Cement Kiln

This is a new prototype design for a customer with limited space. Cement kilns are used for the pyro-processing stage of manufacture of Portland and other types of hydraulic cement, in which calcium carbonate reacts with silica-bearing minerals to form a mixture of calcium silicates. Over a billion tonnes of cement are made per year, and cement kilns are the heart of this production process: their capacity usually define the capacity of the cement plant.

Most Portland cement is made in a rotary kiln. Basically, this is a long cylinder rotating about its axis once every minute or two. The axis is inclined at a slight angle, the end with the burner being lower.The rotation causes the raw meal to gradually pass along from where it enters at the cool end, to the hot end where it eventually drops out and cools.

At the input end blended raw material enters the kiln via the pre-heater tower. Here, hot gases from the kiln, are used to heat the raw meal. An industrial smoke stack burns and gets rid of unwanted byproducts. At the far end of the kiln is the cooled Clinker house where the finished product is released from the kiln. the product is then transferred to a storage facility where it can be loaded onto hopper cars or tractor trailer trucks to shipment to the various cement plants.

This is a custom design - if you would like to order one please contact us (button at top of page). Cost is $274.65

O Scale Track Side Speed Signs

A new addition to our Railroad and Industrial signs category are track side speed signs. These signs are common along side of the track to alert locomotive Engineers of any speed restrictions along that stretch of track.

These speed signs come in sets of four as shown below but a customer may specify a custom mix. The signs are approximately 3/4 x 3/8 inch and sit on a post that is 2 3/4 inch long and 0.10 inch (100 mil) square.

Visit our ON Line store for price and selection.

Coal Gas Manufacturing Plant

Coal gas plants were common sites from the mid 1800's all the way up to the 1950's before being replaced by natural gas (a by product of oil refineries) for heating and electricity for lighting. Coal gas was used for street lamps and gas lights in buildings and eventually home heating and cooking. At one time more than 50,000 gas plants operated in the US.

In order to fully model a coal gas plant the following structures would be needed:

  • An incoming area with pits where rail cars would dump their loads of coal. Augers, conveyors and cranes were used to move the coal to the retort ovens.

Redesign - Hopper Car Loading Shed

The loading shed has gone through a major redesign. The truck door has been relocated to the side of the building. this allows a dock to be installed both inside and outside of the door. the door is operational. It can be opened and closed. This now allows the train doors to be opened and closed also. The train doors can be built to accommodate track height. This O Scale service shed is designed to be placed over a track to let a hopper cars or box cars load / unload product. The opening for the rail car is a pass through so the building can be placed anywhere on a siding. The front includes an office door. This building will look good as a standalone structure or as an ancillary building in an ethanol or grain complex. WRT an ethanol complex this structure can serve as a Dried Distiller Grains (DDG/DDGS) storage and loading shed. DDG is the solid material left over from the fermentation process to produce alcohol from corn. It is usually sold to feed lots for cattle. DDG is loaded on to trucks for those lots close by and onto hoppers for long range transportation by rail. Approximate foot print for the building 11 inches (W) x 12 inches (L) x 6.50 inches (H) on the high side. 

The custom made product line consists of two basic materials - wood and plastic. Periodically I will showcase new product as it is designed and assembled. 

New Products

Wood Bridges and Decking for Model Trains
‚ÄčPlastic and Wood O Scale Trackside Structures
Custom Model Building Services 
‚ÄčKits and Details

O Gauge Model RR has just released their classic front steps as a standalone product. visit our OnLine Store for price and availability.

New Product - Heat Exchangers,  Accumulators and Filters

More new structures for our Oil refinery series. Heat Exchangers or Condensers in conjunction with Accumulators (Reflux Drums) are typically found connected to the top product piping of distillation (fractionating) towers. The product first flows through a set of heat exchangers for cooling then through an accumulator or reflux drum to hold the condensed vapour from the top of the column so that liquid (reflux) can be recycled back to the column or moved upstream for further processing. Final product is sometimes processed through filters before being added to storage. 

The filters are the blue painted tanks. The heat exchangers are the two horizontal tanks and the reflux drum is the larger diameter tank.

Two stage Desalting Tank

The dehydration process of a desalter will reduce a portion of the free brine as it exits the vessel. A certain quantity of brine will continue to exit as an emulsion. Depending on the product specifications, one, two, or three stages of desalting may be required to satisfy the process design requirements. Recycling reduces dilution/wash water consumption and disposal costs of the effluents.

Trackside Speed Signs

New Tank Farm Design

The standard tank farm design has been changed to make the horizontal tanks higher off the ground more in line with the vertical tank. A platform with stairs has been added and the walkway redesigned. Both version of the tank farm are available for purchase.

Scale House

If bulk commodities are a part of your railroad's freight tonnage then you are in the market for a scale house. Any time a railroad needs to weigh a car it goes to a scale house. Functionally it is a protective shed built around a large weighing machine. The scale house usually contains a large bay window so the person inside can see both ends of the car being weighed in order to write down the car identification number and view oncoming traffic. Usually a scale house is built from corrugated sheet metal however this design simulates brick for a more lasting impression.

New Barricade Stop Sign

This sign was originally designed to be part of the Intermodal Yard Security complex. It has proved to be popular for other applications so is now being offered as a standalone product.

New Fuel Loading Platform with Pump Shed

A pump shed has been added to the basic Fuel Loading Platform. The shed can be added to either the standard or Narrow Fuel Loading Platform and as with our other structures this platform can be modified (length, width, number of pump stands, lamp posts etc) to suit customer preferences.

Model Structures for Model Railroads

Crane Way

A customer needed a crane that would cross over two tracks and be able to move 15 inches. I started with a Walthers HO scale heavy duty crane kit, designed a superstructure along with a control booth. The results are shown below.

There have been more gantry cranes built since this. Some have both sides stationary while others have has on side moving along a track. If you have a custom design you would like built please contact us (button at top of page) for a quote.

  • A retort building where coal is heated and turned into gas. The building is usually recognized with a large smokestack.

  • A process building where the gas is cooled and cleaned and filtered so it can be turned into a useful product. A lot of hazardous waste product was generated here.
  • Various outdoor tanks and piping mostly used as precipitators which removed coal tar from the gas before routing it to the gasholder.
  • A storage tank commonly called the Gasholder or Gasometer. Most gasholders were recognized by the external superstructure surrounding the tank. Most tank were telescopic in nature rising as they filled with gas and dropping as the gas was released. The external superstructure acted as a guide-way for the tank as it raised and lowered.

Model Structures has designed a coal gas manufacturing facility that contains a the process building, the precipitation tanks and the gasholders. The process building starts out as the MTH 30-90105 Public Works building. It is dismantled and repainted. An interior is added that consists of structures necessary for cleaning and filtering the gas. External precipitation tanks are added along with the structure most recognized - the gasholder.

New Building Fronts

Four new building fronts have been added to the portfolio

Hopper Car / Tank Car Inspection Rack

A new design - this rack can be located in any yard or industrial area where inspection or loading of a hopper car or tank car is required. The inspection platform can be lowered onto the car or raised out of the way. Piping can be designed in to make the inspection rack a loading rack.