In the non-ferrous metal copper hydrometallurgical process to solve lined stereotype coating electrolytic cell defects in the production process, especially when the the stereotype injured penetration of the solution, not only need to stop production to repair, but also ordinary cement concrete by acid etching, resulting in a lot of calcium in cement concrete and sand, into the electrolytic solution and the anode precious metal content. To create great difficulties for production management. At home and abroad over the years a lot of trial and research, to create a different type of tank, such as the use of soft polyethylene plastic lining, resin glass reinforced plastic lining and acid-resistant porcelain lining, and some even use the whole granite electrolyzer, the overall FRP electrolyzer ...... Have achieved some success, but there are also their own limitations.
    Polymer concrete is a composite made of organic and inorganic materials meet the material with good physical properties and chemical properties of synthetic resin, with the continuous research and development of organic cementitious materials (synthetic resin), one after another, greatly improved and improve the polymer and concrete mechanical resistance to corrosion and insulation performance, polymer concrete to produce copper electrolyzer, will greatly enhance the effect of the use of the tank.
    Polymer concrete production electrolyzer key issues to be addressed these two issues of economic and technical possibilities of construction.
    Gelling materials of the polymer concrete ships: an unsaturated polyester resin, a furan resin, an epoxy resin, etc. the late seventies YJ furan resin (modified furan resin) development, with its low viscosity and anti-corrosion can and unique technical performance and good heat resistance, use it to develop polymer concrete, able to meet the technical performance of the copper electrolyzer and production technology requirements. Since 1983, we use it to develop copper electrolyzer, to obtain better economic and social benefits, praised by production workshop. Technical appraisal organized by the China Nonferrous Metals Corporation in November 1987, to get to the meeting of experts unanimously affirmed. To consider the economic rationality, we has developed ordinary cement concrete and polymer concrete composite tank and fasting polymer concrete tank. This new tank will be 1/4 of the amount of resin can save, effectively reducing the cost of the tank body. In the production process, we have adopted this novel assembly method construction process, to overcome the polymer concrete during the solidification of a variety of additional internal stress. Tank precast pretensioned prestressed concrete construction technology, greatly improving the tank crack resistance, enhance the stiffness of the tank, get a good economic effect. A total of 376, Wuhu smelters, cement lining stereotype slot now basically replaced YJ furan resin concrete tank and epoxy concrete ducts, and also for the the Guixi Smelter manufacturing two large-size (5900 x 1740 x 1400) electrolytic slot for trial, are more successful.
    The application of polymer concrete copper electrolyzer assembly construction method and technology, can also produce other similar tank and storage tank. Non-metallic tank production technology to a new area.
    Production Process
    Physical and mechanical properties of polymer concrete
    The polymer concrete having good physical and mechanical properties (see Table 1) but due to the temperature stress of the curing process, the shrinkage stress and a temperature change caused by thermal stress, etc., tend to be generated due to these stresses larger the destruction of the tank. As it exceeds the tensile strength in the polymer concrete, it will produce a groove cracking and delamination. If these internal stress, no more than the strength of the polymer concrete, the same will significantly reduce the external bearing capacity of the tank. End to consider how to reduce or eliminate the influence of polymer concrete, the internal stress generated due to the process of solidification (hardening) of the tank body, it is an important feature of the manufacturing process of polymer concrete trough.
Table 1 for various types of absolutely what things physical and mechanical properties of the concrete

Polymer concrete mix design
    Design polymer concrete mix purpose of economic rationality, is necessary to achieve the required mechanical strength and physical properties of the tank, but also than ideal workability (liquidity) ease of construction, strive on the basis of the least amount of polymer (synthetic resin), in order to achieve economic and practical purpose.
Calculate the resin content in the polymer concrete design theory, the general content of the surface of the aggregate method and the absolute volume method two. Surface area of ??the former is the probability derived aggregates of different particle size (coarse gravel, chippings, sand, powder), the required surface area has a thin layer of a polymer (synthetic resin), and therefore most of their resin good dosage, by the following equation.
G = K (S1M1 + S2M2 + S3M3)) ρ.δ.η
Where G - polymer concrete, resin theoretical amount;
        K - coefficient of resin content of 1.05-1.10;
        S1-3 - different size aggregate the surface area cm2/kg held;
        M1-3 - the aggregate amount of kg;
        ρ - resins density kg/cm3;
delta - the thickness of the resin in a thin surface layer of the aggregate;
η - the actual viscosity of the resin, and assumes that the relationship between the standard viscosity.
