RU1818141C - Apparatus for releasing gaseous constituents from the slag of the phosphoric production - Google Patents

Abstract

The invention is used to assess the quality of phosphorus slag, in the production of cement, on the content of phosphine, hydrogen fluoride and other harmful gases, /.-:. , Y, v -. 1.L. :: ...-,: their isolation from the slag sample. SUMMARY OF THE INVENTION: a device consists of peafcto pa made of silica glass, which is blown with an inert gas and heated when placed in an oven to 400-800 ° C. The и-shaped reactor consists of a reaction quartz tube with a diameter of: internal - 12-13 mm, external - 15-16 mm, length 150-170 mm, into the lower part of which a purge gas is supplied using a tube with a diameter of 6-8 mm . the reaction tube has a loading opening and a gas outlet with a diameter of 6-8 mm. In the "lower part of the reactor, a fiberglass cushion is created on which a slag sample is poured through the upper hole to the level of the side pipe. 1 ill. (L

Description

The invention relates to analytical chemistry and can be used to evaluate phosphorus industry wastes, intermediates and products in the power plant. industry for the maintenance of environmentally harmful gaseous substances, c. particularly hydrogen phosphorous .;

The purpose of the invention is to simplify the design of devices ..,

This goal is achieved in that thermal desorption of phosphine from a slag sample without preliminary treatment is carried out in a device consisting of a U-shaped reactor made of quartz glass, one half of which is, directly, a reaction tube with an internal diameter of 12-13 mm and

external - 15-17 mm, length 150-170 mm, into which a sample is placed; a friend: a tube with a diameter of 6-8 mm, for supplying purge gas (argon, gel, nitrogen) from the bottom of the reactor.

The drawing shows a longitudinal section of the device.

The device consists of a reaction tube 1, a feed opening with a plug 2, a gas supply tube 3, a gas outlet 4 to which an absorption device is connected.

After loading into the reaction tube T of a sample of the analyzed sample onto the glass wool layer 6, supplying an inert purge gas through the gas supply pipe 3 and connecting to the gas outlet 4

-

00

swallowing device, the reactor is placed in a shaft furnace 5, heated to 400-800 ° C, and maintained therein for the required time. The reactor is then removed from the furnace and cooled to room temperature, the feed opening is opened, the slag sample is poured out and the reactor is loaded with a new slag sample and the analysis is repeated again. The content of absorption devices from the previous sample is analyzed for phosphine content.

The device operates as follows. : ... . ; .-.- ..

A portion of the slag 10-12 g is placed in the reaction tube and closed with a stopper. Using a hose, purge gas (argon) is supplied to the gas supply tube of the reactor, absorption devices with a solution are connected to the outlet pipe of the reactor using a hose (8-10 cm). The speed of the purge gas is measured using a penometer at the outlet of the absorption devices. The reactor is then placed in a shaft furnace.

type, heated to 400-800 ° C, and held for the required time.

The main advantages of this device are its simplicity of design,

compactness, possibility of use. a larger sample weight (up to 12 g), increasing the accuracy of the analysis by shortening the path from the gas emission area to their absorption, as well as a larger slag sample. Elimination of the need for special platinum boats for weighing slag samples .;

SUMMARY OF THE INVENTION A device for separating gaseous substances from slag from phosphorus production, including a reactor placed in a heating furnace, which consists in the fact that, in order to simplify the design, the reactor is made of U-shaped quartz glass. a mold consisting of a reaction tube with an internal diameter of 12-13 mm, a length of 150-170 mm, and a gas supply tube with a diameter of 6-8 mm.

Gas (M