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Limestone business profits from smarter washing solution


American aggregates producer H&H Stone has successfully generated more than two million tonnes of in-spec concrete sand from a previous waste stream material.

Part of that success can be attributed to H&H Stone’s purchase of MWS Washing Systems’ modular SandStorm range, which is renowned for delivering the highest level of quality spec material with its smarter design and innovative features. 

With 40 SandStorm plants now operating globally, the range is designed to eliminate typical spillage areas, creating a clean, safe working environment. According to MWS, the SandStorm plants are a key part of many quarrying producers’ equipment portfolios.

Engineered with the producer in mind, MWS’s focus on easy maintenance has helped to lower the total cost of ownership while providing a quality product to help its customers increase their operating profits.

The SandStorm 516 and 620 plants allow operators to maximise production up to 500 tonnes per hour while producing up to three aggregates and two grades of specification sand. Compact and customisable, equipped with smart technology, and designed for quick and easy on-site assembly, these units are a practical solution for most quarry applications.

Dave Hamman, owner of H&H Stone, said he has seen many benefits since May 2017, when he installed a SandStorm 620 plant to transform a valueless waste product stream at the firm’s Bolingbrook, Illinois limestone quarry into a high value C33 concrete sand. 

“It’s doing an excellent job, better than any type of equipment I’ve used in the past,” Hamman said. “When making a major investment in equipment such as SandStorm, relationships come into play. Challenges always occur, and it’s then that people want to work with others whom they are comfortable with and respect.

“The MWS team are cordial, easy to work with and easy to do business with. They addressed all our issues and have been there when we needed them,” he added.

H&H Stone’s SandStorm 620 has produced in-spec concrete sand from a previous waste stream.


Billed as a modular, mobile wash plant, the SandStorm 620 is 45m long, 34m wide and eight metres high. 

Hamman appreciates the equipment’s “relatively small” size and its mobility — which he said is part of the reason H&H Stone bought it. 

One crucial component of the equipment is the unit’s speed. “It’s running about 250 tph, and we are very satisfied with its production,” Hamman said. 

The Sandstorm 620 can produce up to four wash products at once. It offers a variable speed belt feeder and an adjustable hopper door for consistent material feed and has dual and single sand options for up to 500 tph.

According to Hamman, the fully automated machine is user-friendly and easy to use because it is touchscreen-operated, is radio-controlled and has an advanced automated control system. 

In turn, Hamman said the machine is a “very quiet, clean plant with very little spillage and the results so far confirm that our investment has paid off very quickly”.

These days the by-product is sold instead of piled. It is a money-maker and helps H&H Stone and the Hamman family continue to prosper in the quarrying business.

Since 2017, the equipment has run consistently for more than 5000 recorded hours and produced more than two million tonnes of in-spec concrete sand from a previous waste stream material.


MWS Washing Systems designs and manufactures a full range of modular, mobile and static washing equipment for the aggregates, waste and recycling, and construction and demolition sectors. In 2019, MWS became a part of the Metso Corporation, which offers equipment solutions and services for the global mining, aggregates, recycling and process industries.

In January 2021, MWS Washing Systems will be launching a new brand identity that will support the evolution of its washing capabilities.

In Australia, MWS Washing Systems plant is available through national distributor 888 Crushing & Screening Equipment.

Source: MWS Washing Systems/888 Crushing & Screening Equipment 

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