   G theoretical resin content calculated according to the theory of the contents of the aggregate surface compared with the actual situation, access. First, the aggregate size is difficult to control, and therefore they are the sum of the surface area of ??the difference between the many. Second, we assume that the thickness of the thin layer of resin delta, with the actual situation, access to a larger and more in line with the actual situation, in order to obtain the best resin content of G, it is necessary to carry out the measurement and adjustment of the number of polymer concrete.
   Absolute volume method to calculate the optimum content of the resin in the polymer concrete, it is the main principle is: to fill the pores of the coarse aggregates by sand, sand porosity is filled with powder, while the porosity of the powder resin filling, resin optimum dosage based on our practical experience. According to the following formula:
G = type G - polymer concrete, resin content;
             K1 - mixing polymer concrete coefficient of working conditions;
             K1 - B - member minimum size cm A - coefficient of 0.83-0.95, d - coarse aggregate average particle size; - the coefficient of viscosity;
             QP - the amount of powder;
             DPP - powder push and density;
             SRP - powder porosity;
             Dag - resin density
    Calculated absolute volume theory of polymer concrete resin content of G, but also according to the experimental sand ratio to be adjusted.
    The amount of resin in the laboratory after this adjustment, in accordance with the relevant technical rules, making 70 × 70 × 70 test block three, first in the 40 ° C incubator for 4 hours at 15 ° C in the environment conservation, the temperature was raised to 60 ° C maintained 22 hours, cooled to room temperature, and its strength should meet the design requirements, or greater than 50MPa, the polymer concrete mix ratio can be applied.
    Polymer concrete in the actual mixing, ramming process, but also with the high and low temperatures, the amount of resin G can be multiplied by the temperature adjustment coefficient K2, because the temperature influence on the viscosity of the resin when the temperature is high K2: <1, the temperature low when K2> 1, calculated according to the following equation based on practical experience K2.
K2 = where T - polymer concrete mixing and pounding scene temperature ℃.
    Polymer concrete mix design, another key issue is that the coarse aggregate has a better gradation, and strive to porosity, coarse and fine aggregate sum of the surface area is smaller, as well as its liquidity to meet the pouring needs.
    3 assembled Law process
    Polymer concrete shrinkage in the hardening process (more than 0.1%), will cause great stress, to overall pouring tank, such internal stress is not easy to overcome, such as the use of YJ furan resin ramming of concrete tank, the curing shrinkage tensile stress will be:
    The tank due to internal stress is likely around the corner cracks. Assembly construction method can effectively overcome such additional stress on the entire tank.
The key issue is to minimize the number of seams and has a reliable connection the assembled construction method tank. Polymer concrete has a high adhesion characteristics (such as furan resin concrete bonding force of 1.5 MPa), the bonding to the system components, the tensile strength of portland cement concrete tensile strength greater than 200 #, if then after some technical processing, the assembled joints will be able to achieve a reliable connection.
    A tank is divided into five panels, the first prefabricated two main panel, and then assembled according to specifications, and then poured a pound trough bottom panel, the last watering trough end plates Serve tank (see Figure 1) . To reduce by half the number of seam construction technology of of this prefabrication and on-site pouring a combination of assembly, is a characteristic of the construction process. The construction block diagram of the process is as follows:
   (A) Polymer Concrete temperature should not be less than 10 ° C and not more than 25 ° C, otherwise it should take certain measures.
   (B) The table and mold and templates. The prefabricated tank side panels, pre-production units die, Taiwan mold surface should be smooth, it is appropriate the terrazzo or epoxy self-leveling mortar, embedded prestressed Zhang reinforcement laying around in Taiwan die at the same time. Second, filling the template, you can use wood the template or steel template, the template surface is smooth, tight joints, the template surface must be brushing mold release agents or other types of release treatment, both easy stripping and the polymer concrete Dense and shiny, not only beautify the appearance of the tank, while improving the corrosion resistance and permeation resistance.
   (C) reinforced its surface treatment. When the the Polymer Concrete curing agent is acidic, requires first brushing a layer of epoxy coatings on steel surface for isolation.