Radial synthetic cement clinker

In recent years, radioactive ray has been used as an effective means to modify material properties. From simple surface treatments to more complex full conversions to new materials, the spectrum used ranges from high doses of low dose isotopes to higher doses of organics used, and the highest doses used for high-tech alloy welding. In May 2003 foreign researchers exposed the material to any desired radiation, such as alpha beta gamma rays. Rays come from controlled radioactive isotopes or particle accelerators. This new process has a high energy utilization rate, less environmental pollution, more efficient use of space, long equipment life, high product quality, and continuous operation. Based on the above advantages, this new process can be extended for the production of cement clinker.
When using radiation to synthesize ordinary Portland cement clinker, an electron beam of high energy is used. The device includes a vertically mounted electron accelerator and a voltage generator. The latter is a hollow rise transformer with segmented secondary coils. The accelerator uses a magnetic field system to focus the electron beam. The generator and accelerating tube are enclosed in a box filled with SF6 gas to avoid any open circuit. The power of the accelerator is controlled between 0 and 100 kW, and the energy of the emission line beam is between 0.8 and 1.4 MeV. The light beam emerges from the accelerator and is focused by a magnetic lens and a grid to be injected into the reaction chamber. The raw material was fed into the reaction chamber with a vibratory feeder. The material area was 25×25 cm 2 and the material layer thickness was several millimeters. After the raw material layer has been irradiated with a dose of light, it combines the clinker and descends into a water-cooled chamber. At the same time, a new layer of raw material was laid on the raw material surface. After a series of tests, it can be seen that when the absorbent is 199.29 to 398.58 J/g·s, the cement raw meal will be fully matured in a matter of seconds. If the dose is weak, the raw meal can also be fired in tens of seconds. It takes 40 minutes in a typical cement rotary kiln. And it is also observed that the firing temperature of the new process is 200°C lower than normal. The heat loss of clinker is estimated to be 800±70 kcal/kg clinker. The clinker synthesized with radiation has a darker color and is porous, and its micro-structure characteristics are different from those of ordinary clinker. Observed with a microscope, the amount of liquid phase is small.
The clinker strength of the new process is different from that of ordinary clinker: (1) When the Alit content is the same, the strength of the new process clinker is often higher than that of the ordinary clinker. When the Alit content is large, the difference also increases. (2) As the absorbed dose increases, the strength of the clinker also increases. When the total absorbed dose reaches 6975 J/g·s, the strength rises to the highest point, and when the dose continues to increase, the strength decreases. (3) When the raw material saturation is relatively low (0.82 ~ 0.86), the compressive strength of clinker synthesized by radiation can reach 50 MPa in 28 days, which is higher than that of ordinary clinker.
Under the irradiation of heavy doses of high-energy electrons, various changes of cement raw materials can be induced, such as excitation, liberation, elastic and non-elastic scattering. As a result, an astonishingly high-speed phase transition has taken place, so the mineralization of the liquid phase completely loses its importance. Therefore, neither time nor temperature is an important parameter for control. The only important parameter is the radiation dose, ie the number of electrons striking the material and its energy, which indicates the depth of electrons ramming into the material layer. The use of energy in the range of 1 to 1.4 MeV is far less than the energy (7.2 MeV) that can cause any nuclear transmutation, so there is no danger at all.