The core differences between ore shaking tables and slime shaking tables lie in their processing particle size, bed structure, operating parameters, and separation principles. They are respectively suited to the gravity separation needs of coarse/fine and ultrafine particles. Specific differences are as follows:
I. Applicable Particle Sizes
1. Mineral Sand Shaking Table: Processes coarse, medium, and fine particles ranging from 0.074 mm to 2 mm, with coarse sand ranging from 0.5 to 2 mm and fine sand from 0.074 to 0.5 mm.
2. Slime Shaking Table: Processes ultrafine slime particles < 0.074 mm (-200 mesh).
II. Bed Structure
1. Bed Strips (Riften Strips): Ore shaking tables have rectangular cross-sections, are tall and wide, with deep and wide grooves, and are relatively few in number (approximately 40-50 strips, commonly 46 or 60 grooves), sparsely arranged, alternating in height, tapering off along two diagonal lines at an angle of approximately 40°; Slime shaking tables have triangular/rhomboid cross-sections, are low and densely packed, and are extremely numerous (≥120 strips, commonly 120, 138, or 150 grooves), arranged very densely and equidistantly, mostly consisting of all low strips plus a few high strips, tapering off gently along one diagonal line at an angle of approximately 30°.
2. Bed Slope: Mineral Sand Shaking Tables have steeper slopes (> 4°, commonly 4°–5°); Slime shaking tables have very gentle slopes (< 2°, commonly 1°–1.5°). 3. Bed Surface Form: Mineral sand shaking tables are mostly corrugated or double-section structures, and can be made into straight grooves, double-corrugated grooves, or triple-section grooves; mineral slime shaking tables are usually flat or single-section structures, with only straight grooves and no corrugations.
4. Bed Surface Material Matching: Mineral sand shaking tables mostly use rubber/thick wear-resistant layers to resist coarse particle wear; mineral slime shaking tables mostly use paint putty, thin fiberglass, and smooth surfaces to reduce fine slime adhesion.
III. Operating Parameters
1. Stroke/Number of Strokes: Mineral sand shaking tables have a large stroke and low stroke rate; mineral slime shaking tables have a small stroke and high stroke rate.
2. Lateral Water Flow: Mineral sand shaking tables have a larger water flow and strong scouring force; mineral slime shaking tables have a very small water flow, forming a thin water film.
IV. Separation Principle
1. Mineral Sand Shaking Table: Separation relies on strong turbulence and water jetting within the bed grooves. Coarse heavy minerals are transported longitudinally along the bed grooves, while light minerals are washed away laterally by the water flow. The core principle is to separate coarse particles through “stirring” and “flushing”.
2. Slime Shaking Table: Utilizes laminar shearing and weak differential stratification through a thin layer of water flow. Fine heavy ores slowly settle and move along the table, while light ores drift slowly with the water film. The core principle is the “stable” and “slow” separation of fine slime.
V. Application Scenarios and Performance Characteristics
1. Sand Shaking Table: Used for roughing/cleaning of coarse and medium-grained placer ores such as tungsten, tin, gold, and ilmenite. It handles particles larger than 0.074 mm, offering high throughput, high enrichment ratio, and good concentrate grade. It provides stable recovery of particles larger than 0.1 mm.
2. Slime Shaking Table: Used for the recovery of flotation tailings, fine slime tailings, and difficult-to-separate fine-grained tin/tungsten/tantalum-niobium particles. It handles ultrafine particles <0.074 mm through scavenging/cleaning. It offers low throughput, extremely high enrichment ratio, and high fine particle recovery rate, effectively recovering ultrafine particles from 0.02 to 0.074 mm.
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