RU2149059C1 - Milling and mixing unit - Google Patents

Abstract

FIELD: construction industry, in particular, equipment for milling and mixing of raw material components for producing construction materials. SUBSTANCE: milling and mixing unit has cylindrical casing, milling chambers with milling bodies, mixing chamber with working tools, and additive inlet branch pipe. Milling chamber has working tools mounted on common shaft. Milling chamber is separated from mixing chamber by perforated partition wall. Working tools of mixing chamber are combination of blades and springs which are fixed with their ends on blades. Discharge branch pipe is offset in the direction of rotation of shaft through 45 deg. Milling bodies may be formed as cylindrical rollers or spherical parts. Ratio of diameters of milling chamber and mixing chamber may be within the range of 1.1-1.4, and length ratio of milling chamber and mixing chamber is within the range of 1.3-2. EFFECT: increased efficiency in milling and mixing of mineral components of raw material mixture and additives. 3 cl, 3 dwg

Description

 The invention relates to devices for grinding and mixing raw materials in the production of building materials, for example foam concrete.

 It is known the use of a core mill for grinding sand with cement and a paddle mixer for the preparation of porous slurry in the production of foam concrete / 1 /.

 The disadvantage of this installation is the need to use vehicles and additional feeders, which increases the cost and complicates the production.

 The closest invention to the well-known in technical essence is a grinding and mixing unit containing a cylindrical body, grinding chambers with grinding bodies, a perforated partition, a mixing chamber with working bodies and a nozzle for adding additives, loading and unloading nozzles / 2 /.

 The disadvantage of the unit is the lack of efficiency of grinding and mixing materials.

 The objective of the invention is to provide a device that provides both effective grinding of the mineral components of the raw material mixture and gentle mixing of cement, ground aggregate and water with foam and obtaining a porous suspension for foam concrete.

This task is achieved in a grinding and mixing unit containing a cylindrical body, grinding chambers with grinding bodies, a perforated baffle, a mixing chamber with working bodies and a nozzle for adding additives, loading and unloading pipes, working bodies are installed in the grinding chambers on a common shaft, while perforated the partition is located between the grinding and mixing chambers, the working bodies of the mixer are made of a combination of blades and springs fixed by the ends on the blades, and the unloading pa tubes shifted in the direction of rotation of the shaft up to 45 ^o .

 Grinding bodies can be made in the form of cylindrical rollers, equal in length to the grinding chamber, or in the form of balls, or in the form of tsilpebs.

 The diameter of the mixing chamber and the diameter of the grinding chamber have a ratio in the range 1.1 - 1.4, and the ratio of the length of the grinding chamber to the length of the mixing chamber is in the range 1.3 - 2.

 In FIG. 1 shows a General view of the grinding-mixing unit.

 In FIG. 2 is a section along AA in FIG. 1.

 In FIG. 3 is a section along BB in FIG. 1.

 The grinding and mixing unit contains a stationary housing 1, bearings 2, shaft 3, rotor 4, grinding bodies 5, mixing blades 6, springs 7, perforated baffle 8, loading nozzle 9, discharge nozzle 10, nozzle for additives and foam 11, grinding chamber 12, the mixing chamber 13, the drive 14.

 The grinding and mixing unit works, for example, in the production of foam concrete as follows.

 Raw materials - quartz sand, Portland cement and water in metered quantities are fed through the loading pipe 9 into the grinding chamber 12 with grinding media 5. The rotation of the rotor with high revolutions (200 - 1000 rpm) causes the grinding media 5 to move in the form of rollers or balls the cylindrical surface of the grinding chamber, with intensive grinding of quartz sand and additional grinding of cement.

 The crushed mixture through the perforated baffle 8 enters the mixing chamber 13. The foam obtained in a separate apparatus through an additional pipe 11 is fed into the mixing chamber 13, in which due to the action of the blades 6 and the springs 7, a porous suspension is obtained. It should be noted the gentle effect on the foam of spring working bodies, which intensively mix the technological mixture without destroying the bubbles of the foam.

 The grinding and mixing unit can be used in other technologies for the production of building materials.

 Sources of information.

 1. JSC VNIIistrom them. Budnikova P.P. Installation for the production of foam concrete blocks. Avenue. Moscow, 1995.

 2. RU 525265 A, 12.30.1982.

Claims (3)

1. A grinding and mixing unit containing a cylindrical body, grinding chambers with grinding bodies, a perforated baffle, a mixing chamber with working bodies and a nozzle for adding additives, loading and unloading pipes, characterized in that working bodies are installed in the grinding chambers on a common shaft, this perforated partition is located between the grinding and mixing chambers, the working bodies of the mixer are made of a combination of blades and springs, fixed by the ends on the blades, and the discharge pipe see Still in the direction of rotation of the shaft up to 45 ^o .  2. The grinding and mixing unit according to claim 1, characterized in that the grinding bodies are made in the form of cylindrical rollers equal in length to the grinding chamber, or in the form of balls, or in the form of tsilpebs.  3. The grinding and mixing unit according to claim 1 or 2, characterized in that the diameter of the mixing chamber and the diameter of the grinding chamber has a ratio of 1.1-1.4, and the ratio of the length of the grinding chamber to the length of the mixing chamber is within 1, 3-2.

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