raising its prices for Bayferrox iron oxide and chromium oxide pigments globally with immediate effect. Specialty chemical company LANXESS is raising its prices for inorganic pigments globally with immediate effect, subject to existing agreements. Quotations will be increased by EUR 150 minimum per metric ton or its equivalent in local currency. In some cases, price increase can be higher depending on product group and production site. Customers will be contacted individually as it applies to their products. The price adjustment is required due to constantly raising raw material and energy cost as well as much higher freight rates. The LANXESS Inorganic Pigments business unit is the world’s largest manufacturer of synthetic iron oxides pigments and a leading producer of inorganic chrome oxides pigments. These products have a track record going back many decades as colorants for building materials, paints and coatings, plastics, paper and other applications. These high-tinting-strength inorganic pigments are produced according to strict sustainability criteria. The
01.01.2020  |  2908x  |  Press release  | 
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