Jig process

Fabrics can be desized and scoured in open width form using a jigger, which is one of the oldest and most universal machine in textile finishing. A centrally controlled fully automated jigger (Fig. 5-7) to secure improved processing quality with 

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Hydraulic separation depends on a process called jigging, which creates a panicle siratifiealion from an alternate expansion and compaction of a bed of panicles by a pulsating fluid How. As originally developed, a baskel tilled with material was moved up and down in a lank filled with water. The more modem Baum jig process utilizes an air impulse concept in which the water is moved hy air pressure front an adjacent sealed chamber There are several refinements of the process, including the McNally Norton standard washer. 

The pad jig process represents the easiest type of fixation of pad dyeings. The material padded with dye is passed through a salt liquor in a jigger at 80-90 °C, thus preventing desorption of the dye. In this process, additional dye can be added during jigger treatment for shading. 

In the pad jig process, after the material is padded with dye and wetting agent, it is treated in a jigger at the dyeing temperature. The liquor contains the reducing agent, salt, and some padding liquor. 

Gravity concentration, ie, the separation of ore from gangue based on the differences in specific gravities, using jigs, heavy—medium separators, or spiral concentrators for example, is appHcable for lead ores. However, the predominant beneficiation technique used in modem plants is the bubble or froth flotation (qv) process (4,5). 

Water Consumption Jigs require much water. In most installations, the Harz-type jig uses 0.006 to 0.01 m water/kg (1500 to 2500 gal/ton) material treated. Water requirements for treating minus 10-mm (%-in) iron ore in a Wemco-Bemer rougher-cleaner jig circuit are approximately 0.005 m water/kg (1200 gal/ton) of material processed. 

Air separation Jig separation Pneumatic separation (stoners) Used to separate light (organic) materials from heavy (inorganic) materials in solid waste Used to separate light and heavy materials in solid waste hy means of density separation Used to separate light and heavy materials in solid waste Zig-zag-air, vihrating-air, rotary-air, and air-knife classifiers used with processed wastes shaldng-tahle ... 

Define the special tools, processing equipment, jigs, fixtures, and other equipment required to produce the product. (General-purpose tools and equipment need not be specified because your staff should be trained to select the right tool for the job.)... 

Processing utilises rack and jig techniques, and not barrels, in order to control low levels of agitation. 

The definition of turnover time is total burden within a reservoir divided by the flux out of that reservoir - in symbols, t = M/S (see Chapter 4). A typical value for the flux of non-seasalt sulfate (nss-SOl"") to the ocean surface via rain is 0.11 g S/m per year (Galloway, 1985). Using this value, we may consider the residence time of nss-S04 itself and of total non-seasalt sulfur over the world oceans. Appropriate vertical column burdens (derived from the data review of Toon et ai, 1987) are 460 fxg S/m for nss-801 and 1700 jig S/m for the sum of DMS, SO2, and nss-S04. These numbers yield residence times of about 1.5 days for nss-S04 and 5.6 days for total non-seasalt sulfur. We might infer that the oxidation process is frequently... 

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