SU1308591A1 - Method of manufacturing light filler - Google Patents

Abstract

The invention relates to the production of building materials and can be used in the manufacture of lightweight aggregates obtained by firing in a rotary kiln. To increase the swelling rate of the raw material, reduce the firing temperature and improve working conditions by reducing the dustiness, the dusting material is fed into the sintering zone and swelling in the form of an aqueous suspension with flowability on the Engler viscometer for 6-15 seconds. 1 ill., 1 tab. 00 SL; O

Description

1 1308591

The invention relates to the production of building materials and can be used in the manufacture of lightweight suppressors obtained by firing in a blasting furnace.

The purpose of the invention is to increase the swelling rate, decrease the firing temperature and improve working conditions by reducing the dustiness.

2

I In comparison with the known, the proposed method provides an increase in the swelling of the raw material, as a result of which the bulk density of the aggregate decreases to the level of 270-280 kg / m. against 320 kg / m, the burning temperature decreases to 1100 ° C against 1140 ° C,

Piescheunos with gases withdrawn from the furnace decreases to the level of 2.6-2.8 g / m pro- method of making a light filling of 4.1 g / m нит of the yarn by burning the granulated material. The dusting material of the raw material in the rotary kiln includes flowable slurry from the flow of dusting material into the zone by a crowd on the Engler viscometer of sintering and swelling in the form of water for 6–15 s and with a concentration of the solid phase of the suspension with fluidity on the viscometer — 15 respectively 20–70 wt.% of the Engler supply of 6–15 s.

The drawing also shows the layout of the unit for preparing and delivering the suspension to the sintering and swelling zone of the pellets in a rotary kiln.

The assembly contains a hoist with a grab bucket 1, a chaff 2, a pump 3, a tank 4, a pump 5, a nozzle 6, which is mounted in a rotary kiln 7.

The method is carried out as follows.

Clay molded raw granules in the press. The formed granules are directed to the drying drum, where they are pelleted and dried at the temperature of the heat carrier (gas) at the entrance to the drying drum 400 C. After drying, the granules are burned in a rotary kiln with a flow of slurry into it 35 instantly dehydrated, forming

This is due to thermal decomposition of water, a large volume of water gas. The presence of water gas in the bed of the calcined material increases

si impregnator at the optimum temperature of 1100 ° C.

The suspension of the dusting agent is prepared as follows.

A clamshell bucket 1 is loaded into a dugout 2, for example, refractory ash and kaolin, taken in a 3: 1 ratio, and the suspension is prepared using Engler viscometer for 6 seconds.

40 the swelling of clay raw materials and at the same time reduces the firing temperature by 40-60 C, which reduces the consumption of process fuel. The introduction in the form of a jet of the required quantity of the wadding plant 2 by the pump 3 of its supply to the suspension is precisely dispersed in the zone into the supply tank 4, in which, in order to prevent sedimentation of turbidity, sparging is performed. From the supply tank 4 by the pump 5 through the nozzle 6, the suspension is fed into the rotary kiln 7 into the zone of sintering and swelling of the granules. The semi-finished product is loaded into the furnace 2.5. Fuel consumption 6, 1 kg / m. Expanded clay with a bulk density of 270 dust and dust is obtained of 2.7 g / m of gases.

The properties of the aggregates obtained by the proposed and known methods are presented in the table.

one

2

I In comparison with the known, the proposed method provides an increase in the swelling rate of the raw material, as a result of which the bulk density of the aggregate decreases to the level of 270-280 kg / m against 320 kg / m, the burning temperature decreases to 1100 C against 1140 C,

During the firing of the lightweight aggregate, optimal conditions for the introduction of the required amount of dispersed material (refractory powder) exactly into

20 pellet softening zone. The flow of powder in the form of a flowable jet makes it possible to regulate quickly without stopping the furnace (by changing the head and flow direction

5 jets) the point of entry (along the length of the furnace) of the dusting agent, since, as the properties of the raw materials entering the kiln change, the location of the expansion zone will also shift (soften

30 granules.

The suspension of dusting material contains 30-80 m gs.% Of water, falling into the pouring layer of firing granules in the softening zone.

40 the swelling of clay raw materials and at the same time reduces the firing temperature by 40-60 C, which reduces the consumption of process fuel. Introduction in the form of a jet of the required amount (puffing) of the granules reduces the entrainment of dusting material from the kiln together with the fumes: 1 gases.

50 Thus, the introduction of the dusting material in the form of a flowable suspension with precisely determined fluidity and concentration of the solid phase gives a double positive effect:

55 saving power and fuel consumption.

The method can find a good idea in the manufacture of expanded clay, which reduces the size of the furnace.

Claims (1)

The invention The method of making a lightweight filler by burning a granulated raw material of a rotary kiln with a supply of wet powdered material to the sintering and swelling of granules, characterized in that. refractory ash heat and kaolin (3: 1) spent catalyst IM-2201 and refractory clay (in the ratio 3: 1) The temperature in the zone of sintering and swelling, ° C 1100 The moisture content of dusting material,% 55 Impact driver kg / m lightweight filler Pyleunos, g / m of furnace gases The density of expanded clay gravel is 10-20 mm, in order to increase the swelling of the raw material, reduce the firing temperature, improve working conditions by reducing the pain, the powdered material is fed into the sintering zone and swelling in the form of an aqueous suspension with flowability on the Engler viscometer for 6-15 seconds. 15 1100 1100 1140 62 38 ten 270 280 320 Editor N. Gunko Compiled by V. Obraztsov Tehred L, Oleinik Proofreader A.Zimokesov Order 1771/20 Mintage 588 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Subscription