Device and method for measuring stability of strong suspension pulp at normal temperature

Abstract

The invention relates to a device and a method for measuring the stability, belongs to the technical field of soil measurement, and particularly relates to a device and a method for measuring the stability of a strong suspension pulp at the normal temperature. The main principle is that a slurry container is divided into two cone parts, the volumes of the upper part and the lower part are the same, the normal sedimentation of the slurry is not affected, the upper part and the lower part of the container are connected through a union, and after the slurry stands for a set time, the union is slightly screwed, a valve is closed, the upper container and the lower container are communicated, the slurry in the upper-layer container and the slurry in the lower-layer container are respectively poured out from the top part and the bottom part, the weights of the slurries are weighed, and the settleability of the slurry is obtained through the mass difference of the slurry on the upper layer andthe slurry on the lower layer.

Description

technical field [0001] The invention relates to a stability measuring device and method, which belong to the technical field of geotechnical testing, and in particular to a stability measuring device and method of strong suspension slurry at normal temperature. Background technique [0002] The particularity of coal mine fires requires that the fire extinguishing slurry is rich in filling and sealing solid phase particles, and has strong water retention (low bleeding rate); the permanent and reliable properties of large cavity filling projects (such as filling and treatment of coal mines and gypsum mines) require that the filling slurry be often It has larger particle size solid phase particles and transport stability; the settlement stability of drilling fluid weighting agent in drilling engineering is one of its important characteristics. It can be seen that the suspension stability is one of the most important performance parameters of the slurry, and the research on fast...

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Problems solved by technology

The bleeding rate of the high water retention slurry is extremely low, and the bleeding rate cannot be measured by the method of measuring the precipitated clear water

[0005] The traditional suspensibility index is the suspension degree. The method of measurement is to dry 30 grams of suspending agent according to the regulations, add water and grind it, dilute it to 1000 ml, stir it and let it stand for 20 minutes, and read the volume of the supernatant liquid as the suspension degree. The unit is In milliliters; this method is a test method for the suspending properties of clay minerals with relatively small suspensibility. During the test, it was found that it is difficult to measure the suspending properties of super-high water-soluble suspending agents such as fiber and pectin, even if soil / sand is added to form The solid phase sedimentation in the suspended mud / mortar is a gradual process, and there is no particularly obvious interface between the solid and the liquid, that is, there is no obvious supernatant, and it is difficult to determine the stability of the suspended slurry by this method

[0006] There is also a spectrophotometer method in the prior art, but for this type of suspension slurry with loess, fly ash or sand as the base material, the solid phase particles are large, and the light is difficult to penetrate, which is different from the working principle of the tube photometer. Conflict, the result is debatable

[0007] The Chinese patent "A Test Method for the Suspension Stability of Drilling Fluid" discloses a method for measuring the density difference between the upper and lower layers of drilling fluid in a 500ml measuring cylinder after standing still for several hours. The devices used are mainly density scales and 500ml measuring cylinders. Lack of convenience

[0008] The Chinese patent "a suspension stability test device and test method" discloses a suspension stability test device and test method for testing the suspension stability of high-density working liquid solid phase particles under high temperature and high pressure. High-pressure pipelines, constant-pressure constant-speed pumps, high-temperature and high-pressure containers and other special components, with complex structures

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