After addition of silver and zinc refining, the residue is still fluid Bi 1.5 to 3.5% zinc, zinc chloride after refining slag outputs chloride, zinc chloride is a raw material to produce chemical products. First, the process The process flow is shown in Figure 1, including processes such as dissolution, purification, and concentration. Figure 1 Zinc chloride production process Second, the main technical conditions (1) Dissolving. 1:1t liquid to solid ratio was accelerated dissolution can be directly caught into the steam heating pipe, the density of the resulting solution 1.5 to 1.55 g / cm 3, typically using an aqueous two-stage countercurrent leaching. (2) One purification. Plus zinc replacement heavy metal impurities other. Boil the solution and stir it when adding the zinc powder. For the replacement, the zinc powder should be added 2 to 4 times. The amount of zinc powder is 3% to 4% of the amount of zinc chloride slag. (3) Secondary purification. The supernatant is extracted to a purification tank, and chlorine gas is oxidized to remove iron . The amount of chlorine gas is 5%, and the method of adding potassium chlorate may also be used. The oxygen-passing time is generally 1 to 3 hours. (4) Water releases iron. The chlorinated solution is heated to boiling, 7 to 8% of CaCO 3 is added, and about 1% of BaCl 2 is added to control the pH to 5.2 to 5.7, and the iron is hydrolyzed and precipitated. (5) Concentrated and boiled. Enamel cooking pots to fire on coal paste solution, crushed by a bar, coolish packaging should prevent moisture. Third, the main equipment Dissolving and purifying three tanks; one vacuum suction filter; the concentration tank adopts a jacketed enamel reaction kettle. Fourth, product use Zinc chloride is widely used in agriculture and medicine. Used as preservative and disinfectant in dyeing and weaving industry, as wood preservative, organic synthetic dehydrating agent, condensing agent and catalyst; used in electroplating galvanizing; manufacturing dry battery, welding flux; manufacturing rubber paper, zinc pigment, fireproof wood; Astringent, corrosion inhibitor. V. Product quality The product has ZnCl 2 ≥ 98.0%, Pb ≤ 0.002%, Fe ≤ 0.001%, Ba ≤ 0.3%, and SO 4 2 - ≤ 0.01%.
The Overhead Crane can be Single Girder Overhead Crane, Double Girder Overhead Crane or multi-girder overhead crane with capacity 1t to 800t. Overhead crane work with Electric Hoist or crab trolley as hoisting mechanism, which is used for general purpose materail handling at workshop, warehouse, metallurgy plant, power plant, paper mill, steel mill, waste incineration plant, etc.
The hoisting sling device of overhead crane can be hook, shell grab, grab bucket, clamps, magnet beam, magnet chuck, fork, or other special devices for special industry. Weihua also provide FEM/DIN standard overhead cranes with light self-weight, modular design, beautiful looking, less noist and anti-sway smooth running.
Main Data of Overhead Crane:
Capacity: 1t - 800t or custom
Span: 6m -32m or custom
Lift Height: 6m - 32m or custom
Work Duty: A4, A5, A6, A7 or custom
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