• passing extraction of gold from current tails of sandy-gravel of deposits, iron ores, phosphorites, etc.;
• increase of gold production from proper gold and complex deposits at the expense of extraction of fine and thin fractions (+ 0,02 mm);
• profitable development of subeconomic deposits and wastes.

The design, is protected by the patent:

• the sluice consists of separate complitely finished modules;
• every section represents a metal trough with the mobile panel in a bottom part, dredge rugs and cliches;
• parameters of section: length 3400 mm, width 850 mm, depth 820 mm, weight 1200 kg, power consumption 1.5 kilowatts, maximal size of particles 100 mm.
• the section can be used independently and as constituent element of wash plant.

Operation of the instrument: The movement of the panel creates fluctuation in the bottom part of a crushed ore flow, supporting a material, filling cliches, in the pseudo-liquefied condition. This reduced a drift of thin gold and silting-up of cliches. The productive time between gold gatherings raises.

The productivity of 3-section sluices is to 80 m³ of hard material per hour, that corresponds approximately to additional extraction of 5 kg of gold per one month, as long as free gold content is about 0.1 g/m³.

Advantages. The instrument combines advantages of a traditional sluice with opportunities of a concentration table. At the first stage of enrichment, fine and thin fractions gold in size down to 0.02 mm, alongside with lerge gold articles, are exctracted The instrument is much more effectuve than foreign analogues-it is more cheap and simple in exploitation.

Economic efficiency By using sluice for passing extraction of gold from iron ores and from sandy-gravel deposits, probable cost price of gold is 2-3 times blower than the world price, because of the expence of low cost of processing current tails.

Co-operation forms:

• delivery of a sluice complete with methodical support;
• joint approbation and trial tests, working out the rules;
• setting up industrial manufacture complete with author's, technological and analytical supervision.