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"Black Sand" is dredged in huge quantities from Hanoi's rivers. The fine sand is simply sucked from the riverbed as a slurry into barges, which then head to shore where the process is reversed and the sand slurry is pumped ashore onto naturally-draining stockpiles.
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This style of vertical kiln is gradually replacing many of the traditional "intermittent" brick kilns in Vietnam; this design of kiln runs continuously. The screw mechanism just visible in the arch at the bottom of the kiln supports a stack of bricks as it works its way through the kiln from top to bottom; th...
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This factory (run by the LuaViet Metallurgic Materials JSC) made refractory bricks which are used to line electric arc furnaces for steel production (to stop the furnace itself from melting). The finely ground raw mineral (a relatively pure form of Magnesium Oxide) was mixed with a polymer binder, compacted into a prec...
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Most of the raw ingredients for the cement come through this rotary mill where they are ground to a very fine powder by steel chains.
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Sometimes the moisture content of the raw ingredients for the cement manufacture is too high; this coal-fired kiln is used to dry the materials.
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This view shows the various crushers, screens and conveyors used to convert the quarried rock into useable material for the cement kiln, blockmaking plant and truck-supplied aggregate deliveries.
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One of the two quarries feeding aggregate to the cement kiln. Aggregate was also supplied to (i) an on-site concrete block making plant, and (ii) off-site concrete batching plants via road truck deliveries.
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- 279
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Here's a view of one of the numerous new bridges being built over Hanoi's rivers.
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One of three views taken at a small foundry where scrap metal was being recycled and cast into billets which went on to be used for making rebar, strip and angle sections.
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- Preliminary version - inside a comparatively modern and well-equipped brickworks in Vietnam by Tony Tapp
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This view just about shows the entire brick production process - from raw ingredients to a ready-to-fire brick.
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