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Mississauga, Canada

Hatch is a global multidisciplinary management, engineering and development consultancy. Its group companies have more than 11,000 staff in 65 offices on six continents. In 2009 it was one of the 100 largest companies in Canada, with sales over CDN $1 billion.The company was founded in Toronto, Canada, by W.S. Atkins as W.S. Atkins & Associates in 1955. The company initially was involved in subway tunneling and other civil engineering projects, and expanded into metallurgy when Gerry Hatch joined the company in January 1958. It became known as Hatch in 1962. Hatch counts among its metals clients the top 20 mining and metals companies in the world, including Alcan, Alcoa, BHP Billiton, Barrick Gold, BlueScope Steel, Xstrata , Vale and Rio Tinto.In 1996 the company began an expansion program by purchasing several aligned engineering companies including Billiton Engineering , Rescan Mining , BHP Engineering , Kaiser Engineers , Acres International , and MEK Engenharia . By 2005 the combined billing of the company was around CDN $700 million.Hatch today provides consulting, operations support, technologies, process design, and project and construction management to clients in three principal sectors: mining and metals; energy; and infrastructure.The company's main offices are in Canada, Australia, South Africa, Chile, China, Brazil, Peru, Russia, United Kingdom, and United States. They also have several smaller offices around the globe. Wikipedia.

Hatch Ltd. | Date: 2014-02-06

Provided is an acid mist control apparatus for the control of acid mist emissions in an electrolytic cell. The apparatus includes an elongate hood having longitudinal edges, an upper surface and a lower surface; and a receiving aperture which is adapted to receive therethrough an anode of an electrolytic cell.

Hatch Ltd. | Date: 2013-02-15

An apparatus connects first and second conduits that convey a flow of gas. The apparatus includes a first flange element fixed to the first conduit, and a second flange element fixed to the second conduit. The flange elements are coupled together to permit fluid communication in an internal environment between the first and second conduits. At least one port is intermediate the flange elements to deliver a flow of purge gas therebetween. The at least one port may be located within a purge gas channel arranged in one of the flange elements. A pressure gradient of the flow of purge gas may substantially prevent at least one of fluid egress from the internal environment and fluid ingress from an external environment. Purge gas distribution systems and related methods are also described.

A method is disclosed for controlling retention time in a reactor, such as an autoclave, having a plurality of compartments separated by dividers with underflow openings. A retention time of the reaction mixture is calculated and compared with an optimal retention time, and the volumes of the reaction mixture in the compartments are adjusted while maintaining the flow rate of the reaction mixture, so as to change the retention time to a value which is closer to the optimal retention time. The reactor may include a level sensor in the last compartment for generating volume data; a control valve for controlling the liquid level in the last compartment; and a controller which receives volume data from the level sensor and controls operation of the control valve.

Hatch Ltd. | Date: 2012-04-11

A re-entrainment prevention apparatus (

Hatch Ltd. | Date: 2013-04-05

A burner is provided for a pulverous feed material. The burner has a structure that integrates the burner with a reaction vessel, and has an opening that communicates with the interior of the reaction vessel. The burner also has a gas supply channel to supply reaction gas through the opening into the reaction vessel, and a feed supply for delivering pulverous material to the reaction vessel. The burner also has a fluidic control system having at least one port capable of directing a stream of fluid at an angle to the direction of flow of the reaction gas so as to modify the flow of the reaction gas. In addition, components are provided to modify the swirl intensity and turbulence intensity of the reaction gas independently of the exit velocity.

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