ron ions removal equipment projects are under installation in foreign country. What are the reasons why so many enterprises at home and abroad choose Beihai Galvanizing Equipment Co., Ltd?
First, let's look at why we need iron ion removal equipment.
In the production of hot-dip galvanizing industry, after pickling steel with hydrochloric acid, it is necessary to carry out cleaning and fluxing assistance before it can be dipped into a zinc kettle for hot-dip galvanizing. Therefore, a large number of iron ions impurities will be brought into rinsing tank and fluxing tank. If the iron ions cannot be removed in time, it will be brought into the zinc kettle, and it is one of the main reasons for the production of zinc ash and zinc dross. At the same time, a large number of iron ions are brought into the zinc kettle, greatly reducing the fluidity of the molten zinc, and thus affecting the quality of the workpieces.
2. Purpose of Iron Ion Removal
2.1. Completely solve the ratio of acid, iron, ammonia and zinc in the solvent tank.
2.2. Realize the recycling of the fluxing agent, so as to achieve zero emissions.
2.3. Discard or reduce the capacity of the rinsing tank, improving the production efficiency.
2.4. Improve the fluidity of molten zinc and surface quality of workpieces.
3. Feasibility Analysis
3.1. Composition Analysis of Solvents
In the Fluxing Agent Reaction Tank, the main useful components are zinc chloride, ammonium chloride, explosion-proof agent, in addition to iron dichloride, H+ ion, OH- ion, iron ion mud, impurities and other metal ions. Zinc chloride, ammonium chloride and explosion-proof agent can exist stably in the solvent with ph value from 0 to 4.5. Iron dichloride, iron ion mud, impurities and other metal ions are the main sources of zinc dross and zinc ash.
3.2. Chemical Reaction Analysis
In weak acid environment, by adding proper proportion of ammonia and hydrogen peroxide (oxidant), the divalent iron ion in the solvent is oxidized to trivalent iron and then precipitated.
3.3. The Possibility of Precise Control
High-speed and stable data acquisition, input and output control system (nTouch), the sampling rate is greater than 1Kbps, communication rate is greater than 9600bps, and ammonia and hydrogen peroxide can be added in appropriate proportion.
3.4. Membrane Filtration Possibilities
Since the formed Fe3+ precipitates are larger than the diameter of the membrane filter hole, therefore the Fe3+ precipitates are left in the pressure filter and the water containing ammonium chloride and zinc chloride is returned to the solvent tank.
3.5. Economic Feasibility
3.5.1. The national standards and requirements for environmental pollution discharge has been raised, and the cost of wastewater treatment or disorderly discharge has increased.
3.5.2. Due to the reduction of impurity ions in the fluxing tank, the probability of producing zinc ash and zinc dross due to the ions being carried into the zinc kettle is greatly reduced, and the output of zinc ash and zinc dross is also reduced, thus producing 2-3 kg of zinc dross per ton.
3.5.3. The fluidity of molten zinc increased, and the surface finish improved, thus greatly saving the consumption of zinc.
3.5.4. The output of zinc dross and zinc ash is reduced, then the temperature change of zinc kettle is so small, so it will improve the quality of products.
3.5.5. Less zinc dross and zinc ash are produced, ang then less energy is consumed.
Beihai Iron Ion Removal Equipment is your best choice!
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